linux-ext4 - [PATCH 5/5] ext4: Get rid of ext4_fiemap_check

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Date:   Thu, 23 Apr 2020 16:17:57 +0530
From:   Ritesh Harjani <riteshh@...ux.ibm.com>
To:     linux-ext4@...r.kernel.org
Cc:     jack@...e.cz, tytso@....edu, adilger@...ger.ca,
        darrick.wong@...cle.com, hch@...radead.org,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        "Aneesh Kumar K . V" <aneesh.kumar@...ux.ibm.com>,
        Ritesh Harjani <riteshh@...ux.ibm.com>,
        Murphy Zhou <jencce.kernel@...il.com>,
        Miklos Szeredi <miklos@...redi.hu>,
        Amir Goldstein <amir73il@...il.com>,
        linux-fsdevel@...r.kernel.org, linux-unionfs@...r.kernel.org
Subject: [PATCH 5/5] ext4: Get rid of ext4_fiemap_check_ranges

Now that fiemap_check_ranges() is available for other filesystems
to use, so get rid of ext4's private version.

Signed-off-by: Ritesh Harjani <riteshh@...ux.ibm.com>
---
 fs/ext4/ioctl.c | 25 +------------------------
 1 file changed, 1 insertion(+), 24 deletions(-)

diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index 76a2b5200ba3..6a7d7e9027cd 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -733,29 +733,6 @@ static void ext4_fill_fsxattr(struct inode *inode, struct fsxattr *fa)
 		fa->fsx_projid = from_kprojid(&init_user_ns, ei->i_projid);
 }
 
-/* copied from fs/ioctl.c */
-static int ext4_fiemap_check_ranges(struct super_block *sb,
-			       u64 start, u64 len, u64 *new_len)
-{
-	u64 maxbytes = (u64) sb->s_maxbytes;
-
-	*new_len = len;
-
-	if (len == 0)
-		return -EINVAL;
-
-	if (start > maxbytes)
-		return -EFBIG;
-
-	/*
-	 * Shrink request scope to what the fs can actually handle.
-	 */
-	if (len > maxbytes || (maxbytes - len) < start)
-		*new_len = maxbytes - start;
-
-	return 0;
-}
-
 /* So that the fiemap access checks can't overflow on 32 bit machines. */
 #define FIEMAP_MAX_EXTENTS	(UINT_MAX / sizeof(struct fiemap_extent))
 
@@ -775,7 +752,7 @@ static int ext4_ioctl_get_es_cache(struct file *filp, unsigned long arg)
 	if (fiemap.fm_extent_count > FIEMAP_MAX_EXTENTS)
 		return -EINVAL;
 
-	error = ext4_fiemap_check_ranges(sb, fiemap.fm_start, fiemap.fm_length,
+	error = fiemap_check_ranges(sb, fiemap.fm_start, fiemap.fm_length,
 				    &len);
 	if (error)
 		return error;
-- 
2.21.0