linux-kernel - [PATCH 3/3] ntfs3: add FS_IOC

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Message-Id: <20250828203716.468564-4-ethan.ferguson@zetier.com>
Date: Thu, 28 Aug 2025 16:37:16 -0400
From: Ethan Ferguson <ethan.ferguson@...ier.com>
To: almaz.alexandrovich@...agon-software.com
Cc: ntfs3@...ts.linux.dev,
	linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Ethan Ferguson <ethan.ferguson@...ier.com>
Subject: [PATCH 3/3] ntfs3: add FS_IOC_SETFSLABEL ioctl

Add support for the FS_IOC_SETFSLABEL ioctl.

Signed-off-by: Ethan Ferguson <ethan.ferguson@...ier.com>

---
 fs/ntfs3/file.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/fs/ntfs3/file.c b/fs/ntfs3/file.c
index 0a1e9f16ffaf..4c90ec2fa2ea 100644
--- a/fs/ntfs3/file.c
+++ b/fs/ntfs3/file.c
@@ -57,6 +57,22 @@ static int ntfs_ioctl_get_volume_label(struct ntfs_sb_info *sbi, u8 __user *buf)
 	return 0;
 }
 
+static int ntfs_ioctl_set_volume_label(struct ntfs_sb_info *sbi, u8 __user *buf)
+{
+	u8 user[FSLABEL_MAX] = {0};
+	int len;
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+
+	if (copy_from_user(user, buf, FSLABEL_MAX))
+		return -EFAULT;
+
+	len = strnlen(user, FSLABEL_MAX);
+
+	return ntfs_set_label(sbi, user, len);
+}
+
 /*
  * ntfs_ioctl - file_operations::unlocked_ioctl
  */
@@ -74,6 +90,8 @@ long ntfs_ioctl(struct file *filp, u32 cmd, unsigned long arg)
 		return ntfs_ioctl_fitrim(sbi, arg);
 	case FS_IOC_GETFSLABEL:
 		return ntfs_ioctl_get_volume_label(sbi, (u8 __user *)arg);
+	case FS_IOC_SETFSLABEL:
+		return ntfs_ioctl_set_volume_label(sbi, (u8 __user *)arg);
 	}
 	return -ENOTTY; /* Inappropriate ioctl for device. */
 }
-- 
2.34.1