From: Hongbo Li <lihongbo22@huawei.com>
Date: Mon, 3 Jun 2024 13:26:18 +0000 (+0800)
Subject: bcachefs: implement FS_IOC_GETVERSION to support lsattr
X-Git-Tag: v6.11-rc1~120^2~51
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8a4ef7e28abade861d894e25b167988c5b8977a7;p=thirdparty%2Flinux.git

bcachefs: implement FS_IOC_GETVERSION to support lsattr

In this patch we add the FS_IOC_GETVERSION ioctl for getting
i_generation from inode, after that, users can list file's
generation number by using "lsattr".

Signed-off-by: Hongbo Li <lihongbo22@huawei.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
---

diff --git a/fs/bcachefs/fs-ioctl.c b/fs/bcachefs/fs-ioctl.c
index 79a0c8732bced..add90172b4758 100644
--- a/fs/bcachefs/fs-ioctl.c
+++ b/fs/bcachefs/fs-ioctl.c
@@ -272,6 +272,11 @@ err1:
 	return ret;
 }
 
+static int bch2_ioc_getversion(struct bch_inode_info *inode, u32 __user *arg)
+{
+	return put_user(inode->v.i_generation, arg);
+}
+
 static int bch2_ioc_goingdown(struct bch_fs *c, u32 __user *arg)
 {
 	u32 flags;
@@ -499,7 +504,7 @@ long bch2_fs_file_ioctl(struct file *file, unsigned cmd, unsigned long arg)
 		break;
 
 	case FS_IOC_GETVERSION:
-		ret = -ENOTTY;
+		ret = bch2_ioc_getversion(inode, (u32 __user *) arg);
 		break;
 
 	case FS_IOC_SETVERSION:
@@ -547,6 +552,9 @@ long bch2_compat_fs_ioctl(struct file *file, unsigned cmd, unsigned long arg)
 	case FS_IOC32_SETFLAGS:
 		cmd = FS_IOC_SETFLAGS;
 		break;
+	case FS_IOC32_GETVERSION:
+		cmd = FS_IOC_GETVERSION;
+		break;
 	default:
 		return -ENOIOCTLCMD;
 	}