[PATCH v3 6/6] ntfs: report shutdown errors to fsnotify

[Baolin Liu <liubaolin12138@163.com>]

From: Baolin Liu <liubaolin@kylinos.cn>

Notify FAN_FS_ERROR listeners when NTFS enters forced shutdown after
FS_IOC_SHUTDOWN or backing-device removal. Keep the shutdown state
transition and notification together in a dedicated helper.

Signed-off-by: Baolin Liu <liubaolin@kylinos.cn>
---
 fs/ntfs/super.c  | 12 +++++++++---
 fs/ntfs/volume.h |  1 +
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/fs/ntfs/super.c b/fs/ntfs/super.c
index a7a7ecf9d074..a0d3934ef6c8 100644
--- a/fs/ntfs/super.c
+++ b/fs/ntfs/super.c
@@ -414,6 +414,12 @@ void ntfs_report_file_metadata_error(struct inode *inode, int error)
 		fserror_report_file_metadata(inode, error, GFP_ATOMIC);
 }
 
+void ntfs_report_shutdown(struct ntfs_volume *vol)
+{
+	NVolSetShutdown(vol);
+	fserror_report_shutdown(vol->sb, GFP_ATOMIC);
+}
+
 void ntfs_handle_error(struct super_block *sb)
 {
 	struct ntfs_volume *vol = NTFS_SB(sb);
@@ -430,7 +436,7 @@ void ntfs_handle_error(struct super_block *sb)
 		      sb->s_id);
 	} else if (vol->on_errors == ON_ERRORS_CONTINUE) {
 		if (errseq_check(&sb->s_wb_err, vol->wb_err) == -ENODEV) {
-			NVolSetShutdown(vol);
+			ntfs_report_shutdown(vol);
 			vol->wb_err = sb->s_wb_err;
 		}
 	}
@@ -2086,10 +2092,10 @@ int ntfs_force_shutdown(struct super_block *sb, u32 flags)
 		if (ret)
 			return ret;
 		bdev_thaw(sb->s_bdev);
-		NVolSetShutdown(vol);
+		ntfs_report_shutdown(vol);
 		break;
 	case FS_SHUTDOWN_FLAGS_NOLOGFLUSH:
-		NVolSetShutdown(vol);
+		ntfs_report_shutdown(vol);
 		break;
 	default:
 		return -EINVAL;
diff --git a/fs/ntfs/volume.h b/fs/ntfs/volume.h
index 366e9f5d0443..648fe8991304 100644
--- a/fs/ntfs/volume.h
+++ b/fs/ntfs/volume.h
@@ -256,6 +256,7 @@ DEFINE_NVOL_BIT_OPS(SymlinkNative)
 
 void ntfs_report_metadata_error(struct ntfs_volume *vol, int error);
 void ntfs_report_file_metadata_error(struct inode *inode, int error);
+void ntfs_report_shutdown(struct ntfs_volume *vol);
 
 static inline void ntfs_inc_free_clusters(struct ntfs_volume *vol, s64 nr)
 {
-- 
2.51.0