fuse: use iversion for readdir cache verification

Use the internal iversion counter to make sure modifications of the
directory through this filesystem are not missed by the mtime check (due to
mtime granularity).

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index 3deb013a289e..d9d1ea78efa6 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -120,6 +120,9 @@ struct fuse_inode {
 		/* modification time of directory when cache was started */
 		struct timespec64 mtime;
 
+		/* iversion of directory when cache was started */
+		u64 iversion;
+
 		/* protects above fields */
 		spinlock_t lock;
 	} rdc;