| Message ID | 20201113065555.147276-6-cgxu519@mykernel.net (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | implement containerized syncfs for overlayfs | expand |
diff --git a/fs/overlayfs/file.c b/fs/overlayfs/file.c index efccb7c1f9bc..3f9de5343513 100644 --- a/fs/overlayfs/file.c +++ b/fs/overlayfs/file.c @@ -486,6 +486,9 @@ static int ovl_mmap(struct file *file, struct vm_area_struct *vma) /* Drop reference count from new vm_file value */ fput(realfile); } else { + if (ovl_inode_upper(file_inode(file)) && + vma->vm_flags & VM_SHARED) + ovl_mark_inode_dirty(file_inode(file)); /* Drop reference count from previous vm_file value */ fput(file); }
Overlayfs cannot be notified when mmapped area gets dirty, so we need to proactively mark inode dirty in ->mmap operation. Signed-off-by: Chengguang Xu <cgxu519@mykernel.net> --- fs/overlayfs/file.c | 3 +++ 1 file changed, 3 insertions(+)