On Wed, Jun 14, 2017 at 04:17:43PM +0100, David Howells wrote:
> int pid_ns_prepare_proc(struct pid_namespace *ns)
> {
> + struct proc_fs_context *ctx;
> + struct fs_context *fc;
> struct vfsmount *mnt;
> + int ret;
> +
> + fc = vfs_new_fs_context(&proc_fs_type, NULL, 0, FS_CONTEXT_FOR_NEW);
> + if (IS_ERR(fc))
> + return PTR_ERR(fc);
> +
> + ctx = container_of(fc, struct proc_fs_context, fc);
> + if (ctx->pid_ns != ns) {
> + put_pid_ns(ctx->pid_ns);
> + get_pid_ns(ns);
> + ctx->pid_ns = ns;
> + }
> +
> + ret = vfs_get_tree(fc);
> + if (ret < 0) {
> + put_fs_context(fc);
> + return ret;
> + }
>
> - mnt = kern_mount_data(&proc_fs_type, ns);
> + mnt = kern_mount_data_fc(fc);
> + put_fs_context(fc);
Same as with ipc; do you need to go through dynamic allocation,
container_of, patching it up, etc.?
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