On Apr. 04, 2008, 1:39 +0300, Trond Myklebust <Trond.Myklebust@xxxxxxxxxx> wrote:
> Now that we've added the 'generic' credentials (that are independent of the
> rpc_client) to the nfs_open_context, we can use those in the NLM client to
> ensure that the lock/unlock requests are authenticated to whoever
> originally opened the file.
>
> Signed-off-by: Trond Myklebust <Trond.Myklebust@xxxxxxxxxx>
> ---
>
> fs/lockd/clntproc.c | 23 ++++++++++++++---------
> 1 files changed, 14 insertions(+), 9 deletions(-)
>
> diff --git a/fs/lockd/clntproc.c b/fs/lockd/clntproc.c
> index 37d1aa2..40b16f2 100644
> --- a/fs/lockd/clntproc.c
> +++ b/fs/lockd/clntproc.c
> @@ -247,7 +247,7 @@ static int nlm_wait_on_grace(wait_queue_head_t *queue)
> * Generic NLM call
> */
> static int
> -nlmclnt_call(struct nlm_rqst *req, u32 proc)
> +nlmclnt_call(struct rpc_cred *cred, struct nlm_rqst *req, u32 proc)
very minor nit: The order of arguments seems odd to me.
I'd add cred either second or last as nlm_rqst seems to be the primary argument
for this fucntion.
> {
> struct nlm_host *host = req->a_host;
> struct rpc_clnt *clnt;
> @@ -256,6 +256,7 @@ nlmclnt_call(struct nlm_rqst *req, u32 proc)
> struct rpc_message msg = {
> .rpc_argp = argp,
> .rpc_resp = resp,
> + .rpc_cred = cred,
> };
> int status;
>
> @@ -390,11 +391,12 @@ int nlm_async_reply(struct nlm_rqst *req, u32 proc, const struct rpc_call_ops *t
> * completion in order to be able to correctly track the lock
> * state.
> */
> -static int nlmclnt_async_call(struct nlm_rqst *req, u32 proc, const struct rpc_call_ops *tk_ops)
> +static int nlmclnt_async_call(struct rpc_cred *cred, struct nlm_rqst *req, u32 proc, const struct rpc_call_ops *tk_ops)
> {
ditto.
> struct rpc_message msg = {
> .rpc_argp = &req->a_args,
> .rpc_resp = &req->a_res,
> + .rpc_cred = cred,
> };
> struct rpc_task *task;
> int err;
> @@ -415,7 +417,7 @@ nlmclnt_test(struct nlm_rqst *req, struct file_lock *fl)
> {
> int status;
>
> - status = nlmclnt_call(req, NLMPROC_TEST);
> + status = nlmclnt_call(nfs_file_cred(fl->fl_file), req, NLMPROC_TEST);
> if (status < 0)
> goto out;
>
> @@ -506,6 +508,7 @@ static int do_vfs_lock(struct file_lock *fl)
> static int
> nlmclnt_lock(struct nlm_rqst *req, struct file_lock *fl)
> {
> + struct rpc_cred *cred = nfs_file_cred(fl->fl_file);
> struct nlm_host *host = req->a_host;
> struct nlm_res *resp = &req->a_res;
> struct nlm_wait *block = NULL;
> @@ -534,7 +537,7 @@ again:
> for(;;) {
> /* Reboot protection */
> fl->fl_u.nfs_fl.state = host->h_state;
> - status = nlmclnt_call(req, NLMPROC_LOCK);
> + status = nlmclnt_call(cred, req, NLMPROC_LOCK);
> if (status < 0)
> break;
> /* Did a reclaimer thread notify us of a server reboot? */
> @@ -595,7 +598,7 @@ out_unlock:
> up_read(&host->h_rwsem);
> fl->fl_type = fl_type;
> fl->fl_flags = fl_flags;
> - nlmclnt_async_call(req, NLMPROC_UNLOCK, &nlmclnt_unlock_ops);
> + nlmclnt_async_call(cred, req, NLMPROC_UNLOCK, &nlmclnt_unlock_ops);
> return status;
> }
>
> @@ -619,8 +622,8 @@ nlmclnt_reclaim(struct nlm_host *host, struct file_lock *fl)
> nlmclnt_setlockargs(req, fl);
> req->a_args.reclaim = 1;
>
> - if ((status = nlmclnt_call(req, NLMPROC_LOCK)) >= 0
> - && req->a_res.status == nlm_granted)
> + status = nlmclnt_call(nfs_file_cred(fl->fl_file), req, NLMPROC_LOCK);
> + if (status >= 0 && req->a_res.status == nlm_granted)
> return 0;
>
> printk(KERN_WARNING "lockd: failed to reclaim lock for pid %d "
> @@ -669,7 +672,8 @@ nlmclnt_unlock(struct nlm_rqst *req, struct file_lock *fl)
> }
>
> atomic_inc(&req->a_count);
> - status = nlmclnt_async_call(req, NLMPROC_UNLOCK, &nlmclnt_unlock_ops);
> + status = nlmclnt_async_call(nfs_file_cred(fl->fl_file), req,
> + NLMPROC_UNLOCK, &nlmclnt_unlock_ops);
> if (status < 0)
> goto out;
>
> @@ -738,7 +742,8 @@ static int nlmclnt_cancel(struct nlm_host *host, int block, struct file_lock *fl
> req->a_args.block = block;
>
> atomic_inc(&req->a_count);
> - status = nlmclnt_async_call(req, NLMPROC_CANCEL, &nlmclnt_cancel_ops);
> + status = nlmclnt_async_call(nfs_file_cred(fl->fl_file), req,
> + NLMPROC_CANCEL, &nlmclnt_cancel_ops);
> if (status == 0 && req->a_res.status == nlm_lck_denied)
> status = -ENOLCK;
> nlm_release_call(req);
>
> --
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