From a52d726bbd928164609e6abc4dc967e819dbf09c Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Wed, 21 Mar 2012 09:52:02 -0400 Subject: nfsd: convert nfs4_client->cl_cb_flags to a generic flags field We'll need a way to flag the nfs4_client as already being recorded on stable storage so that we don't continually upcall. Currently, that's recorded in the cl_firststate field of the client struct. Using an entire u32 to store a flag is rather wasteful though. The cl_cb_flags field is only using 2 bits right now, so repurpose that to a generic flags field. Rename NFSD4_CLIENT_KILL to NFSD4_CLIENT_CB_KILL to make it evident that it's part of the callback flags. Add a mask that we can use for existing checks that look to see whether any flags are set, so that the new flags don't interfere. Convert all references to cl_firstate to the NFSD4_CLIENT_STABLE flag, and add a new NFSD4_CLIENT_RECLAIM_COMPLETE flag. Signed-off-by: Jeff Layton Signed-off-by: J. Bruce Fields --- fs/nfsd/nfs4callback.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) (limited to 'fs/nfsd/nfs4callback.c') diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c index cf6e4190e41c..0840fc4f7e4a 100644 --- a/fs/nfsd/nfs4callback.c +++ b/fs/nfsd/nfs4callback.c @@ -754,9 +754,9 @@ static void do_probe_callback(struct nfs4_client *clp) */ void nfsd4_probe_callback(struct nfs4_client *clp) { - /* XXX: atomicity? Also, should we be using cl_cb_flags? */ + /* XXX: atomicity? Also, should we be using cl_flags? */ clp->cl_cb_state = NFSD4_CB_UNKNOWN; - set_bit(NFSD4_CLIENT_CB_UPDATE, &clp->cl_cb_flags); + set_bit(NFSD4_CLIENT_CB_UPDATE, &clp->cl_flags); do_probe_callback(clp); } @@ -915,7 +915,7 @@ void nfsd4_destroy_callback_queue(void) /* must be called under the state lock */ void nfsd4_shutdown_callback(struct nfs4_client *clp) { - set_bit(NFSD4_CLIENT_KILL, &clp->cl_cb_flags); + set_bit(NFSD4_CLIENT_CB_KILL, &clp->cl_flags); /* * Note this won't actually result in a null callback; * instead, nfsd4_do_callback_rpc() will detect the killed @@ -966,15 +966,15 @@ static void nfsd4_process_cb_update(struct nfsd4_callback *cb) svc_xprt_put(clp->cl_cb_conn.cb_xprt); clp->cl_cb_conn.cb_xprt = NULL; } - if (test_bit(NFSD4_CLIENT_KILL, &clp->cl_cb_flags)) + if (test_bit(NFSD4_CLIENT_CB_KILL, &clp->cl_flags)) return; spin_lock(&clp->cl_lock); /* * Only serialized callback code is allowed to clear these * flags; main nfsd code can only set them: */ - BUG_ON(!clp->cl_cb_flags); - clear_bit(NFSD4_CLIENT_CB_UPDATE, &clp->cl_cb_flags); + BUG_ON(!(clp->cl_flags & NFSD4_CLIENT_CB_FLAG_MASK)); + clear_bit(NFSD4_CLIENT_CB_UPDATE, &clp->cl_flags); memcpy(&conn, &cb->cb_clp->cl_cb_conn, sizeof(struct nfs4_cb_conn)); c = __nfsd4_find_backchannel(clp); if (c) { @@ -1000,7 +1000,7 @@ void nfsd4_do_callback_rpc(struct work_struct *w) struct nfs4_client *clp = cb->cb_clp; struct rpc_clnt *clnt; - if (clp->cl_cb_flags) + if (clp->cl_flags & NFSD4_CLIENT_CB_FLAG_MASK) nfsd4_process_cb_update(cb); clnt = clp->cl_cb_client; -- cgit v1.2.3