From 391fbdc5d527149578490db2f1619951d91f3561 Mon Sep 17 00:00:00 2001 From: Christine Caulfield Date: Thu, 7 May 2009 10:54:16 -0500 Subject: dlm: connect to nodes earlier Make network connections to other nodes earlier, in the context of dlm_recoverd. This avoids connecting to nodes from dlm_send where we try to avoid allocations which could possibly deadlock if memory reclaim goes into the cluster fs which may try to do a dlm operation. Signed-off-by: Christine Caulfield Signed-off-by: David Teigland --- fs/dlm/lowcomms.c | 16 +++++++++++++++- fs/dlm/lowcomms.h | 3 ++- fs/dlm/member.c | 11 +++++++++-- 3 files changed, 26 insertions(+), 4 deletions(-) diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c index 609108a8326..2559a97f0dd 100644 --- a/fs/dlm/lowcomms.c +++ b/fs/dlm/lowcomms.c @@ -309,6 +309,20 @@ static void lowcomms_state_change(struct sock *sk) lowcomms_write_space(sk); } +int dlm_lowcomms_connect_node(int nodeid) +{ + struct connection *con; + + if (nodeid == dlm_our_nodeid()) + return 0; + + con = nodeid2con(nodeid, GFP_NOFS); + if (!con) + return -ENOMEM; + lowcomms_connect_sock(con); + return 0; +} + /* Make a socket active */ static int add_sock(struct socket *sock, struct connection *con) { @@ -1421,7 +1435,7 @@ static int work_start(void) static void stop_conn(struct connection *con) { con->flags |= 0x0F; - if (con->sock) + if (con->sock && con->sock->sk) con->sock->sk->sk_user_data = NULL; } diff --git a/fs/dlm/lowcomms.h b/fs/dlm/lowcomms.h index a9a9618c0d3..1311e642628 100644 --- a/fs/dlm/lowcomms.h +++ b/fs/dlm/lowcomms.h @@ -2,7 +2,7 @@ ******************************************************************************* ** ** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. -** Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved. +** Copyright (C) 2004-2009 Red Hat, Inc. All rights reserved. ** ** This copyrighted material is made available to anyone wishing to use, ** modify, copy, or redistribute it subject to the terms and conditions @@ -19,6 +19,7 @@ void dlm_lowcomms_stop(void); int dlm_lowcomms_close(int nodeid); void *dlm_lowcomms_get_buffer(int nodeid, int len, gfp_t allocation, char **ppc); void dlm_lowcomms_commit_buffer(void *mh); +int dlm_lowcomms_connect_node(int nodeid); #endif /* __LOWCOMMS_DOT_H__ */ diff --git a/fs/dlm/member.c b/fs/dlm/member.c index 26133f05ae3..2afb77051cc 100644 --- a/fs/dlm/member.c +++ b/fs/dlm/member.c @@ -1,7 +1,7 @@ /****************************************************************************** ******************************************************************************* ** -** Copyright (C) 2005-2008 Red Hat, Inc. All rights reserved. +** Copyright (C) 2005-2009 Red Hat, Inc. All rights reserved. ** ** This copyrighted material is made available to anyone wishing to use, ** modify, copy, or redistribute it subject to the terms and conditions @@ -17,6 +17,7 @@ #include "recover.h" #include "rcom.h" #include "config.h" +#include "lowcomms.h" static void add_ordered_member(struct dlm_ls *ls, struct dlm_member *new) { @@ -45,7 +46,7 @@ static void add_ordered_member(struct dlm_ls *ls, struct dlm_member *new) static int dlm_add_member(struct dlm_ls *ls, int nodeid) { struct dlm_member *memb; - int w; + int w, error; memb = kzalloc(sizeof(struct dlm_member), GFP_KERNEL); if (!memb) @@ -57,6 +58,12 @@ static int dlm_add_member(struct dlm_ls *ls, int nodeid) return w; } + error = dlm_lowcomms_connect_node(nodeid); + if (error < 0) { + kfree(memb); + return error; + } + memb->nodeid = nodeid; memb->weight = w; add_ordered_member(ls, memb); -- cgit v1.2.3-70-g09d2