diff options
| author | Patrick McHardy <kaber@trash.net> | 2007-04-17 01:59:10 +0200 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-04-26 07:29:04 +0200 |
| commit | 1c2d670f3660e9103fdcdca702f6dbf8ea7d6afb (patch) | |
| tree | 4a85b1e41f74e0c0b7445a950186b026de3ef0e0 /net/core | |
| parent | [NETLINK]: Switch cb_lock spinlock to mutex and allow to override it (diff) | |
| download | linux-1c2d670f3660e9103fdcdca702f6dbf8ea7d6afb.tar.xz linux-1c2d670f3660e9103fdcdca702f6dbf8ea7d6afb.zip | |
[RTNETLINK]: Hold rtnl_mutex during netlink dump callbacks
Hold rtnl_mutex during the entire netlink dump operation. This allows
to simplify locking in the dump callbacks, since they can now rely on
that no concurrent changes happen.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/rtnetlink.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index 648a7b6d15df..62f5c7f98d17 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -859,6 +859,7 @@ static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) int min_len; int family; int type; + int err; type = nlh->nlmsg_type; if (type > RTM_MAX) @@ -887,7 +888,10 @@ static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) if (dumpit == NULL) return -EOPNOTSUPP; - return netlink_dump_start(rtnl, skb, nlh, dumpit, NULL); + __rtnl_unlock(); + err = netlink_dump_start(rtnl, skb, nlh, dumpit, NULL); + rtnl_lock(); + return err; } memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *))); @@ -972,7 +976,7 @@ void __init rtnetlink_init(void) panic("rtnetlink_init: cannot allocate rta_buf\n"); rtnl = netlink_kernel_create(NETLINK_ROUTE, RTNLGRP_MAX, rtnetlink_rcv, - NULL, THIS_MODULE); + &rtnl_mutex, THIS_MODULE); if (rtnl == NULL) panic("rtnetlink_init: cannot initialize rtnetlink\n"); netlink_set_nonroot(NETLINK_ROUTE, NL_NONROOT_RECV); |