From 82ec90eac304e81b1389175b4dded7abecc678ef Mon Sep 17 00:00:00 2001 From: Yinghai Lu Date: Thu, 17 May 2012 18:51:11 -0700 Subject: resources: allow adjust_resource() for resources with no parent If a resource has no parent, allow its start/end to be set arbitrarily as long as any children are still contained within the new range. [bhelgaas: changelog] Signed-off-by: Yinghai Lu Signed-off-by: Bjorn Helgaas --- kernel/resource.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) (limited to 'kernel') diff --git a/kernel/resource.c b/kernel/resource.c index e1d2b8ee76d..dc8b4776444 100644 --- a/kernel/resource.c +++ b/kernel/resource.c @@ -722,14 +722,12 @@ int adjust_resource(struct resource *res, resource_size_t start, resource_size_t write_lock(&resource_lock); + if (!parent) + goto skip; + if ((start < parent->start) || (end > parent->end)) goto out; - for (tmp = res->child; tmp; tmp = tmp->sibling) { - if ((tmp->start < start) || (tmp->end > end)) - goto out; - } - if (res->sibling && (res->sibling->start <= end)) goto out; @@ -741,6 +739,11 @@ int adjust_resource(struct resource *res, resource_size_t start, resource_size_t goto out; } +skip: + for (tmp = res->child; tmp; tmp = tmp->sibling) + if ((tmp->start < start) || (tmp->end > end)) + goto out; + res->start = start; res->end = end; result = 0; -- cgit v1.2.3-70-g09d2 From 6648bd7e0e62c0c8c03b15e00c9e7015e232feff Mon Sep 17 00:00:00 2001 From: Alexander Duyck Date: Thu, 21 Jun 2012 13:58:31 +0000 Subject: ipv4: Add sysctl knob to control early socket demux This change is meant to add a control for disabling early socket demux. The main motivation behind this patch is to provide an option to disable the feature as it adds an additional cost to routing that reduces overall throughput by up to 5%. For example one of my systems went from 12.1Mpps to 11.6 after the early socket demux was added. It looks like the reason for the regression is that we are now having to perform two lookups, first the one for an established socket, and then the one for the routing table. By adding this patch and toggling the value for ip_early_demux to 0 I am able to get back to the 12.1Mpps I was previously seeing. [ Move local variables in ip_rcv_finish() down into the basic block in which they are actually used. -DaveM ] Signed-off-by: Alexander Duyck Signed-off-by: David S. Miller --- include/linux/sysctl.h | 1 + include/net/ip.h | 3 +++ kernel/sysctl_binary.c | 2 ++ net/ipv4/ip_input.c | 22 +++++++++++++--------- net/ipv4/sysctl_net_ipv4.c | 7 +++++++ 5 files changed, 26 insertions(+), 9 deletions(-) (limited to 'kernel') diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h index c34b4c82b0d..20825e5f433 100644 --- a/include/linux/sysctl.h +++ b/include/linux/sysctl.h @@ -425,6 +425,7 @@ enum NET_TCP_ALLOWED_CONG_CONTROL=123, NET_TCP_MAX_SSTHRESH=124, NET_TCP_FRTO_RESPONSE=125, + NET_IPV4_EARLY_DEMUX=126, }; enum { diff --git a/include/net/ip.h b/include/net/ip.h index 83e0619f59d..50841bd6f10 100644 --- a/include/net/ip.h +++ b/include/net/ip.h @@ -210,6 +210,9 @@ extern int inet_peer_threshold; extern int inet_peer_minttl; extern int inet_peer_maxttl; +/* From ip_input.c */ +extern int sysctl_ip_early_demux; + /* From ip_output.c */ extern int sysctl_ip_dynaddr; diff --git a/kernel/sysctl_binary.c b/kernel/sysctl_binary.c index a650694883a..6a3cf8253aa 100644 --- a/kernel/sysctl_binary.c +++ b/kernel/sysctl_binary.c @@ -415,6 +415,8 @@ static const struct bin_table bin_net_ipv4_table[] = { { CTL_INT, NET_IPV4_IPFRAG_SECRET_INTERVAL, "ipfrag_secret_interval" }, /* NET_IPV4_IPFRAG_MAX_DIST "ipfrag_max_dist" no longer used */ + { CTL_INT, NET_IPV4_EARLY_DEMUX, "ip_early_demux" }, + { CTL_INT, 2088 /* NET_IPQ_QMAX */, "ip_queue_maxlen" }, /* NET_TCP_DEFAULT_WIN_SCALE unused */ diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c index 93b092c9a39..bca25179cdb 100644 --- a/net/ipv4/ip_input.c +++ b/net/ipv4/ip_input.c @@ -313,6 +313,8 @@ drop: return true; } +int sysctl_ip_early_demux __read_mostly = 1; + static int ip_rcv_finish(struct sk_buff *skb) { const struct iphdr *iph = ip_hdr(skb); @@ -323,16 +325,18 @@ static int ip_rcv_finish(struct sk_buff *skb) * how the packet travels inside Linux networking. */ if (skb_dst(skb) == NULL) { - const struct net_protocol *ipprot; - int protocol = iph->protocol; - int err; + int err = -ENOENT; - rcu_read_lock(); - ipprot = rcu_dereference(inet_protos[protocol]); - err = -ENOENT; - if (ipprot && ipprot->early_demux) - err = ipprot->early_demux(skb); - rcu_read_unlock(); + if (sysctl_ip_early_demux) { + const struct net_protocol *ipprot; + int protocol = iph->protocol; + + rcu_read_lock(); + ipprot = rcu_dereference(inet_protos[protocol]); + if (ipprot && ipprot->early_demux) + err = ipprot->early_demux(skb); + rcu_read_unlock(); + } if (err) { err = ip_route_input_noref(skb, iph->daddr, iph->saddr, diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c index ef32956ed65..12aa0c5867c 100644 --- a/net/ipv4/sysctl_net_ipv4.c +++ b/net/ipv4/sysctl_net_ipv4.c @@ -300,6 +300,13 @@ static struct ctl_table ipv4_table[] = { .mode = 0644, .proc_handler = proc_dointvec }, + { + .procname = "ip_early_demux", + .data = &sysctl_ip_early_demux, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = proc_dointvec + }, { .procname = "ip_dynaddr", .data = &sysctl_ip_dynaddr, -- cgit v1.2.3-70-g09d2 From dfbce08c19cba2ba4faaf8c0dd6d7678f46c78dd Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Fri, 22 Jun 2012 23:02:22 -0700 Subject: ipv4: Don't add deprecated new binary sysctl value. Reported-by: Eric Dumazet Signed-off-by: David S. Miller --- include/linux/sysctl.h | 1 - kernel/sysctl_binary.c | 2 -- 2 files changed, 3 deletions(-) (limited to 'kernel') diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h index 20825e5f433..c34b4c82b0d 100644 --- a/include/linux/sysctl.h +++ b/include/linux/sysctl.h @@ -425,7 +425,6 @@ enum NET_TCP_ALLOWED_CONG_CONTROL=123, NET_TCP_MAX_SSTHRESH=124, NET_TCP_FRTO_RESPONSE=125, - NET_IPV4_EARLY_DEMUX=126, }; enum { diff --git a/kernel/sysctl_binary.c b/kernel/sysctl_binary.c index 6a3cf8253aa..a650694883a 100644 --- a/kernel/sysctl_binary.c +++ b/kernel/sysctl_binary.c @@ -415,8 +415,6 @@ static const struct bin_table bin_net_ipv4_table[] = { { CTL_INT, NET_IPV4_IPFRAG_SECRET_INTERVAL, "ipfrag_secret_interval" }, /* NET_IPV4_IPFRAG_MAX_DIST "ipfrag_max_dist" no longer used */ - { CTL_INT, NET_IPV4_EARLY_DEMUX, "ip_early_demux" }, - { CTL_INT, 2088 /* NET_IPQ_QMAX */, "ip_queue_maxlen" }, /* NET_TCP_DEFAULT_WIN_SCALE unused */ -- cgit v1.2.3-70-g09d2 From c64e66c67b574f25a048886807c2007d17d50d0a Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Tue, 26 Jun 2012 21:45:21 -0700 Subject: audit: netlink: Move away from NLMSG_NEW(). And use nlmsg_data() while we're here too. Signed-off-by: David S. Miller --- kernel/audit.c | 23 +++++++++++++---------- 1 file changed, 13 insertions(+), 10 deletions(-) (limited to 'kernel') diff --git a/kernel/audit.c b/kernel/audit.c index 1c7f2c61416..30b252a1fb6 100644 --- a/kernel/audit.c +++ b/kernel/audit.c @@ -384,7 +384,7 @@ static void audit_hold_skb(struct sk_buff *skb) static void audit_printk_skb(struct sk_buff *skb) { struct nlmsghdr *nlh = nlmsg_hdr(skb); - char *data = NLMSG_DATA(nlh); + char *data = nlmsg_data(nlh); if (nlh->nlmsg_type != AUDIT_EOE) { if (printk_ratelimit()) @@ -516,14 +516,15 @@ struct sk_buff *audit_make_reply(int pid, int seq, int type, int done, if (!skb) return NULL; - nlh = NLMSG_NEW(skb, pid, seq, t, size, flags); - data = NLMSG_DATA(nlh); + nlh = nlmsg_put(skb, pid, seq, t, size, flags); + if (!nlh) + goto out_kfree_skb; + data = nlmsg_data(nlh); memcpy(data, payload, size); return skb; -nlmsg_failure: /* Used by NLMSG_NEW */ - if (skb) - kfree_skb(skb); +out_kfree_skb: + kfree_skb(skb); return NULL; } @@ -680,7 +681,7 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh) sessionid = audit_get_sessionid(current); security_task_getsecid(current, &sid); seq = nlh->nlmsg_seq; - data = NLMSG_DATA(nlh); + data = nlmsg_data(nlh); switch (msg_type) { case AUDIT_GET: @@ -1060,13 +1061,15 @@ static struct audit_buffer * audit_buffer_alloc(struct audit_context *ctx, ab->skb = nlmsg_new(AUDIT_BUFSIZ, gfp_mask); if (!ab->skb) - goto nlmsg_failure; + goto err; - nlh = NLMSG_NEW(ab->skb, 0, 0, type, 0, 0); + nlh = nlmsg_put(ab->skb, 0, 0, type, 0, 0); + if (!nlh) + goto out_kfree_skb; return ab; -nlmsg_failure: /* Used by NLMSG_NEW */ +out_kfree_skb: kfree_skb(ab->skb); ab->skb = NULL; err: -- cgit v1.2.3-70-g09d2 From a31f2d17b331db970259e875b7223d3aba7e3821 Mon Sep 17 00:00:00 2001 From: Pablo Neira Ayuso Date: Fri, 29 Jun 2012 06:15:21 +0000 Subject: netlink: add netlink_kernel_cfg parameter to netlink_kernel_create This patch adds the following structure: struct netlink_kernel_cfg { unsigned int groups; void (*input)(struct sk_buff *skb); struct mutex *cb_mutex; }; That can be passed to netlink_kernel_create to set optional configurations for netlink kernel sockets. I've populated this structure by looking for NULL and zero parameters at the existing code. The remaining parameters that always need to be set are still left in the original interface. That includes optional parameters for the netlink socket creation. This allows easy extensibility of this interface in the future. This patch also adapts all callers to use this new interface. Signed-off-by: Pablo Neira Ayuso Signed-off-by: David S. Miller --- crypto/crypto_user.c | 7 +++++-- drivers/connector/connector.c | 13 +++++++++---- drivers/infiniband/core/netlink.c | 7 +++++-- drivers/scsi/scsi_netlink.c | 7 +++++-- drivers/scsi/scsi_transport_iscsi.c | 9 ++++++--- drivers/staging/gdm72xx/netlink_k.c | 6 ++++-- include/linux/netlink.h | 15 ++++++++++----- kernel/audit.c | 7 +++++-- lib/kobject_uevent.c | 5 ++++- net/bridge/netfilter/ebt_ulog.c | 6 ++++-- net/core/rtnetlink.c | 9 +++++++-- net/core/sock_diag.c | 8 ++++++-- net/decnet/netfilter/dn_rtmsg.c | 8 +++++--- net/ipv4/fib_frontend.c | 7 +++++-- net/ipv4/netfilter/ipt_ULOG.c | 8 +++++--- net/netfilter/nfnetlink.c | 7 +++++-- net/netlink/af_netlink.c | 16 ++++++++++------ net/netlink/genetlink.c | 10 +++++++--- net/xfrm/xfrm_user.c | 7 +++++-- security/selinux/netlink.c | 6 +++++- 20 files changed, 117 insertions(+), 51 deletions(-) (limited to 'kernel') diff --git a/crypto/crypto_user.c b/crypto/crypto_user.c index 5a37eadb4e5..ba2c611154a 100644 --- a/crypto/crypto_user.c +++ b/crypto/crypto_user.c @@ -496,9 +496,12 @@ static void crypto_netlink_rcv(struct sk_buff *skb) static int __init crypto_user_init(void) { + struct netlink_kernel_cfg cfg = { + .input = crypto_netlink_rcv, + }; + crypto_nlsk = netlink_kernel_create(&init_net, NETLINK_CRYPTO, - 0, crypto_netlink_rcv, - NULL, THIS_MODULE); + THIS_MODULE, &cfg); if (!crypto_nlsk) return -ENOMEM; diff --git a/drivers/connector/connector.c b/drivers/connector/connector.c index 34e0e9e4d91..116cf8d0283 100644 --- a/drivers/connector/connector.c +++ b/drivers/connector/connector.c @@ -251,15 +251,20 @@ static const struct file_operations cn_file_ops = { .release = single_release }; +static struct cn_dev cdev = { + .input = cn_rx_skb, +}; + static int __devinit cn_init(void) { struct cn_dev *dev = &cdev; - - dev->input = cn_rx_skb; + struct netlink_kernel_cfg cfg = { + .groups = CN_NETLINK_USERS + 0xf, + .input = dev->input, + }; dev->nls = netlink_kernel_create(&init_net, NETLINK_CONNECTOR, - CN_NETLINK_USERS + 0xf, - dev->input, NULL, THIS_MODULE); + THIS_MODULE, &cfg); if (!dev->nls) return -EIO; diff --git a/drivers/infiniband/core/netlink.c b/drivers/infiniband/core/netlink.c index 1e691dca182..3ae2bfd3101 100644 --- a/drivers/infiniband/core/netlink.c +++ b/drivers/infiniband/core/netlink.c @@ -173,8 +173,11 @@ static void ibnl_rcv(struct sk_buff *skb) int __init ibnl_init(void) { - nls = netlink_kernel_create(&init_net, NETLINK_RDMA, 0, ibnl_rcv, - NULL, THIS_MODULE); + struct netlink_kernel_cfg cfg = { + .input = ibnl_rcv, + }; + + nls = netlink_kernel_create(&init_net, NETLINK_RDMA, THIS_MODULE, &cfg); if (!nls) { pr_warn("Failed to create netlink socket\n"); return -ENOMEM; diff --git a/drivers/scsi/scsi_netlink.c b/drivers/scsi/scsi_netlink.c index c77628afbf9..8818dd681c1 100644 --- a/drivers/scsi/scsi_netlink.c +++ b/drivers/scsi/scsi_netlink.c @@ -486,6 +486,10 @@ void scsi_netlink_init(void) { int error; + struct netlink_kernel_cfg cfg = { + .input = scsi_nl_rcv_msg, + .groups = SCSI_NL_GRP_CNT, + }; INIT_LIST_HEAD(&scsi_nl_drivers); @@ -497,8 +501,7 @@ scsi_netlink_init(void) } scsi_nl_sock = netlink_kernel_create(&init_net, NETLINK_SCSITRANSPORT, - SCSI_NL_GRP_CNT, scsi_nl_rcv_msg, NULL, - THIS_MODULE); + THIS_MODULE, &cfg); if (!scsi_nl_sock) { printk(KERN_ERR "%s: register of receive handler failed\n", __func__); diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c index 1cf640e575d..6042954d8f3 100644 --- a/drivers/scsi/scsi_transport_iscsi.c +++ b/drivers/scsi/scsi_transport_iscsi.c @@ -2936,7 +2936,10 @@ EXPORT_SYMBOL_GPL(iscsi_unregister_transport); static __init int iscsi_transport_init(void) { int err; - + struct netlink_kernel_cfg cfg = { + .groups = 1, + .input = iscsi_if_rx, + }; printk(KERN_INFO "Loading iSCSI transport class v%s.\n", ISCSI_TRANSPORT_VERSION); @@ -2966,8 +2969,8 @@ static __init int iscsi_transport_init(void) if (err) goto unregister_conn_class; - nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, 1, iscsi_if_rx, - NULL, THIS_MODULE); + nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, + THIS_MODULE, &cfg); if (!nls) { err = -ENOBUFS; goto unregister_session_class; diff --git a/drivers/staging/gdm72xx/netlink_k.c b/drivers/staging/gdm72xx/netlink_k.c index 2489bb5597c..87c3a07ed80 100644 --- a/drivers/staging/gdm72xx/netlink_k.c +++ b/drivers/staging/gdm72xx/netlink_k.c @@ -88,13 +88,15 @@ struct sock *netlink_init(int unit, void (*cb)(struct net_device *dev, u16 type, void *msg, int len)) { struct sock *sock; + struct netlink_kernel_cfg cfg = { + .input = netlink_rcv, + }; #if !defined(DEFINE_MUTEX) init_MUTEX(&netlink_mutex); #endif - sock = netlink_kernel_create(&init_net, unit, 0, netlink_rcv, NULL, - THIS_MODULE); + sock = netlink_kernel_create(&init_net, unit, THIS_MODULE, &cfg); if (sock) rcv_cb = cb; diff --git a/include/linux/netlink.h b/include/linux/netlink.h index ed33f0901bc..6085e4919cb 100644 --- a/include/linux/netlink.h +++ b/include/linux/netlink.h @@ -174,11 +174,16 @@ struct netlink_skb_parms { extern void netlink_table_grab(void); extern void netlink_table_ungrab(void); -extern struct sock *netlink_kernel_create(struct net *net, - int unit,unsigned int groups, - void (*input)(struct sk_buff *skb), - struct mutex *cb_mutex, - struct module *module); +/* optional Netlink kernel configuration parameters */ +struct netlink_kernel_cfg { + unsigned int groups; + void (*input)(struct sk_buff *skb); + struct mutex *cb_mutex; +}; + +extern struct sock *netlink_kernel_create(struct net *net, int unit, + struct module *module, + struct netlink_kernel_cfg *cfg); extern void netlink_kernel_release(struct sock *sk); extern int __netlink_change_ngroups(struct sock *sk, unsigned int groups); extern int netlink_change_ngroups(struct sock *sk, unsigned int groups); diff --git a/kernel/audit.c b/kernel/audit.c index 30b252a1fb6..4a3f28d2ca6 100644 --- a/kernel/audit.c +++ b/kernel/audit.c @@ -962,14 +962,17 @@ static void audit_receive(struct sk_buff *skb) static int __init audit_init(void) { int i; + struct netlink_kernel_cfg cfg = { + .input = audit_receive, + }; if (audit_initialized == AUDIT_DISABLED) return 0; printk(KERN_INFO "audit: initializing netlink socket (%s)\n", audit_default ? "enabled" : "disabled"); - audit_sock = netlink_kernel_create(&init_net, NETLINK_AUDIT, 0, - audit_receive, NULL, THIS_MODULE); + audit_sock = netlink_kernel_create(&init_net, NETLINK_AUDIT, + THIS_MODULE, &cfg); if (!audit_sock) audit_panic("cannot initialize netlink socket"); else diff --git a/lib/kobject_uevent.c b/lib/kobject_uevent.c index 1a91efa6d12..0401d2916d9 100644 --- a/lib/kobject_uevent.c +++ b/lib/kobject_uevent.c @@ -373,13 +373,16 @@ EXPORT_SYMBOL_GPL(add_uevent_var); static int uevent_net_init(struct net *net) { struct uevent_sock *ue_sk; + struct netlink_kernel_cfg cfg = { + .groups = 1, + }; ue_sk = kzalloc(sizeof(*ue_sk), GFP_KERNEL); if (!ue_sk) return -ENOMEM; ue_sk->sk = netlink_kernel_create(net, NETLINK_KOBJECT_UEVENT, - 1, NULL, NULL, THIS_MODULE); + THIS_MODULE, &cfg); if (!ue_sk->sk) { printk(KERN_ERR "kobject_uevent: unable to create netlink socket!\n"); diff --git a/net/bridge/netfilter/ebt_ulog.c b/net/bridge/netfilter/ebt_ulog.c index 1bd173218f7..374bdcd7703 100644 --- a/net/bridge/netfilter/ebt_ulog.c +++ b/net/bridge/netfilter/ebt_ulog.c @@ -282,6 +282,9 @@ static int __init ebt_ulog_init(void) { int ret; int i; + struct netlink_kernel_cfg cfg = { + .groups = EBT_ULOG_MAXNLGROUPS, + }; if (nlbufsiz >= 128*1024) { pr_warning("Netlink buffer has to be <= 128kB," @@ -296,8 +299,7 @@ static int __init ebt_ulog_init(void) } ebtulognl = netlink_kernel_create(&init_net, NETLINK_NFLOG, - EBT_ULOG_MAXNLGROUPS, NULL, NULL, - THIS_MODULE); + THIS_MODULE, &cfg); if (!ebtulognl) ret = -ENOMEM; else if ((ret = xt_register_target(&ebt_ulog_tg_reg)) != 0) diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index bc8a1cdaac9..2b325c340b4 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -2353,8 +2353,13 @@ static struct notifier_block rtnetlink_dev_notifier = { static int __net_init rtnetlink_net_init(struct net *net) { struct sock *sk; - sk = netlink_kernel_create(net, NETLINK_ROUTE, RTNLGRP_MAX, - rtnetlink_rcv, &rtnl_mutex, THIS_MODULE); + struct netlink_kernel_cfg cfg = { + .groups = RTNLGRP_MAX, + .input = rtnetlink_rcv, + .cb_mutex = &rtnl_mutex, + }; + + sk = netlink_kernel_create(net, NETLINK_ROUTE, THIS_MODULE, &cfg); if (!sk) return -ENOMEM; net->rtnl = sk; diff --git a/net/core/sock_diag.c b/net/core/sock_diag.c index ff2967acbfa..07a29eb34a4 100644 --- a/net/core/sock_diag.c +++ b/net/core/sock_diag.c @@ -171,8 +171,12 @@ EXPORT_SYMBOL_GPL(sock_diag_nlsk); static int __init sock_diag_init(void) { - sock_diag_nlsk = netlink_kernel_create(&init_net, NETLINK_SOCK_DIAG, 0, - sock_diag_rcv, NULL, THIS_MODULE); + struct netlink_kernel_cfg cfg = { + .input = sock_diag_rcv, + }; + + sock_diag_nlsk = netlink_kernel_create(&init_net, NETLINK_SOCK_DIAG, + THIS_MODULE, &cfg); return sock_diag_nlsk == NULL ? -ENOMEM : 0; } diff --git a/net/decnet/netfilter/dn_rtmsg.c b/net/decnet/netfilter/dn_rtmsg.c index b8f7f5b8c35..11db0ecf342 100644 --- a/net/decnet/netfilter/dn_rtmsg.c +++ b/net/decnet/netfilter/dn_rtmsg.c @@ -125,11 +125,13 @@ static struct nf_hook_ops dnrmg_ops __read_mostly = { static int __init dn_rtmsg_init(void) { int rv = 0; + struct netlink_kernel_cfg cfg = { + .groups = DNRNG_NLGRP_MAX, + .input = dnrmg_receive_user_skb, + }; dnrmg = netlink_kernel_create(&init_net, - NETLINK_DNRTMSG, DNRNG_NLGRP_MAX, - dnrmg_receive_user_skb, - NULL, THIS_MODULE); + NETLINK_DNRTMSG, THIS_MODULE, &cfg); if (dnrmg == NULL) { printk(KERN_ERR "dn_rtmsg: Cannot create netlink socket"); return -ENOMEM; diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c index ae528d1b293..3e11ea225da 100644 --- a/net/ipv4/fib_frontend.c +++ b/net/ipv4/fib_frontend.c @@ -976,8 +976,11 @@ static void nl_fib_input(struct sk_buff *skb) static int __net_init nl_fib_lookup_init(struct net *net) { struct sock *sk; - sk = netlink_kernel_create(net, NETLINK_FIB_LOOKUP, 0, - nl_fib_input, NULL, THIS_MODULE); + struct netlink_kernel_cfg cfg = { + .input = nl_fib_input, + }; + + sk = netlink_kernel_create(net, NETLINK_FIB_LOOKUP, THIS_MODULE, &cfg); if (sk == NULL) return -EAFNOSUPPORT; net->ipv4.fibnl = sk; diff --git a/net/ipv4/netfilter/ipt_ULOG.c b/net/ipv4/netfilter/ipt_ULOG.c index 99b3f53f16a..1109f7f6c25 100644 --- a/net/ipv4/netfilter/ipt_ULOG.c +++ b/net/ipv4/netfilter/ipt_ULOG.c @@ -381,6 +381,9 @@ static struct nf_logger ipt_ulog_logger __read_mostly = { static int __init ulog_tg_init(void) { int ret, i; + struct netlink_kernel_cfg cfg = { + .groups = ULOG_MAXNLGROUPS, + }; pr_debug("init module\n"); @@ -393,9 +396,8 @@ static int __init ulog_tg_init(void) for (i = 0; i < ULOG_MAXNLGROUPS; i++) setup_timer(&ulog_buffers[i].timer, ulog_timer, i); - nflognl = netlink_kernel_create(&init_net, - NETLINK_NFLOG, ULOG_MAXNLGROUPS, NULL, - NULL, THIS_MODULE); + nflognl = netlink_kernel_create(&init_net, NETLINK_NFLOG, + THIS_MODULE, &cfg); if (!nflognl) return -ENOMEM; diff --git a/net/netfilter/nfnetlink.c b/net/netfilter/nfnetlink.c index 3e797d1fcb9..700e4616a09 100644 --- a/net/netfilter/nfnetlink.c +++ b/net/netfilter/nfnetlink.c @@ -203,9 +203,12 @@ static void nfnetlink_rcv(struct sk_buff *skb) static int __net_init nfnetlink_net_init(struct net *net) { struct sock *nfnl; + struct netlink_kernel_cfg cfg = { + .groups = NFNLGRP_MAX, + .input = nfnetlink_rcv, + }; - nfnl = netlink_kernel_create(net, NETLINK_NETFILTER, NFNLGRP_MAX, - nfnetlink_rcv, NULL, THIS_MODULE); + nfnl = netlink_kernel_create(net, NETLINK_NETFILTER, THIS_MODULE, &cfg); if (!nfnl) return -ENOMEM; net->nfnl_stash = nfnl; diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c index b3025a603d5..43a124feaad 100644 --- a/net/netlink/af_netlink.c +++ b/net/netlink/af_netlink.c @@ -1503,14 +1503,16 @@ static void netlink_data_ready(struct sock *sk, int len) */ struct sock * -netlink_kernel_create(struct net *net, int unit, unsigned int groups, - void (*input)(struct sk_buff *skb), - struct mutex *cb_mutex, struct module *module) +netlink_kernel_create(struct net *net, int unit, + struct module *module, + struct netlink_kernel_cfg *cfg) { struct socket *sock; struct sock *sk; struct netlink_sock *nlk; struct listeners *listeners = NULL; + struct mutex *cb_mutex = cfg ? cfg->cb_mutex : NULL; + unsigned int groups; BUG_ON(!nl_table); @@ -1532,16 +1534,18 @@ netlink_kernel_create(struct net *net, int unit, unsigned int groups, sk = sock->sk; sk_change_net(sk, net); - if (groups < 32) + if (!cfg || cfg->groups < 32) groups = 32; + else + groups = cfg->groups; listeners = kzalloc(sizeof(*listeners) + NLGRPSZ(groups), GFP_KERNEL); if (!listeners) goto out_sock_release; sk->sk_data_ready = netlink_data_ready; - if (input) - nlk_sk(sk)->netlink_rcv = input; + if (cfg && cfg->input) + nlk_sk(sk)->netlink_rcv = cfg->input; if (netlink_insert(sk, net, 0)) goto out_sock_release; diff --git a/net/netlink/genetlink.c b/net/netlink/genetlink.c index 2cc7c1ee769..32761b53015 100644 --- a/net/netlink/genetlink.c +++ b/net/netlink/genetlink.c @@ -915,10 +915,14 @@ static struct genl_multicast_group notify_grp = { static int __net_init genl_pernet_init(struct net *net) { + struct netlink_kernel_cfg cfg = { + .input = genl_rcv, + .cb_mutex = &genl_mutex, + }; + /* we'll bump the group number right afterwards */ - net->genl_sock = netlink_kernel_create(net, NETLINK_GENERIC, 0, - genl_rcv, &genl_mutex, - THIS_MODULE); + net->genl_sock = netlink_kernel_create(net, NETLINK_GENERIC, + THIS_MODULE, &cfg); if (!net->genl_sock && net_eq(net, &init_net)) panic("GENL: Cannot initialize generic netlink\n"); diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c index 540762726aa..e75d8e47f35 100644 --- a/net/xfrm/xfrm_user.c +++ b/net/xfrm/xfrm_user.c @@ -2959,9 +2959,12 @@ static struct xfrm_mgr netlink_mgr = { static int __net_init xfrm_user_net_init(struct net *net) { struct sock *nlsk; + struct netlink_kernel_cfg cfg = { + .groups = XFRMNLGRP_MAX, + .input = xfrm_netlink_rcv, + }; - nlsk = netlink_kernel_create(net, NETLINK_XFRM, XFRMNLGRP_MAX, - xfrm_netlink_rcv, NULL, THIS_MODULE); + nlsk = netlink_kernel_create(net, NETLINK_XFRM, THIS_MODULE, &cfg); if (nlsk == NULL) return -ENOMEM; net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */ diff --git a/security/selinux/netlink.c b/security/selinux/netlink.c index 8a23a35b9c5..8a77725423e 100644 --- a/security/selinux/netlink.c +++ b/security/selinux/netlink.c @@ -111,8 +111,12 @@ void selnl_notify_policyload(u32 seqno) static int __init selnl_init(void) { + struct netlink_kernel_cfg cfg = { + .groups = SELNLGRP_MAX, + }; + selnl = netlink_kernel_create(&init_net, NETLINK_SELINUX, - SELNLGRP_MAX, NULL, NULL, THIS_MODULE); + THIS_MODULE, &cfg); if (selnl == NULL) panic("SELinux: Cannot create netlink socket."); netlink_set_nonroot(NETLINK_SELINUX, NL_NONROOT_RECV); -- cgit v1.2.3-70-g09d2 From 74a7f08448adea6cb47cd9b260c98ff168117e92 Mon Sep 17 00:00:00 2001 From: Grant Likely Date: Fri, 15 Jun 2012 11:50:25 -0600 Subject: devicetree: add helper inline for retrieving a node's full name The pattern (np ? np->full_name : "") is rather common in the kernel, but can also make for quite long lines. This patch adds a new inline function, of_node_full_name() so that the test for a valid node pointer doesn't need to be open coded at all call sites. Signed-off-by: Grant Likely Cc: Paul Mundt Cc: Benjamin Herrenschmidt Cc: Thomas Gleixner Signed-off-by: Rob Herring --- arch/microblaze/pci/pci-common.c | 6 ++---- arch/powerpc/kernel/pci-common.c | 6 ++---- arch/powerpc/kernel/vio.c | 5 ++--- arch/powerpc/platforms/cell/iommu.c | 3 +-- arch/powerpc/platforms/pseries/iommu.c | 2 +- arch/sparc/kernel/of_device_64.c | 2 +- drivers/of/base.c | 2 +- drivers/of/irq.c | 2 +- include/linux/of.h | 10 ++++++++++ kernel/irq/irqdomain.c | 8 ++++---- 10 files changed, 25 insertions(+), 21 deletions(-) (limited to 'kernel') diff --git a/arch/microblaze/pci/pci-common.c b/arch/microblaze/pci/pci-common.c index ed22bfc5db1..ca8f6e76996 100644 --- a/arch/microblaze/pci/pci-common.c +++ b/arch/microblaze/pci/pci-common.c @@ -249,8 +249,7 @@ int pci_read_irq_line(struct pci_dev *pci_dev) } else { pr_debug(" Got one, spec %d cells (0x%08x 0x%08x...) on %s\n", oirq.size, oirq.specifier[0], oirq.specifier[1], - oirq.controller ? oirq.controller->full_name : - ""); + of_node_full_name(oirq.controller)); virq = irq_create_of_mapping(oirq.controller, oirq.specifier, oirq.size); @@ -1493,8 +1492,7 @@ static void __devinit pcibios_scan_phb(struct pci_controller *hose) struct pci_bus *bus; struct device_node *node = hose->dn; - pr_debug("PCI: Scanning PHB %s\n", - node ? node->full_name : ""); + pr_debug("PCI: Scanning PHB %s\n", of_node_full_name(node)); pcibios_setup_phb_resources(hose, &resources); diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c index 8e78e93c818..886c254fd56 100644 --- a/arch/powerpc/kernel/pci-common.c +++ b/arch/powerpc/kernel/pci-common.c @@ -248,8 +248,7 @@ static int pci_read_irq_line(struct pci_dev *pci_dev) } else { pr_debug(" Got one, spec %d cells (0x%08x 0x%08x...) on %s\n", oirq.size, oirq.specifier[0], oirq.specifier[1], - oirq.controller ? oirq.controller->full_name : - ""); + of_node_full_name(oirq.controller)); virq = irq_create_of_mapping(oirq.controller, oirq.specifier, oirq.size); @@ -1628,8 +1627,7 @@ void __devinit pcibios_scan_phb(struct pci_controller *hose) struct device_node *node = hose->dn; int mode; - pr_debug("PCI: Scanning PHB %s\n", - node ? node->full_name : ""); + pr_debug("PCI: Scanning PHB %s\n", of_node_full_name(node)); /* Get some IO space for the new PHB */ pcibios_setup_phb_io_space(hose); diff --git a/arch/powerpc/kernel/vio.c b/arch/powerpc/kernel/vio.c index cb87301ccd5..63f72ede434 100644 --- a/arch/powerpc/kernel/vio.c +++ b/arch/powerpc/kernel/vio.c @@ -1296,8 +1296,7 @@ static void __devinit vio_dev_release(struct device *dev) struct iommu_table *tbl = get_iommu_table_base(dev); if (tbl) - iommu_free_table(tbl, dev->of_node ? - dev->of_node->full_name : dev_name(dev)); + iommu_free_table(tbl, of_node_full_name(dev->of_node)); of_node_put(dev->of_node); kfree(to_vio_dev(dev)); } @@ -1509,7 +1508,7 @@ static ssize_t devspec_show(struct device *dev, { struct device_node *of_node = dev->of_node; - return sprintf(buf, "%s\n", of_node ? of_node->full_name : "none"); + return sprintf(buf, "%s\n", of_node_full_name(of_node)); } static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, diff --git a/arch/powerpc/platforms/cell/iommu.c b/arch/powerpc/platforms/cell/iommu.c index b9f509a34c0..b6732004c88 100644 --- a/arch/powerpc/platforms/cell/iommu.c +++ b/arch/powerpc/platforms/cell/iommu.c @@ -552,8 +552,7 @@ static struct iommu_table *cell_get_iommu_table(struct device *dev) iommu = cell_iommu_for_node(dev_to_node(dev)); if (iommu == NULL || list_empty(&iommu->windows)) { printk(KERN_ERR "iommu: missing iommu for %s (node %d)\n", - dev->of_node ? dev->of_node->full_name : "?", - dev_to_node(dev)); + of_node_full_name(dev->of_node), dev_to_node(dev)); return NULL; } window = list_entry(iommu->windows.next, struct iommu_window, list); diff --git a/arch/powerpc/platforms/pseries/iommu.c b/arch/powerpc/platforms/pseries/iommu.c index 2d311c0caf8..6b58a395dff 100644 --- a/arch/powerpc/platforms/pseries/iommu.c +++ b/arch/powerpc/platforms/pseries/iommu.c @@ -1051,7 +1051,7 @@ static void pci_dma_dev_setup_pSeriesLP(struct pci_dev *dev) if (!pdn || !PCI_DN(pdn)) { printk(KERN_WARNING "pci_dma_dev_setup_pSeriesLP: " "no DMA window found for pci dev=%s dn=%s\n", - pci_name(dev), dn? dn->full_name : ""); + pci_name(dev), of_node_full_name(dn)); return; } pr_debug(" parent is %s\n", pdn->full_name); diff --git a/arch/sparc/kernel/of_device_64.c b/arch/sparc/kernel/of_device_64.c index 7a3be6f6737..7bbdc26d951 100644 --- a/arch/sparc/kernel/of_device_64.c +++ b/arch/sparc/kernel/of_device_64.c @@ -580,7 +580,7 @@ static unsigned int __init build_one_device_irq(struct platform_device *op, printk("%s: Apply [%s:%x] imap --> [%s:%x]\n", op->dev.of_node->full_name, pp->full_name, this_orig_irq, - (iret ? iret->full_name : "NULL"), irq); + of_node_full_name(iret), irq); if (!iret) break; diff --git a/drivers/of/base.c b/drivers/of/base.c index 85757952f12..9ec0a2f1b02 100644 --- a/drivers/of/base.c +++ b/drivers/of/base.c @@ -1173,7 +1173,7 @@ static void of_alias_add(struct alias_prop *ap, struct device_node *np, ap->stem[stem_len] = 0; list_add_tail(&ap->link, &aliases_lookup); pr_debug("adding DT alias:%s: stem=%s id=%i node=%s\n", - ap->alias, ap->stem, ap->id, np ? np->full_name : NULL); + ap->alias, ap->stem, ap->id, of_node_full_name(np)); } /** diff --git a/drivers/of/irq.c b/drivers/of/irq.c index 9cf00602f56..ff8ab7b2737 100644 --- a/drivers/of/irq.c +++ b/drivers/of/irq.c @@ -255,7 +255,7 @@ int of_irq_map_raw(struct device_node *parent, const __be32 *intspec, skiplevel: /* Iterate again with new parent */ - pr_debug(" -> new parent: %s\n", newpar ? newpar->full_name : "<>"); + pr_debug(" -> new parent: %s\n", of_node_full_name(newpar)); of_node_put(ipar); ipar = newpar; newpar = NULL; diff --git a/include/linux/of.h b/include/linux/of.h index 2ec1083af7f..1012377cae9 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -163,6 +163,11 @@ static inline int of_node_to_nid(struct device_node *np) { return -1; } #define of_node_to_nid of_node_to_nid #endif +static inline const char* of_node_full_name(struct device_node *np) +{ + return np ? np->full_name : ""; +} + extern struct device_node *of_find_node_by_name(struct device_node *from, const char *name); #define for_each_node_by_name(dn, name) \ @@ -303,6 +308,11 @@ const char *of_prop_next_string(struct property *prop, const char *cur); #else /* CONFIG_OF */ +static inline const char* of_node_full_name(struct device_node *np) +{ + return ""; +} + static inline bool of_have_populated_dt(void) { return false; diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c index 41c1564103f..38c5eb839c9 100644 --- a/kernel/irq/irqdomain.c +++ b/kernel/irq/irqdomain.c @@ -448,7 +448,7 @@ unsigned int irq_create_mapping(struct irq_domain *domain, } pr_debug("irq %lu on domain %s mapped to virtual irq %u\n", - hwirq, domain->of_node ? domain->of_node->full_name : "null", virq); + hwirq, of_node_full_name(domain->of_node), virq); return virq; } @@ -477,7 +477,7 @@ unsigned int irq_create_of_mapping(struct device_node *controller, return intspec[0]; #endif pr_warning("no irq domain found for %s !\n", - controller->full_name); + of_node_full_name(controller)); return 0; } @@ -725,8 +725,8 @@ static int virq_debug_show(struct seq_file *m, void *private) data = irq_desc_get_chip_data(desc); seq_printf(m, data ? "0x%p " : " %p ", data); - if (desc->irq_data.domain && desc->irq_data.domain->of_node) - p = desc->irq_data.domain->of_node->full_name; + if (desc->irq_data.domain) + p = of_node_full_name(desc->irq_data.domain->of_node); else p = none; seq_printf(m, "%s\n", p); -- cgit v1.2.3-70-g09d2