[NETFILTER]: Replate direct proc_fops assignment with proc_create call.

This elliminates infamous race during module loading when one could lookup
proc entry without proc_fops assigned.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 files changed, 30 insertions, 59 deletions

diff --git a/net/ipv4/netfilter/ip_queue.c b/net/ipv4/netfilter/ip_queue.c
index fe05da41d6ba..4dc162894cb2 100644
--- a/net/ipv4/netfilter/ip_queue.c
+++ b/net/ipv4/netfilter/ip_queue.c
@@ -588,11 +588,9 @@ static int __init ip_queue_init(void)
         }
 
 #ifdef CONFIG_PROC_FS
-        proc = create_proc_entry(IPQ_PROC_FS_NAME, 0, init_net.proc_net);
-        if (proc) {
-                proc->owner = THIS_MODULE;
-                proc->proc_fops = &ip_queue_proc_fops;
-        } else {
+        proc = proc_create(IPQ_PROC_FS_NAME, 0, init_net.proc_net,
+                           &ip_queue_proc_fops);
+        if (!proc) {
                 printk(KERN_ERR "ip_queue: failed to create proc entry\n");
                 goto cleanup_ipqnl;
         }
diff --git a/net/ipv4/netfilter/ipt_CLUSTERIP.c b/net/ipv4/netfilter/ipt_CLUSTERIP.c
index c6cf84c77611..52926c8e3cc1 100644
--- a/net/ipv4/netfilter/ipt_CLUSTERIP.c
+++ b/net/ipv4/netfilter/ipt_CLUSTERIP.c
@@ -167,14 +167,13 @@ clusterip_config_init(struct ipt_clusterip_tgt_info *i, __be32 ip,
 
                 /* create proc dir entry */
                 sprintf(buffer, "%u.%u.%u.%u", NIPQUAD(ip));
-                c->pde = create_proc_entry(buffer, S_IWUSR|S_IRUSR,
-                                           clusterip_procdir);
+                c->pde = proc_create(buffer, S_IWUSR|S_IRUSR,
+                                     clusterip_procdir, &clusterip_proc_fops);
                 if (!c->pde) {
                         kfree(c);
                         return NULL;
                 }
         }
-        c->pde->proc_fops = &clusterip_proc_fops;
         c->pde->data = c;
 #endif
 
diff --git a/net/ipv4/netfilter/ipt_recent.c b/net/ipv4/netfilter/ipt_recent.c
index 8e8f0425a8ed..50e06690eb5b 100644
--- a/net/ipv4/netfilter/ipt_recent.c
+++ b/net/ipv4/netfilter/ipt_recent.c
@@ -276,12 +276,11 @@ recent_mt_check(const char *tablename, const void *ip,
         for (i = 0; i < ip_list_hash_size; i++)
                 INIT_LIST_HEAD(&t->iphash[i]);
 #ifdef CONFIG_PROC_FS
-        t->proc = create_proc_entry(t->name, ip_list_perms, proc_dir);
+        t->proc = proc_create(t->name, ip_list_perms, proc_dir, &recent_fops);
         if (t->proc == NULL) {
                 kfree(t);
                 goto out;
         }
-        t->proc->proc_fops = &recent_fops;
         t->proc->uid       = ip_list_uid;
         t->proc->gid       = ip_list_gid;
         t->proc->data      = t;
diff --git a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4_compat.c b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4_compat.c
index 089252e82c01..f500b0fdaef4 100644
--- a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4_compat.c
+++ b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4_compat.c
@@ -395,13 +395,10 @@ int __init nf_conntrack_ipv4_compat_init(void)
         if (!proc_exp)
                 goto err2;
 
-        proc_stat = create_proc_entry("ip_conntrack", S_IRUGO, init_net.proc_net_stat);
+        proc_stat = proc_create("ip_conntrack", S_IRUGO,
+                                init_net.proc_net_stat, &ct_cpu_seq_fops);
         if (!proc_stat)
                 goto err3;
-
-        proc_stat->proc_fops = &ct_cpu_seq_fops;
-        proc_stat->owner = THIS_MODULE;
-
         return 0;
 
 err3:
diff --git a/net/ipv6/netfilter/ip6_queue.c b/net/ipv6/netfilter/ip6_queue.c
index cc2f9afcf808..8d366f7f2a9a 100644
--- a/net/ipv6/netfilter/ip6_queue.c
+++ b/net/ipv6/netfilter/ip6_queue.c
@@ -591,11 +591,9 @@ static int __init ip6_queue_init(void)
         }
 
 #ifdef CONFIG_PROC_FS
-        proc = create_proc_entry(IPQ_PROC_FS_NAME, 0, init_net.proc_net);
-        if (proc) {
-                proc->owner = THIS_MODULE;
-                proc->proc_fops = &ip6_queue_proc_fops;
-        } else {
+        proc = proc_create(IPQ_PROC_FS_NAME, 0, init_net.proc_net,
+                           &ip6_queue_proc_fops);
+        if (!proc) {
                 printk(KERN_ERR "ip6_queue: failed to create proc entry\n");
                 goto cleanup_ipqnl;
         }
diff --git a/net/netfilter/nf_conntrack_standalone.c b/net/netfilter/nf_conntrack_standalone.c
index e88e96af613d..8599068050ec 100644
--- a/net/netfilter/nf_conntrack_standalone.c
+++ b/net/netfilter/nf_conntrack_standalone.c
@@ -395,7 +395,7 @@ EXPORT_SYMBOL_GPL(nf_ct_log_invalid);
 static int __init nf_conntrack_standalone_init(void)
 {
 #ifdef CONFIG_PROC_FS
-        struct proc_dir_entry *proc, *proc_stat;
+        struct proc_dir_entry *proc;
 #endif
         int ret = 0;
 
@@ -407,12 +407,9 @@ static int __init nf_conntrack_standalone_init(void)
         proc = proc_net_fops_create(&init_net, "nf_conntrack", 0440, &ct_file_ops);
         if (!proc) goto cleanup_init;
 
-        proc_stat = create_proc_entry("nf_conntrack", S_IRUGO, init_net.proc_net_stat);
-        if (!proc_stat)
+        if (!proc_create("nf_conntrack", S_IRUGO,
+                         init_net.proc_net_stat, &ct_cpu_seq_fops))
                 goto cleanup_proc;
-
-        proc_stat->proc_fops = &ct_cpu_seq_fops;
-        proc_stat->owner = THIS_MODULE;
 #endif
 #ifdef CONFIG_SYSCTL
         nf_ct_sysctl_header = register_sysctl_paths(nf_ct_path,
diff --git a/net/netfilter/nf_log.c b/net/netfilter/nf_log.c
index cec9976aecbf..bc11d7092032 100644
--- a/net/netfilter/nf_log.c
+++ b/net/netfilter/nf_log.c
@@ -168,13 +168,9 @@ static const struct file_operations nflog_file_ops = {
 int __init netfilter_log_init(void)
 {
 #ifdef CONFIG_PROC_FS
-        struct proc_dir_entry *pde;
-
-        pde = create_proc_entry("nf_log", S_IRUGO, proc_net_netfilter);
-        if (!pde)
+        if (!proc_create("nf_log", S_IRUGO,
+                         proc_net_netfilter, &nflog_file_ops))
                 return -1;
-
-        pde->proc_fops = &nflog_file_ops;
 #endif
         return 0;
 }
diff --git a/net/netfilter/nf_queue.c b/net/netfilter/nf_queue.c
index ddc80ea114cd..bbd26893c0c4 100644
--- a/net/netfilter/nf_queue.c
+++ b/net/netfilter/nf_queue.c
@@ -348,12 +348,9 @@ static const struct file_operations nfqueue_file_ops = {
 int __init netfilter_queue_init(void)
 {
 #ifdef CONFIG_PROC_FS
-        struct proc_dir_entry *pde;
-
-        pde = create_proc_entry("nf_queue", S_IRUGO, proc_net_netfilter);
-        if (!pde)
+        if (!proc_create("nf_queue", S_IRUGO,
+                         proc_net_netfilter, &nfqueue_file_ops))
                 return -1;
-        pde->proc_fops = &nfqueue_file_ops;
 #endif
         return 0;
 }
diff --git a/net/netfilter/nfnetlink_log.c b/net/netfilter/nfnetlink_log.c
index bf3f19b21fe4..b8173af8c24a 100644
--- a/net/netfilter/nfnetlink_log.c
+++ b/net/netfilter/nfnetlink_log.c
@@ -923,9 +923,6 @@ static const struct file_operations nful_file_ops = {
 static int __init nfnetlink_log_init(void)
 {
         int i, status = -ENOMEM;
-#ifdef CONFIG_PROC_FS
-        struct proc_dir_entry *proc_nful;
-#endif
 
         for (i = 0; i < INSTANCE_BUCKETS; i++)
                 INIT_HLIST_HEAD(&instance_table[i]);
@@ -943,11 +940,9 @@ static int __init nfnetlink_log_init(void)
         }
 
 #ifdef CONFIG_PROC_FS
-        proc_nful = create_proc_entry("nfnetlink_log", 0440,
-                                      proc_net_netfilter);
-        if (!proc_nful)
+        if (!proc_create("nfnetlink_log", 0440,
+                         proc_net_netfilter, &nful_file_ops))
                 goto cleanup_subsys;
-        proc_nful->proc_fops = &nful_file_ops;
 #endif
         return status;
 
diff --git a/net/netfilter/nfnetlink_queue.c b/net/netfilter/nfnetlink_queue.c
index 012cb6910820..10522c04ed24 100644
--- a/net/netfilter/nfnetlink_queue.c
+++ b/net/netfilter/nfnetlink_queue.c
@@ -896,9 +896,6 @@ static const struct file_operations nfqnl_file_ops = {
 static int __init nfnetlink_queue_init(void)
 {
         int i, status = -ENOMEM;
-#ifdef CONFIG_PROC_FS
-        struct proc_dir_entry *proc_nfqueue;
-#endif
 
         for (i = 0; i < INSTANCE_BUCKETS; i++)
                 INIT_HLIST_HEAD(&instance_table[i]);
@@ -911,11 +908,9 @@ static int __init nfnetlink_queue_init(void)
         }
 
 #ifdef CONFIG_PROC_FS
-        proc_nfqueue = create_proc_entry("nfnetlink_queue", 0440,
-                                         proc_net_netfilter);
-        if (!proc_nfqueue)
+        if (!proc_create("nfnetlink_queue", 0440,
+                         proc_net_netfilter, &nfqnl_file_ops))
                 goto cleanup_subsys;
-        proc_nfqueue->proc_fops = &nfqnl_file_ops;
 #endif
 
         register_netdevice_notifier(&nfqnl_dev_notifier);
diff --git a/net/netfilter/xt_hashlimit.c b/net/netfilter/xt_hashlimit.c
index 5418ce59ac3a..dc29007c52cd 100644
--- a/net/netfilter/xt_hashlimit.c
+++ b/net/netfilter/xt_hashlimit.c
@@ -237,14 +237,14 @@ static int htable_create_v0(struct xt_hashlimit_info *minfo, int family)
         hinfo->family = family;
         hinfo->rnd_initialized = 0;
         spin_lock_init(&hinfo->lock);
-        hinfo->pde = create_proc_entry(minfo->name, 0,
-                                       family == AF_INET ? hashlimit_procdir4 :
-                                                           hashlimit_procdir6);
+        hinfo->pde = proc_create(minfo->name, 0,
+                                 family == AF_INET ? hashlimit_procdir4 :
+                                                     hashlimit_procdir6,
+                                 &dl_file_ops);
         if (!hinfo->pde) {
                 vfree(hinfo);
                 return -1;
         }
-        hinfo->pde->proc_fops = &dl_file_ops;
         hinfo->pde->data = hinfo;
 
         setup_timer(&hinfo->timer, htable_gc, (unsigned long )hinfo);
@@ -301,14 +301,14 @@ static int htable_create(struct xt_hashlimit_mtinfo1 *minfo,
         hinfo->rnd_initialized = 0;
         spin_lock_init(&hinfo->lock);
 
-        hinfo->pde = create_proc_entry(minfo->name, 0,
-                                       family == AF_INET ? hashlimit_procdir4 :
-                                                           hashlimit_procdir6);
+        hinfo->pde = proc_create(minfo->name, 0,
+                                 family == AF_INET ? hashlimit_procdir4 :
+                                                     hashlimit_procdir6,
+                                 &dl_file_ops);
         if (hinfo->pde == NULL) {
                 vfree(hinfo);
                 return -1;
         }
-        hinfo->pde->proc_fops = &dl_file_ops;
         hinfo->pde->data = hinfo;
 
         setup_timer(&hinfo->timer, htable_gc, (unsigned long)hinfo);