[05/39] ipv{4,6}/udp{,lite}: simplify proc registration

Message ID	20180419124140.9309-6-hch@lst.de (mailing list archive)
State	Not Applicable
Headers	show Return-Path: <linux-scsi-owner@kernel.org> From: Christoph Hellwig <hch@lst.de> To: Andrew Morton <akpm@linux-foundation.org>, Alexander Viro <viro@zeniv.linux.org.uk> Cc: Alexey Dobriyan <adobriyan@gmail.com>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Jiri Slaby <jslaby@suse.com>, Corey Minyard <minyard@acm.org>, Alessandro Zummo <a.zummo@towertech.it>, Alexandre Belloni <alexandre.belloni@bootlin.com>, linux-acpi@vger.kernel.org, drbd-dev@lists.linbit.com, linux-ide@vger.kernel.org, netdev@vger.kernel.org, linux-rtc@vger.kernel.org, megaraidlinux.pdl@broadcom.com, linux-scsi@vger.kernel.org, devel@driverdev.osuosl.org, linux-afs@lists.infradead.org, linux-ext4@vger.kernel.org, jfs-discussion@lists.sourceforge.net, netfilter-devel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 05/39] ipv{4,6}/udp{,lite}: simplify proc registration Date: Thu, 19 Apr 2018 14:41:06 +0200 Message-Id: <20180419124140.9309-6-hch@lst.de> In-Reply-To: <20180419124140.9309-1-hch@lst.de> References: <20180419124140.9309-1-hch@lst.de> Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk

diff --git a/include/net/udp.h b/include/net/udp.h index 0676b272f6ac..093cd323f66a 100644 --- a/include/net/udp.h +++ b/include/net/udp.h @@ -408,31 +408,27 @@ do { \ #define __UDPX_INC_STATS(sk, field) __UDP_INC_STATS(sock_net(sk), field, 0) #endif -/* /proc */ -int udp_seq_open(struct inode *inode, struct file *file); - +#ifdef CONFIG_PROC_FS struct udp_seq_afinfo { - char *name; sa_family_t family; struct udp_table *udp_table; - const struct file_operations *seq_fops; - struct seq_operations seq_ops; }; struct udp_iter_state { struct seq_net_private p; - sa_family_t family; int bucket; - struct udp_table *udp_table; }; -#ifdef CONFIG_PROC_FS -int udp_proc_register(struct net *net, struct udp_seq_afinfo *afinfo); -void udp_proc_unregister(struct net *net, struct udp_seq_afinfo *afinfo); +void *udp_seq_start(struct seq_file *seq, loff_t *pos); +void *udp_seq_next(struct seq_file *seq, void *v, loff_t *pos); +void udp_seq_stop(struct seq_file *seq, void *v); + +extern const struct file_operations udp_afinfo_seq_fops; +extern const struct file_operations udp6_afinfo_seq_fops; int udp4_proc_init(void); void udp4_proc_exit(void); -#endif +#endif /* CONFIG_PROC_FS */ int udpv4_offload_init(void); diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c index 24b5c59b1c53..d48790ddb6cf 100644 --- a/net/ipv4/udp.c +++ b/net/ipv4/udp.c @@ -2579,12 +2579,13 @@ EXPORT_SYMBOL(udp_prot); static struct sock *udp_get_first(struct seq_file *seq, int start) { struct sock *sk; + struct udp_seq_afinfo *afinfo = PDE_DATA(file_inode(seq->file)); struct udp_iter_state *state = seq->private; struct net *net = seq_file_net(seq); - for (state->bucket = start; state->bucket <= state->udp_table->mask; + for (state->bucket = start; state->bucket <= afinfo->udp_table->mask; ++state->bucket) { - struct udp_hslot *hslot = &state->udp_table->hash[state->bucket]; + struct udp_hslot *hslot = &afinfo->udp_table->hash[state->bucket]; if (hlist_empty(&hslot->head)) continue; @@ -2593,7 +2594,7 @@ static struct sock *udp_get_first(struct seq_file *seq, int start) sk_for_each(sk, &hslot->head) { if (!net_eq(sock_net(sk), net)) continue; - if (sk->sk_family == state->family) + if (sk->sk_family == afinfo->family) goto found; } spin_unlock_bh(&hslot->lock); @@ -2605,16 +2606,17 @@ static struct sock *udp_get_first(struct seq_file *seq, int start) static struct sock *udp_get_next(struct seq_file *seq, struct sock *sk) { + struct udp_seq_afinfo *afinfo = PDE_DATA(file_inode(seq->file)); struct udp_iter_state *state = seq->private; struct net *net = seq_file_net(seq); do { sk = sk_next(sk); - } while (sk && (!net_eq(sock_net(sk), net) || sk->sk_family != state->family)); + } while (sk && (!net_eq(sock_net(sk), net) || sk->sk_family != afinfo->family)); if (!sk) { - if (state->bucket <= state->udp_table->mask) - spin_unlock_bh(&state->udp_table->hash[state->bucket].lock); + if (state->bucket <= afinfo->udp_table->mask) + spin_unlock_bh(&afinfo->udp_table->hash[state->bucket].lock); return udp_get_first(seq, state->bucket + 1); } return sk; @@ -2630,15 +2632,16 @@ static struct sock *udp_get_idx(struct seq_file *seq, loff_t pos) return pos ? NULL : sk; } -static void *udp_seq_start(struct seq_file *seq, loff_t *pos) +void *udp_seq_start(struct seq_file *seq, loff_t *pos) { struct udp_iter_state *state = seq->private; state->bucket = MAX_UDP_PORTS; return *pos ? udp_get_idx(seq, *pos-1) : SEQ_START_TOKEN; } +EXPORT_SYMBOL(udp_seq_start); -static void *udp_seq_next(struct seq_file *seq, void *v, loff_t *pos) +void *udp_seq_next(struct seq_file *seq, void *v, loff_t *pos) { struct sock *sk; @@ -2650,56 +2653,17 @@ static void *udp_seq_next(struct seq_file *seq, void *v, loff_t *pos) ++*pos; return sk; } +EXPORT_SYMBOL(udp_seq_next); -static void udp_seq_stop(struct seq_file *seq, void *v) +void udp_seq_stop(struct seq_file *seq, void *v) { + struct udp_seq_afinfo *afinfo = PDE_DATA(file_inode(seq->file)); struct udp_iter_state *state = seq->private; - if (state->bucket <= state->udp_table->mask) - spin_unlock_bh(&state->udp_table->hash[state->bucket].lock); + if (state->bucket <= afinfo->udp_table->mask) + spin_unlock_bh(&afinfo->udp_table->hash[state->bucket].lock); } - -int udp_seq_open(struct inode *inode, struct file *file) -{ - struct udp_seq_afinfo *afinfo = PDE_DATA(inode); - struct udp_iter_state *s; - int err; - - err = seq_open_net(inode, file, &afinfo->seq_ops, - sizeof(struct udp_iter_state)); - if (err < 0) - return err; - - s = ((struct seq_file *)file->private_data)->private; - s->family = afinfo->family; - s->udp_table = afinfo->udp_table; - return err; -} -EXPORT_SYMBOL(udp_seq_open); - -/* ------------------------------------------------------------------------ */ -int udp_proc_register(struct net *net, struct udp_seq_afinfo *afinfo) -{ - struct proc_dir_entry *p; - int rc = 0; - - afinfo->seq_ops.start = udp_seq_start; - afinfo->seq_ops.next = udp_seq_next; - afinfo->seq_ops.stop = udp_seq_stop; - - p = proc_create_data(afinfo->name, 0444, net->proc_net, - afinfo->seq_fops, afinfo); - if (!p) - rc = -ENOMEM; - return rc; -} -EXPORT_SYMBOL(udp_proc_register); - -void udp_proc_unregister(struct net *net, struct udp_seq_afinfo *afinfo) -{ - remove_proc_entry(afinfo->name, net->proc_net); -} -EXPORT_SYMBOL(udp_proc_unregister); +EXPORT_SYMBOL(udp_seq_stop); /* ------------------------------------------------------------------------ */ static void udp4_format_sock(struct sock *sp, struct seq_file *f, @@ -2739,32 +2703,43 @@ int udp4_seq_show(struct seq_file *seq, void *v) return 0; } -static const struct file_operations udp_afinfo_seq_fops = { +static const struct seq_operations udp_seq_ops = { + .start = udp_seq_start, + .next = udp_seq_next, + .stop = udp_seq_stop, + .show = udp4_seq_show, +}; + +static int udp_seq_open(struct inode *inode, struct file *file) +{ + return seq_open_net(inode, file, &udp_seq_ops, + sizeof(struct udp_iter_state)); +} + +const struct file_operations udp_afinfo_seq_fops = { .open = udp_seq_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release_net }; +EXPORT_SYMBOL(udp_afinfo_seq_fops); -/* ------------------------------------------------------------------------ */ static struct udp_seq_afinfo udp4_seq_afinfo = { - .name = "udp", .family = AF_INET, .udp_table = &udp_table, - .seq_fops = &udp_afinfo_seq_fops, - .seq_ops = { - .show = udp4_seq_show, - }, }; static int __net_init udp4_proc_init_net(struct net *net) { - return udp_proc_register(net, &udp4_seq_afinfo); + if (!proc_create_data("udp", 0444, net->proc_net, &udp_afinfo_seq_fops, + &udp4_seq_afinfo)) + return -ENOMEM; + return 0; } static void __net_exit udp4_proc_exit_net(struct net *net) { - udp_proc_unregister(net, &udp4_seq_afinfo); + remove_proc_entry("udp", net->proc_net); } static struct pernet_operations udp4_net_ops = { diff --git a/net/ipv4/udplite.c b/net/ipv4/udplite.c index f96614e9b9a5..4a6e67bfbe0d 100644 --- a/net/ipv4/udplite.c +++ b/net/ipv4/udplite.c @@ -14,6 +14,7 @@ #define pr_fmt(fmt) "UDPLite: " fmt #include <linux/export.h> +#include <linux/proc_fs.h> #include "udp_impl.h" struct udp_table udplite_table __read_mostly; @@ -73,32 +74,22 @@ static struct inet_protosw udplite4_protosw = { }; #ifdef CONFIG_PROC_FS - -static const struct file_operations udplite_afinfo_seq_fops = { - .open = udp_seq_open, - .read = seq_read, - .llseek = seq_lseek, - .release = seq_release_net -}; - static struct udp_seq_afinfo udplite4_seq_afinfo = { - .name = "udplite", .family = AF_INET, .udp_table = &udplite_table, - .seq_fops = &udplite_afinfo_seq_fops, - .seq_ops = { - .show = udp4_seq_show, - }, }; static int __net_init udplite4_proc_init_net(struct net *net) { - return udp_proc_register(net, &udplite4_seq_afinfo); + if (!proc_create_data("udplite", 0444, net->proc_net, + &udp_afinfo_seq_fops, &udplite4_seq_afinfo)) + return -ENOMEM; + return 0; } static void __net_exit udplite4_proc_exit_net(struct net *net) { - udp_proc_unregister(net, &udplite4_seq_afinfo); + remove_proc_entry("udplite", net->proc_net); } static struct pernet_operations udplite4_net_ops = { diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c index 4ec76a87aeb8..68f11d6e3912 100644 --- a/net/ipv6/udp.c +++ b/net/ipv6/udp.c @@ -1480,31 +1480,43 @@ int udp6_seq_show(struct seq_file *seq, void *v) return 0; } -static const struct file_operations udp6_afinfo_seq_fops = { - .open = udp_seq_open, +static const struct seq_operations udp6_seq_ops = { + .start = udp_seq_start, + .next = udp_seq_next, + .stop = udp_seq_stop, + .show = udp6_seq_show, +}; + +static int udp6_seq_open(struct inode *inode, struct file *file) +{ + return seq_open_net(inode, file, &udp6_seq_ops, + sizeof(struct udp_iter_state)); +} + +const struct file_operations udp6_afinfo_seq_fops = { + .open = udp6_seq_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release_net }; +EXPORT_SYMBOL(udp6_afinfo_seq_fops); static struct udp_seq_afinfo udp6_seq_afinfo = { - .name = "udp6", .family = AF_INET6, .udp_table = &udp_table, - .seq_fops = &udp6_afinfo_seq_fops, - .seq_ops = { - .show = udp6_seq_show, - }, }; int __net_init udp6_proc_init(struct net *net) { - return udp_proc_register(net, &udp6_seq_afinfo); + if (!proc_create_data("udp6", 0444, net->proc_net, + &udp6_afinfo_seq_fops, &udp6_seq_afinfo)) + return -ENOMEM; + return 0; } void udp6_proc_exit(struct net *net) { - udp_proc_unregister(net, &udp6_seq_afinfo); + remove_proc_entry("udp6", net->proc_net); } #endif /* CONFIG_PROC_FS */ diff --git a/net/ipv6/udplite.c b/net/ipv6/udplite.c index 14ae32bb1f3d..a119e57196b5 100644 --- a/net/ipv6/udplite.c +++ b/net/ipv6/udplite.c @@ -12,6 +12,7 @@ * 2 of the License, or (at your option) any later version. */ #include <linux/export.h> +#include <linux/proc_fs.h> #include "udp_impl.h" static int udplitev6_rcv(struct sk_buff *skb) @@ -92,32 +93,22 @@ void udplitev6_exit(void) } #ifdef CONFIG_PROC_FS - -static const struct file_operations udplite6_afinfo_seq_fops = { - .open = udp_seq_open, - .read = seq_read, - .llseek = seq_lseek, - .release = seq_release_net -}; - static struct udp_seq_afinfo udplite6_seq_afinfo = { - .name = "udplite6", .family = AF_INET6, .udp_table = &udplite_table, - .seq_fops = &udplite6_afinfo_seq_fops, - .seq_ops = { - .show = udp6_seq_show, - }, }; static int __net_init udplite6_proc_init_net(struct net *net) { - return udp_proc_register(net, &udplite6_seq_afinfo); + if (!proc_create_data("udplite6", 0444, net->proc_net, + &udp6_afinfo_seq_fops, &udplite6_seq_afinfo)) + return -ENOMEM; + return 0; } static void __net_exit udplite6_proc_exit_net(struct net *net) { - udp_proc_unregister(net, &udplite6_seq_afinfo); + remove_proc_entry("udplite6", net->proc_net); } static struct pernet_operations udplite6_net_ops = {

[05/39] ipv{4,6}/udp{,lite}: simplify proc registration

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