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3617d9496c
Variant of proc_create_data that directly take a seq_file show
callback and deals with network namespaces in ->open and ->release.
All callers of proc_create + single_open_net converted over, and
single_{open,release}_net are removed entirely.
Signed-off-by: Christoph Hellwig <hch@lst.de>
387 lines
8.7 KiB
C
387 lines
8.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/in.h>
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#include <linux/inet.h>
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#include <linux/list.h>
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#include <linux/module.h>
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#include <linux/net.h>
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#include <linux/proc_fs.h>
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#include <linux/rculist.h>
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#include <linux/seq_file.h>
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#include <linux/socket.h>
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#include <net/inet_sock.h>
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#include <net/kcm.h>
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#include <net/net_namespace.h>
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#include <net/netns/generic.h>
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#include <net/tcp.h>
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#ifdef CONFIG_PROC_FS
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static struct kcm_mux *kcm_get_first(struct seq_file *seq)
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{
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struct net *net = seq_file_net(seq);
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struct kcm_net *knet = net_generic(net, kcm_net_id);
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return list_first_or_null_rcu(&knet->mux_list,
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struct kcm_mux, kcm_mux_list);
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}
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static struct kcm_mux *kcm_get_next(struct kcm_mux *mux)
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{
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struct kcm_net *knet = mux->knet;
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return list_next_or_null_rcu(&knet->mux_list, &mux->kcm_mux_list,
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struct kcm_mux, kcm_mux_list);
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}
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static struct kcm_mux *kcm_get_idx(struct seq_file *seq, loff_t pos)
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{
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struct net *net = seq_file_net(seq);
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struct kcm_net *knet = net_generic(net, kcm_net_id);
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struct kcm_mux *m;
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list_for_each_entry_rcu(m, &knet->mux_list, kcm_mux_list) {
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if (!pos)
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return m;
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--pos;
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}
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return NULL;
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}
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static void *kcm_seq_next(struct seq_file *seq, void *v, loff_t *pos)
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{
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void *p;
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if (v == SEQ_START_TOKEN)
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p = kcm_get_first(seq);
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else
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p = kcm_get_next(v);
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++*pos;
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return p;
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}
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static void *kcm_seq_start(struct seq_file *seq, loff_t *pos)
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__acquires(rcu)
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{
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rcu_read_lock();
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if (!*pos)
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return SEQ_START_TOKEN;
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else
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return kcm_get_idx(seq, *pos - 1);
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}
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static void kcm_seq_stop(struct seq_file *seq, void *v)
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__releases(rcu)
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{
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rcu_read_unlock();
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}
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struct kcm_proc_mux_state {
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struct seq_net_private p;
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int idx;
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};
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static void kcm_format_mux_header(struct seq_file *seq)
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{
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struct net *net = seq_file_net(seq);
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struct kcm_net *knet = net_generic(net, kcm_net_id);
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seq_printf(seq,
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"*** KCM statistics (%d MUX) ****\n",
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knet->count);
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seq_printf(seq,
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"%-14s %-10s %-16s %-10s %-16s %-8s %-8s %-8s %-8s %s",
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"Object",
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"RX-Msgs",
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"RX-Bytes",
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"TX-Msgs",
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"TX-Bytes",
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"Recv-Q",
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"Rmem",
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"Send-Q",
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"Smem",
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"Status");
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/* XXX: pdsts header stuff here */
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seq_puts(seq, "\n");
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}
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static void kcm_format_sock(struct kcm_sock *kcm, struct seq_file *seq,
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int i, int *len)
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{
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seq_printf(seq,
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" kcm-%-7u %-10llu %-16llu %-10llu %-16llu %-8d %-8d %-8d %-8s ",
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kcm->index,
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kcm->stats.rx_msgs,
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kcm->stats.rx_bytes,
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kcm->stats.tx_msgs,
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kcm->stats.tx_bytes,
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kcm->sk.sk_receive_queue.qlen,
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sk_rmem_alloc_get(&kcm->sk),
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kcm->sk.sk_write_queue.qlen,
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"-");
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if (kcm->tx_psock)
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seq_printf(seq, "Psck-%u ", kcm->tx_psock->index);
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if (kcm->tx_wait)
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seq_puts(seq, "TxWait ");
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if (kcm->tx_wait_more)
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seq_puts(seq, "WMore ");
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if (kcm->rx_wait)
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seq_puts(seq, "RxWait ");
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seq_puts(seq, "\n");
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}
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static void kcm_format_psock(struct kcm_psock *psock, struct seq_file *seq,
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int i, int *len)
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{
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seq_printf(seq,
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" psock-%-5u %-10llu %-16llu %-10llu %-16llu %-8d %-8d %-8d %-8d ",
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psock->index,
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psock->strp.stats.msgs,
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psock->strp.stats.bytes,
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psock->stats.tx_msgs,
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psock->stats.tx_bytes,
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psock->sk->sk_receive_queue.qlen,
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atomic_read(&psock->sk->sk_rmem_alloc),
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psock->sk->sk_write_queue.qlen,
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refcount_read(&psock->sk->sk_wmem_alloc));
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if (psock->done)
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seq_puts(seq, "Done ");
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if (psock->tx_stopped)
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seq_puts(seq, "TxStop ");
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if (psock->strp.stopped)
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seq_puts(seq, "RxStop ");
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if (psock->tx_kcm)
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seq_printf(seq, "Rsvd-%d ", psock->tx_kcm->index);
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if (!psock->strp.paused && !psock->ready_rx_msg) {
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if (psock->sk->sk_receive_queue.qlen) {
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if (psock->strp.need_bytes)
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seq_printf(seq, "RxWait=%u ",
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psock->strp.need_bytes);
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else
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seq_printf(seq, "RxWait ");
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}
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} else {
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if (psock->strp.paused)
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seq_puts(seq, "RxPause ");
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if (psock->ready_rx_msg)
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seq_puts(seq, "RdyRx ");
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}
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seq_puts(seq, "\n");
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}
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static void
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kcm_format_mux(struct kcm_mux *mux, loff_t idx, struct seq_file *seq)
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{
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int i, len;
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struct kcm_sock *kcm;
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struct kcm_psock *psock;
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/* mux information */
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seq_printf(seq,
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"%-6s%-8s %-10llu %-16llu %-10llu %-16llu %-8s %-8s %-8s %-8s ",
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"mux", "",
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mux->stats.rx_msgs,
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mux->stats.rx_bytes,
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mux->stats.tx_msgs,
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mux->stats.tx_bytes,
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"-", "-", "-", "-");
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seq_printf(seq, "KCMs: %d, Psocks %d\n",
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mux->kcm_socks_cnt, mux->psocks_cnt);
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/* kcm sock information */
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i = 0;
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spin_lock_bh(&mux->lock);
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list_for_each_entry(kcm, &mux->kcm_socks, kcm_sock_list) {
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kcm_format_sock(kcm, seq, i, &len);
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i++;
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}
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i = 0;
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list_for_each_entry(psock, &mux->psocks, psock_list) {
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kcm_format_psock(psock, seq, i, &len);
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i++;
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}
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spin_unlock_bh(&mux->lock);
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}
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static int kcm_seq_show(struct seq_file *seq, void *v)
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{
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struct kcm_proc_mux_state *mux_state;
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mux_state = seq->private;
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if (v == SEQ_START_TOKEN) {
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mux_state->idx = 0;
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kcm_format_mux_header(seq);
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} else {
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kcm_format_mux(v, mux_state->idx, seq);
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mux_state->idx++;
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}
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return 0;
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}
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static const struct seq_operations kcm_seq_ops = {
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.show = kcm_seq_show,
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.start = kcm_seq_start,
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.next = kcm_seq_next,
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.stop = kcm_seq_stop,
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};
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static int kcm_stats_seq_show(struct seq_file *seq, void *v)
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{
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struct kcm_psock_stats psock_stats;
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struct kcm_mux_stats mux_stats;
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struct strp_aggr_stats strp_stats;
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struct kcm_mux *mux;
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struct kcm_psock *psock;
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struct net *net = seq->private;
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struct kcm_net *knet = net_generic(net, kcm_net_id);
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memset(&mux_stats, 0, sizeof(mux_stats));
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memset(&psock_stats, 0, sizeof(psock_stats));
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memset(&strp_stats, 0, sizeof(strp_stats));
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mutex_lock(&knet->mutex);
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aggregate_mux_stats(&knet->aggregate_mux_stats, &mux_stats);
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aggregate_psock_stats(&knet->aggregate_psock_stats,
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&psock_stats);
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aggregate_strp_stats(&knet->aggregate_strp_stats,
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&strp_stats);
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list_for_each_entry_rcu(mux, &knet->mux_list, kcm_mux_list) {
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spin_lock_bh(&mux->lock);
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aggregate_mux_stats(&mux->stats, &mux_stats);
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aggregate_psock_stats(&mux->aggregate_psock_stats,
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&psock_stats);
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aggregate_strp_stats(&mux->aggregate_strp_stats,
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&strp_stats);
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list_for_each_entry(psock, &mux->psocks, psock_list) {
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aggregate_psock_stats(&psock->stats, &psock_stats);
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save_strp_stats(&psock->strp, &strp_stats);
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}
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spin_unlock_bh(&mux->lock);
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}
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mutex_unlock(&knet->mutex);
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seq_printf(seq,
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"%-8s %-10s %-16s %-10s %-16s %-10s %-10s %-10s %-10s %-10s\n",
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"MUX",
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"RX-Msgs",
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"RX-Bytes",
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"TX-Msgs",
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"TX-Bytes",
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"TX-Retries",
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"Attach",
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"Unattach",
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"UnattchRsvd",
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"RX-RdyDrops");
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seq_printf(seq,
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"%-8s %-10llu %-16llu %-10llu %-16llu %-10u %-10u %-10u %-10u %-10u\n",
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"",
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mux_stats.rx_msgs,
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mux_stats.rx_bytes,
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mux_stats.tx_msgs,
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mux_stats.tx_bytes,
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mux_stats.tx_retries,
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mux_stats.psock_attach,
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mux_stats.psock_unattach_rsvd,
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mux_stats.psock_unattach,
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mux_stats.rx_ready_drops);
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seq_printf(seq,
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"%-8s %-10s %-16s %-10s %-16s %-10s %-10s %-10s %-10s %-10s %-10s %-10s %-10s %-10s %-10s %-10s\n",
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"Psock",
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"RX-Msgs",
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"RX-Bytes",
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"TX-Msgs",
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"TX-Bytes",
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"Reserved",
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"Unreserved",
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"RX-Aborts",
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"RX-Intr",
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"RX-Unrecov",
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"RX-MemFail",
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"RX-NeedMor",
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"RX-BadLen",
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"RX-TooBig",
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"RX-Timeout",
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"TX-Aborts");
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seq_printf(seq,
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"%-8s %-10llu %-16llu %-10llu %-16llu %-10llu %-10llu %-10u %-10u %-10u %-10u %-10u %-10u %-10u %-10u %-10u\n",
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"",
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strp_stats.msgs,
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strp_stats.bytes,
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psock_stats.tx_msgs,
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psock_stats.tx_bytes,
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psock_stats.reserved,
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psock_stats.unreserved,
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strp_stats.aborts,
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strp_stats.interrupted,
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strp_stats.unrecov_intr,
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strp_stats.mem_fail,
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strp_stats.need_more_hdr,
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strp_stats.bad_hdr_len,
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strp_stats.msg_too_big,
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strp_stats.msg_timeouts,
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psock_stats.tx_aborts);
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return 0;
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}
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static int kcm_proc_init_net(struct net *net)
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{
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if (!proc_create_net_single("kcm_stats", 0444, net->proc_net,
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kcm_stats_seq_show, NULL))
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goto out_kcm_stats;
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if (!proc_create_net("kcm", 0444, net->proc_net, &kcm_seq_ops,
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sizeof(struct kcm_proc_mux_state)))
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goto out_kcm;
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return 0;
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out_kcm:
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remove_proc_entry("kcm_stats", net->proc_net);
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out_kcm_stats:
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return -ENOMEM;
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}
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static void kcm_proc_exit_net(struct net *net)
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{
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remove_proc_entry("kcm", net->proc_net);
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remove_proc_entry("kcm_stats", net->proc_net);
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}
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static struct pernet_operations kcm_net_ops = {
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.init = kcm_proc_init_net,
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.exit = kcm_proc_exit_net,
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};
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int __init kcm_proc_init(void)
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{
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return register_pernet_subsys(&kcm_net_ops);
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}
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void __exit kcm_proc_exit(void)
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{
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unregister_pernet_subsys(&kcm_net_ops);
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}
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#endif /* CONFIG_PROC_FS */
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