@@ -11,6 +11,46 @@
extern unsigned int kcm_net_id;
+#define KCM_STATS_ADD(stat, count) \
+ ((stat) += (count))
+
+#define KCM_STATS_INCR(stat) \
+ ((stat)++)
+
+struct kcm_psock_stats {
+ unsigned long long rx_msgs;
+ unsigned long long rx_bytes;
+ unsigned long long tx_msgs;
+ unsigned long long tx_bytes;
+ unsigned int rx_aborts;
+ unsigned int rx_mem_fail;
+ unsigned int rx_need_more_hdr;
+ unsigned int rx_bad_hdr_len;
+ unsigned long long reserved;
+ unsigned long long unreserved;
+ unsigned int tx_aborts;
+};
+
+struct kcm_mux_stats {
+ unsigned long long rx_msgs;
+ unsigned long long rx_bytes;
+ unsigned long long tx_msgs;
+ unsigned long long tx_bytes;
+ unsigned int rx_ready_drops;
+ unsigned int tx_no_psock;
+ unsigned int tx_retries;
+ unsigned int psock_attach;
+ unsigned int psock_unattach_rsvd;
+ unsigned int psock_unattach;
+};
+
+struct kcm_stats {
+ unsigned long long rx_msgs;
+ unsigned long long rx_bytes;
+ unsigned long long tx_msgs;
+ unsigned long long tx_bytes;
+};
+
struct kcm_tx_msg {
unsigned int sent;
unsigned int fragidx;
@@ -30,6 +70,8 @@ struct kcm_sock {
struct kcm_mux *mux;
struct list_head kcm_sock_list;
+ struct kcm_stats stats;
+
/* Transmit */
struct kcm_psock *tx_psock;
struct work_struct tx_work;
@@ -61,6 +103,10 @@ struct kcm_psock {
struct list_head psock_list;
+ struct kcm_psock_stats stats;
+ unsigned long long saved_tx_bytes;
+ unsigned long long saved_tx_msgs;
+
/* Receive */
struct sk_buff *rx_skb_head;
struct sk_buff **rx_skb_nextp;
@@ -78,6 +124,8 @@ struct kcm_psock {
/* Per net MUX list */
struct kcm_net {
struct mutex mutex;
+ struct kcm_psock_stats aggregate_psock_stats;
+ struct kcm_mux_stats aggregate_mux_stats;
struct list_head mux_list;
int count;
};
@@ -94,6 +142,9 @@ struct kcm_mux {
struct list_head psocks; /* List of all psocks on MUX */
int psocks_cnt; /* Total attached sockets */
+ struct kcm_mux_stats stats;
+ struct kcm_psock_stats aggregate_psock_stats;
+
/* Receive */
struct list_head kcm_rx_waiters; /* KCMs waiting for receiving */
struct kcm_sock *last_rx_kcm;
@@ -104,6 +155,57 @@ struct kcm_mux {
struct list_head kcm_tx_waiters; /* KCMs waiting for a TX psock */
};
+#ifdef CONFIG_PROC_FS
+int kcm_proc_init(void);
+void kcm_proc_exit(void);
+#else
+static int kcm_proc_init(void) { return 0; }
+static void kcm_proc_exit(void) { }
+#endif
+
+
+static inline void aggregate_psock_stats(struct kcm_psock_stats *stats,
+ struct kcm_psock_stats *agg_stats)
+{
+ /* Save psock statistics in the mux when psock is being unattached. */
+
+#define SAVE_PSOCK_STATS(_stat) (agg_stats->_stat += stats->_stat)
+
+ SAVE_PSOCK_STATS(rx_msgs);
+ SAVE_PSOCK_STATS(rx_bytes);
+ SAVE_PSOCK_STATS(rx_aborts);
+ SAVE_PSOCK_STATS(rx_mem_fail);
+ SAVE_PSOCK_STATS(rx_need_more_hdr);
+ SAVE_PSOCK_STATS(rx_bad_hdr_len);
+ SAVE_PSOCK_STATS(tx_msgs);
+ SAVE_PSOCK_STATS(tx_bytes);
+ SAVE_PSOCK_STATS(reserved);
+ SAVE_PSOCK_STATS(unreserved);
+ SAVE_PSOCK_STATS(tx_aborts);
+
+#undef SAVE_PSOCK_STATS
+}
+
+static inline void aggregate_mux_stats(struct kcm_mux_stats *stats,
+ struct kcm_mux_stats *agg_stats)
+{
+ /* Save psock statistics in the mux when psock is being unattached. */
+
+#define SAVE_MUX_STATS(_stat) (agg_stats->_stat += stats->_stat)
+
+ SAVE_MUX_STATS(rx_msgs);
+ SAVE_MUX_STATS(rx_bytes);
+ SAVE_MUX_STATS(tx_msgs);
+ SAVE_MUX_STATS(tx_bytes);
+ SAVE_MUX_STATS(tx_no_psock);
+ SAVE_MUX_STATS(rx_ready_drops);
+ SAVE_MUX_STATS(psock_attach);
+ SAVE_MUX_STATS(psock_unattach_rsvd);
+ SAVE_MUX_STATS(psock_unattach);
+
+#undef SAVE_MUX_STATS
+}
+
#endif /* __KERNEL__ */
#endif /* __NET_KCM_H_ */
@@ -1,3 +1,3 @@
obj-$(CONFIG_AF_KCM) += kcm.o
-kcm-y := kcmsock.o
+kcm-y := kcmsock.o kcmproc.o
new file mode 100644
@@ -0,0 +1,415 @@
+#include <linux/in.h>
+#include <linux/inet.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/net.h>
+#include <linux/proc_fs.h>
+#include <linux/rculist.h>
+#include <linux/seq_file.h>
+#include <linux/socket.h>
+#include <net/inet_sock.h>
+#include <net/kcm.h>
+#include <net/net_namespace.h>
+#include <net/netns/generic.h>
+#include <net/tcp.h>
+
+#ifdef CONFIG_PROC_FS
+struct kcm_seq_muxinfo {
+ char *name;
+ const struct file_operations *seq_fops;
+ struct seq_operations seq_ops;
+};
+
+static struct kcm_mux *kcm_get_first(struct seq_file *seq)
+{
+ struct net *net = seq_file_net(seq);
+ struct kcm_net *knet = net_generic(net, kcm_net_id);
+
+ return list_first_or_null_rcu(&knet->mux_list,
+ struct kcm_mux, kcm_mux_list);
+}
+
+static struct kcm_mux *kcm_get_next(struct kcm_mux *mux)
+{
+ struct kcm_net *knet = mux->knet;
+
+ return list_next_or_null_rcu(&knet->mux_list, &mux->kcm_mux_list,
+ struct kcm_mux, kcm_mux_list);
+}
+
+static struct kcm_mux *kcm_get_idx(struct seq_file *seq, loff_t pos)
+{
+ struct net *net = seq_file_net(seq);
+ struct kcm_net *knet = net_generic(net, kcm_net_id);
+ struct kcm_mux *m;
+
+ list_for_each_entry(m, &knet->mux_list, kcm_mux_list) {
+ if (!pos)
+ return m;
+ --pos;
+ }
+ return NULL;
+}
+
+static void *kcm_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ void *p;
+
+ if (v == SEQ_START_TOKEN)
+ p = kcm_get_first(seq);
+ else
+ p = kcm_get_next(v);
+ ++*pos;
+ return p;
+}
+
+static void *kcm_seq_start(struct seq_file *seq, loff_t *pos)
+ __acquires(rcu)
+{
+ rcu_read_lock();
+
+ if (!*pos)
+ return SEQ_START_TOKEN;
+ else
+ return kcm_get_idx(seq, *pos - 1);
+}
+
+static void kcm_seq_stop(struct seq_file *seq, void *v)
+ __releases(rcu)
+{
+ rcu_read_unlock();
+}
+
+struct kcm_proc_mux_state {
+ struct seq_net_private p;
+ int idx;
+};
+
+static int kcm_seq_open(struct inode *inode, struct file *file)
+{
+ struct kcm_seq_muxinfo *muxinfo = PDE_DATA(inode);
+ int err;
+
+ err = seq_open_net(inode, file, &muxinfo->seq_ops,
+ sizeof(struct kcm_proc_mux_state));
+ if (err < 0)
+ return err;
+ return err;
+}
+
+static void kcm_format_mux_header(struct seq_file *seq)
+{
+ struct net *net = seq_file_net(seq);
+ struct kcm_net *knet = net_generic(net, kcm_net_id);
+
+ seq_printf(seq,
+ "*** KCM statistics (%d MUX) ****\n",
+ knet->count);
+
+ seq_printf(seq,
+ "%-8s %-10s %-16s %-10s %-16s %-8s %-8s %s",
+ "Object",
+ "RX-Msgs",
+ "RX-Bytes",
+ "TX-Msgs",
+ "TX-Bytes",
+ "Recv-Q",
+ "Send-Q",
+ "Status");
+
+ /* XXX: pdsts header stuff here */
+ seq_puts(seq, "\n");
+}
+
+static void kcm_format_sock(struct kcm_sock *kcm, struct seq_file *seq,
+ int i, int *len)
+{
+ seq_printf(seq,
+ "%-6s%-6s %-10llu %-16llu %-10llu %-16llu %-8d %-8d",
+ "", "kcm",
+ kcm->stats.rx_msgs,
+ kcm->stats.rx_bytes,
+ kcm->stats.tx_msgs,
+ kcm->stats.tx_bytes,
+ kcm->sk.sk_receive_queue.qlen,
+ kcm->sk.sk_write_queue.qlen);
+
+ if (kcm->tx_psock)
+ seq_puts(seq, "Psck ");
+
+ if (kcm->tx_wait)
+ seq_puts(seq, "TxWait ");
+
+ if (kcm->rx_wait)
+ seq_puts(seq, "RxWait ");
+
+ seq_puts(seq, "\n");
+}
+
+static void kcm_format_psock(struct kcm_psock *psock, struct seq_file *seq,
+ int i, int *len)
+{
+ seq_printf(seq,
+ "%-6s%-6s %-10llu %-16llu %-10llu %-16llu %-8d %-8d",
+ "", "psock",
+ psock->stats.rx_msgs,
+ psock->stats.rx_bytes,
+ psock->stats.tx_msgs,
+ psock->stats.tx_bytes,
+ psock->sk->sk_receive_queue.qlen,
+ psock->sk->sk_write_queue.qlen);
+
+ if (psock->done)
+ seq_puts(seq, "Done ");
+
+ if (psock->tx_stopped)
+ seq_puts(seq, "TxStop ");
+
+ if (psock->rx_stopped)
+ seq_puts(seq, "RxStop ");
+
+ if (psock->tx_kcm)
+ seq_puts(seq, "Rsvd ");
+
+ if (psock->ready_rx_msg)
+ seq_puts(seq, "RdyRx ");
+
+ seq_puts(seq, "\n");
+}
+
+static void
+kcm_format_mux(struct kcm_mux *mux, loff_t idx, struct seq_file *seq)
+{
+ int i, len;
+ struct kcm_sock *kcm;
+ struct kcm_psock *psock;
+
+ /* mux information */
+ seq_printf(seq,
+ "%-6s%-6s %-10llu %-16llu %-10llu %-16llu %-8s %-8s",
+ "mux", "",
+ mux->stats.tx_msgs,
+ mux->stats.tx_bytes,
+ mux->stats.rx_msgs,
+ mux->stats.rx_bytes,
+ "-", "-");
+
+ seq_printf(seq, "KCMs: %d, Psocks %d\n",
+ mux->kcm_socks_cnt, mux->psocks_cnt);
+
+ /* kcm sock information */
+ i = 0;
+ spin_lock_bh(&mux->lock);
+ list_for_each_entry(kcm, &mux->kcm_socks, kcm_sock_list) {
+ kcm_format_sock(kcm, seq, i, &len);
+ i++;
+ }
+ i = 0;
+ list_for_each_entry(psock, &mux->psocks, psock_list) {
+ kcm_format_psock(psock, seq, i, &len);
+ i++;
+ }
+ spin_unlock_bh(&mux->lock);
+}
+
+static int kcm_seq_show(struct seq_file *seq, void *v)
+{
+ struct kcm_proc_mux_state *mux_state;
+
+ mux_state = seq->private;
+ if (v == SEQ_START_TOKEN) {
+ mux_state->idx = 0;
+ kcm_format_mux_header(seq);
+ } else {
+ kcm_format_mux(v, mux_state->idx, seq);
+ mux_state->idx++;
+ }
+ return 0;
+}
+
+static const struct file_operations kcm_seq_fops = {
+ .owner = THIS_MODULE,
+ .open = kcm_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+};
+
+static struct kcm_seq_muxinfo kcm_seq_muxinfo = {
+ .name = "kcm",
+ .seq_fops = &kcm_seq_fops,
+ .seq_ops = {
+ .show = kcm_seq_show,
+ .start = kcm_seq_start,
+ .next = kcm_seq_next,
+ .stop = kcm_seq_stop,
+ }
+};
+
+static int kcm_proc_register(struct net *net, struct kcm_seq_muxinfo *muxinfo)
+{
+ struct proc_dir_entry *p;
+ int rc = 0;
+
+ p = proc_create_data(muxinfo->name, S_IRUGO, net->proc_net,
+ muxinfo->seq_fops, muxinfo);
+ if (!p)
+ rc = -ENOMEM;
+ return rc;
+}
+EXPORT_SYMBOL(kcm_proc_register);
+
+static void kcm_proc_unregister(struct net *net,
+ struct kcm_seq_muxinfo *muxinfo)
+{
+ remove_proc_entry(muxinfo->name, net->proc_net);
+}
+EXPORT_SYMBOL(kcm_proc_unregister);
+
+static int kcm_stats_seq_show(struct seq_file *seq, void *v)
+{
+ struct kcm_psock_stats psock_stats;
+ struct kcm_mux_stats mux_stats;
+ struct kcm_mux *mux;
+ struct kcm_psock *psock;
+ struct net *net = seq->private;
+ struct kcm_net *knet = net_generic(net, kcm_net_id);
+
+ memset(&mux_stats, 0, sizeof(mux_stats));
+ memset(&psock_stats, 0, sizeof(psock_stats));
+
+ mutex_lock(&knet->mutex);
+
+ aggregate_mux_stats(&knet->aggregate_mux_stats, &mux_stats);
+ aggregate_psock_stats(&knet->aggregate_psock_stats,
+ &psock_stats);
+
+ list_for_each_entry_rcu(mux, &knet->mux_list, kcm_mux_list) {
+ spin_lock_bh(&mux->lock);
+ aggregate_mux_stats(&mux->stats, &mux_stats);
+ aggregate_psock_stats(&mux->aggregate_psock_stats,
+ &psock_stats);
+ list_for_each_entry(psock, &mux->psocks, psock_list)
+ aggregate_psock_stats(&psock->stats, &psock_stats);
+ spin_unlock_bh(&mux->lock);
+ }
+
+ mutex_unlock(&knet->mutex);
+
+ seq_printf(seq,
+ "%-8s %-10s %-16s %-10s %-16s %-10s %-10s %-10s %-10s %-10s %-10s\n",
+ "MUX",
+ "RX-Msgs",
+ "RX-Bytes",
+ "TX-Msgs",
+ "TX-Bytes",
+ "TX-NoPsock",
+ "TX-Retries",
+ "Attach",
+ "Unattach",
+ "UnattchRsvd",
+ "RX-RdyDrops");
+
+ seq_printf(seq,
+ "%-8s %-10llu %-16llu %-10llu %-16llu %-10u %-10u %-10u %-10u %-10u %-10u\n",
+ "",
+ mux_stats.rx_msgs,
+ mux_stats.rx_bytes,
+ mux_stats.tx_msgs,
+ mux_stats.tx_bytes,
+ mux_stats.tx_no_psock,
+ mux_stats.tx_retries,
+ mux_stats.psock_attach,
+ mux_stats.psock_unattach_rsvd,
+ mux_stats.psock_unattach,
+ mux_stats.rx_ready_drops);
+
+ seq_printf(seq,
+ "%-8s %-10s %-16s %-10s %-16s %-10s %-10s %-10s %-10s %-10s %-10s %-10s\n",
+ "Psock",
+ "RX-Msgs",
+ "RX-Bytes",
+ "TX-Msgs",
+ "TX-Bytes",
+ "Reserved",
+ "Unreserved",
+ "RX-Aborts",
+ "RX-MemFail",
+ "RX-NeedMor",
+ "RX-BadLen",
+ "TX-Aborts");
+
+ seq_printf(seq,
+ "%-8s %-10llu %-16llu %-10llu %-16llu %-10llu %-10llu %-10u %-10u %-10u %-10u %-10u\n",
+ "",
+ psock_stats.rx_msgs,
+ psock_stats.rx_bytes,
+ psock_stats.tx_msgs,
+ psock_stats.tx_bytes,
+ psock_stats.reserved,
+ psock_stats.unreserved,
+ psock_stats.rx_aborts,
+ psock_stats.rx_mem_fail,
+ psock_stats.rx_need_more_hdr,
+ psock_stats.rx_bad_hdr_len,
+ psock_stats.tx_aborts);
+
+ return 0;
+}
+
+static int kcm_stats_seq_open(struct inode *inode, struct file *file)
+{
+ return single_open_net(inode, file, kcm_stats_seq_show);
+}
+
+static const struct file_operations kcm_stats_seq_fops = {
+ .owner = THIS_MODULE,
+ .open = kcm_stats_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release_net,
+};
+
+static int kcm_proc_init_net(struct net *net)
+{
+ int err;
+
+ if (!proc_create("kcm_stats", S_IRUGO, net->proc_net,
+ &kcm_stats_seq_fops)) {
+ err = -ENOMEM;
+ goto out_kcm_stats;
+ }
+
+ err = kcm_proc_register(net, &kcm_seq_muxinfo);
+ if (err)
+ goto out_kcm;
+
+ return 0;
+
+out_kcm:
+ remove_proc_entry("kcm_stats", net->proc_net);
+out_kcm_stats:
+ return err;
+}
+
+static void kcm_proc_exit_net(struct net *net)
+{
+ kcm_proc_unregister(net, &kcm_seq_muxinfo);
+ remove_proc_entry("kcm_stats", net->proc_net);
+}
+
+static struct pernet_operations kcm_net_ops = {
+ .init = kcm_proc_init_net,
+ .exit = kcm_proc_exit_net,
+};
+
+int __init kcm_proc_init(void)
+{
+ return register_pernet_subsys(&kcm_net_ops);
+}
+
+void __exit kcm_proc_exit(void)
+{
+ unregister_pernet_subsys(&kcm_net_ops);
+}
+
+#endif /* CONFIG_PROC_FS */
@@ -53,6 +53,7 @@ static void kcm_abort_rx_psock(struct kcm_psock *psock, int err,
return;
psock->rx_stopped = 1;
+ KCM_STATS_INCR(psock->stats.rx_aborts);
if (!skb)
return;
@@ -93,6 +94,7 @@ static void kcm_abort_tx_psock(struct kcm_psock *psock, int err,
}
psock->tx_stopped = 1;
+ KCM_STATS_INCR(psock->stats.tx_aborts);
if (!psock->tx_kcm) {
/* Take off psocks_avail list */
@@ -144,6 +146,9 @@ static bool new_rx_msg(struct kcm_psock *psock, struct sk_buff *head)
return false;
}
+ KCM_STATS_ADD(mux->stats.rx_bytes, kcm_rx_msg(head)->full_len);
+ KCM_STATS_INCR(mux->stats.rx_msgs);
+
if (list_empty(&mux->kcm_rx_waiters)) {
psock->ready_rx_msg = head;
@@ -263,6 +268,7 @@ static int kcm_tcp_recv(read_descriptor_t *desc, struct sk_buff *orig_skb,
skb = alloc_skb(0, GFP_ATOMIC);
if (!skb) {
+ KCM_STATS_INCR(psock->stats.rx_mem_fail);
desc->error = -ENOMEM;
return 0;
}
@@ -277,6 +283,7 @@ static int kcm_tcp_recv(read_descriptor_t *desc, struct sk_buff *orig_skb,
} else {
err = skb_unclone(head, GFP_ATOMIC);
if (err) {
+ KCM_STATS_INCR(psock->stats.rx_mem_fail);
desc->error = err;
return 0;
}
@@ -289,11 +296,13 @@ static int kcm_tcp_recv(read_descriptor_t *desc, struct sk_buff *orig_skb,
/* Always clone since we will consume something */
skb = skb_clone(orig_skb, GFP_ATOMIC);
if (!skb) {
+ KCM_STATS_INCR(psock->stats.rx_mem_fail);
desc->error = -ENOMEM;
break;
}
if (!pskb_pull(skb, offset + eaten)) {
+ KCM_STATS_INCR(psock->stats.rx_mem_fail);
kfree_skb(skb);
desc->error = -ENOMEM;
break;
@@ -308,6 +317,7 @@ static int kcm_tcp_recv(read_descriptor_t *desc, struct sk_buff *orig_skb,
/* Need to trim should be rare */
err = pskb_trim(skb, orig_len - eaten);
if (err) {
+ KCM_STATS_INCR(psock->stats.rx_mem_fail);
kfree_skb(skb);
desc->error = err;
break;
@@ -342,11 +352,13 @@ static int kcm_tcp_recv(read_descriptor_t *desc, struct sk_buff *orig_skb,
if (!len) {
/* Need more header to determine length */
+ KCM_STATS_INCR(psock->stats.rx_need_more_hdr);
break;
} else if (len <= head->len - skb->len) {
/* Length must be into new skb (and also
* greater than zero)
*/
+ KCM_STATS_INCR(psock->stats.rx_bad_hdr_len);
desc->error = -EPROTO;
psock->rx_skb_head = NULL;
kcm_abort_rx_psock(psock, EPROTO, head);
@@ -376,6 +388,7 @@ static int kcm_tcp_recv(read_descriptor_t *desc, struct sk_buff *orig_skb,
/* Hurray, we have a new message! */
psock->rx_skb_head = NULL;
+ KCM_STATS_INCR(psock->stats.rx_msgs);
if (new_rx_msg(psock, head)) {
/* Message was held at psock */
@@ -383,6 +396,8 @@ static int kcm_tcp_recv(read_descriptor_t *desc, struct sk_buff *orig_skb,
}
}
+ KCM_STATS_ADD(psock->stats.rx_bytes, eaten);
+
return eaten;
}
@@ -512,6 +527,9 @@ static struct kcm_psock *reserve_psock(struct kcm_sock *kcm,
}
kcm->tx_psock = psock;
psock->tx_kcm = kcm;
+ KCM_STATS_INCR(psock->stats.reserved);
+ psock->saved_tx_bytes = psock->stats.tx_bytes;
+ psock->saved_tx_msgs = psock->stats.tx_msgs;
} else if (kcm->tx_wait) {
err = -EAGAIN;
} else {
@@ -521,6 +539,7 @@ static struct kcm_psock *reserve_psock(struct kcm_sock *kcm,
kcm->tx_wait = 1;
err = -EAGAIN;
} else {
+ KCM_STATS_INCR(mux->stats.tx_no_psock);
err = -EPIPE;
}
}
@@ -548,6 +567,9 @@ static void psock_now_avail(struct kcm_psock *psock)
kcm->tx_wait = 0;
kcm->tx_psock = psock;
psock->tx_kcm = kcm;
+ KCM_STATS_INCR(psock->stats.reserved);
+ psock->saved_tx_bytes = psock->stats.tx_bytes;
+ psock->saved_tx_msgs = psock->stats.tx_msgs;
queue_work(kcm_wq, &kcm->tx_work);
}
}
@@ -563,10 +585,16 @@ static void unreserve_psock(struct kcm_sock *kcm)
spin_lock_bh(&mux->lock);
+ KCM_STATS_ADD(mux->stats.tx_bytes,
+ psock->stats.tx_bytes - psock->saved_tx_bytes);
+ mux->stats.tx_msgs +=
+ psock->stats.tx_msgs - psock->saved_tx_msgs;
+
WARN_ON(kcm->tx_wait);
kcm->tx_psock = NULL;
psock->tx_kcm = NULL;
+ KCM_STATS_INCR(psock->stats.unreserved);
if (unlikely(psock->done || psock->tx_stopped)) {
if (psock->done) {
@@ -590,6 +618,15 @@ static void unreserve_psock(struct kcm_sock *kcm)
spin_unlock_bh(&mux->lock);
}
+static void kcm_report_tx_retry(struct kcm_sock *kcm)
+{
+ struct kcm_mux *mux = kcm->mux;
+
+ spin_lock_bh(&mux->lock);
+ KCM_STATS_INCR(mux->stats.tx_retries);
+ spin_unlock_bh(&mux->lock);
+}
+
/* Write any messages ready on the kcm socket. Called with kcm sock lock
* held. Return bytes actually sent or error.
*/
@@ -616,6 +653,7 @@ static int kcm_write_msgs(struct kcm_sock *kcm)
* it and we'll retry the message.
*/
unreserve_psock(kcm);
+ kcm_report_tx_retry(kcm);
txm->sent = 0;
} else if (txm->sent) {
/* Send of first skbuff in queue already in progress */
@@ -690,12 +728,14 @@ do_frag:
unreserve_psock(kcm);
txm->sent = 0;
+ kcm_report_tx_retry(kcm);
goto try_again;
}
sent += ret;
frag_offset += ret;
+ KCM_STATS_ADD(psock->stats.tx_bytes, ret);
if (frag_offset < frag->size) {
/* Not finished with this frag */
goto do_frag;
@@ -717,6 +757,7 @@ do_frag:
kfree_skb(head);
sk->sk_wmem_queued -= sent;
total_sent += sent;
+ KCM_STATS_INCR(psock->stats.tx_msgs);
} while ((head = skb_peek(&sk->sk_write_queue)));
out:
if (!head) {
@@ -901,6 +942,9 @@ static int kcm_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
/* Everything seems okay */
+ KCM_STATS_ADD(kcm->stats.tx_bytes, total_len);
+ KCM_STATS_INCR(kcm->stats.tx_msgs);
+
release_sock(sk);
return total_len;
@@ -987,6 +1031,8 @@ static int kcm_recvmsg(struct socket *sock,
copied = len;
if (likely(!(flags & MSG_PEEK))) {
/* Finished with message */
+ KCM_STATS_ADD(kcm->stats.rx_bytes, copied);
+ KCM_STATS_INCR(kcm->stats.rx_msgs);
skb_unlink(skb, &sk->sk_receive_queue);
kfree_skb(skb);
}
@@ -1058,6 +1104,7 @@ static int kcm_attach(struct socket *sock, struct socket *csock,
/* Finished initialization, now add the psock to the MUX. */
spin_lock_bh(&mux->lock);
+ KCM_STATS_INCR(mux->stats.psock_attach);
list_add_tail(&psock->psock_list, &mux->psocks);
mux->psocks_cnt++;
psock_now_avail(psock);
@@ -1154,14 +1201,19 @@ static void kcm_unattach(struct kcm_psock *psock)
list_del(&psock->psock_ready_list);
kfree_skb(psock->ready_rx_msg);
psock->ready_rx_msg = NULL;
+ KCM_STATS_INCR(mux->stats.rx_ready_drops);
}
+ KCM_STATS_INCR(mux->stats.psock_unattach);
+ aggregate_psock_stats(&psock->stats, &mux->aggregate_psock_stats);
+
if (psock->tx_kcm) {
/* psock was reserved. Just mark it finished and we will clean
* up in the kcm paths, we need kcm lock which can not be
* acquired here.
*/
psock->done = 1;
+ KCM_STATS_INCR(mux->stats.psock_unattach_rsvd);
spin_unlock_bh(&mux->lock);
kcm_abort_tx_psock(psock, EPIPE, true, true);
} else {
@@ -1283,6 +1335,9 @@ static void release_mux(struct kcm_mux *mux)
return;
mutex_lock(&knet->mutex);
+ aggregate_mux_stats(&mux->stats, &knet->aggregate_mux_stats);
+ aggregate_psock_stats(&mux->aggregate_psock_stats,
+ &knet->aggregate_psock_stats);
list_del_rcu(&mux->kcm_mux_list);
knet->count--;
mutex_unlock(&knet->mutex);
@@ -1529,8 +1584,15 @@ static int __init kcm_init(void)
if (err)
goto net_ops_fail;
+ err = kcm_proc_init();
+ if (err)
+ goto proc_init_fail;
+
return 0;
+proc_init_fail:
+ unregister_pernet_device(&kcm_net_ops);
+
net_ops_fail:
sock_unregister(PF_KCM);
@@ -1549,6 +1611,7 @@ fail:
static void __exit kcm_exit(void)
{
+ kcm_proc_exit();
unregister_pernet_device(&kcm_net_ops);
sock_unregister(PF_KCM);
proto_unregister(&kcm_proto);
This patch add various counters for KCM. These include counters for messages and bytes received or sent, as well as counters number of attached/unattached TCP sockets and other error or edge events. The statistics are exposed via a proc interface. /proc/net/kcm provdes statistics per KCM socket and per psock (attached TCP sockkets). /proc/net/kcm_stats provides aggregate statistics. Signed-off-by: Tom Herbert <tom@herbertland.com> --- include/net/kcm.h | 102 ++++++++++++++ net/kcm/Makefile | 2 +- net/kcm/kcmproc.c | 415 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ net/kcm/kcmsock.c | 63 +++++++++ 4 files changed, 581 insertions(+), 1 deletion(-) create mode 100644 net/kcm/kcmproc.c