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/*
* Copyright (c) 2008 Mellanox Technologies Ltd. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <linux/proc_fs.h>
#include <rdma/sdp_socket.h>
#include "sdp.h"
#ifdef CONFIG_PROC_FS
#define PROC_SDP_STATS "sdpstats"
#define PROC_SDP_PERF "sdpprf"
/* just like TCP fs */
struct sdp_seq_afinfo {
struct module *owner;
char *name;
sa_family_t family;
int (*seq_show) (struct seq_file *m, void *v);
struct file_operations *seq_fops;
};
struct sdp_iter_state {
sa_family_t family;
int num;
struct seq_operations seq_ops;
};
static void *sdp_get_idx(struct seq_file *seq, loff_t pos)
{
int i = 0;
struct sdp_sock *ssk;
if (!list_empty(&sock_list))
list_for_each_entry(ssk, &sock_list, sock_list) {
if (i == pos)
return ssk;
i++;
}
return NULL;
}
static void *sdp_seq_start(struct seq_file *seq, loff_t *pos)
{
void *start = NULL;
struct sdp_iter_state *st = seq->private;
st->num = 0;
if (!*pos)
return SEQ_START_TOKEN;
spin_lock_irq(&sock_list_lock);
start = sdp_get_idx(seq, *pos - 1);
if (start)
sock_hold((struct socket *)start, SOCK_REF_SEQ);
spin_unlock_irq(&sock_list_lock);
return start;
}
static void *sdp_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
struct sdp_iter_state *st = seq->private;
void *next = NULL;
spin_lock_irq(&sock_list_lock);
if (v == SEQ_START_TOKEN)
next = sdp_get_idx(seq, 0);
else
next = sdp_get_idx(seq, *pos);
if (next)
sock_hold((struct socket *)next, SOCK_REF_SEQ);
spin_unlock_irq(&sock_list_lock);
*pos += 1;
st->num++;
return next;
}
static void sdp_seq_stop(struct seq_file *seq, void *v)
{
}
#define TMPSZ 150
static int sdp_seq_show(struct seq_file *seq, void *v)
{
struct sdp_iter_state *st;
struct socket *sk = v;
char tmpbuf[TMPSZ + 1];
unsigned int dest;
unsigned int src;
int uid;
unsigned long inode;
__u16 destp;
__u16 srcp;
__u32 rx_queue, tx_queue;
if (v == SEQ_START_TOKEN) {
seq_printf(seq, "%-*s\n", TMPSZ - 1,
" sl local_address rem_address "
"uid inode rx_queue tx_queue state");
goto out;
}
st = seq->private;
dest = inet_sk(sk)->daddr;
src = inet_sk(sk)->rcv_saddr;
destp = ntohs(inet_sk(sk)->dport);
srcp = ntohs(inet_sk(sk)->sport);
uid = sock_i_uid(sk);
inode = sock_i_ino(sk);
rx_queue = rcv_nxt(sdp_sk(sk)) - sdp_sk(sk)->copied_seq;
tx_queue = sdp_sk(sk)->write_seq - sdp_sk(sk)->tx_ring.una_seq;
sprintf(tmpbuf, "%4d: %08X:%04X %08X:%04X %5d %lu %08X:%08X %X",
st->num, src, srcp, dest, destp, uid, inode,
rx_queue, tx_queue, sk->sk_state);
seq_printf(seq, "%-*s\n", TMPSZ - 1, tmpbuf);
sock_put(sk, SOCK_REF_SEQ);
out:
return 0;
}
static int sdp_seq_open(struct inode *inode, struct file *file)
{
struct sdp_seq_afinfo *afinfo = PDE(inode)->data;
struct seq_file *seq;
struct sdp_iter_state *s;
int rc;
if (unlikely(afinfo == NULL))
return -EINVAL;
/* Workaround bogus warning by memtrack */
#define _kzalloc(size,flags) kzalloc(size,flags)
#undef kzalloc
s = kzalloc(sizeof(*s), GFP_KERNEL);
#define kzalloc(s,f) _kzalloc(s,f)
if (!s)
return -ENOMEM;
s->family = afinfo->family;
s->seq_ops.start = sdp_seq_start;
s->seq_ops.next = sdp_seq_next;
s->seq_ops.show = afinfo->seq_show;
s->seq_ops.stop = sdp_seq_stop;
rc = seq_open(file, &s->seq_ops);
if (rc)
goto out_kfree;
seq = file->private_data;
seq->private = s;
out:
return rc;
out_kfree:
kfree(s);
goto out;
}
static struct file_operations sdp_seq_fops;
static struct sdp_seq_afinfo sdp_seq_afinfo = {
.owner = THIS_MODULE,
.name = "sdp",
.family = AF_INET_SDP,
.seq_show = sdp_seq_show,
.seq_fops = &sdp_seq_fops,
};
#ifdef SDPSTATS_ON
DEFINE_PER_CPU(struct sdpstats, sdpstats);
static void sdpstats_seq_hist(struct seq_file *seq, char *str, u32 *h, int n,
int is_log)
{
int i;
u32 max = 0;
seq_printf(seq, "%s:\n", str);
for (i = 0; i < n; i++) {
if (h[i] > max)
max = h[i];
}
if (max == 0) {
seq_printf(seq, " - all values are 0\n");
return;
}
for (i = 0; i < n; i++) {
char s[51];
int j = 50 * h[i] / max;
int val = is_log ? (i == n-1 ? 0 : 1<<i) : i;
memset(s, '*', j);
s[j] = '\0';
seq_printf(seq, "%10d | %-50s - %d\n", val, s, h[i]);
}
}
#define SDPSTATS_COUNTER_GET(var) ({ \
u32 __val = 0; \
unsigned int __i; \
for_each_possible_cpu(__i) \
__val += per_cpu(sdpstats, __i).var; \
__val; \
})
#define SDPSTATS_HIST_GET(hist, hist_len, sum) ({ \
unsigned int __i; \
for_each_possible_cpu(__i) { \
unsigned int __j; \
u32 *h = per_cpu(sdpstats, __i).hist; \
for (__j = 0; __j < hist_len; __j++) { \
sum[__j] += h[__j]; \
} \
} \
})
#define __sdpstats_seq_hist(seq, msg, hist, is_log) ({ \
u32 tmp_hist[SDPSTATS_MAX_HIST_SIZE]; \
int hist_len = ARRAY_SIZE(__get_cpu_var(sdpstats).hist);\
memset(tmp_hist, 0, sizeof(tmp_hist)); \
SDPSTATS_HIST_GET(hist, hist_len, tmp_hist); \
sdpstats_seq_hist(seq, msg, tmp_hist, hist_len, is_log);\
})
static int sdpstats_seq_show(struct seq_file *seq, void *v)
{
int i;
seq_printf(seq, "SDP statistics:\n");
__sdpstats_seq_hist(seq, "sendmsg_seglen", sendmsg_seglen, 1);
__sdpstats_seq_hist(seq, "send_size", send_size, 1);
__sdpstats_seq_hist(seq, "credits_before_update",
credits_before_update, 0);
seq_printf(seq, "sdp_sendmsg() calls\t\t: %d\n",
SDPSTATS_COUNTER_GET(sendmsg));
seq_printf(seq, "bcopy segments \t\t: %d\n",
SDPSTATS_COUNTER_GET(sendmsg_bcopy_segment));
seq_printf(seq, "bzcopy segments \t\t: %d\n",
SDPSTATS_COUNTER_GET(sendmsg_bzcopy_segment));
seq_printf(seq, "zcopy segments \t\t: %d\n",
SDPSTATS_COUNTER_GET(sendmsg_zcopy_segment));
seq_printf(seq, "post_send_credits \t\t: %d\n",
SDPSTATS_COUNTER_GET(post_send_credits));
seq_printf(seq, "memcpy_count \t\t: %u\n",
SDPSTATS_COUNTER_GET(memcpy_count));
for (i = 0; i < ARRAY_SIZE(__get_cpu_var(sdpstats).post_send); i++) {
if (mid2str(i)) {
seq_printf(seq, "post_send %-20s\t: %d\n",
mid2str(i),
SDPSTATS_COUNTER_GET(post_send[i]));
}
}
seq_printf(seq, "\n");
seq_printf(seq, "post_recv \t\t: %d\n",
SDPSTATS_COUNTER_GET(post_recv));
seq_printf(seq, "BZCopy poll miss \t\t: %d\n",
SDPSTATS_COUNTER_GET(bzcopy_poll_miss));
seq_printf(seq, "send_wait_for_mem \t\t: %d\n",
SDPSTATS_COUNTER_GET(send_wait_for_mem));
seq_printf(seq, "send_miss_no_credits\t\t: %d\n",
SDPSTATS_COUNTER_GET(send_miss_no_credits));
seq_printf(seq, "rx_poll_miss \t\t: %d\n", SDPSTATS_COUNTER_GET(rx_poll_miss));
seq_printf(seq, "tx_poll_miss \t\t: %d\n", SDPSTATS_COUNTER_GET(tx_poll_miss));
seq_printf(seq, "tx_poll_busy \t\t: %d\n", SDPSTATS_COUNTER_GET(tx_poll_busy));
seq_printf(seq, "tx_poll_hit \t\t: %d\n", SDPSTATS_COUNTER_GET(tx_poll_hit));
seq_printf(seq, "CQ stats:\n");
seq_printf(seq, "- RX interrupts\t\t: %d\n", SDPSTATS_COUNTER_GET(rx_int_count));
seq_printf(seq, "- TX interrupts\t\t: %d\n", SDPSTATS_COUNTER_GET(tx_int_count));
seq_printf(seq, "ZCopy stats:\n");
seq_printf(seq, "- TX timeout\t\t: %d\n", SDPSTATS_COUNTER_GET(zcopy_tx_timeout));
seq_printf(seq, "- TX cross send\t\t: %d\n", SDPSTATS_COUNTER_GET(zcopy_cross_send));
seq_printf(seq, "- TX aborted by peer\t: %d\n", SDPSTATS_COUNTER_GET(zcopy_tx_aborted));
seq_printf(seq, "- TX error\t\t: %d\n", SDPSTATS_COUNTER_GET(zcopy_tx_error));
return 0;
}
static ssize_t sdpstats_write(struct file *file, const char __user *buf,
size_t count, loff_t *offs)
{
int i;
for_each_possible_cpu(i)
memset(&per_cpu(sdpstats, i), 0, sizeof(struct sdpstats));
printk(KERN_WARNING "Cleared sdp statistics\n");
return count;
}
static int sdpstats_seq_open(struct inode *inode, struct file *file)
{
return single_open(file, sdpstats_seq_show, NULL);
}
static struct file_operations sdpstats_fops = {
.owner = THIS_MODULE,
.open = sdpstats_seq_open,
.read = seq_read,
.write = sdpstats_write,
.llseek = seq_lseek,
.release = single_release,
};
#endif
#ifdef SDP_PROFILING
struct sdpprf_log sdpprf_log[SDPPRF_LOG_SIZE];
int sdpprf_log_count;
static unsigned long long start_t;
static int sdpprf_show(struct seq_file *m, void *v)
{
struct sdpprf_log *l = v;
unsigned long nsec_rem, t;
if (!sdpprf_log_count) {
seq_printf(m, "No performance logs\n");
goto out;
}
t = l->time - start_t;
nsec_rem = do_div(t, 1000000000);
seq_printf(m, "%-6d: [%5lu.%06lu] %-50s - [%d{%d} %d:%d] "
"mb: %p %s:%d\n",
l->idx, (unsigned long)t, nsec_rem/1000,
l->msg, l->pid, l->cpu, l->sk_num, l->sk_dport,
l->mb, l->func, l->line);
out:
return 0;
}
static void *sdpprf_start(struct seq_file *p, loff_t *pos)
{
int idx = *pos;
if (!*pos) {
if (!sdpprf_log_count)
return SEQ_START_TOKEN;
}
if (*pos >= MIN(sdpprf_log_count, SDPPRF_LOG_SIZE - 1))
return NULL;
if (sdpprf_log_count >= SDPPRF_LOG_SIZE - 1) {
int off = sdpprf_log_count & (SDPPRF_LOG_SIZE - 1);
idx = (idx + off) & (SDPPRF_LOG_SIZE - 1);
}
if (!start_t)
start_t = sdpprf_log[idx].time;
return &sdpprf_log[idx];
}
static void *sdpprf_next(struct seq_file *p, void *v, loff_t *pos)
{
struct sdpprf_log *l = v;
if (++*pos >= MIN(sdpprf_log_count, SDPPRF_LOG_SIZE - 1))
return NULL;
++l;
if (l - &sdpprf_log[0] >= SDPPRF_LOG_SIZE - 1)
return &sdpprf_log[0];
return l;
}
static void sdpprf_stop(struct seq_file *p, void *v)
{
}
static struct seq_operations sdpprf_ops = {
.start = sdpprf_start,
.stop = sdpprf_stop,
.next = sdpprf_next,
.show = sdpprf_show,
};
static int sdpprf_open(struct inode *inode, struct file *file)
{
int res;
res = seq_open(file, &sdpprf_ops);
return res;
}
static ssize_t sdpprf_write(struct file *file, const char __user *buf,
size_t count, loff_t *offs)
{
sdpprf_log_count = 0;
printk(KERN_INFO "Cleared sdpprf statistics\n");
return count;
}
static struct file_operations sdpprf_fops = {
.open = sdpprf_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
.write = sdpprf_write,
};
#endif /* SDP_PROFILING */
int __init sdp_proc_init(void)
{
struct proc_dir_entry *p = NULL;
#ifdef SDPSTATS_ON
struct proc_dir_entry *stats = NULL;
#endif
#ifdef SDP_PROFILING
struct proc_dir_entry *prof = NULL;
#endif
sdp_seq_afinfo.seq_fops->owner = sdp_seq_afinfo.owner;
sdp_seq_afinfo.seq_fops->open = sdp_seq_open;
sdp_seq_afinfo.seq_fops->read = seq_read;
sdp_seq_afinfo.seq_fops->llseek = seq_lseek;
sdp_seq_afinfo.seq_fops->release = seq_release_private;
p = proc_net_fops_create(&init_net, sdp_seq_afinfo.name, S_IRUGO,
sdp_seq_afinfo.seq_fops);
if (p)
p->data = &sdp_seq_afinfo;
else
goto no_mem;
#ifdef SDPSTATS_ON
stats = proc_net_fops_create(&init_net, PROC_SDP_STATS,
S_IRUGO | S_IWUGO, &sdpstats_fops);
if (!stats)
goto no_mem_stats;
#endif
#ifdef SDP_PROFILING
prof = proc_net_fops_create(&init_net, PROC_SDP_PERF,
S_IRUGO | S_IWUGO, &sdpprf_fops);
if (!prof)
goto no_mem_prof;
#endif
return 0;
#ifdef SDP_PROFILING
no_mem_prof:
#endif
#ifdef SDPSTATS_ON
proc_net_remove(&init_net, PROC_SDP_STATS);
no_mem_stats:
#endif
proc_net_remove(&init_net, sdp_seq_afinfo.name);
no_mem:
return -ENOMEM;
}
void sdp_proc_unregister(void)
{
proc_net_remove(&init_net, sdp_seq_afinfo.name);
memset(sdp_seq_afinfo.seq_fops, 0, sizeof(*sdp_seq_afinfo.seq_fops));
#ifdef SDPSTATS_ON
proc_net_remove(&init_net, PROC_SDP_STATS);
#endif
#ifdef SDP_PROFILING
proc_net_remove(&init_net, PROC_SDP_PERF);
#endif
}
#else /* CONFIG_PROC_FS */
int __init sdp_proc_init(void)
{
return 0;
}
void sdp_proc_unregister(void)
{
}
#endif /* CONFIG_PROC_FS */