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linux/drivers/s390/net/qeth_proc.c
Frank Pavlic 09d2d38a15 [PATCH] s390: qeth driver fixes [4/6] 
[PATCH 7/9] s390: qeth driver fixes [4/6]

From: Frank Pavlic <fpavlic@de.ibm.com>
	- fix kernel crash due to race,
	  set card->state to SOFTSETUP after
	  card and card->dev are initialized properly.
	- remove CONFIG_QETH_PERF_STATS, use sysfs attribute instead,
	  as we want to have the ability to turn on/off the
	  statistics at runtime.

Signed-off-by: Frank Pavlic <fpavlic@de.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-09-17 01:03:07 -04:00

313 lines
8.6 KiB
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/*
*
* linux/drivers/s390/net/qeth_fs.c
*
* Linux on zSeries OSA Express and HiperSockets support
* This file contains code related to procfs.
*
* Copyright 2000,2003 IBM Corporation
*
* Author(s): Thomas Spatzier <tspat@de.ibm.com>
*
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/list.h>
#include <linux/rwsem.h>
#include "qeth.h"
#include "qeth_mpc.h"
#include "qeth_fs.h"
/***** /proc/qeth *****/
#define QETH_PROCFILE_NAME "qeth"
static struct proc_dir_entry *qeth_procfile;
static int
qeth_procfile_seq_match(struct device *dev, void *data)
{
return(dev ? 1 : 0);
}
static void *
qeth_procfile_seq_start(struct seq_file *s, loff_t *offset)
{
struct device *dev = NULL;
loff_t nr = 0;
down_read(&qeth_ccwgroup_driver.driver.bus->subsys.rwsem);
if (*offset == 0)
return SEQ_START_TOKEN;
while (1) {
dev = driver_find_device(&qeth_ccwgroup_driver.driver, dev,
NULL, qeth_procfile_seq_match);
if (++nr == *offset)
break;
put_device(dev);
}
return dev;
}
static void
qeth_procfile_seq_stop(struct seq_file *s, void* it)
{
up_read(&qeth_ccwgroup_driver.driver.bus->subsys.rwsem);
}
static void *
qeth_procfile_seq_next(struct seq_file *s, void *it, loff_t *offset)
{
struct device *prev, *next;
if (it == SEQ_START_TOKEN)
prev = NULL;
else
prev = (struct device *) it;
next = driver_find_device(&qeth_ccwgroup_driver.driver,
prev, NULL, qeth_procfile_seq_match);
(*offset)++;
return (void *) next;
}
static inline const char *
qeth_get_router_str(struct qeth_card *card, int ipv)
{
enum qeth_routing_types routing_type = NO_ROUTER;
if (ipv == 4) {
routing_type = card->options.route4.type;
} else {
#ifdef CONFIG_QETH_IPV6
routing_type = card->options.route6.type;
#else
return "n/a";
#endif /* CONFIG_QETH_IPV6 */
}
switch (routing_type){
case PRIMARY_ROUTER:
return "pri";
case SECONDARY_ROUTER:
return "sec";
case MULTICAST_ROUTER:
if (card->info.broadcast_capable == QETH_BROADCAST_WITHOUT_ECHO)
return "mc+";
return "mc";
case PRIMARY_CONNECTOR:
if (card->info.broadcast_capable == QETH_BROADCAST_WITHOUT_ECHO)
return "p+c";
return "p.c";
case SECONDARY_CONNECTOR:
if (card->info.broadcast_capable == QETH_BROADCAST_WITHOUT_ECHO)
return "s+c";
return "s.c";
default: /* NO_ROUTER */
return "no";
}
}
static int
qeth_procfile_seq_show(struct seq_file *s, void *it)
{
struct device *device;
struct qeth_card *card;
char tmp[12]; /* for qeth_get_prioq_str */
if (it == SEQ_START_TOKEN){
seq_printf(s, "devices CHPID interface "
"cardtype port chksum prio-q'ing rtr4 "
"rtr6 fsz cnt\n");
seq_printf(s, "-------------------------- ----- ---------- "
"-------------- ---- ------ ---------- ---- "
"---- ----- -----\n");
} else {
device = (struct device *) it;
card = device->driver_data;
seq_printf(s, "%s/%s/%s x%02X %-10s %-14s %-4i ",
CARD_RDEV_ID(card),
CARD_WDEV_ID(card),
CARD_DDEV_ID(card),
card->info.chpid,
QETH_CARD_IFNAME(card),
qeth_get_cardname_short(card),
card->info.portno);
if (card->lan_online)
seq_printf(s, "%-6s %-10s %-4s %-4s %-5s %-5i\n",
qeth_get_checksum_str(card),
qeth_get_prioq_str(card, tmp),
qeth_get_router_str(card, 4),
qeth_get_router_str(card, 6),
qeth_get_bufsize_str(card),
card->qdio.in_buf_pool.buf_count);
else
seq_printf(s, " +++ LAN OFFLINE +++\n");
put_device(device);
}
return 0;
}
static struct seq_operations qeth_procfile_seq_ops = {
.start = qeth_procfile_seq_start,
.stop = qeth_procfile_seq_stop,
.next = qeth_procfile_seq_next,
.show = qeth_procfile_seq_show,
};
static int
qeth_procfile_open(struct inode *inode, struct file *file)
{
return seq_open(file, &qeth_procfile_seq_ops);
}
static struct file_operations qeth_procfile_fops = {
.owner = THIS_MODULE,
.open = qeth_procfile_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
};
/***** /proc/qeth_perf *****/
#define QETH_PERF_PROCFILE_NAME "qeth_perf"
static struct proc_dir_entry *qeth_perf_procfile;
static int
qeth_perf_procfile_seq_show(struct seq_file *s, void *it)
{
struct device *device;
struct qeth_card *card;
if (it == SEQ_START_TOKEN)
return 0;
device = (struct device *) it;
card = device->driver_data;
seq_printf(s, "For card with devnos %s/%s/%s (%s):\n",
CARD_RDEV_ID(card),
CARD_WDEV_ID(card),
CARD_DDEV_ID(card),
QETH_CARD_IFNAME(card)
);
if (!card->options.performance_stats)
seq_printf(s, "Performance statistics are deactivated.\n");
seq_printf(s, " Skb's/buffers received : %lu/%u\n"
" Skb's/buffers sent : %lu/%u\n\n",
card->stats.rx_packets -
card->perf_stats.initial_rx_packets,
card->perf_stats.bufs_rec,
card->stats.tx_packets -
card->perf_stats.initial_tx_packets,
card->perf_stats.bufs_sent
);
seq_printf(s, " Skb's/buffers sent without packing : %lu/%u\n"
" Skb's/buffers sent with packing : %u/%u\n\n",
card->stats.tx_packets - card->perf_stats.initial_tx_packets
- card->perf_stats.skbs_sent_pack,
card->perf_stats.bufs_sent - card->perf_stats.bufs_sent_pack,
card->perf_stats.skbs_sent_pack,
card->perf_stats.bufs_sent_pack
);
seq_printf(s, " Skbs sent in SG mode : %u\n"
" Skb fragments sent in SG mode : %u\n\n",
card->perf_stats.sg_skbs_sent,
card->perf_stats.sg_frags_sent);
seq_printf(s, " large_send tx (in Kbytes) : %u\n"
" large_send count : %u\n\n",
card->perf_stats.large_send_bytes >> 10,
card->perf_stats.large_send_cnt);
seq_printf(s, " Packing state changes no pkg.->packing : %u/%u\n"
" Watermarks L/H : %i/%i\n"
" Current buffer usage (outbound q's) : "
"%i/%i/%i/%i\n\n",
card->perf_stats.sc_dp_p, card->perf_stats.sc_p_dp,
QETH_LOW_WATERMARK_PACK, QETH_HIGH_WATERMARK_PACK,
atomic_read(&card->qdio.out_qs[0]->used_buffers),
(card->qdio.no_out_queues > 1)?
atomic_read(&card->qdio.out_qs[1]->used_buffers)
: 0,
(card->qdio.no_out_queues > 2)?
atomic_read(&card->qdio.out_qs[2]->used_buffers)
: 0,
(card->qdio.no_out_queues > 3)?
atomic_read(&card->qdio.out_qs[3]->used_buffers)
: 0
);
seq_printf(s, " Inbound handler time (in us) : %u\n"
" Inbound handler count : %u\n"
" Inbound do_QDIO time (in us) : %u\n"
" Inbound do_QDIO count : %u\n\n"
" Outbound handler time (in us) : %u\n"
" Outbound handler count : %u\n\n"
" Outbound time (in us, incl QDIO) : %u\n"
" Outbound count : %u\n"
" Outbound do_QDIO time (in us) : %u\n"
" Outbound do_QDIO count : %u\n\n",
card->perf_stats.inbound_time,
card->perf_stats.inbound_cnt,
card->perf_stats.inbound_do_qdio_time,
card->perf_stats.inbound_do_qdio_cnt,
card->perf_stats.outbound_handler_time,
card->perf_stats.outbound_handler_cnt,
card->perf_stats.outbound_time,
card->perf_stats.outbound_cnt,
card->perf_stats.outbound_do_qdio_time,
card->perf_stats.outbound_do_qdio_cnt
);
put_device(device);
return 0;
}
static struct seq_operations qeth_perf_procfile_seq_ops = {
.start = qeth_procfile_seq_start,
.stop = qeth_procfile_seq_stop,
.next = qeth_procfile_seq_next,
.show = qeth_perf_procfile_seq_show,
};
static int
qeth_perf_procfile_open(struct inode *inode, struct file *file)
{
return seq_open(file, &qeth_perf_procfile_seq_ops);
}
static struct file_operations qeth_perf_procfile_fops = {
.owner = THIS_MODULE,
.open = qeth_perf_procfile_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
};
int __init
qeth_create_procfs_entries(void)
{
qeth_procfile = create_proc_entry(QETH_PROCFILE_NAME,
S_IFREG | 0444, NULL);
if (qeth_procfile)
qeth_procfile->proc_fops = &qeth_procfile_fops;
qeth_perf_procfile = create_proc_entry(QETH_PERF_PROCFILE_NAME,
S_IFREG | 0444, NULL);
if (qeth_perf_procfile)
qeth_perf_procfile->proc_fops = &qeth_perf_procfile_fops;
if (qeth_procfile &&
qeth_perf_procfile)
return 0;
else
return -ENOMEM;
}
void __exit
qeth_remove_procfs_entries(void)
{
if (qeth_procfile)
remove_proc_entry(QETH_PROCFILE_NAME, NULL);
if (qeth_perf_procfile)
remove_proc_entry(QETH_PERF_PROCFILE_NAME, NULL);
}
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