forked from luck/tmp_suning_uos_patched
d54b1fdb1d
Many struct file_operations in the kernel can be "const". Marking them const moves these to the .rodata section, which avoids false sharing with potential dirty data. In addition it'll catch accidental writes at compile time to these shared resources. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
313 lines
8.6 KiB
C
313 lines
8.6 KiB
C
/*
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*
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* linux/drivers/s390/net/qeth_fs.c
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*
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* Linux on zSeries OSA Express and HiperSockets support
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* This file contains code related to procfs.
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*
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* Copyright 2000,2003 IBM Corporation
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*
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* Author(s): Thomas Spatzier <tspat@de.ibm.com>
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*
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/list.h>
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#include <linux/rwsem.h>
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#include "qeth.h"
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#include "qeth_mpc.h"
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#include "qeth_fs.h"
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/***** /proc/qeth *****/
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#define QETH_PROCFILE_NAME "qeth"
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static struct proc_dir_entry *qeth_procfile;
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static int
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qeth_procfile_seq_match(struct device *dev, void *data)
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{
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return(dev ? 1 : 0);
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}
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static void *
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qeth_procfile_seq_start(struct seq_file *s, loff_t *offset)
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{
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struct device *dev = NULL;
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loff_t nr = 0;
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down_read(&qeth_ccwgroup_driver.driver.bus->subsys.rwsem);
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if (*offset == 0)
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return SEQ_START_TOKEN;
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while (1) {
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dev = driver_find_device(&qeth_ccwgroup_driver.driver, dev,
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NULL, qeth_procfile_seq_match);
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if (++nr == *offset)
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break;
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put_device(dev);
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}
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return dev;
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}
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static void
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qeth_procfile_seq_stop(struct seq_file *s, void* it)
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{
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up_read(&qeth_ccwgroup_driver.driver.bus->subsys.rwsem);
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}
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static void *
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qeth_procfile_seq_next(struct seq_file *s, void *it, loff_t *offset)
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{
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struct device *prev, *next;
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if (it == SEQ_START_TOKEN)
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prev = NULL;
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else
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prev = (struct device *) it;
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next = driver_find_device(&qeth_ccwgroup_driver.driver,
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prev, NULL, qeth_procfile_seq_match);
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(*offset)++;
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return (void *) next;
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}
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static inline const char *
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qeth_get_router_str(struct qeth_card *card, int ipv)
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{
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enum qeth_routing_types routing_type = NO_ROUTER;
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if (ipv == 4) {
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routing_type = card->options.route4.type;
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} else {
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#ifdef CONFIG_QETH_IPV6
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routing_type = card->options.route6.type;
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#else
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return "n/a";
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#endif /* CONFIG_QETH_IPV6 */
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}
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switch (routing_type){
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case PRIMARY_ROUTER:
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return "pri";
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case SECONDARY_ROUTER:
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return "sec";
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case MULTICAST_ROUTER:
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if (card->info.broadcast_capable == QETH_BROADCAST_WITHOUT_ECHO)
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return "mc+";
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return "mc";
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case PRIMARY_CONNECTOR:
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if (card->info.broadcast_capable == QETH_BROADCAST_WITHOUT_ECHO)
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return "p+c";
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return "p.c";
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case SECONDARY_CONNECTOR:
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if (card->info.broadcast_capable == QETH_BROADCAST_WITHOUT_ECHO)
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return "s+c";
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return "s.c";
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default: /* NO_ROUTER */
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return "no";
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}
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}
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static int
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qeth_procfile_seq_show(struct seq_file *s, void *it)
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{
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struct device *device;
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struct qeth_card *card;
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char tmp[12]; /* for qeth_get_prioq_str */
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if (it == SEQ_START_TOKEN){
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seq_printf(s, "devices CHPID interface "
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"cardtype port chksum prio-q'ing rtr4 "
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"rtr6 fsz cnt\n");
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seq_printf(s, "-------------------------- ----- ---------- "
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"-------------- ---- ------ ---------- ---- "
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"---- ----- -----\n");
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} else {
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device = (struct device *) it;
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card = device->driver_data;
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seq_printf(s, "%s/%s/%s x%02X %-10s %-14s %-4i ",
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CARD_RDEV_ID(card),
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CARD_WDEV_ID(card),
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CARD_DDEV_ID(card),
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card->info.chpid,
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QETH_CARD_IFNAME(card),
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qeth_get_cardname_short(card),
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card->info.portno);
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if (card->lan_online)
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seq_printf(s, "%-6s %-10s %-4s %-4s %-5s %-5i\n",
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qeth_get_checksum_str(card),
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qeth_get_prioq_str(card, tmp),
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qeth_get_router_str(card, 4),
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qeth_get_router_str(card, 6),
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qeth_get_bufsize_str(card),
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card->qdio.in_buf_pool.buf_count);
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else
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seq_printf(s, " +++ LAN OFFLINE +++\n");
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put_device(device);
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}
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return 0;
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}
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static struct seq_operations qeth_procfile_seq_ops = {
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.start = qeth_procfile_seq_start,
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.stop = qeth_procfile_seq_stop,
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.next = qeth_procfile_seq_next,
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.show = qeth_procfile_seq_show,
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};
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static int
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qeth_procfile_open(struct inode *inode, struct file *file)
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{
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return seq_open(file, &qeth_procfile_seq_ops);
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}
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static const struct file_operations qeth_procfile_fops = {
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.owner = THIS_MODULE,
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.open = qeth_procfile_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release,
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};
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/***** /proc/qeth_perf *****/
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#define QETH_PERF_PROCFILE_NAME "qeth_perf"
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static struct proc_dir_entry *qeth_perf_procfile;
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static int
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qeth_perf_procfile_seq_show(struct seq_file *s, void *it)
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{
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struct device *device;
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struct qeth_card *card;
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if (it == SEQ_START_TOKEN)
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return 0;
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device = (struct device *) it;
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card = device->driver_data;
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seq_printf(s, "For card with devnos %s/%s/%s (%s):\n",
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CARD_RDEV_ID(card),
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CARD_WDEV_ID(card),
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CARD_DDEV_ID(card),
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QETH_CARD_IFNAME(card)
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);
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if (!card->options.performance_stats)
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seq_printf(s, "Performance statistics are deactivated.\n");
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seq_printf(s, " Skb's/buffers received : %lu/%u\n"
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" Skb's/buffers sent : %lu/%u\n\n",
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card->stats.rx_packets -
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card->perf_stats.initial_rx_packets,
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card->perf_stats.bufs_rec,
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card->stats.tx_packets -
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card->perf_stats.initial_tx_packets,
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card->perf_stats.bufs_sent
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);
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seq_printf(s, " Skb's/buffers sent without packing : %lu/%u\n"
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" Skb's/buffers sent with packing : %u/%u\n\n",
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card->stats.tx_packets - card->perf_stats.initial_tx_packets
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- card->perf_stats.skbs_sent_pack,
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card->perf_stats.bufs_sent - card->perf_stats.bufs_sent_pack,
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card->perf_stats.skbs_sent_pack,
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card->perf_stats.bufs_sent_pack
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);
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seq_printf(s, " Skbs sent in SG mode : %u\n"
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" Skb fragments sent in SG mode : %u\n\n",
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card->perf_stats.sg_skbs_sent,
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card->perf_stats.sg_frags_sent);
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seq_printf(s, " large_send tx (in Kbytes) : %u\n"
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" large_send count : %u\n\n",
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card->perf_stats.large_send_bytes >> 10,
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card->perf_stats.large_send_cnt);
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seq_printf(s, " Packing state changes no pkg.->packing : %u/%u\n"
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" Watermarks L/H : %i/%i\n"
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" Current buffer usage (outbound q's) : "
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"%i/%i/%i/%i\n\n",
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card->perf_stats.sc_dp_p, card->perf_stats.sc_p_dp,
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QETH_LOW_WATERMARK_PACK, QETH_HIGH_WATERMARK_PACK,
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atomic_read(&card->qdio.out_qs[0]->used_buffers),
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(card->qdio.no_out_queues > 1)?
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atomic_read(&card->qdio.out_qs[1]->used_buffers)
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: 0,
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(card->qdio.no_out_queues > 2)?
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atomic_read(&card->qdio.out_qs[2]->used_buffers)
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: 0,
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(card->qdio.no_out_queues > 3)?
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atomic_read(&card->qdio.out_qs[3]->used_buffers)
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: 0
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);
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seq_printf(s, " Inbound handler time (in us) : %u\n"
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" Inbound handler count : %u\n"
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" Inbound do_QDIO time (in us) : %u\n"
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" Inbound do_QDIO count : %u\n\n"
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" Outbound handler time (in us) : %u\n"
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" Outbound handler count : %u\n\n"
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" Outbound time (in us, incl QDIO) : %u\n"
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" Outbound count : %u\n"
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" Outbound do_QDIO time (in us) : %u\n"
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" Outbound do_QDIO count : %u\n\n",
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card->perf_stats.inbound_time,
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card->perf_stats.inbound_cnt,
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card->perf_stats.inbound_do_qdio_time,
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card->perf_stats.inbound_do_qdio_cnt,
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card->perf_stats.outbound_handler_time,
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card->perf_stats.outbound_handler_cnt,
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card->perf_stats.outbound_time,
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card->perf_stats.outbound_cnt,
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card->perf_stats.outbound_do_qdio_time,
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card->perf_stats.outbound_do_qdio_cnt
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);
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put_device(device);
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return 0;
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}
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static struct seq_operations qeth_perf_procfile_seq_ops = {
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.start = qeth_procfile_seq_start,
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.stop = qeth_procfile_seq_stop,
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.next = qeth_procfile_seq_next,
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.show = qeth_perf_procfile_seq_show,
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};
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static int
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qeth_perf_procfile_open(struct inode *inode, struct file *file)
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{
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return seq_open(file, &qeth_perf_procfile_seq_ops);
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}
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static const struct file_operations qeth_perf_procfile_fops = {
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.owner = THIS_MODULE,
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.open = qeth_perf_procfile_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release,
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};
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int __init
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qeth_create_procfs_entries(void)
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{
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qeth_procfile = create_proc_entry(QETH_PROCFILE_NAME,
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S_IFREG | 0444, NULL);
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if (qeth_procfile)
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qeth_procfile->proc_fops = &qeth_procfile_fops;
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qeth_perf_procfile = create_proc_entry(QETH_PERF_PROCFILE_NAME,
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S_IFREG | 0444, NULL);
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if (qeth_perf_procfile)
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qeth_perf_procfile->proc_fops = &qeth_perf_procfile_fops;
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if (qeth_procfile &&
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qeth_perf_procfile)
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return 0;
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else
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return -ENOMEM;
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}
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void __exit
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qeth_remove_procfs_entries(void)
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{
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if (qeth_procfile)
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remove_proc_entry(QETH_PROCFILE_NAME, NULL);
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if (qeth_perf_procfile)
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remove_proc_entry(QETH_PERF_PROCFILE_NAME, NULL);
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}
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