linux/drivers/isdn/capi/kcapi_proc.c
Arjan van de Ven 2b8693c061 [PATCH] mark struct file_operations const 3
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>
2007-02-12 09:48:45 -08:00

336 lines
7.5 KiB
C

/*
* Kernel CAPI 2.0 Module - /proc/capi handling
*
* Copyright 1999 by Carsten Paeth <calle@calle.de>
* Copyright 2002 by Kai Germaschewski <kai@germaschewski.name>
*
* This software may be used and distributed according to the terms
* of the GNU General Public License, incorporated herein by reference.
*
*/
#include "kcapi.h"
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/init.h>
static char *
cardstate2str(unsigned short cardstate)
{
switch (cardstate) {
case CARD_DETECTED: return "detected";
case CARD_LOADING: return "loading";
case CARD_RUNNING: return "running";
default: return "???";
}
}
// /proc/capi
// ===========================================================================
// /proc/capi/controller:
// cnr driver cardstate name driverinfo
// /proc/capi/contrstats:
// cnr nrecvctlpkt nrecvdatapkt nsentctlpkt nsentdatapkt
// ---------------------------------------------------------------------------
static void *controller_start(struct seq_file *seq, loff_t *pos)
{
if (*pos < CAPI_MAXCONTR)
return &capi_cards[*pos];
return NULL;
}
static void *controller_next(struct seq_file *seq, void *v, loff_t *pos)
{
++*pos;
if (*pos < CAPI_MAXCONTR)
return &capi_cards[*pos];
return NULL;
}
static void controller_stop(struct seq_file *seq, void *v)
{
}
static int controller_show(struct seq_file *seq, void *v)
{
struct capi_ctr *ctr = *(struct capi_ctr **) v;
if (!ctr)
return 0;
seq_printf(seq, "%d %-10s %-8s %-16s %s\n",
ctr->cnr, ctr->driver_name,
cardstate2str(ctr->cardstate),
ctr->name,
ctr->procinfo ? ctr->procinfo(ctr) : "");
return 0;
}
static int contrstats_show(struct seq_file *seq, void *v)
{
struct capi_ctr *ctr = *(struct capi_ctr **) v;
if (!ctr)
return 0;
seq_printf(seq, "%d %lu %lu %lu %lu\n",
ctr->cnr,
ctr->nrecvctlpkt,
ctr->nrecvdatapkt,
ctr->nsentctlpkt,
ctr->nsentdatapkt);
return 0;
}
static struct seq_operations seq_controller_ops = {
.start = controller_start,
.next = controller_next,
.stop = controller_stop,
.show = controller_show,
};
static struct seq_operations seq_contrstats_ops = {
.start = controller_start,
.next = controller_next,
.stop = controller_stop,
.show = contrstats_show,
};
static int seq_controller_open(struct inode *inode, struct file *file)
{
return seq_open(file, &seq_controller_ops);
}
static int seq_contrstats_open(struct inode *inode, struct file *file)
{
return seq_open(file, &seq_contrstats_ops);
}
static const struct file_operations proc_controller_ops = {
.open = seq_controller_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
};
static const struct file_operations proc_contrstats_ops = {
.open = seq_contrstats_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
};
// /proc/capi/applications:
// applid l3cnt dblkcnt dblklen #ncci recvqueuelen
// /proc/capi/applstats:
// applid nrecvctlpkt nrecvdatapkt nsentctlpkt nsentdatapkt
// ---------------------------------------------------------------------------
static void *
applications_start(struct seq_file *seq, loff_t *pos)
{
if (*pos < CAPI_MAXAPPL)
return &capi_applications[*pos];
return NULL;
}
static void *
applications_next(struct seq_file *seq, void *v, loff_t *pos)
{
++*pos;
if (*pos < CAPI_MAXAPPL)
return &capi_applications[*pos];
return NULL;
}
static void
applications_stop(struct seq_file *seq, void *v)
{
}
static int
applications_show(struct seq_file *seq, void *v)
{
struct capi20_appl *ap = *(struct capi20_appl **) v;
if (!ap)
return 0;
seq_printf(seq, "%u %d %d %d\n",
ap->applid,
ap->rparam.level3cnt,
ap->rparam.datablkcnt,
ap->rparam.datablklen);
return 0;
}
static int
applstats_show(struct seq_file *seq, void *v)
{
struct capi20_appl *ap = *(struct capi20_appl **) v;
if (!ap)
return 0;
seq_printf(seq, "%u %lu %lu %lu %lu\n",
ap->applid,
ap->nrecvctlpkt,
ap->nrecvdatapkt,
ap->nsentctlpkt,
ap->nsentdatapkt);
return 0;
}
static struct seq_operations seq_applications_ops = {
.start = applications_start,
.next = applications_next,
.stop = applications_stop,
.show = applications_show,
};
static struct seq_operations seq_applstats_ops = {
.start = applications_start,
.next = applications_next,
.stop = applications_stop,
.show = applstats_show,
};
static int
seq_applications_open(struct inode *inode, struct file *file)
{
return seq_open(file, &seq_applications_ops);
}
static int
seq_applstats_open(struct inode *inode, struct file *file)
{
return seq_open(file, &seq_applstats_ops);
}
static const struct file_operations proc_applications_ops = {
.open = seq_applications_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
};
static const struct file_operations proc_applstats_ops = {
.open = seq_applstats_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
};
static void
create_seq_entry(char *name, mode_t mode, const struct file_operations *f)
{
struct proc_dir_entry *entry;
entry = create_proc_entry(name, mode, NULL);
if (entry)
entry->proc_fops = f;
}
// ---------------------------------------------------------------------------
static __inline__ struct capi_driver *capi_driver_get_idx(loff_t pos)
{
struct capi_driver *drv = NULL;
struct list_head *l;
loff_t i;
i = 0;
list_for_each(l, &capi_drivers) {
drv = list_entry(l, struct capi_driver, list);
if (i++ == pos)
return drv;
}
return NULL;
}
static void *capi_driver_start(struct seq_file *seq, loff_t *pos)
{
struct capi_driver *drv;
read_lock(&capi_drivers_list_lock);
drv = capi_driver_get_idx(*pos);
return drv;
}
static void *capi_driver_next(struct seq_file *seq, void *v, loff_t *pos)
{
struct capi_driver *drv = (struct capi_driver *)v;
++*pos;
if (drv->list.next == &capi_drivers) return NULL;
return list_entry(drv->list.next, struct capi_driver, list);
}
static void capi_driver_stop(struct seq_file *seq, void *v)
{
read_unlock(&capi_drivers_list_lock);
}
static int capi_driver_show(struct seq_file *seq, void *v)
{
struct capi_driver *drv = (struct capi_driver *)v;
seq_printf(seq, "%-32s %s\n", drv->name, drv->revision);
return 0;
}
static struct seq_operations seq_capi_driver_ops = {
.start = capi_driver_start,
.next = capi_driver_next,
.stop = capi_driver_stop,
.show = capi_driver_show,
};
static int
seq_capi_driver_open(struct inode *inode, struct file *file)
{
int err;
err = seq_open(file, &seq_capi_driver_ops);
return err;
}
static const struct file_operations proc_driver_ops = {
.open = seq_capi_driver_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
};
// ---------------------------------------------------------------------------
void __init
kcapi_proc_init(void)
{
proc_mkdir("capi", NULL);
proc_mkdir("capi/controllers", NULL);
create_seq_entry("capi/controller", 0, &proc_controller_ops);
create_seq_entry("capi/contrstats", 0, &proc_contrstats_ops);
create_seq_entry("capi/applications", 0, &proc_applications_ops);
create_seq_entry("capi/applstats", 0, &proc_applstats_ops);
create_seq_entry("capi/driver", 0, &proc_driver_ops);
}
void __exit
kcapi_proc_exit(void)
{
remove_proc_entry("capi/driver", NULL);
remove_proc_entry("capi/controller", NULL);
remove_proc_entry("capi/contrstats", NULL);
remove_proc_entry("capi/applications", NULL);
remove_proc_entry("capi/applstats", NULL);
remove_proc_entry("capi/controllers", NULL);
remove_proc_entry("capi", NULL);
}