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kcapi_proc.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 void *capi_driver_start(struct seq_file *seq, loff_t *pos)
{
      read_lock(&capi_drivers_list_lock);
      return seq_list_start(&capi_drivers, *pos);
}

static void *capi_driver_next(struct seq_file *seq, void *v, loff_t *pos)
{
      return seq_list_next(v, &capi_drivers, pos);
}

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 = list_entry(v, struct capi_driver, list);

      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);
}

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