1 files changed, 514 insertions, 0 deletions

diff --git a/net/atm/proc.c b/net/atm/proc.c
new file mode 100644
index 000000000000..4041054e5282
--- /dev/null
+++ b/net/atm/proc.c
@@ -0,0 +1,514 @@
+/* net/atm/proc.c - ATM /proc interface
+ *
+ * Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA
+ *
+ * seq_file api usage by romieu@fr.zoreil.com
+ *
+ * Evaluating the efficiency of the whole thing if left as an exercise to
+ * the reader.
+ */
+
+#include <linux/config.h>
+#include <linux/module.h> /* for EXPORT_SYMBOL */
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/fs.h>
+#include <linux/stat.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/errno.h>
+#include <linux/atm.h>
+#include <linux/atmdev.h>
+#include <linux/netdevice.h>
+#include <linux/atmclip.h>
+#include <linux/init.h> /* for __init */
+#include <net/atmclip.h>
+#include <asm/uaccess.h>
+#include <asm/atomic.h>
+#include <asm/param.h> /* for HZ */
+#include "resources.h"
+#include "common.h" /* atm_proc_init prototype */
+#include "signaling.h" /* to get sigd - ugly too */
+
+static ssize_t proc_dev_atm_read(struct file *file,char __user *buf,size_t count,
+    loff_t *pos);
+
+static struct file_operations proc_atm_dev_ops = {
+        .owner =        THIS_MODULE,
+        .read =         proc_dev_atm_read,
+};
+
+static void add_stats(struct seq_file *seq, const char *aal,
+  const struct k_atm_aal_stats *stats)
+{
+        seq_printf(seq, "%s ( %d %d %d %d %d )", aal,
+            atomic_read(&stats->tx),atomic_read(&stats->tx_err),
+            atomic_read(&stats->rx),atomic_read(&stats->rx_err),
+            atomic_read(&stats->rx_drop));
+}
+
+static void atm_dev_info(struct seq_file *seq, const struct atm_dev *dev)
+{
+        int i;
+
+        seq_printf(seq, "%3d %-8s", dev->number, dev->type);
+        for (i = 0; i < ESI_LEN; i++)
+                seq_printf(seq, "%02x", dev->esi[i]);
+        seq_puts(seq, "  ");
+        add_stats(seq, "0", &dev->stats.aal0);
+        seq_puts(seq, "  ");
+        add_stats(seq, "5", &dev->stats.aal5);
+        seq_printf(seq, "\t[%d]", atomic_read(&dev->refcnt));
+        seq_putc(seq, '\n');
+}
+
+struct vcc_state {
+        int bucket;
+        struct sock *sk;
+        int family;
+};
+
+static inline int compare_family(struct sock *sk, int family)
+{
+        return !family || (sk->sk_family == family);
+}
+
+static int __vcc_walk(struct sock **sock, int family, int *bucket, loff_t l)
+{
+        struct sock *sk = *sock;
+
+        if (sk == (void *)1) {
+                for (*bucket = 0; *bucket < VCC_HTABLE_SIZE; ++*bucket) {
+                        struct hlist_head *head = &vcc_hash[*bucket];
+
+                        sk = hlist_empty(head) ? NULL : __sk_head(head);
+                        if (sk)
+                                break;
+                }
+                l--;
+        } 
+try_again:
+        for (; sk; sk = sk_next(sk)) {
+                l -= compare_family(sk, family);
+                if (l < 0)
+                        goto out;
+        }
+        if (!sk && ++*bucket < VCC_HTABLE_SIZE) {
+                sk = sk_head(&vcc_hash[*bucket]);
+                goto try_again;
+        }
+        sk = (void *)1;
+out:
+        *sock = sk;
+        return (l < 0);
+}
+
+static inline void *vcc_walk(struct vcc_state *state, loff_t l)
+{
+        return __vcc_walk(&state->sk, state->family, &state->bucket, l) ?
+               state : NULL;
+}
+
+static int __vcc_seq_open(struct inode *inode, struct file *file,
+        int family, struct seq_operations *ops)
+{
+        struct vcc_state *state;
+        struct seq_file *seq;
+        int rc = -ENOMEM;
+
+        state = kmalloc(sizeof(*state), GFP_KERNEL);
+        if (!state)
+                goto out;
+
+        rc = seq_open(file, ops);
+        if (rc)
+                goto out_kfree;
+
+        state->family = family;
+
+        seq = file->private_data;
+        seq->private = state;
+out:
+        return rc;
+out_kfree:
+        kfree(state);
+        goto out;
+}
+
+static int vcc_seq_release(struct inode *inode, struct file *file)
+{
+        return seq_release_private(inode, file);
+}
+
+static void *vcc_seq_start(struct seq_file *seq, loff_t *pos)
+{
+        struct vcc_state *state = seq->private;
+        loff_t left = *pos;
+
+        read_lock(&vcc_sklist_lock);
+        state->sk = (void *)1;
+        return left ? vcc_walk(state, left) : (void *)1;
+}
+
+static void vcc_seq_stop(struct seq_file *seq, void *v)
+{
+        read_unlock(&vcc_sklist_lock);
+}
+
+static void *vcc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+        struct vcc_state *state = seq->private;
+
+        v = vcc_walk(state, 1);
+        *pos += !!PTR_ERR(v);
+        return v;
+}
+
+static void pvc_info(struct seq_file *seq, struct atm_vcc *vcc)
+{
+        static const char *class_name[] = { "off","UBR","CBR","VBR","ABR" };
+        static const char *aal_name[] = {
+                "---",  "1",    "2",    "3/4",  /*  0- 3 */
+                "???",  "5",    "???",  "???",  /*  4- 7 */
+                "???",  "???",  "???",  "???",  /*  8-11 */
+                "???",  "0",    "???",  "???"}; /* 12-15 */
+
+        seq_printf(seq, "%3d %3d %5d %-3s %7d %-5s %7d %-6s",
+            vcc->dev->number,vcc->vpi,vcc->vci,
+            vcc->qos.aal >= sizeof(aal_name)/sizeof(aal_name[0]) ? "err" :
+            aal_name[vcc->qos.aal],vcc->qos.rxtp.min_pcr,
+            class_name[vcc->qos.rxtp.traffic_class],vcc->qos.txtp.min_pcr,
+            class_name[vcc->qos.txtp.traffic_class]);
+        if (test_bit(ATM_VF_IS_CLIP, &vcc->flags)) {
+                struct clip_vcc *clip_vcc = CLIP_VCC(vcc);
+                struct net_device *dev;
+
+                dev = clip_vcc->entry ? clip_vcc->entry->neigh->dev : NULL;
+                seq_printf(seq, "CLIP, Itf:%s, Encap:",
+                    dev ? dev->name : "none?");
+                seq_printf(seq, "%s", clip_vcc->encap ? "LLC/SNAP" : "None");
+        }
+        seq_putc(seq, '\n');
+}
+
+static const char *vcc_state(struct atm_vcc *vcc)
+{
+        static const char *map[] = { ATM_VS2TXT_MAP };
+
+        return map[ATM_VF2VS(vcc->flags)];
+}
+
+static void vcc_info(struct seq_file *seq, struct atm_vcc *vcc)
+{
+        struct sock *sk = sk_atm(vcc);
+
+        seq_printf(seq, "%p ", vcc);
+        if (!vcc->dev)
+                seq_printf(seq, "Unassigned    ");
+        else 
+                seq_printf(seq, "%3d %3d %5d ", vcc->dev->number, vcc->vpi,
+                        vcc->vci);
+        switch (sk->sk_family) {
+                case AF_ATMPVC:
+                        seq_printf(seq, "PVC");
+                        break;
+                case AF_ATMSVC:
+                        seq_printf(seq, "SVC");
+                        break;
+                default:
+                        seq_printf(seq, "%3d", sk->sk_family);
+        }
+        seq_printf(seq, " %04lx  %5d %7d/%7d %7d/%7d [%d]\n", vcc->flags, sk->sk_err,
+                  atomic_read(&sk->sk_wmem_alloc), sk->sk_sndbuf,
+                  atomic_read(&sk->sk_rmem_alloc), sk->sk_rcvbuf,
+                  atomic_read(&sk->sk_refcnt));
+}
+
+static void svc_info(struct seq_file *seq, struct atm_vcc *vcc)
+{
+        if (!vcc->dev)
+                seq_printf(seq, sizeof(void *) == 4 ?
+                           "N/A@%p%10s" : "N/A@%p%2s", vcc, "");
+        else
+                seq_printf(seq, "%3d %3d %5d         ",
+                           vcc->dev->number, vcc->vpi, vcc->vci);
+        seq_printf(seq, "%-10s ", vcc_state(vcc));
+        seq_printf(seq, "%s%s", vcc->remote.sas_addr.pub,
+            *vcc->remote.sas_addr.pub && *vcc->remote.sas_addr.prv ? "+" : "");
+        if (*vcc->remote.sas_addr.prv) {
+                int i;
+
+                for (i = 0; i < ATM_ESA_LEN; i++)
+                        seq_printf(seq, "%02x", vcc->remote.sas_addr.prv[i]);
+        }
+        seq_putc(seq, '\n');
+}
+
+static int atm_dev_seq_show(struct seq_file *seq, void *v)
+{
+        static char atm_dev_banner[] =
+                "Itf Type    ESI/\"MAC\"addr "
+                "AAL(TX,err,RX,err,drop) ...               [refcnt]\n";
+ 
+        if (v == (void *)1)
+                seq_puts(seq, atm_dev_banner);
+        else {
+                struct atm_dev *dev = list_entry(v, struct atm_dev, dev_list);
+
+                atm_dev_info(seq, dev);
+        }
+        return 0;
+}
+ 
+static struct seq_operations atm_dev_seq_ops = {
+        .start  = atm_dev_seq_start,
+        .next   = atm_dev_seq_next,
+        .stop   = atm_dev_seq_stop,
+        .show   = atm_dev_seq_show,
+};
+ 
+static int atm_dev_seq_open(struct inode *inode, struct file *file)
+{
+        return seq_open(file, &atm_dev_seq_ops);
+}
+ 
+static struct file_operations devices_seq_fops = {
+        .open           = atm_dev_seq_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = seq_release,
+};
+
+static int pvc_seq_show(struct seq_file *seq, void *v)
+{
+        static char atm_pvc_banner[] = 
+                "Itf VPI VCI   AAL RX(PCR,Class) TX(PCR,Class)\n";
+
+        if (v == (void *)1)
+                seq_puts(seq, atm_pvc_banner);
+        else {
+                struct vcc_state *state = seq->private;
+                struct atm_vcc *vcc = atm_sk(state->sk);
+
+                pvc_info(seq, vcc);
+        }
+        return 0;
+}
+
+static struct seq_operations pvc_seq_ops = {
+        .start  = vcc_seq_start,
+        .next   = vcc_seq_next,
+        .stop   = vcc_seq_stop,
+        .show   = pvc_seq_show,
+};
+
+static int pvc_seq_open(struct inode *inode, struct file *file)
+{
+        return __vcc_seq_open(inode, file, PF_ATMPVC, &pvc_seq_ops);
+}
+
+static struct file_operations pvc_seq_fops = {
+        .open           = pvc_seq_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = vcc_seq_release,
+};
+
+static int vcc_seq_show(struct seq_file *seq, void *v)
+{
+        if (v == (void *)1) {
+                seq_printf(seq, sizeof(void *) == 4 ? "%-8s%s" : "%-16s%s",
+                        "Address ", "Itf VPI VCI   Fam Flags Reply "
+                        "Send buffer     Recv buffer      [refcnt]\n");
+        } else {
+                struct vcc_state *state = seq->private;
+                struct atm_vcc *vcc = atm_sk(state->sk);
+  
+                vcc_info(seq, vcc);
+        }
+        return 0;
+}
+  
+static struct seq_operations vcc_seq_ops = {
+        .start  = vcc_seq_start,
+        .next   = vcc_seq_next,
+        .stop   = vcc_seq_stop,
+        .show   = vcc_seq_show,
+};
+ 
+static int vcc_seq_open(struct inode *inode, struct file *file)
+{
+        return __vcc_seq_open(inode, file, 0, &vcc_seq_ops);
+}
+ 
+static struct file_operations vcc_seq_fops = {
+        .open           = vcc_seq_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = vcc_seq_release,
+};
+
+static int svc_seq_show(struct seq_file *seq, void *v)
+{
+        static char atm_svc_banner[] = 
+                "Itf VPI VCI           State      Remote\n";
+
+        if (v == (void *)1)
+                seq_puts(seq, atm_svc_banner);
+        else {
+                struct vcc_state *state = seq->private;
+                struct atm_vcc *vcc = atm_sk(state->sk);
+
+                svc_info(seq, vcc);
+        }
+        return 0;
+}
+
+static struct seq_operations svc_seq_ops = {
+        .start  = vcc_seq_start,
+        .next   = vcc_seq_next,
+        .stop   = vcc_seq_stop,
+        .show   = svc_seq_show,
+};
+
+static int svc_seq_open(struct inode *inode, struct file *file)
+{
+        return __vcc_seq_open(inode, file, PF_ATMSVC, &svc_seq_ops);
+}
+
+static struct file_operations svc_seq_fops = {
+        .open           = svc_seq_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = vcc_seq_release,
+};
+
+static ssize_t proc_dev_atm_read(struct file *file, char __user *buf,
+                                 size_t count, loff_t *pos)
+{
+        struct atm_dev *dev;
+        unsigned long page;
+        int length;
+
+        if (count == 0) return 0;
+        page = get_zeroed_page(GFP_KERNEL);
+        if (!page) return -ENOMEM;
+        dev = PDE(file->f_dentry->d_inode)->data;
+        if (!dev->ops->proc_read)
+                length = -EINVAL;
+        else {
+                length = dev->ops->proc_read(dev,pos,(char *) page);
+                if (length > count) length = -EINVAL;
+        }
+        if (length >= 0) {
+                if (copy_to_user(buf,(char *) page,length)) length = -EFAULT;
+                (*pos)++;
+        }
+        free_page(page);
+        return length;
+}
+
+
+struct proc_dir_entry *atm_proc_root;
+EXPORT_SYMBOL(atm_proc_root);
+
+
+int atm_proc_dev_register(struct atm_dev *dev)
+{
+        int digits,num;
+        int error;
+
+        /* No proc info */
+        if (!dev->ops->proc_read)
+                return 0;
+
+        error = -ENOMEM;
+        digits = 0;
+        for (num = dev->number; num; num /= 10) digits++;
+        if (!digits) digits++;
+
+        dev->proc_name = kmalloc(strlen(dev->type) + digits + 2, GFP_KERNEL);
+        if (!dev->proc_name)
+                goto err_out;
+        sprintf(dev->proc_name,"%s:%d",dev->type, dev->number);
+
+        dev->proc_entry = create_proc_entry(dev->proc_name, 0, atm_proc_root);
+        if (!dev->proc_entry)
+                goto err_free_name;
+        dev->proc_entry->data = dev;
+        dev->proc_entry->proc_fops = &proc_atm_dev_ops;
+        dev->proc_entry->owner = THIS_MODULE;
+        return 0;
+err_free_name:
+        kfree(dev->proc_name);
+err_out:
+        return error;
+}
+
+
+void atm_proc_dev_deregister(struct atm_dev *dev)
+{
+        if (!dev->ops->proc_read)
+                return;
+
+        remove_proc_entry(dev->proc_name, atm_proc_root);
+        kfree(dev->proc_name);
+}
+
+static struct atm_proc_entry {
+        char *name;
+        struct file_operations *proc_fops;
+        struct proc_dir_entry *dirent;
+} atm_proc_ents[] = {
+        { .name = "devices",    .proc_fops = &devices_seq_fops },
+        { .name = "pvc",        .proc_fops = &pvc_seq_fops },
+        { .name = "svc",        .proc_fops = &svc_seq_fops },
+        { .name = "vc",         .proc_fops = &vcc_seq_fops },
+        { .name = NULL,         .proc_fops = NULL }
+};
+
+static void atm_proc_dirs_remove(void)
+{
+        static struct atm_proc_entry *e;
+
+        for (e = atm_proc_ents; e->name; e++) {
+                if (e->dirent) 
+                        remove_proc_entry(e->name, atm_proc_root);
+        }
+        remove_proc_entry("net/atm", NULL);
+}
+
+int __init atm_proc_init(void)
+{
+        static struct atm_proc_entry *e;
+        int ret;
+
+        atm_proc_root = proc_mkdir("net/atm",NULL);
+        if (!atm_proc_root)
+                goto err_out;
+        for (e = atm_proc_ents; e->name; e++) {
+                struct proc_dir_entry *dirent;
+
+                dirent = create_proc_entry(e->name, S_IRUGO, atm_proc_root);
+                if (!dirent)
+                        goto err_out_remove;
+                dirent->proc_fops = e->proc_fops;
+                dirent->owner = THIS_MODULE;
+                e->dirent = dirent;
+        }
+        ret = 0;
+out:
+        return ret;
+
+err_out_remove:
+        atm_proc_dirs_remove();
+err_out:
+        ret = -ENOMEM;
+        goto out;
+}
+
+void __exit atm_proc_exit(void)
+{
+        atm_proc_dirs_remove();
+}