| /* 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/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/net_namespace.h> |
| #include <net/atmclip.h> |
| #include <linux/uaccess.h> |
| #include <linux/param.h> /* for HZ */ |
| #include <asm/atomic.h> |
| #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 const 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 == SEQ_START_TOKEN) { |
| 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 = SEQ_START_TOKEN; |
| 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, const struct seq_operations *ops) |
| { |
| struct vcc_state *state; |
| |
| state = __seq_open_private(file, ops, sizeof(*state)); |
| if (state == NULL) |
| return -ENOMEM; |
| |
| state->family = family; |
| return 0; |
| } |
| |
| static void *vcc_seq_start(struct seq_file *seq, loff_t *pos) |
| __acquires(vcc_sklist_lock) |
| { |
| struct vcc_state *state = seq->private; |
| loff_t left = *pos; |
| |
| read_lock(&vcc_sklist_lock); |
| state->sk = SEQ_START_TOKEN; |
| return left ? vcc_walk(state, left) : SEQ_START_TOKEN; |
| } |
| |
| static void vcc_seq_stop(struct seq_file *seq, void *v) |
| __releases(vcc_sklist_lock) |
| { |
| 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 *const class_name[] = { |
| "off", "UBR", "CBR", "VBR", "ABR"}; |
| static const char *const 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 >= ARRAY_SIZE(aal_name) ? "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 *const 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, |
| sk_wmem_alloc_get(sk), sk->sk_sndbuf, |
| sk_rmem_alloc_get(sk), 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 == &atm_devs) |
| 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 const 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 const 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 == SEQ_START_TOKEN) |
| 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 const 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 const struct file_operations pvc_seq_fops = { |
| .open = pvc_seq_open, |
| .read = seq_read, |
| .llseek = seq_lseek, |
| .release = seq_release_private, |
| }; |
| |
| static int vcc_seq_show(struct seq_file *seq, void *v) |
| { |
| if (v == SEQ_START_TOKEN) { |
| 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 const 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 const struct file_operations vcc_seq_fops = { |
| .open = vcc_seq_open, |
| .read = seq_read, |
| .llseek = seq_lseek, |
| .release = seq_release_private, |
| }; |
| |
| static int svc_seq_show(struct seq_file *seq, void *v) |
| { |
| static const char atm_svc_banner[] = |
| "Itf VPI VCI State Remote\n"; |
| |
| if (v == SEQ_START_TOKEN) |
| 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 const 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 const struct file_operations svc_seq_fops = { |
| .open = svc_seq_open, |
| .read = seq_read, |
| .llseek = seq_lseek, |
| .release = seq_release_private, |
| }; |
| |
| 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_path.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 error; |
| |
| /* No proc info */ |
| if (!dev->ops->proc_read) |
| return 0; |
| |
| error = -ENOMEM; |
| dev->proc_name = kasprintf(GFP_KERNEL, "%s:%d", dev->type, dev->number); |
| if (!dev->proc_name) |
| goto err_out; |
| |
| dev->proc_entry = proc_create_data(dev->proc_name, 0, atm_proc_root, |
| &proc_atm_dev_ops, dev); |
| if (!dev->proc_entry) |
| goto err_free_name; |
| 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; |
| const 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); |
| } |
| proc_net_remove(&init_net, "atm"); |
| } |
| |
| int __init atm_proc_init(void) |
| { |
| static struct atm_proc_entry *e; |
| int ret; |
| |
| atm_proc_root = proc_net_mkdir(&init_net, "atm", init_net.proc_net); |
| if (!atm_proc_root) |
| goto err_out; |
| for (e = atm_proc_ents; e->name; e++) { |
| struct proc_dir_entry *dirent; |
| |
| dirent = proc_create(e->name, S_IRUGO, |
| atm_proc_root, e->proc_fops); |
| if (!dirent) |
| goto err_out_remove; |
| e->dirent = dirent; |
| } |
| ret = 0; |
| out: |
| return ret; |
| |
| err_out_remove: |
| atm_proc_dirs_remove(); |
| err_out: |
| ret = -ENOMEM; |
| goto out; |
| } |
| |
| void atm_proc_exit(void) |
| { |
| atm_proc_dirs_remove(); |
| } |