/* 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 <linux/slab.h> #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, .llseek = noop_llseek, }; 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(); }