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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333// SPDX-License-Identifier: GPL-2.0/* 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/init.h> /* for __init */#include <linux/slab.h>#include <net/net_namespace.h>#include <linux/uaccess.h>#include <linux/param.h> /* for HZ */#include <linux/atomic.h>#include "resources.h"#include "common.h" /* atm_proc_init prototype */
static ssize_t proc_dev_atm_read(struct file *file, char __user *buf, size_t count, loff_t *pos);
static const struct proc_ops atm_dev_proc_ops = { .proc_read = proc_dev_atm_read, .proc_lseek = 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]", refcount_read(&dev->refcnt)); seq_putc(seq, '\n');}
struct vcc_state { int bucket; struct sock *sk;};
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 seq_file *seq, loff_t l){ struct vcc_state *state = seq->private; int family = (uintptr_t)(pde_data(file_inode(seq->file)));
return __vcc_walk(&state->sk, family, &state->bucket, l) ? state : NULL;}
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(seq, 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){ v = vcc_walk(seq, 1); (*pos)++; 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]); seq_putc(seq, '\n');}
static void vcc_info(struct seq_file *seq, struct atm_vcc *vcc){ struct sock *sk = sk_atm(vcc);
seq_puts(seq, " 0 "); 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; 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, refcount_read(&sk->sk_refcnt));}
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 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 vcc_seq_show(struct seq_file *seq, void *v){ if (v == SEQ_START_TOKEN) { seq_puts(seq, "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 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_data(file_inode(file)); 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, &atm_dev_proc_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);}
int __init atm_proc_init(void){ atm_proc_root = proc_net_mkdir(&init_net, "atm", init_net.proc_net); if (!atm_proc_root) return -ENOMEM; proc_create_seq("devices", 0444, atm_proc_root, &atm_dev_seq_ops); proc_create_seq_private("pvc", 0444, atm_proc_root, &pvc_seq_ops, sizeof(struct vcc_state), (void *)(uintptr_t)PF_ATMPVC); proc_create_seq_private("vc", 0444, atm_proc_root, &vcc_seq_ops, sizeof(struct vcc_state), NULL); return 0;}
void atm_proc_exit(void){ remove_proc_subtree("atm", init_net.proc_net);}