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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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![Alexey Dobriyan](/assets/img/avatar_default.png)
The most notable change is DEFINE_SHOW_ATTRIBUTE macro split in seq_file.h. Conversion rule is: llseek => proc_lseek unlocked_ioctl => proc_ioctl xxx => proc_xxx delete ".owner = THIS_MODULE" line [akpm@linux-foundation.org: fix drivers/isdn/capi/kcapi_proc.c] [sfr@canb.auug.org.au: fix kernel/sched/psi.c] Link: http://lkml.kernel.org/r/20200122180545.36222f50@canb.auug.org.au Link: http://lkml.kernel.org/r/20191225172546.GB13378@avx2 Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
400 lines
9.6 KiB
C
400 lines
9.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* net/atm/proc.c - ATM /proc interface
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*
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* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA
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*
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* seq_file api usage by romieu@fr.zoreil.com
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*
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* Evaluating the efficiency of the whole thing if left as an exercise to
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* the reader.
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*/
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#include <linux/module.h> /* for EXPORT_SYMBOL */
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#include <linux/string.h>
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#include <linux/types.h>
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#include <linux/mm.h>
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#include <linux/fs.h>
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#include <linux/stat.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/errno.h>
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#include <linux/atm.h>
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#include <linux/atmdev.h>
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#include <linux/netdevice.h>
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#include <linux/atmclip.h>
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#include <linux/init.h> /* for __init */
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#include <linux/slab.h>
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#include <net/net_namespace.h>
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#include <net/atmclip.h>
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#include <linux/uaccess.h>
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#include <linux/param.h> /* for HZ */
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#include <linux/atomic.h>
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#include "resources.h"
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#include "common.h" /* atm_proc_init prototype */
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#include "signaling.h" /* to get sigd - ugly too */
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static ssize_t proc_dev_atm_read(struct file *file, char __user *buf,
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size_t count, loff_t *pos);
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static const struct proc_ops atm_dev_proc_ops = {
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.proc_read = proc_dev_atm_read,
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.proc_lseek = noop_llseek,
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};
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static void add_stats(struct seq_file *seq, const char *aal,
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const struct k_atm_aal_stats *stats)
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{
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seq_printf(seq, "%s ( %d %d %d %d %d )", aal,
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atomic_read(&stats->tx), atomic_read(&stats->tx_err),
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atomic_read(&stats->rx), atomic_read(&stats->rx_err),
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atomic_read(&stats->rx_drop));
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}
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static void atm_dev_info(struct seq_file *seq, const struct atm_dev *dev)
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{
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int i;
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seq_printf(seq, "%3d %-8s", dev->number, dev->type);
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for (i = 0; i < ESI_LEN; i++)
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seq_printf(seq, "%02x", dev->esi[i]);
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seq_puts(seq, " ");
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add_stats(seq, "0", &dev->stats.aal0);
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seq_puts(seq, " ");
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add_stats(seq, "5", &dev->stats.aal5);
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seq_printf(seq, "\t[%d]", refcount_read(&dev->refcnt));
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seq_putc(seq, '\n');
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}
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struct vcc_state {
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int bucket;
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struct sock *sk;
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};
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static inline int compare_family(struct sock *sk, int family)
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{
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return !family || (sk->sk_family == family);
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}
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static int __vcc_walk(struct sock **sock, int family, int *bucket, loff_t l)
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{
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struct sock *sk = *sock;
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if (sk == SEQ_START_TOKEN) {
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for (*bucket = 0; *bucket < VCC_HTABLE_SIZE; ++*bucket) {
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struct hlist_head *head = &vcc_hash[*bucket];
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sk = hlist_empty(head) ? NULL : __sk_head(head);
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if (sk)
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break;
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}
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l--;
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}
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try_again:
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for (; sk; sk = sk_next(sk)) {
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l -= compare_family(sk, family);
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if (l < 0)
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goto out;
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}
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if (!sk && ++*bucket < VCC_HTABLE_SIZE) {
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sk = sk_head(&vcc_hash[*bucket]);
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goto try_again;
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}
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sk = SEQ_START_TOKEN;
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out:
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*sock = sk;
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return (l < 0);
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}
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static inline void *vcc_walk(struct seq_file *seq, loff_t l)
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{
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struct vcc_state *state = seq->private;
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int family = (uintptr_t)(PDE_DATA(file_inode(seq->file)));
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return __vcc_walk(&state->sk, family, &state->bucket, l) ?
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state : NULL;
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}
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static void *vcc_seq_start(struct seq_file *seq, loff_t *pos)
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__acquires(vcc_sklist_lock)
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{
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struct vcc_state *state = seq->private;
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loff_t left = *pos;
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read_lock(&vcc_sklist_lock);
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state->sk = SEQ_START_TOKEN;
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return left ? vcc_walk(seq, left) : SEQ_START_TOKEN;
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}
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static void vcc_seq_stop(struct seq_file *seq, void *v)
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__releases(vcc_sklist_lock)
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{
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read_unlock(&vcc_sklist_lock);
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}
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static void *vcc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
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{
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v = vcc_walk(seq, 1);
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(*pos)++;
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return v;
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}
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static void pvc_info(struct seq_file *seq, struct atm_vcc *vcc)
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{
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static const char *const class_name[] = {
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"off", "UBR", "CBR", "VBR", "ABR"};
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static const char *const aal_name[] = {
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"---", "1", "2", "3/4", /* 0- 3 */
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"???", "5", "???", "???", /* 4- 7 */
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"???", "???", "???", "???", /* 8-11 */
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"???", "0", "???", "???"}; /* 12-15 */
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seq_printf(seq, "%3d %3d %5d %-3s %7d %-5s %7d %-6s",
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vcc->dev->number, vcc->vpi, vcc->vci,
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vcc->qos.aal >= ARRAY_SIZE(aal_name) ? "err" :
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aal_name[vcc->qos.aal], vcc->qos.rxtp.min_pcr,
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class_name[vcc->qos.rxtp.traffic_class],
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vcc->qos.txtp.min_pcr,
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class_name[vcc->qos.txtp.traffic_class]);
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if (test_bit(ATM_VF_IS_CLIP, &vcc->flags)) {
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struct clip_vcc *clip_vcc = CLIP_VCC(vcc);
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struct net_device *dev;
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dev = clip_vcc->entry ? clip_vcc->entry->neigh->dev : NULL;
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seq_printf(seq, "CLIP, Itf:%s, Encap:",
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dev ? dev->name : "none?");
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seq_printf(seq, "%s", clip_vcc->encap ? "LLC/SNAP" : "None");
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}
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seq_putc(seq, '\n');
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}
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static const char *vcc_state(struct atm_vcc *vcc)
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{
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static const char *const map[] = { ATM_VS2TXT_MAP };
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return map[ATM_VF2VS(vcc->flags)];
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}
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static void vcc_info(struct seq_file *seq, struct atm_vcc *vcc)
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{
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struct sock *sk = sk_atm(vcc);
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seq_printf(seq, "%pK ", vcc);
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if (!vcc->dev)
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seq_printf(seq, "Unassigned ");
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else
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seq_printf(seq, "%3d %3d %5d ", vcc->dev->number, vcc->vpi,
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vcc->vci);
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switch (sk->sk_family) {
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case AF_ATMPVC:
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seq_printf(seq, "PVC");
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break;
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case AF_ATMSVC:
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seq_printf(seq, "SVC");
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break;
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default:
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seq_printf(seq, "%3d", sk->sk_family);
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}
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seq_printf(seq, " %04lx %5d %7d/%7d %7d/%7d [%d]\n",
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vcc->flags, sk->sk_err,
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sk_wmem_alloc_get(sk), sk->sk_sndbuf,
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sk_rmem_alloc_get(sk), sk->sk_rcvbuf,
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refcount_read(&sk->sk_refcnt));
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}
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static void svc_info(struct seq_file *seq, struct atm_vcc *vcc)
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{
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if (!vcc->dev)
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seq_printf(seq, sizeof(void *) == 4 ?
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"N/A@%pK%10s" : "N/A@%pK%2s", vcc, "");
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else
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seq_printf(seq, "%3d %3d %5d ",
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vcc->dev->number, vcc->vpi, vcc->vci);
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seq_printf(seq, "%-10s ", vcc_state(vcc));
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seq_printf(seq, "%s%s", vcc->remote.sas_addr.pub,
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*vcc->remote.sas_addr.pub && *vcc->remote.sas_addr.prv ? "+" : "");
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if (*vcc->remote.sas_addr.prv) {
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int i;
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for (i = 0; i < ATM_ESA_LEN; i++)
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seq_printf(seq, "%02x", vcc->remote.sas_addr.prv[i]);
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}
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seq_putc(seq, '\n');
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}
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static int atm_dev_seq_show(struct seq_file *seq, void *v)
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{
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static char atm_dev_banner[] =
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"Itf Type ESI/\"MAC\"addr "
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"AAL(TX,err,RX,err,drop) ... [refcnt]\n";
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if (v == &atm_devs)
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seq_puts(seq, atm_dev_banner);
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else {
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struct atm_dev *dev = list_entry(v, struct atm_dev, dev_list);
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atm_dev_info(seq, dev);
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}
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return 0;
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}
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static const struct seq_operations atm_dev_seq_ops = {
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.start = atm_dev_seq_start,
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.next = atm_dev_seq_next,
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.stop = atm_dev_seq_stop,
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.show = atm_dev_seq_show,
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};
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static int pvc_seq_show(struct seq_file *seq, void *v)
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{
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static char atm_pvc_banner[] =
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"Itf VPI VCI AAL RX(PCR,Class) TX(PCR,Class)\n";
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if (v == SEQ_START_TOKEN)
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seq_puts(seq, atm_pvc_banner);
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else {
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struct vcc_state *state = seq->private;
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struct atm_vcc *vcc = atm_sk(state->sk);
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pvc_info(seq, vcc);
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}
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return 0;
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}
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static const struct seq_operations pvc_seq_ops = {
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.start = vcc_seq_start,
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.next = vcc_seq_next,
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.stop = vcc_seq_stop,
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.show = pvc_seq_show,
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};
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static int vcc_seq_show(struct seq_file *seq, void *v)
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{
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if (v == SEQ_START_TOKEN) {
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seq_printf(seq, sizeof(void *) == 4 ? "%-8s%s" : "%-16s%s",
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"Address ", "Itf VPI VCI Fam Flags Reply "
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"Send buffer Recv buffer [refcnt]\n");
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} else {
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struct vcc_state *state = seq->private;
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struct atm_vcc *vcc = atm_sk(state->sk);
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vcc_info(seq, vcc);
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}
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return 0;
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}
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static const struct seq_operations vcc_seq_ops = {
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.start = vcc_seq_start,
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.next = vcc_seq_next,
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.stop = vcc_seq_stop,
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.show = vcc_seq_show,
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};
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static int svc_seq_show(struct seq_file *seq, void *v)
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{
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static const char atm_svc_banner[] =
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"Itf VPI VCI State Remote\n";
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if (v == SEQ_START_TOKEN)
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seq_puts(seq, atm_svc_banner);
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else {
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struct vcc_state *state = seq->private;
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struct atm_vcc *vcc = atm_sk(state->sk);
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svc_info(seq, vcc);
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}
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return 0;
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}
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static const struct seq_operations svc_seq_ops = {
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.start = vcc_seq_start,
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.next = vcc_seq_next,
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.stop = vcc_seq_stop,
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.show = svc_seq_show,
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};
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static ssize_t proc_dev_atm_read(struct file *file, char __user *buf,
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size_t count, loff_t *pos)
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{
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struct atm_dev *dev;
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unsigned long page;
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int length;
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if (count == 0)
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return 0;
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page = get_zeroed_page(GFP_KERNEL);
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if (!page)
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return -ENOMEM;
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dev = PDE_DATA(file_inode(file));
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if (!dev->ops->proc_read)
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length = -EINVAL;
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else {
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length = dev->ops->proc_read(dev, pos, (char *)page);
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if (length > count)
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length = -EINVAL;
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}
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if (length >= 0) {
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if (copy_to_user(buf, (char *)page, length))
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length = -EFAULT;
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(*pos)++;
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}
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free_page(page);
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return length;
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}
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struct proc_dir_entry *atm_proc_root;
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EXPORT_SYMBOL(atm_proc_root);
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int atm_proc_dev_register(struct atm_dev *dev)
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{
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int error;
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/* No proc info */
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if (!dev->ops->proc_read)
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return 0;
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error = -ENOMEM;
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dev->proc_name = kasprintf(GFP_KERNEL, "%s:%d", dev->type, dev->number);
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if (!dev->proc_name)
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goto err_out;
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dev->proc_entry = proc_create_data(dev->proc_name, 0, atm_proc_root,
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&atm_dev_proc_ops, dev);
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if (!dev->proc_entry)
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goto err_free_name;
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return 0;
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err_free_name:
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kfree(dev->proc_name);
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err_out:
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return error;
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}
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void atm_proc_dev_deregister(struct atm_dev *dev)
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{
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if (!dev->ops->proc_read)
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return;
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remove_proc_entry(dev->proc_name, atm_proc_root);
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kfree(dev->proc_name);
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}
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int __init atm_proc_init(void)
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{
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atm_proc_root = proc_net_mkdir(&init_net, "atm", init_net.proc_net);
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if (!atm_proc_root)
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return -ENOMEM;
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proc_create_seq("devices", 0444, atm_proc_root, &atm_dev_seq_ops);
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proc_create_seq_private("pvc", 0444, atm_proc_root, &pvc_seq_ops,
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sizeof(struct vcc_state), (void *)(uintptr_t)PF_ATMPVC);
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proc_create_seq_private("svc", 0444, atm_proc_root, &svc_seq_ops,
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sizeof(struct vcc_state), (void *)(uintptr_t)PF_ATMSVC);
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proc_create_seq_private("vc", 0444, atm_proc_root, &vcc_seq_ops,
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sizeof(struct vcc_state), NULL);
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return 0;
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}
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void atm_proc_exit(void)
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{
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remove_proc_subtree("atm", init_net.proc_net);
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}
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