linux/net/atm/proc.c

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/* 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 cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 08:04:11 +00:00
#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,
};
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();
}