cregit-Linux how code gets into the kernel

Release 4.11 net/atm/proc.c

Directory: net/atm
/* 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 <linux/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)); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)6692.96%375.00%
Chas Williams57.04%125.00%
Total71100.00%4100.00%


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'); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)9273.02%125.00%
Chas Williams3326.19%250.00%
David S. Miller10.79%125.00%
Total126100.00%4100.00%

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); }

Contributors

PersonTokensPropCommitsCommitProp
Chas Williams2177.78%266.67%
Linus Torvalds (pre-git)622.22%133.33%
Total27100.00%3100.00%


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); }

Contributors

PersonTokensPropCommitsCommitProp
Chas Williams14082.35%360.00%
Linus Torvalds (pre-git)2816.47%120.00%
Joe Perches21.18%120.00%
Total170100.00%5100.00%


static inline void *vcc_walk(struct vcc_state *state, loff_t l) { return __vcc_walk(&state->sk, state->family, &state->bucket, l) ? state : NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Chas Williams3690.00%375.00%
Linus Torvalds (pre-git)410.00%125.00%
Total40100.00%4100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Chas Williams3453.12%350.00%
Linus Torvalds (pre-git)1726.56%116.67%
Pavel Emelyanov1218.75%116.67%
Al Viro11.56%116.67%
Total64100.00%6100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Chas Williams5389.83%250.00%
Eric Dumazet46.78%125.00%
Joe Perches23.39%125.00%
Total59100.00%4100.00%


static void vcc_seq_stop(struct seq_file *seq, void *v) __releases (vcc_sklist_lock) { read_unlock(&vcc_sklist_lock); }

Contributors

PersonTokensPropCommitsCommitProp
Chas Williams2184.00%266.67%
Eric Dumazet416.00%133.33%
Total25100.00%3100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Chas Williams51100.00%1100.00%
Total51100.00%1100.00%


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'); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)21386.94%116.67%
Chas Williams2911.84%350.00%
Jan Engelhardt20.82%116.67%
Cheng Renquan10.41%116.67%
Total245100.00%6100.00%


static const char *vcc_state(struct atm_vcc *vcc) { static const char *const map[] = { ATM_VS2TXT_MAP }; return map[ATM_VF2VS(vcc->flags)]; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)3597.22%150.00%
Jan Engelhardt12.78%150.00%
Total36100.00%2100.00%


static void vcc_info(struct seq_file *seq, struct atm_vcc *vcc) { struct sock *sk = sk_atm(vcc); seq_printf(seq, "%pK ", 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)); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)9964.29%110.00%
Chas Williams3824.68%550.00%
Arnaldo Carvalho de Melo149.09%220.00%
Eric Dumazet21.30%110.00%
Dan Rosenberg10.65%110.00%
Total154100.00%10100.00%


static void svc_info(struct seq_file *seq, struct atm_vcc *vcc) { if (!vcc->dev) seq_printf(seq, sizeof(void *) == 4 ? "N/A@%pK%10s" : "N/A@%pK%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'); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)14485.21%360.00%
Chas Williams2313.61%120.00%
Dan Rosenberg21.18%120.00%
Total169100.00%5100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Chas Williams4264.62%350.00%
Linus Torvalds (pre-git)1726.15%116.67%
David S. Miller46.15%116.67%
Li Zefan23.08%116.67%
Total65100.00%6100.00%

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); }

Contributors

PersonTokensPropCommitsCommitProp
Chas Williams2184.00%375.00%
Linus Torvalds (pre-git)416.00%125.00%
Total25100.00%4100.00%

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; }

Contributors

PersonTokensPropCommitsCommitProp
Chas Williams4565.22%555.56%
Linus Torvalds (pre-git)2130.43%222.22%
David S. Miller22.90%111.11%
Joe Perches11.45%111.11%
Total69100.00%9100.00%

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); }

Contributors

PersonTokensPropCommitsCommitProp
Chas Williams2586.21%360.00%
Linus Torvalds (pre-git)413.79%240.00%
Total29100.00%5100.00%

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; }

Contributors

PersonTokensPropCommitsCommitProp
Chas Williams7291.14%466.67%
Linus Torvalds (pre-git)67.59%116.67%
Joe Perches11.27%116.67%
Total79100.00%6100.00%

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); }

Contributors

PersonTokensPropCommitsCommitProp
Chas Williams29100.00%2100.00%
Total29100.00%2100.00%

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; }

Contributors

PersonTokensPropCommitsCommitProp
Chas Williams5882.86%350.00%
Linus Torvalds (pre-git)1014.29%116.67%
Jan Engelhardt11.43%116.67%
Joe Perches11.43%116.67%
Total70100.00%6100.00%

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); }

Contributors

PersonTokensPropCommitsCommitProp
Chas Williams2689.66%266.67%
Linus Torvalds (pre-git)310.34%133.33%
Total29100.00%3100.00%

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_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; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)12377.36%218.18%
Chas Williams2616.35%327.27%
Al Viro74.40%436.36%
Linus Torvalds21.26%19.09%
Andrew Morton10.63%19.09%
Total159100.00%11100.00%

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; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)7671.03%228.57%
Chas Williams1715.89%228.57%
Eric Dumazet87.48%114.29%
Denis V. Lunev32.80%114.29%
Wang Chen32.80%114.29%
Total107100.00%7100.00%


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); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)2672.22%266.67%
Chas Williams1027.78%133.33%
Total36100.00%3100.00%

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); } remove_proc_entry("atm", init_net.proc_net); }

Contributors

PersonTokensPropCommitsCommitProp
Chas Williams4788.68%250.00%
Gao Feng59.43%125.00%
Denis V. Lunev11.89%125.00%
Total53100.00%4100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Chas Williams7868.42%228.57%
Linus Torvalds (pre-git)2320.18%228.57%
Wang Chen54.39%114.29%
Denis V. Lunev43.51%114.29%
Eric W. Biedermann43.51%114.29%
Total114100.00%7100.00%


void atm_proc_exit(void) { atm_proc_dirs_remove(); }

Contributors

PersonTokensPropCommitsCommitProp
Chas Williams10100.00%2100.00%
Total10100.00%2100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Chas Williams130950.93%2134.43%
Linus Torvalds (pre-git)112143.62%711.48%
Eric Dumazet180.70%34.92%
Pavel Emelyanov150.58%11.64%
Arnaldo Carvalho de Melo140.54%23.28%
Joe Perches100.39%23.28%
Al Viro90.35%58.20%
Wang Chen80.31%11.64%
Denis V. Lunev80.31%23.28%
Eric W. Biedermann70.27%11.64%
David S. Miller70.27%23.28%
Arjan van de Ven60.23%11.64%
Gao Feng50.19%11.64%
Arnd Bergmann50.19%11.64%
Hideaki Yoshifuji / 吉藤英明50.19%11.64%
Philippe De Muyter40.16%11.64%
Jan Engelhardt40.16%11.64%
Tejun Heo30.12%11.64%
Dan Rosenberg30.12%11.64%
Rusty Russell20.08%11.64%
Li Zefan20.08%11.64%
Linus Torvalds20.08%11.64%
Cheng Renquan10.04%11.64%
Andrew Morton10.04%11.64%
Arun Sharma10.04%11.64%
Total2570100.00%61100.00%
Directory: net/atm
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