Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* net/atm/proc.c - ATM /proc interface |
| 2 | * |
| 3 | * Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA |
| 4 | * |
| 5 | * seq_file api usage by romieu@fr.zoreil.com |
| 6 | * |
| 7 | * Evaluating the efficiency of the whole thing if left as an exercise to |
| 8 | * the reader. |
| 9 | */ |
| 10 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | #include <linux/module.h> /* for EXPORT_SYMBOL */ |
| 12 | #include <linux/string.h> |
| 13 | #include <linux/types.h> |
| 14 | #include <linux/mm.h> |
| 15 | #include <linux/fs.h> |
| 16 | #include <linux/stat.h> |
| 17 | #include <linux/proc_fs.h> |
| 18 | #include <linux/seq_file.h> |
| 19 | #include <linux/errno.h> |
| 20 | #include <linux/atm.h> |
| 21 | #include <linux/atmdev.h> |
| 22 | #include <linux/netdevice.h> |
| 23 | #include <linux/atmclip.h> |
| 24 | #include <linux/init.h> /* for __init */ |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 25 | #include <linux/slab.h> |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 26 | #include <net/net_namespace.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include <net/atmclip.h> |
Joe Perches | 07367ad | 2010-01-26 11:40:13 +0000 | [diff] [blame] | 28 | #include <linux/uaccess.h> |
| 29 | #include <linux/param.h> /* for HZ */ |
Arun Sharma | 60063497 | 2011-07-26 16:09:06 -0700 | [diff] [blame] | 30 | #include <linux/atomic.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include "resources.h" |
| 32 | #include "common.h" /* atm_proc_init prototype */ |
| 33 | #include "signaling.h" /* to get sigd - ugly too */ |
| 34 | |
Joe Perches | 07367ad | 2010-01-26 11:40:13 +0000 | [diff] [blame] | 35 | static ssize_t proc_dev_atm_read(struct file *file, char __user *buf, |
| 36 | size_t count, loff_t *pos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | |
Arjan van de Ven | 9a32144 | 2007-02-12 00:55:35 -0800 | [diff] [blame] | 38 | static const struct file_operations proc_atm_dev_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | .owner = THIS_MODULE, |
| 40 | .read = proc_dev_atm_read, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 41 | .llseek = noop_llseek, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | }; |
| 43 | |
| 44 | static void add_stats(struct seq_file *seq, const char *aal, |
| 45 | const struct k_atm_aal_stats *stats) |
| 46 | { |
| 47 | seq_printf(seq, "%s ( %d %d %d %d %d )", aal, |
Joe Perches | 07367ad | 2010-01-26 11:40:13 +0000 | [diff] [blame] | 48 | atomic_read(&stats->tx), atomic_read(&stats->tx_err), |
| 49 | atomic_read(&stats->rx), atomic_read(&stats->rx_err), |
| 50 | atomic_read(&stats->rx_drop)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | } |
| 52 | |
| 53 | static void atm_dev_info(struct seq_file *seq, const struct atm_dev *dev) |
| 54 | { |
| 55 | int i; |
| 56 | |
| 57 | seq_printf(seq, "%3d %-8s", dev->number, dev->type); |
| 58 | for (i = 0; i < ESI_LEN; i++) |
| 59 | seq_printf(seq, "%02x", dev->esi[i]); |
| 60 | seq_puts(seq, " "); |
| 61 | add_stats(seq, "0", &dev->stats.aal0); |
| 62 | seq_puts(seq, " "); |
| 63 | add_stats(seq, "5", &dev->stats.aal5); |
Reshetova, Elena | 458bc30 | 2017-07-04 15:53:01 +0300 | [diff] [blame] | 64 | seq_printf(seq, "\t[%d]", refcount_read(&dev->refcnt)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | seq_putc(seq, '\n'); |
| 66 | } |
| 67 | |
| 68 | struct vcc_state { |
| 69 | int bucket; |
| 70 | struct sock *sk; |
| 71 | int family; |
| 72 | }; |
| 73 | |
| 74 | static inline int compare_family(struct sock *sk, int family) |
| 75 | { |
| 76 | return !family || (sk->sk_family == family); |
| 77 | } |
| 78 | |
| 79 | static int __vcc_walk(struct sock **sock, int family, int *bucket, loff_t l) |
| 80 | { |
| 81 | struct sock *sk = *sock; |
| 82 | |
Joe Perches | 2e1e984 | 2008-04-10 03:33:03 -0700 | [diff] [blame] | 83 | if (sk == SEQ_START_TOKEN) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | for (*bucket = 0; *bucket < VCC_HTABLE_SIZE; ++*bucket) { |
| 85 | struct hlist_head *head = &vcc_hash[*bucket]; |
| 86 | |
| 87 | sk = hlist_empty(head) ? NULL : __sk_head(head); |
| 88 | if (sk) |
| 89 | break; |
| 90 | } |
| 91 | l--; |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 92 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | try_again: |
| 94 | for (; sk; sk = sk_next(sk)) { |
| 95 | l -= compare_family(sk, family); |
| 96 | if (l < 0) |
| 97 | goto out; |
| 98 | } |
| 99 | if (!sk && ++*bucket < VCC_HTABLE_SIZE) { |
| 100 | sk = sk_head(&vcc_hash[*bucket]); |
| 101 | goto try_again; |
| 102 | } |
Joe Perches | 2e1e984 | 2008-04-10 03:33:03 -0700 | [diff] [blame] | 103 | sk = SEQ_START_TOKEN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | out: |
| 105 | *sock = sk; |
| 106 | return (l < 0); |
| 107 | } |
| 108 | |
| 109 | static inline void *vcc_walk(struct vcc_state *state, loff_t l) |
| 110 | { |
| 111 | return __vcc_walk(&state->sk, state->family, &state->bucket, l) ? |
| 112 | state : NULL; |
| 113 | } |
| 114 | |
| 115 | static int __vcc_seq_open(struct inode *inode, struct file *file, |
Al Viro | ececfde | 2007-07-15 21:01:12 +0100 | [diff] [blame] | 116 | int family, const struct seq_operations *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | { |
| 118 | struct vcc_state *state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | |
Pavel Emelyanov | 9a8c09e | 2008-02-29 11:37:02 -0800 | [diff] [blame] | 120 | state = __seq_open_private(file, ops, sizeof(*state)); |
| 121 | if (state == NULL) |
| 122 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | |
| 124 | state->family = family; |
Pavel Emelyanov | 9a8c09e | 2008-02-29 11:37:02 -0800 | [diff] [blame] | 125 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | } |
| 127 | |
| 128 | static void *vcc_seq_start(struct seq_file *seq, loff_t *pos) |
Eric Dumazet | 5c17d5f | 2008-01-15 03:29:50 -0800 | [diff] [blame] | 129 | __acquires(vcc_sklist_lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | { |
| 131 | struct vcc_state *state = seq->private; |
| 132 | loff_t left = *pos; |
| 133 | |
| 134 | read_lock(&vcc_sklist_lock); |
Joe Perches | 2e1e984 | 2008-04-10 03:33:03 -0700 | [diff] [blame] | 135 | state->sk = SEQ_START_TOKEN; |
| 136 | return left ? vcc_walk(state, left) : SEQ_START_TOKEN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | } |
| 138 | |
| 139 | static void vcc_seq_stop(struct seq_file *seq, void *v) |
Eric Dumazet | 5c17d5f | 2008-01-15 03:29:50 -0800 | [diff] [blame] | 140 | __releases(vcc_sklist_lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | { |
| 142 | read_unlock(&vcc_sklist_lock); |
| 143 | } |
| 144 | |
| 145 | static void *vcc_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| 146 | { |
| 147 | struct vcc_state *state = seq->private; |
| 148 | |
| 149 | v = vcc_walk(state, 1); |
| 150 | *pos += !!PTR_ERR(v); |
| 151 | return v; |
| 152 | } |
| 153 | |
| 154 | static void pvc_info(struct seq_file *seq, struct atm_vcc *vcc) |
| 155 | { |
Joe Perches | 07367ad | 2010-01-26 11:40:13 +0000 | [diff] [blame] | 156 | static const char *const class_name[] = { |
| 157 | "off", "UBR", "CBR", "VBR", "ABR"}; |
Jan Engelhardt | 36cbd3d | 2009-08-05 10:42:58 -0700 | [diff] [blame] | 158 | static const char *const aal_name[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | "---", "1", "2", "3/4", /* 0- 3 */ |
| 160 | "???", "5", "???", "???", /* 4- 7 */ |
| 161 | "???", "???", "???", "???", /* 8-11 */ |
| 162 | "???", "0", "???", "???"}; /* 12-15 */ |
| 163 | |
| 164 | seq_printf(seq, "%3d %3d %5d %-3s %7d %-5s %7d %-6s", |
Joe Perches | 07367ad | 2010-01-26 11:40:13 +0000 | [diff] [blame] | 165 | vcc->dev->number, vcc->vpi, vcc->vci, |
| 166 | vcc->qos.aal >= ARRAY_SIZE(aal_name) ? "err" : |
| 167 | aal_name[vcc->qos.aal], vcc->qos.rxtp.min_pcr, |
| 168 | class_name[vcc->qos.rxtp.traffic_class], |
| 169 | vcc->qos.txtp.min_pcr, |
| 170 | class_name[vcc->qos.txtp.traffic_class]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | if (test_bit(ATM_VF_IS_CLIP, &vcc->flags)) { |
| 172 | struct clip_vcc *clip_vcc = CLIP_VCC(vcc); |
| 173 | struct net_device *dev; |
| 174 | |
| 175 | dev = clip_vcc->entry ? clip_vcc->entry->neigh->dev : NULL; |
| 176 | seq_printf(seq, "CLIP, Itf:%s, Encap:", |
| 177 | dev ? dev->name : "none?"); |
| 178 | seq_printf(seq, "%s", clip_vcc->encap ? "LLC/SNAP" : "None"); |
| 179 | } |
| 180 | seq_putc(seq, '\n'); |
| 181 | } |
| 182 | |
| 183 | static const char *vcc_state(struct atm_vcc *vcc) |
| 184 | { |
Jan Engelhardt | 36cbd3d | 2009-08-05 10:42:58 -0700 | [diff] [blame] | 185 | static const char *const map[] = { ATM_VS2TXT_MAP }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | |
| 187 | return map[ATM_VF2VS(vcc->flags)]; |
| 188 | } |
| 189 | |
| 190 | static void vcc_info(struct seq_file *seq, struct atm_vcc *vcc) |
| 191 | { |
| 192 | struct sock *sk = sk_atm(vcc); |
| 193 | |
Dan Rosenberg | 71338aa | 2011-05-23 12:17:35 +0000 | [diff] [blame] | 194 | seq_printf(seq, "%pK ", vcc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | if (!vcc->dev) |
| 196 | seq_printf(seq, "Unassigned "); |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 197 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | seq_printf(seq, "%3d %3d %5d ", vcc->dev->number, vcc->vpi, |
| 199 | vcc->vci); |
| 200 | switch (sk->sk_family) { |
Joe Perches | 07367ad | 2010-01-26 11:40:13 +0000 | [diff] [blame] | 201 | case AF_ATMPVC: |
| 202 | seq_printf(seq, "PVC"); |
| 203 | break; |
| 204 | case AF_ATMSVC: |
| 205 | seq_printf(seq, "SVC"); |
| 206 | break; |
| 207 | default: |
| 208 | seq_printf(seq, "%3d", sk->sk_family); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | } |
Joe Perches | 07367ad | 2010-01-26 11:40:13 +0000 | [diff] [blame] | 210 | seq_printf(seq, " %04lx %5d %7d/%7d %7d/%7d [%d]\n", |
| 211 | vcc->flags, sk->sk_err, |
| 212 | sk_wmem_alloc_get(sk), sk->sk_sndbuf, |
| 213 | sk_rmem_alloc_get(sk), sk->sk_rcvbuf, |
Reshetova, Elena | 41c6d65 | 2017-06-30 13:08:01 +0300 | [diff] [blame] | 214 | refcount_read(&sk->sk_refcnt)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | } |
| 216 | |
| 217 | static void svc_info(struct seq_file *seq, struct atm_vcc *vcc) |
| 218 | { |
| 219 | if (!vcc->dev) |
| 220 | seq_printf(seq, sizeof(void *) == 4 ? |
Dan Rosenberg | 71338aa | 2011-05-23 12:17:35 +0000 | [diff] [blame] | 221 | "N/A@%pK%10s" : "N/A@%pK%2s", vcc, ""); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | else |
| 223 | seq_printf(seq, "%3d %3d %5d ", |
| 224 | vcc->dev->number, vcc->vpi, vcc->vci); |
| 225 | seq_printf(seq, "%-10s ", vcc_state(vcc)); |
| 226 | seq_printf(seq, "%s%s", vcc->remote.sas_addr.pub, |
| 227 | *vcc->remote.sas_addr.pub && *vcc->remote.sas_addr.prv ? "+" : ""); |
| 228 | if (*vcc->remote.sas_addr.prv) { |
| 229 | int i; |
| 230 | |
| 231 | for (i = 0; i < ATM_ESA_LEN; i++) |
| 232 | seq_printf(seq, "%02x", vcc->remote.sas_addr.prv[i]); |
| 233 | } |
| 234 | seq_putc(seq, '\n'); |
| 235 | } |
| 236 | |
| 237 | static int atm_dev_seq_show(struct seq_file *seq, void *v) |
| 238 | { |
| 239 | static char atm_dev_banner[] = |
| 240 | "Itf Type ESI/\"MAC\"addr " |
| 241 | "AAL(TX,err,RX,err,drop) ... [refcnt]\n"; |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 242 | |
Li Zefan | 67de792 | 2010-02-08 23:21:51 +0000 | [diff] [blame] | 243 | if (v == &atm_devs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | seq_puts(seq, atm_dev_banner); |
| 245 | else { |
| 246 | struct atm_dev *dev = list_entry(v, struct atm_dev, dev_list); |
| 247 | |
| 248 | atm_dev_info(seq, dev); |
| 249 | } |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 250 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | } |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 252 | |
Philippe De Muyter | 56b3d97 | 2007-07-10 23:07:31 -0700 | [diff] [blame] | 253 | static const struct seq_operations atm_dev_seq_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | .start = atm_dev_seq_start, |
| 255 | .next = atm_dev_seq_next, |
| 256 | .stop = atm_dev_seq_stop, |
| 257 | .show = atm_dev_seq_show, |
| 258 | }; |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 259 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | static int atm_dev_seq_open(struct inode *inode, struct file *file) |
| 261 | { |
| 262 | return seq_open(file, &atm_dev_seq_ops); |
| 263 | } |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 264 | |
Arjan van de Ven | 9a32144 | 2007-02-12 00:55:35 -0800 | [diff] [blame] | 265 | static const struct file_operations devices_seq_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | .open = atm_dev_seq_open, |
| 267 | .read = seq_read, |
| 268 | .llseek = seq_lseek, |
| 269 | .release = seq_release, |
| 270 | }; |
| 271 | |
| 272 | static int pvc_seq_show(struct seq_file *seq, void *v) |
| 273 | { |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 274 | static char atm_pvc_banner[] = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | "Itf VPI VCI AAL RX(PCR,Class) TX(PCR,Class)\n"; |
| 276 | |
Joe Perches | 2e1e984 | 2008-04-10 03:33:03 -0700 | [diff] [blame] | 277 | if (v == SEQ_START_TOKEN) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | seq_puts(seq, atm_pvc_banner); |
| 279 | else { |
| 280 | struct vcc_state *state = seq->private; |
| 281 | struct atm_vcc *vcc = atm_sk(state->sk); |
| 282 | |
| 283 | pvc_info(seq, vcc); |
| 284 | } |
| 285 | return 0; |
| 286 | } |
| 287 | |
Philippe De Muyter | 56b3d97 | 2007-07-10 23:07:31 -0700 | [diff] [blame] | 288 | static const struct seq_operations pvc_seq_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | .start = vcc_seq_start, |
| 290 | .next = vcc_seq_next, |
| 291 | .stop = vcc_seq_stop, |
| 292 | .show = pvc_seq_show, |
| 293 | }; |
| 294 | |
| 295 | static int pvc_seq_open(struct inode *inode, struct file *file) |
| 296 | { |
| 297 | return __vcc_seq_open(inode, file, PF_ATMPVC, &pvc_seq_ops); |
| 298 | } |
| 299 | |
Arjan van de Ven | 9a32144 | 2007-02-12 00:55:35 -0800 | [diff] [blame] | 300 | static const struct file_operations pvc_seq_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | .open = pvc_seq_open, |
| 302 | .read = seq_read, |
| 303 | .llseek = seq_lseek, |
Pavel Emelyanov | 9a8c09e | 2008-02-29 11:37:02 -0800 | [diff] [blame] | 304 | .release = seq_release_private, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | }; |
| 306 | |
| 307 | static int vcc_seq_show(struct seq_file *seq, void *v) |
| 308 | { |
Joe Perches | 2e1e984 | 2008-04-10 03:33:03 -0700 | [diff] [blame] | 309 | if (v == SEQ_START_TOKEN) { |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 310 | seq_printf(seq, sizeof(void *) == 4 ? "%-8s%s" : "%-16s%s", |
| 311 | "Address ", "Itf VPI VCI Fam Flags Reply " |
| 312 | "Send buffer Recv buffer [refcnt]\n"); |
| 313 | } else { |
| 314 | struct vcc_state *state = seq->private; |
| 315 | struct atm_vcc *vcc = atm_sk(state->sk); |
| 316 | |
| 317 | vcc_info(seq, vcc); |
| 318 | } |
| 319 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | } |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 321 | |
Philippe De Muyter | 56b3d97 | 2007-07-10 23:07:31 -0700 | [diff] [blame] | 322 | static const struct seq_operations vcc_seq_ops = { |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 323 | .start = vcc_seq_start, |
| 324 | .next = vcc_seq_next, |
| 325 | .stop = vcc_seq_stop, |
| 326 | .show = vcc_seq_show, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | }; |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 328 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | static int vcc_seq_open(struct inode *inode, struct file *file) |
| 330 | { |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 331 | return __vcc_seq_open(inode, file, 0, &vcc_seq_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | } |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 333 | |
Arjan van de Ven | 9a32144 | 2007-02-12 00:55:35 -0800 | [diff] [blame] | 334 | static const struct file_operations vcc_seq_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | .open = vcc_seq_open, |
| 336 | .read = seq_read, |
| 337 | .llseek = seq_lseek, |
Pavel Emelyanov | 9a8c09e | 2008-02-29 11:37:02 -0800 | [diff] [blame] | 338 | .release = seq_release_private, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | }; |
| 340 | |
| 341 | static int svc_seq_show(struct seq_file *seq, void *v) |
| 342 | { |
Jan Engelhardt | 36cbd3d | 2009-08-05 10:42:58 -0700 | [diff] [blame] | 343 | static const char atm_svc_banner[] = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | "Itf VPI VCI State Remote\n"; |
| 345 | |
Joe Perches | 2e1e984 | 2008-04-10 03:33:03 -0700 | [diff] [blame] | 346 | if (v == SEQ_START_TOKEN) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | seq_puts(seq, atm_svc_banner); |
| 348 | else { |
| 349 | struct vcc_state *state = seq->private; |
| 350 | struct atm_vcc *vcc = atm_sk(state->sk); |
| 351 | |
| 352 | svc_info(seq, vcc); |
| 353 | } |
| 354 | return 0; |
| 355 | } |
| 356 | |
Philippe De Muyter | 56b3d97 | 2007-07-10 23:07:31 -0700 | [diff] [blame] | 357 | static const struct seq_operations svc_seq_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | .start = vcc_seq_start, |
| 359 | .next = vcc_seq_next, |
| 360 | .stop = vcc_seq_stop, |
| 361 | .show = svc_seq_show, |
| 362 | }; |
| 363 | |
| 364 | static int svc_seq_open(struct inode *inode, struct file *file) |
| 365 | { |
| 366 | return __vcc_seq_open(inode, file, PF_ATMSVC, &svc_seq_ops); |
| 367 | } |
| 368 | |
Arjan van de Ven | 9a32144 | 2007-02-12 00:55:35 -0800 | [diff] [blame] | 369 | static const struct file_operations svc_seq_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | .open = svc_seq_open, |
| 371 | .read = seq_read, |
| 372 | .llseek = seq_lseek, |
Pavel Emelyanov | 9a8c09e | 2008-02-29 11:37:02 -0800 | [diff] [blame] | 373 | .release = seq_release_private, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | }; |
| 375 | |
| 376 | static ssize_t proc_dev_atm_read(struct file *file, char __user *buf, |
| 377 | size_t count, loff_t *pos) |
| 378 | { |
| 379 | struct atm_dev *dev; |
| 380 | unsigned long page; |
| 381 | int length; |
| 382 | |
Joe Perches | 07367ad | 2010-01-26 11:40:13 +0000 | [diff] [blame] | 383 | if (count == 0) |
| 384 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | page = get_zeroed_page(GFP_KERNEL); |
Joe Perches | 07367ad | 2010-01-26 11:40:13 +0000 | [diff] [blame] | 386 | if (!page) |
| 387 | return -ENOMEM; |
Al Viro | d9dda78 | 2013-03-31 18:16:14 -0400 | [diff] [blame] | 388 | dev = PDE_DATA(file_inode(file)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | if (!dev->ops->proc_read) |
| 390 | length = -EINVAL; |
| 391 | else { |
Joe Perches | 07367ad | 2010-01-26 11:40:13 +0000 | [diff] [blame] | 392 | length = dev->ops->proc_read(dev, pos, (char *)page); |
| 393 | if (length > count) |
| 394 | length = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | } |
| 396 | if (length >= 0) { |
Joe Perches | 07367ad | 2010-01-26 11:40:13 +0000 | [diff] [blame] | 397 | if (copy_to_user(buf, (char *)page, length)) |
| 398 | length = -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | (*pos)++; |
| 400 | } |
| 401 | free_page(page); |
| 402 | return length; |
| 403 | } |
| 404 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | struct proc_dir_entry *atm_proc_root; |
| 406 | EXPORT_SYMBOL(atm_proc_root); |
| 407 | |
| 408 | |
| 409 | int atm_proc_dev_register(struct atm_dev *dev) |
| 410 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | int error; |
| 412 | |
| 413 | /* No proc info */ |
| 414 | if (!dev->ops->proc_read) |
| 415 | return 0; |
| 416 | |
| 417 | error = -ENOMEM; |
Eric Dumazet | 62c97ac | 2010-03-18 13:48:26 +0000 | [diff] [blame] | 418 | dev->proc_name = kasprintf(GFP_KERNEL, "%s:%d", dev->type, dev->number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | if (!dev->proc_name) |
| 420 | goto err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | |
Denis V. Lunev | 0c89652 | 2008-05-02 04:08:30 -0700 | [diff] [blame] | 422 | dev->proc_entry = proc_create_data(dev->proc_name, 0, atm_proc_root, |
| 423 | &proc_atm_dev_ops, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | if (!dev->proc_entry) |
| 425 | goto err_free_name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | return 0; |
Joe Perches | 07367ad | 2010-01-26 11:40:13 +0000 | [diff] [blame] | 427 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | err_free_name: |
| 429 | kfree(dev->proc_name); |
| 430 | err_out: |
| 431 | return error; |
| 432 | } |
| 433 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | void atm_proc_dev_deregister(struct atm_dev *dev) |
| 435 | { |
| 436 | if (!dev->ops->proc_read) |
| 437 | return; |
| 438 | |
| 439 | remove_proc_entry(dev->proc_name, atm_proc_root); |
| 440 | kfree(dev->proc_name); |
| 441 | } |
| 442 | |
| 443 | static struct atm_proc_entry { |
| 444 | char *name; |
Arjan van de Ven | 9a32144 | 2007-02-12 00:55:35 -0800 | [diff] [blame] | 445 | const struct file_operations *proc_fops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | struct proc_dir_entry *dirent; |
| 447 | } atm_proc_ents[] = { |
| 448 | { .name = "devices", .proc_fops = &devices_seq_fops }, |
| 449 | { .name = "pvc", .proc_fops = &pvc_seq_fops }, |
| 450 | { .name = "svc", .proc_fops = &svc_seq_fops }, |
| 451 | { .name = "vc", .proc_fops = &vcc_seq_fops }, |
| 452 | { .name = NULL, .proc_fops = NULL } |
| 453 | }; |
| 454 | |
| 455 | static void atm_proc_dirs_remove(void) |
| 456 | { |
| 457 | static struct atm_proc_entry *e; |
| 458 | |
| 459 | for (e = atm_proc_ents; e->name; e++) { |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 460 | if (e->dirent) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | remove_proc_entry(e->name, atm_proc_root); |
| 462 | } |
Gao feng | ece31ff | 2013-02-18 01:34:56 +0000 | [diff] [blame] | 463 | remove_proc_entry("atm", init_net.proc_net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | } |
| 465 | |
| 466 | int __init atm_proc_init(void) |
| 467 | { |
| 468 | static struct atm_proc_entry *e; |
| 469 | int ret; |
| 470 | |
Denis V. Lunev | e5d69b9 | 2008-01-10 03:51:41 -0800 | [diff] [blame] | 471 | atm_proc_root = proc_net_mkdir(&init_net, "atm", init_net.proc_net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | if (!atm_proc_root) |
| 473 | goto err_out; |
| 474 | for (e = atm_proc_ents; e->name; e++) { |
| 475 | struct proc_dir_entry *dirent; |
| 476 | |
Wang Chen | 16e297b | 2008-02-28 13:55:45 -0800 | [diff] [blame] | 477 | dirent = proc_create(e->name, S_IRUGO, |
| 478 | atm_proc_root, e->proc_fops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | if (!dirent) |
| 480 | goto err_out_remove; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | e->dirent = dirent; |
| 482 | } |
| 483 | ret = 0; |
| 484 | out: |
| 485 | return ret; |
| 486 | |
| 487 | err_out_remove: |
| 488 | atm_proc_dirs_remove(); |
| 489 | err_out: |
| 490 | ret = -ENOMEM; |
| 491 | goto out; |
| 492 | } |
| 493 | |
Kevin Hilman | b9c6e3e | 2006-08-15 02:02:33 -0700 | [diff] [blame] | 494 | void atm_proc_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | { |
| 496 | atm_proc_dirs_remove(); |
| 497 | } |