Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 1 | /* |
| 2 | * |
| 3 | * Copyright 1999 Digi International (www.digi.com) |
| 4 | * James Puzzo <jamesp at digi dot com> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2, or (at your option) |
| 9 | * any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the |
| 13 | * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR |
| 14 | * PURPOSE. See the GNU General Public License for more details. |
| 15 | * |
| 16 | */ |
| 17 | |
| 18 | /* |
| 19 | * |
| 20 | * Filename: |
| 21 | * |
| 22 | * dgrp_specproc.c |
| 23 | * |
| 24 | * Description: |
| 25 | * |
| 26 | * Handle the "config" proc entry for the linux realport device driver |
| 27 | * and provide slots for the "net" and "mon" devices |
| 28 | * |
| 29 | * Author: |
| 30 | * |
| 31 | * James A. Puzzo |
| 32 | * |
| 33 | */ |
| 34 | |
| 35 | #include <linux/module.h> |
| 36 | #include <linux/tty.h> |
| 37 | #include <linux/sched.h> |
| 38 | #include <linux/cred.h> |
| 39 | #include <linux/proc_fs.h> |
David Howells | 0d01ff2 | 2013-04-11 23:51:01 +0100 | [diff] [blame] | 40 | #include <linux/slab.h> |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 41 | #include <linux/ctype.h> |
| 42 | #include <linux/seq_file.h> |
Geert Uytterhoeven | ee98581 | 2012-09-27 20:38:26 +0200 | [diff] [blame] | 43 | #include <linux/uaccess.h> |
Stephen Rothwell | 4dac211 | 2012-09-25 00:29:20 +1000 | [diff] [blame] | 44 | #include <linux/vmalloc.h> |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 45 | |
| 46 | #include "dgrp_common.h" |
| 47 | |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 48 | static struct proc_dir_entry *dgrp_proc_dir_entry; |
| 49 | |
| 50 | static int dgrp_add_id(long id); |
| 51 | static int dgrp_remove_nd(struct nd_struct *nd); |
Al Viro | af064cd | 2013-03-30 01:03:53 -0400 | [diff] [blame] | 52 | static struct proc_dir_entry *add_proc_file(struct nd_struct *node, |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 53 | struct proc_dir_entry *root, |
Al Viro | af064cd | 2013-03-30 01:03:53 -0400 | [diff] [blame] | 54 | const struct file_operations *fops); |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 55 | |
| 56 | /* File operation declarations */ |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 57 | static int parse_write_config(char *); |
| 58 | |
Tommi Rantala | 900a72a | 2013-02-08 13:41:26 +0200 | [diff] [blame] | 59 | static ssize_t dgrp_config_proc_write(struct file *file, |
| 60 | const char __user *buffer, |
| 61 | size_t count, loff_t *pos); |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 62 | |
Tommi Rantala | 900a72a | 2013-02-08 13:41:26 +0200 | [diff] [blame] | 63 | static int dgrp_nodeinfo_proc_open(struct inode *inode, struct file *file); |
| 64 | static int dgrp_info_proc_open(struct inode *inode, struct file *file); |
| 65 | static int dgrp_config_proc_open(struct inode *inode, struct file *file); |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 66 | |
Al Viro | 75ef9de | 2013-04-04 19:09:41 -0400 | [diff] [blame] | 67 | static const struct file_operations config_proc_file_ops = { |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 68 | .owner = THIS_MODULE, |
Tommi Rantala | 900a72a | 2013-02-08 13:41:26 +0200 | [diff] [blame] | 69 | .open = dgrp_config_proc_open, |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 70 | .read = seq_read, |
| 71 | .llseek = seq_lseek, |
| 72 | .release = seq_release, |
Tommi Rantala | 900a72a | 2013-02-08 13:41:26 +0200 | [diff] [blame] | 73 | .write = dgrp_config_proc_write, |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 74 | }; |
| 75 | |
Al Viro | 75ef9de | 2013-04-04 19:09:41 -0400 | [diff] [blame] | 76 | static const struct file_operations info_proc_file_ops = { |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 77 | .owner = THIS_MODULE, |
Tommi Rantala | 900a72a | 2013-02-08 13:41:26 +0200 | [diff] [blame] | 78 | .open = dgrp_info_proc_open, |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 79 | .read = seq_read, |
| 80 | .llseek = seq_lseek, |
Tommi Rantala | 69a7c503 | 2013-02-08 13:41:25 +0200 | [diff] [blame] | 81 | .release = single_release, |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 82 | }; |
| 83 | |
Al Viro | 75ef9de | 2013-04-04 19:09:41 -0400 | [diff] [blame] | 84 | static const struct file_operations nodeinfo_proc_file_ops = { |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 85 | .owner = THIS_MODULE, |
Tommi Rantala | 900a72a | 2013-02-08 13:41:26 +0200 | [diff] [blame] | 86 | .open = dgrp_nodeinfo_proc_open, |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 87 | .read = seq_read, |
| 88 | .llseek = seq_lseek, |
| 89 | .release = seq_release, |
| 90 | }; |
| 91 | |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 92 | static struct proc_dir_entry *net_entry_pointer; |
| 93 | static struct proc_dir_entry *mon_entry_pointer; |
| 94 | static struct proc_dir_entry *dpa_entry_pointer; |
| 95 | static struct proc_dir_entry *ports_entry_pointer; |
| 96 | |
Al Viro | af064cd | 2013-03-30 01:03:53 -0400 | [diff] [blame] | 97 | static void remove_files(struct nd_struct *nd) |
| 98 | { |
| 99 | char buf[3]; |
| 100 | ID_TO_CHAR(nd->nd_ID, buf); |
| 101 | dgrp_remove_node_class_sysfs_files(nd); |
| 102 | if (nd->nd_net_de) |
| 103 | remove_proc_entry(buf, net_entry_pointer); |
| 104 | if (nd->nd_mon_de) |
| 105 | remove_proc_entry(buf, mon_entry_pointer); |
| 106 | if (nd->nd_dpa_de) |
| 107 | remove_proc_entry(buf, dpa_entry_pointer); |
| 108 | if (nd->nd_ports_de) |
| 109 | remove_proc_entry(buf, ports_entry_pointer); |
| 110 | } |
| 111 | |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 112 | void dgrp_unregister_proc(void) |
| 113 | { |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 114 | net_entry_pointer = NULL; |
| 115 | mon_entry_pointer = NULL; |
| 116 | dpa_entry_pointer = NULL; |
| 117 | ports_entry_pointer = NULL; |
| 118 | |
| 119 | if (dgrp_proc_dir_entry) { |
Al Viro | 08f3d07 | 2013-03-30 00:36:23 -0400 | [diff] [blame] | 120 | struct nd_struct *nd; |
Al Viro | af064cd | 2013-03-30 01:03:53 -0400 | [diff] [blame] | 121 | list_for_each_entry(nd, &nd_struct_list, list) |
| 122 | remove_files(nd); |
Al Viro | 08f3d07 | 2013-03-30 00:36:23 -0400 | [diff] [blame] | 123 | remove_proc_entry("dgrp/config", NULL); |
| 124 | remove_proc_entry("dgrp/info", NULL); |
| 125 | remove_proc_entry("dgrp/nodeinfo", NULL); |
| 126 | remove_proc_entry("dgrp/net", NULL); |
| 127 | remove_proc_entry("dgrp/mon", NULL); |
| 128 | remove_proc_entry("dgrp/dpa", NULL); |
| 129 | remove_proc_entry("dgrp/ports", NULL); |
| 130 | remove_proc_entry("dgrp", NULL); |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 131 | dgrp_proc_dir_entry = NULL; |
| 132 | } |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 133 | } |
| 134 | |
| 135 | void dgrp_register_proc(void) |
| 136 | { |
| 137 | /* |
| 138 | * Register /proc/dgrp |
| 139 | */ |
Al Viro | aa66d7b | 2013-03-29 20:39:17 -0400 | [diff] [blame] | 140 | dgrp_proc_dir_entry = proc_mkdir("dgrp", NULL); |
Al Viro | 08f3d07 | 2013-03-30 00:36:23 -0400 | [diff] [blame] | 141 | if (!dgrp_proc_dir_entry) |
Bill Pemberton | d7c4660 | 2012-10-09 14:18:19 -0400 | [diff] [blame] | 142 | return; |
Al Viro | 895b559 | 2013-03-30 01:07:56 -0400 | [diff] [blame] | 143 | proc_create("dgrp/config", 0644, NULL, &config_proc_file_ops); |
| 144 | proc_create("dgrp/info", 0644, NULL, &info_proc_file_ops); |
| 145 | proc_create("dgrp/nodeinfo", 0644, NULL, &nodeinfo_proc_file_ops); |
Al Viro | 08f3d07 | 2013-03-30 00:36:23 -0400 | [diff] [blame] | 146 | net_entry_pointer = proc_mkdir_mode("dgrp/net", 0500, NULL); |
| 147 | mon_entry_pointer = proc_mkdir_mode("dgrp/mon", 0500, NULL); |
| 148 | dpa_entry_pointer = proc_mkdir_mode("dgrp/dpa", 0500, NULL); |
| 149 | ports_entry_pointer = proc_mkdir_mode("dgrp/ports", 0500, NULL); |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 150 | } |
| 151 | |
Tommi Rantala | 900a72a | 2013-02-08 13:41:26 +0200 | [diff] [blame] | 152 | static void *dgrp_config_proc_start(struct seq_file *m, loff_t *pos) |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 153 | { |
| 154 | return seq_list_start_head(&nd_struct_list, *pos); |
| 155 | } |
| 156 | |
Tommi Rantala | 900a72a | 2013-02-08 13:41:26 +0200 | [diff] [blame] | 157 | static void *dgrp_config_proc_next(struct seq_file *p, void *v, loff_t *pos) |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 158 | { |
| 159 | return seq_list_next(v, &nd_struct_list, pos); |
| 160 | } |
| 161 | |
Tommi Rantala | 900a72a | 2013-02-08 13:41:26 +0200 | [diff] [blame] | 162 | static void dgrp_config_proc_stop(struct seq_file *m, void *v) |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 163 | { |
| 164 | } |
| 165 | |
Tommi Rantala | 900a72a | 2013-02-08 13:41:26 +0200 | [diff] [blame] | 166 | static int dgrp_config_proc_show(struct seq_file *m, void *v) |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 167 | { |
| 168 | struct nd_struct *nd; |
| 169 | char tmp_id[4]; |
| 170 | |
| 171 | if (v == &nd_struct_list) { |
| 172 | seq_puts(m, "#-----------------------------------------------------------------------------\n"); |
| 173 | seq_puts(m, "# Avail\n"); |
| 174 | seq_puts(m, "# ID Major State Ports\n"); |
| 175 | return 0; |
| 176 | } |
| 177 | |
| 178 | nd = list_entry(v, struct nd_struct, list); |
| 179 | |
| 180 | ID_TO_CHAR(nd->nd_ID, tmp_id); |
| 181 | |
| 182 | seq_printf(m, " %-2.2s %-5ld %-10.10s %-5d\n", |
| 183 | tmp_id, |
| 184 | nd->nd_major, |
| 185 | ND_STATE_STR(nd->nd_state), |
| 186 | nd->nd_chan_count); |
| 187 | |
| 188 | return 0; |
| 189 | } |
| 190 | |
| 191 | static const struct seq_operations proc_config_ops = { |
Tommi Rantala | 900a72a | 2013-02-08 13:41:26 +0200 | [diff] [blame] | 192 | .start = dgrp_config_proc_start, |
| 193 | .next = dgrp_config_proc_next, |
| 194 | .stop = dgrp_config_proc_stop, |
| 195 | .show = dgrp_config_proc_show, |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 196 | }; |
| 197 | |
Tommi Rantala | 900a72a | 2013-02-08 13:41:26 +0200 | [diff] [blame] | 198 | static int dgrp_config_proc_open(struct inode *inode, struct file *file) |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 199 | { |
| 200 | return seq_open(file, &proc_config_ops); |
| 201 | } |
| 202 | |
| 203 | |
| 204 | /* |
| 205 | * When writing configuration information, each "record" (i.e. each |
| 206 | * write) is treated as an independent request. See the "parse" |
| 207 | * description for more details. |
| 208 | */ |
Tommi Rantala | 900a72a | 2013-02-08 13:41:26 +0200 | [diff] [blame] | 209 | static ssize_t dgrp_config_proc_write(struct file *file, |
| 210 | const char __user *buffer, |
| 211 | size_t count, loff_t *pos) |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 212 | { |
| 213 | ssize_t retval; |
| 214 | char *inbuf, *sp; |
| 215 | char *line, *ldelim; |
| 216 | |
| 217 | if (count > 32768) |
| 218 | return -EINVAL; |
| 219 | |
| 220 | inbuf = sp = vzalloc(count + 1); |
| 221 | if (!inbuf) |
| 222 | return -ENOMEM; |
| 223 | |
| 224 | if (copy_from_user(inbuf, buffer, count)) { |
| 225 | retval = -EFAULT; |
| 226 | goto done; |
| 227 | } |
| 228 | |
| 229 | inbuf[count] = 0; |
| 230 | |
| 231 | ldelim = "\n"; |
| 232 | |
| 233 | line = strpbrk(sp, ldelim); |
| 234 | while (line) { |
| 235 | *line = 0; |
| 236 | retval = parse_write_config(sp); |
| 237 | if (retval) |
| 238 | goto done; |
| 239 | |
| 240 | sp = line + 1; |
| 241 | line = strpbrk(sp, ldelim); |
| 242 | } |
| 243 | |
| 244 | retval = count; |
| 245 | done: |
| 246 | vfree(inbuf); |
| 247 | return retval; |
| 248 | } |
| 249 | |
| 250 | /* |
| 251 | * ------------------------------------------------------------------------ |
| 252 | * |
| 253 | * The following are the functions to parse input |
| 254 | * |
| 255 | * ------------------------------------------------------------------------ |
| 256 | */ |
| 257 | static inline char *skip_past_ws(const char *str) |
| 258 | { |
| 259 | while ((*str) && !isspace(*str)) |
| 260 | ++str; |
| 261 | |
| 262 | return skip_spaces(str); |
| 263 | } |
| 264 | |
| 265 | static int parse_id(char **c, char *cID) |
| 266 | { |
| 267 | int tmp = **c; |
| 268 | |
| 269 | if (isalnum(tmp) || (tmp == '_')) |
| 270 | cID[0] = tmp; |
| 271 | else |
| 272 | return -EINVAL; |
| 273 | |
| 274 | (*c)++; tmp = **c; |
| 275 | |
| 276 | if (isalnum(tmp) || (tmp == '_')) { |
| 277 | cID[1] = tmp; |
| 278 | (*c)++; |
| 279 | } else |
| 280 | cID[1] = 0; |
| 281 | |
| 282 | return 0; |
| 283 | } |
| 284 | |
| 285 | static int parse_add_config(char *buf) |
| 286 | { |
| 287 | char *c = buf; |
| 288 | int retval; |
| 289 | char cID[2]; |
| 290 | long ID; |
| 291 | |
| 292 | c = skip_past_ws(c); |
| 293 | |
| 294 | retval = parse_id(&c, cID); |
| 295 | if (retval < 0) |
| 296 | return retval; |
| 297 | |
| 298 | ID = CHAR_TO_ID(cID); |
| 299 | |
| 300 | c = skip_past_ws(c); |
| 301 | |
| 302 | return dgrp_add_id(ID); |
| 303 | } |
| 304 | |
| 305 | static int parse_del_config(char *buf) |
| 306 | { |
| 307 | char *c = buf; |
| 308 | int retval; |
| 309 | struct nd_struct *nd; |
| 310 | char cID[2]; |
| 311 | long ID; |
| 312 | long major; |
| 313 | |
| 314 | c = skip_past_ws(c); |
| 315 | |
| 316 | retval = parse_id(&c, cID); |
| 317 | if (retval < 0) |
| 318 | return retval; |
| 319 | |
| 320 | ID = CHAR_TO_ID(cID); |
| 321 | |
| 322 | c = skip_past_ws(c); |
| 323 | |
| 324 | retval = kstrtol(c, 10, &major); |
| 325 | if (retval) |
| 326 | return retval; |
| 327 | |
| 328 | nd = nd_struct_get(major); |
| 329 | if (!nd) |
| 330 | return -EINVAL; |
| 331 | |
| 332 | if ((nd->nd_major != major) || (nd->nd_ID != ID)) |
| 333 | return -EINVAL; |
| 334 | |
| 335 | return dgrp_remove_nd(nd); |
| 336 | } |
| 337 | |
| 338 | static int parse_chg_config(char *buf) |
| 339 | { |
| 340 | return -EINVAL; |
| 341 | } |
| 342 | |
| 343 | /* |
| 344 | * The passed character buffer represents a single configuration request. |
| 345 | * If the first character is a "+", it is parsed as a request to add a |
| 346 | * PortServer |
| 347 | * If the first character is a "-", it is parsed as a request to delete a |
| 348 | * PortServer |
| 349 | * If the first character is a "*", it is parsed as a request to change a |
| 350 | * PortServer |
| 351 | * Any other character (including whitespace) causes the record to be |
| 352 | * ignored. |
| 353 | */ |
| 354 | static int parse_write_config(char *buf) |
| 355 | { |
| 356 | int retval; |
| 357 | |
| 358 | switch (buf[0]) { |
| 359 | case '+': |
| 360 | retval = parse_add_config(buf); |
| 361 | break; |
| 362 | case '-': |
| 363 | retval = parse_del_config(buf); |
| 364 | break; |
| 365 | case '*': |
| 366 | retval = parse_chg_config(buf); |
| 367 | break; |
| 368 | default: |
| 369 | retval = -EINVAL; |
| 370 | } |
| 371 | |
| 372 | return retval; |
| 373 | } |
| 374 | |
Tommi Rantala | 900a72a | 2013-02-08 13:41:26 +0200 | [diff] [blame] | 375 | static int dgrp_info_proc_show(struct seq_file *m, void *v) |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 376 | { |
| 377 | seq_printf(m, "version: %s\n", DIGI_VERSION); |
| 378 | seq_puts(m, "register_with_sysfs: 1\n"); |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 379 | seq_printf(m, "pollrate: 0x%08x\t(%d)\n", |
| 380 | dgrp_poll_tick, dgrp_poll_tick); |
| 381 | |
| 382 | return 0; |
| 383 | } |
| 384 | |
Tommi Rantala | 900a72a | 2013-02-08 13:41:26 +0200 | [diff] [blame] | 385 | static int dgrp_info_proc_open(struct inode *inode, struct file *file) |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 386 | { |
Tommi Rantala | 900a72a | 2013-02-08 13:41:26 +0200 | [diff] [blame] | 387 | return single_open(file, dgrp_info_proc_show, NULL); |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 388 | } |
| 389 | |
| 390 | |
Tommi Rantala | 900a72a | 2013-02-08 13:41:26 +0200 | [diff] [blame] | 391 | static void *dgrp_nodeinfo_start(struct seq_file *m, loff_t *pos) |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 392 | { |
| 393 | return seq_list_start_head(&nd_struct_list, *pos); |
| 394 | } |
| 395 | |
Tommi Rantala | 900a72a | 2013-02-08 13:41:26 +0200 | [diff] [blame] | 396 | static void *dgrp_nodeinfo_next(struct seq_file *p, void *v, loff_t *pos) |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 397 | { |
| 398 | return seq_list_next(v, &nd_struct_list, pos); |
| 399 | } |
| 400 | |
Tommi Rantala | 900a72a | 2013-02-08 13:41:26 +0200 | [diff] [blame] | 401 | static void dgrp_nodeinfo_stop(struct seq_file *m, void *v) |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 402 | { |
| 403 | } |
| 404 | |
Tommi Rantala | 900a72a | 2013-02-08 13:41:26 +0200 | [diff] [blame] | 405 | static int dgrp_nodeinfo_show(struct seq_file *m, void *v) |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 406 | { |
| 407 | struct nd_struct *nd; |
| 408 | char hwver[8]; |
| 409 | char swver[8]; |
| 410 | char tmp_id[4]; |
| 411 | |
| 412 | if (v == &nd_struct_list) { |
| 413 | seq_puts(m, "#-----------------------------------------------------------------------------\n"); |
| 414 | seq_puts(m, "# HW HW SW\n"); |
| 415 | seq_puts(m, "# ID State Version ID Version Description\n"); |
| 416 | return 0; |
| 417 | } |
| 418 | |
| 419 | nd = list_entry(v, struct nd_struct, list); |
| 420 | |
| 421 | ID_TO_CHAR(nd->nd_ID, tmp_id); |
| 422 | |
| 423 | if (nd->nd_state == NS_READY) { |
| 424 | sprintf(hwver, "%d.%d", (nd->nd_hw_ver >> 8) & 0xff, |
| 425 | nd->nd_hw_ver & 0xff); |
| 426 | sprintf(swver, "%d.%d", (nd->nd_sw_ver >> 8) & 0xff, |
| 427 | nd->nd_sw_ver & 0xff); |
| 428 | seq_printf(m, " %-2.2s %-10.10s %-7.7s %-3d %-7.7s %-35.35s\n", |
| 429 | tmp_id, |
| 430 | ND_STATE_STR(nd->nd_state), |
| 431 | hwver, |
| 432 | nd->nd_hw_id, |
| 433 | swver, |
| 434 | nd->nd_ps_desc); |
| 435 | |
| 436 | } else { |
| 437 | seq_printf(m, " %-2.2s %-10.10s\n", |
| 438 | tmp_id, |
| 439 | ND_STATE_STR(nd->nd_state)); |
| 440 | } |
| 441 | |
| 442 | return 0; |
| 443 | } |
| 444 | |
| 445 | |
| 446 | static const struct seq_operations nodeinfo_ops = { |
Tommi Rantala | 900a72a | 2013-02-08 13:41:26 +0200 | [diff] [blame] | 447 | .start = dgrp_nodeinfo_start, |
| 448 | .next = dgrp_nodeinfo_next, |
| 449 | .stop = dgrp_nodeinfo_stop, |
| 450 | .show = dgrp_nodeinfo_show, |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 451 | }; |
| 452 | |
Tommi Rantala | 900a72a | 2013-02-08 13:41:26 +0200 | [diff] [blame] | 453 | static int dgrp_nodeinfo_proc_open(struct inode *inode, struct file *file) |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 454 | { |
| 455 | return seq_open(file, &nodeinfo_ops); |
| 456 | } |
| 457 | |
| 458 | /** |
| 459 | * dgrp_add_id() -- creates new nd struct and adds it to list |
| 460 | * @id: id of device to add |
| 461 | */ |
| 462 | static int dgrp_add_id(long id) |
| 463 | { |
| 464 | struct nd_struct *nd; |
| 465 | int ret; |
| 466 | int i; |
| 467 | |
| 468 | nd = kzalloc(sizeof(struct nd_struct), GFP_KERNEL); |
| 469 | if (!nd) |
| 470 | return -ENOMEM; |
| 471 | |
| 472 | nd->nd_major = 0; |
| 473 | nd->nd_ID = id; |
| 474 | |
| 475 | spin_lock_init(&nd->nd_lock); |
| 476 | |
| 477 | init_waitqueue_head(&nd->nd_tx_waitq); |
| 478 | init_waitqueue_head(&nd->nd_mon_wqueue); |
| 479 | init_waitqueue_head(&nd->nd_dpa_wqueue); |
Al Viro | af064cd | 2013-03-30 01:03:53 -0400 | [diff] [blame] | 480 | sema_init(&nd->nd_mon_semaphore, 1); |
| 481 | sema_init(&nd->nd_net_semaphore, 1); |
| 482 | spin_lock_init(&nd->nd_dpa_lock); |
| 483 | nd->nd_state = NS_CLOSED; |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 484 | for (i = 0; i < SEQ_MAX; i++) |
| 485 | init_waitqueue_head(&nd->nd_seq_wque[i]); |
| 486 | |
| 487 | /* setup the structures to get the major number */ |
| 488 | ret = dgrp_tty_init(nd); |
| 489 | if (ret) |
| 490 | goto error_out; |
| 491 | |
| 492 | nd->nd_major = nd->nd_serial_ttdriver->major; |
| 493 | |
| 494 | ret = nd_struct_add(nd); |
| 495 | if (ret) |
| 496 | goto error_out; |
| 497 | |
Al Viro | af064cd | 2013-03-30 01:03:53 -0400 | [diff] [blame] | 498 | dgrp_create_node_class_sysfs_files(nd); |
| 499 | nd->nd_net_de = add_proc_file(nd, net_entry_pointer, &dgrp_net_ops); |
| 500 | nd->nd_mon_de = add_proc_file(nd, mon_entry_pointer, &dgrp_mon_ops); |
| 501 | nd->nd_dpa_de = add_proc_file(nd, dpa_entry_pointer, &dgrp_dpa_ops); |
| 502 | nd->nd_ports_de = add_proc_file(nd, ports_entry_pointer, |
| 503 | &dgrp_ports_ops); |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 504 | return 0; |
| 505 | |
Jiri Slaby | 191c5f1 | 2012-11-15 09:49:56 +0100 | [diff] [blame] | 506 | /* FIXME this guy should free the tty driver stored in nd and destroy |
| 507 | * all channel ports */ |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 508 | error_out: |
| 509 | kfree(nd); |
| 510 | return ret; |
| 511 | |
| 512 | } |
| 513 | |
| 514 | static int dgrp_remove_nd(struct nd_struct *nd) |
| 515 | { |
| 516 | int ret; |
| 517 | |
| 518 | /* Check to see if the selected structure is in use */ |
| 519 | if (nd->nd_tty_ref_cnt) |
| 520 | return -EBUSY; |
| 521 | |
Al Viro | af064cd | 2013-03-30 01:03:53 -0400 | [diff] [blame] | 522 | remove_files(nd); |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 523 | |
| 524 | dgrp_tty_uninit(nd); |
| 525 | |
| 526 | ret = nd_struct_del(nd); |
| 527 | if (ret) |
| 528 | return ret; |
| 529 | |
| 530 | kfree(nd); |
| 531 | return 0; |
| 532 | } |
| 533 | |
Al Viro | af064cd | 2013-03-30 01:03:53 -0400 | [diff] [blame] | 534 | static struct proc_dir_entry *add_proc_file(struct nd_struct *node, |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 535 | struct proc_dir_entry *root, |
Al Viro | af064cd | 2013-03-30 01:03:53 -0400 | [diff] [blame] | 536 | const struct file_operations *fops) |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 537 | { |
| 538 | char buf[3]; |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 539 | ID_TO_CHAR(node->nd_ID, buf); |
Al Viro | 895b559 | 2013-03-30 01:07:56 -0400 | [diff] [blame] | 540 | return proc_create_data(buf, 0600, root, fops, node); |
Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 541 | } |