Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/drivers/scsi/scsi_proc.c |
| 3 | * |
| 4 | * The functions in this file provide an interface between |
| 5 | * the PROC file system and the SCSI device drivers |
| 6 | * It is mainly used for debugging, statistics and to pass |
| 7 | * information directly to the lowlevel driver. |
| 8 | * |
| 9 | * (c) 1995 Michael Neuffer neuffer@goofy.zdv.uni-mainz.de |
| 10 | * Version: 0.99.8 last change: 95/09/13 |
| 11 | * |
| 12 | * generic command parser provided by: |
| 13 | * Andreas Heilwagen <crashcar@informatik.uni-koblenz.de> |
| 14 | * |
| 15 | * generic_proc_info() support of xxxx_info() by: |
| 16 | * Michael A. Griffith <grif@acm.org> |
| 17 | */ |
| 18 | |
| 19 | #include <linux/module.h> |
| 20 | #include <linux/init.h> |
| 21 | #include <linux/string.h> |
| 22 | #include <linux/mm.h> |
| 23 | #include <linux/slab.h> |
| 24 | #include <linux/proc_fs.h> |
| 25 | #include <linux/errno.h> |
| 26 | #include <linux/blkdev.h> |
| 27 | #include <linux/seq_file.h> |
Arjan van de Ven | 0b95067 | 2006-01-11 13:16:10 +0100 | [diff] [blame] | 28 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include <asm/uaccess.h> |
| 30 | |
| 31 | #include <scsi/scsi.h> |
| 32 | #include <scsi/scsi_device.h> |
| 33 | #include <scsi/scsi_host.h> |
Christoph Hellwig | e02f3f5 | 2006-01-13 19:04:00 +0100 | [diff] [blame] | 34 | #include <scsi/scsi_transport.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
| 36 | #include "scsi_priv.h" |
| 37 | #include "scsi_logging.h" |
| 38 | |
| 39 | |
| 40 | /* 4K page size, but our output routines, use some slack for overruns */ |
| 41 | #define PROC_BLOCK_SIZE (3*1024) |
| 42 | |
| 43 | static struct proc_dir_entry *proc_scsi; |
| 44 | |
| 45 | /* Protect sht->present and sht->proc_dir */ |
Arjan van de Ven | 0b95067 | 2006-01-11 13:16:10 +0100 | [diff] [blame] | 46 | static DEFINE_MUTEX(global_host_template_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | |
Rob Landley | eb44820 | 2007-11-03 13:30:39 -0500 | [diff] [blame] | 48 | /** |
| 49 | * proc_scsi_read - handle read from /proc by calling host's proc_info() command |
| 50 | * @buffer: passed to proc_info |
| 51 | * @start: passed to proc_info |
| 52 | * @offset: passed to proc_info |
| 53 | * @length: passed to proc_info |
| 54 | * @eof: returns whether length read was less than requested |
| 55 | * @data: pointer to a &struct Scsi_Host |
| 56 | */ |
| 57 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | static int proc_scsi_read(char *buffer, char **start, off_t offset, |
| 59 | int length, int *eof, void *data) |
| 60 | { |
| 61 | struct Scsi_Host *shost = data; |
| 62 | int n; |
| 63 | |
| 64 | n = shost->hostt->proc_info(shost, buffer, start, offset, length, 0); |
| 65 | *eof = (n < length); |
| 66 | |
| 67 | return n; |
| 68 | } |
| 69 | |
Rob Landley | eb44820 | 2007-11-03 13:30:39 -0500 | [diff] [blame] | 70 | /** |
| 71 | * proc_scsi_write_proc - Handle write to /proc by calling host's proc_info() |
| 72 | * @file: not used |
| 73 | * @buf: source of data to write. |
| 74 | * @count: number of bytes (at most PROC_BLOCK_SIZE) to write. |
| 75 | * @data: pointer to &struct Scsi_Host |
| 76 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | static int proc_scsi_write_proc(struct file *file, const char __user *buf, |
| 78 | unsigned long count, void *data) |
| 79 | { |
| 80 | struct Scsi_Host *shost = data; |
| 81 | ssize_t ret = -ENOMEM; |
| 82 | char *page; |
| 83 | char *start; |
| 84 | |
| 85 | if (count > PROC_BLOCK_SIZE) |
| 86 | return -EOVERFLOW; |
| 87 | |
| 88 | page = (char *)__get_free_page(GFP_KERNEL); |
| 89 | if (page) { |
| 90 | ret = -EFAULT; |
| 91 | if (copy_from_user(page, buf, count)) |
| 92 | goto out; |
| 93 | ret = shost->hostt->proc_info(shost, page, &start, 0, count, 1); |
| 94 | } |
| 95 | out: |
| 96 | free_page((unsigned long)page); |
| 97 | return ret; |
| 98 | } |
| 99 | |
Rob Landley | eb44820 | 2007-11-03 13:30:39 -0500 | [diff] [blame] | 100 | /** |
| 101 | * scsi_proc_hostdir_add - Create directory in /proc for a scsi host |
| 102 | * @sht: owner of this directory |
| 103 | * |
| 104 | * Sets sht->proc_dir to the new directory. |
| 105 | */ |
| 106 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | void scsi_proc_hostdir_add(struct scsi_host_template *sht) |
| 108 | { |
| 109 | if (!sht->proc_info) |
| 110 | return; |
| 111 | |
Arjan van de Ven | 0b95067 | 2006-01-11 13:16:10 +0100 | [diff] [blame] | 112 | mutex_lock(&global_host_template_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | if (!sht->present++) { |
| 114 | sht->proc_dir = proc_mkdir(sht->proc_name, proc_scsi); |
| 115 | if (!sht->proc_dir) |
| 116 | printk(KERN_ERR "%s: proc_mkdir failed for %s\n", |
Harvey Harrison | cadbd4a | 2008-07-03 23:47:27 -0700 | [diff] [blame] | 117 | __func__, sht->proc_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | else |
| 119 | sht->proc_dir->owner = sht->module; |
| 120 | } |
Arjan van de Ven | 0b95067 | 2006-01-11 13:16:10 +0100 | [diff] [blame] | 121 | mutex_unlock(&global_host_template_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | } |
| 123 | |
Rob Landley | eb44820 | 2007-11-03 13:30:39 -0500 | [diff] [blame] | 124 | /** |
| 125 | * scsi_proc_hostdir_rm - remove directory in /proc for a scsi host |
| 126 | * @sht: owner of directory |
| 127 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | void scsi_proc_hostdir_rm(struct scsi_host_template *sht) |
| 129 | { |
| 130 | if (!sht->proc_info) |
| 131 | return; |
| 132 | |
Arjan van de Ven | 0b95067 | 2006-01-11 13:16:10 +0100 | [diff] [blame] | 133 | mutex_lock(&global_host_template_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | if (!--sht->present && sht->proc_dir) { |
| 135 | remove_proc_entry(sht->proc_name, proc_scsi); |
| 136 | sht->proc_dir = NULL; |
| 137 | } |
Arjan van de Ven | 0b95067 | 2006-01-11 13:16:10 +0100 | [diff] [blame] | 138 | mutex_unlock(&global_host_template_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | } |
| 140 | |
Rob Landley | eb44820 | 2007-11-03 13:30:39 -0500 | [diff] [blame] | 141 | |
| 142 | /** |
| 143 | * scsi_proc_host_add - Add entry for this host to appropriate /proc dir |
| 144 | * @shost: host to add |
| 145 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | void scsi_proc_host_add(struct Scsi_Host *shost) |
| 147 | { |
| 148 | struct scsi_host_template *sht = shost->hostt; |
| 149 | struct proc_dir_entry *p; |
| 150 | char name[10]; |
| 151 | |
| 152 | if (!sht->proc_dir) |
| 153 | return; |
| 154 | |
| 155 | sprintf(name,"%d", shost->host_no); |
| 156 | p = create_proc_read_entry(name, S_IFREG | S_IRUGO | S_IWUSR, |
| 157 | sht->proc_dir, proc_scsi_read, shost); |
| 158 | if (!p) { |
| 159 | printk(KERN_ERR "%s: Failed to register host %d in" |
Harvey Harrison | cadbd4a | 2008-07-03 23:47:27 -0700 | [diff] [blame] | 160 | "%s\n", __func__, shost->host_no, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | sht->proc_name); |
| 162 | return; |
| 163 | } |
| 164 | |
| 165 | p->write_proc = proc_scsi_write_proc; |
| 166 | p->owner = sht->module; |
| 167 | } |
| 168 | |
Rob Landley | eb44820 | 2007-11-03 13:30:39 -0500 | [diff] [blame] | 169 | /** |
| 170 | * scsi_proc_host_rm - remove this host's entry from /proc |
| 171 | * @shost: which host |
| 172 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | void scsi_proc_host_rm(struct Scsi_Host *shost) |
| 174 | { |
| 175 | char name[10]; |
| 176 | |
| 177 | if (!shost->hostt->proc_dir) |
| 178 | return; |
| 179 | |
| 180 | sprintf(name,"%d", shost->host_no); |
| 181 | remove_proc_entry(name, shost->hostt->proc_dir); |
| 182 | } |
Rob Landley | eb44820 | 2007-11-03 13:30:39 -0500 | [diff] [blame] | 183 | /** |
| 184 | * proc_print_scsidevice - return data about this host |
| 185 | * @dev: A scsi device |
| 186 | * @data: &struct seq_file to output to. |
| 187 | * |
| 188 | * Description: prints Host, Channel, Id, Lun, Vendor, Model, Rev, Type, |
| 189 | * and revision. |
| 190 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | static int proc_print_scsidevice(struct device *dev, void *data) |
| 192 | { |
Hannes Reinecke | b0ed433 | 2008-03-18 14:32:28 +0100 | [diff] [blame] | 193 | struct scsi_device *sdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | struct seq_file *s = data; |
| 195 | int i; |
| 196 | |
Hannes Reinecke | b0ed433 | 2008-03-18 14:32:28 +0100 | [diff] [blame] | 197 | if (!scsi_is_sdev_device(dev)) |
| 198 | goto out; |
| 199 | |
| 200 | sdev = to_scsi_device(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | seq_printf(s, |
| 202 | "Host: scsi%d Channel: %02d Id: %02d Lun: %02d\n Vendor: ", |
| 203 | sdev->host->host_no, sdev->channel, sdev->id, sdev->lun); |
| 204 | for (i = 0; i < 8; i++) { |
| 205 | if (sdev->vendor[i] >= 0x20) |
| 206 | seq_printf(s, "%c", sdev->vendor[i]); |
| 207 | else |
| 208 | seq_printf(s, " "); |
| 209 | } |
| 210 | |
| 211 | seq_printf(s, " Model: "); |
| 212 | for (i = 0; i < 16; i++) { |
| 213 | if (sdev->model[i] >= 0x20) |
| 214 | seq_printf(s, "%c", sdev->model[i]); |
| 215 | else |
| 216 | seq_printf(s, " "); |
| 217 | } |
| 218 | |
| 219 | seq_printf(s, " Rev: "); |
| 220 | for (i = 0; i < 4; i++) { |
| 221 | if (sdev->rev[i] >= 0x20) |
| 222 | seq_printf(s, "%c", sdev->rev[i]); |
| 223 | else |
| 224 | seq_printf(s, " "); |
| 225 | } |
| 226 | |
| 227 | seq_printf(s, "\n"); |
| 228 | |
Matthew Wilcox | 4ff3671 | 2006-07-04 12:15:20 -0600 | [diff] [blame] | 229 | seq_printf(s, " Type: %s ", scsi_device_type(sdev->type)); |
Alan Stern | 74feb53 | 2007-01-08 11:07:41 -0500 | [diff] [blame] | 230 | seq_printf(s, " ANSI SCSI revision: %02x", |
| 231 | sdev->scsi_level - (sdev->scsi_level > 1)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | if (sdev->scsi_level == 2) |
| 233 | seq_printf(s, " CCS\n"); |
| 234 | else |
| 235 | seq_printf(s, "\n"); |
| 236 | |
Hannes Reinecke | b0ed433 | 2008-03-18 14:32:28 +0100 | [diff] [blame] | 237 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | return 0; |
| 239 | } |
| 240 | |
Rob Landley | eb44820 | 2007-11-03 13:30:39 -0500 | [diff] [blame] | 241 | /** |
| 242 | * scsi_add_single_device - Respond to user request to probe for/add device |
| 243 | * @host: user-supplied decimal integer |
| 244 | * @channel: user-supplied decimal integer |
| 245 | * @id: user-supplied decimal integer |
| 246 | * @lun: user-supplied decimal integer |
| 247 | * |
| 248 | * Description: called by writing "scsi add-single-device" to /proc/scsi/scsi. |
| 249 | * |
| 250 | * does scsi_host_lookup() and either user_scan() if that transport |
| 251 | * type supports it, or else scsi_scan_host_selected() |
| 252 | * |
| 253 | * Note: this seems to be aimed exclusively at SCSI parallel busses. |
| 254 | */ |
| 255 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | static int scsi_add_single_device(uint host, uint channel, uint id, uint lun) |
| 257 | { |
| 258 | struct Scsi_Host *shost; |
| 259 | int error = -ENXIO; |
| 260 | |
| 261 | shost = scsi_host_lookup(host); |
| 262 | if (IS_ERR(shost)) |
| 263 | return PTR_ERR(shost); |
| 264 | |
Christoph Hellwig | e02f3f5 | 2006-01-13 19:04:00 +0100 | [diff] [blame] | 265 | if (shost->transportt->user_scan) |
| 266 | error = shost->transportt->user_scan(shost, channel, id, lun); |
| 267 | else |
| 268 | error = scsi_scan_host_selected(shost, channel, id, lun, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | scsi_host_put(shost); |
| 270 | return error; |
| 271 | } |
| 272 | |
Rob Landley | eb44820 | 2007-11-03 13:30:39 -0500 | [diff] [blame] | 273 | /** |
| 274 | * scsi_remove_single_device - Respond to user request to remove a device |
| 275 | * @host: user-supplied decimal integer |
| 276 | * @channel: user-supplied decimal integer |
| 277 | * @id: user-supplied decimal integer |
| 278 | * @lun: user-supplied decimal integer |
| 279 | * |
| 280 | * Description: called by writing "scsi remove-single-device" to |
| 281 | * /proc/scsi/scsi. Does a scsi_device_lookup() and scsi_remove_device() |
| 282 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | static int scsi_remove_single_device(uint host, uint channel, uint id, uint lun) |
| 284 | { |
| 285 | struct scsi_device *sdev; |
| 286 | struct Scsi_Host *shost; |
| 287 | int error = -ENXIO; |
| 288 | |
| 289 | shost = scsi_host_lookup(host); |
| 290 | if (IS_ERR(shost)) |
| 291 | return PTR_ERR(shost); |
| 292 | sdev = scsi_device_lookup(shost, channel, id, lun); |
| 293 | if (sdev) { |
| 294 | scsi_remove_device(sdev); |
| 295 | scsi_device_put(sdev); |
| 296 | error = 0; |
| 297 | } |
| 298 | |
| 299 | scsi_host_put(shost); |
| 300 | return error; |
| 301 | } |
| 302 | |
Rob Landley | eb44820 | 2007-11-03 13:30:39 -0500 | [diff] [blame] | 303 | /** |
| 304 | * proc_scsi_write - handle writes to /proc/scsi/scsi |
| 305 | * @file: not used |
| 306 | * @buf: buffer to write |
| 307 | * @length: length of buf, at most PAGE_SIZE |
| 308 | * @ppos: not used |
| 309 | * |
| 310 | * Description: this provides a legacy mechanism to add or remove devices by |
| 311 | * Host, Channel, ID, and Lun. To use, |
| 312 | * "echo 'scsi add-single-device 0 1 2 3' > /proc/scsi/scsi" or |
| 313 | * "echo 'scsi remove-single-device 0 1 2 3' > /proc/scsi/scsi" with |
| 314 | * "0 1 2 3" replaced by the Host, Channel, Id, and Lun. |
| 315 | * |
| 316 | * Note: this seems to be aimed at parallel SCSI. Most modern busses (USB, |
| 317 | * SATA, Firewire, Fibre Channel, etc) dynamically assign these values to |
| 318 | * provide a unique identifier and nothing more. |
| 319 | */ |
| 320 | |
| 321 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | static ssize_t proc_scsi_write(struct file *file, const char __user *buf, |
| 323 | size_t length, loff_t *ppos) |
| 324 | { |
| 325 | int host, channel, id, lun; |
| 326 | char *buffer, *p; |
| 327 | int err; |
| 328 | |
| 329 | if (!buf || length > PAGE_SIZE) |
| 330 | return -EINVAL; |
| 331 | |
| 332 | buffer = (char *)__get_free_page(GFP_KERNEL); |
| 333 | if (!buffer) |
| 334 | return -ENOMEM; |
| 335 | |
| 336 | err = -EFAULT; |
| 337 | if (copy_from_user(buffer, buf, length)) |
| 338 | goto out; |
| 339 | |
| 340 | err = -EINVAL; |
| 341 | if (length < PAGE_SIZE) |
| 342 | buffer[length] = '\0'; |
| 343 | else if (buffer[PAGE_SIZE-1]) |
| 344 | goto out; |
| 345 | |
| 346 | /* |
| 347 | * Usage: echo "scsi add-single-device 0 1 2 3" >/proc/scsi/scsi |
| 348 | * with "0 1 2 3" replaced by your "Host Channel Id Lun". |
| 349 | */ |
| 350 | if (!strncmp("scsi add-single-device", buffer, 22)) { |
| 351 | p = buffer + 23; |
| 352 | |
| 353 | host = simple_strtoul(p, &p, 0); |
| 354 | channel = simple_strtoul(p + 1, &p, 0); |
| 355 | id = simple_strtoul(p + 1, &p, 0); |
| 356 | lun = simple_strtoul(p + 1, &p, 0); |
| 357 | |
| 358 | err = scsi_add_single_device(host, channel, id, lun); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | |
| 360 | /* |
| 361 | * Usage: echo "scsi remove-single-device 0 1 2 3" >/proc/scsi/scsi |
| 362 | * with "0 1 2 3" replaced by your "Host Channel Id Lun". |
| 363 | */ |
| 364 | } else if (!strncmp("scsi remove-single-device", buffer, 25)) { |
| 365 | p = buffer + 26; |
| 366 | |
| 367 | host = simple_strtoul(p, &p, 0); |
| 368 | channel = simple_strtoul(p + 1, &p, 0); |
| 369 | id = simple_strtoul(p + 1, &p, 0); |
| 370 | lun = simple_strtoul(p + 1, &p, 0); |
| 371 | |
| 372 | err = scsi_remove_single_device(host, channel, id, lun); |
| 373 | } |
| 374 | |
James Bottomley | 2ca48a1 | 2006-04-27 14:07:49 -0500 | [diff] [blame] | 375 | /* |
| 376 | * convert success returns so that we return the |
| 377 | * number of bytes consumed. |
| 378 | */ |
| 379 | if (!err) |
| 380 | err = length; |
| 381 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | out: |
| 383 | free_page((unsigned long)buffer); |
| 384 | return err; |
| 385 | } |
| 386 | |
Rob Landley | eb44820 | 2007-11-03 13:30:39 -0500 | [diff] [blame] | 387 | /** |
| 388 | * proc_scsi_show - show contents of /proc/scsi/scsi (attached devices) |
| 389 | * @s: output goes here |
| 390 | * @p: not used |
| 391 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | static int proc_scsi_show(struct seq_file *s, void *p) |
| 393 | { |
| 394 | seq_printf(s, "Attached devices:\n"); |
| 395 | bus_for_each_dev(&scsi_bus_type, NULL, s, proc_print_scsidevice); |
| 396 | return 0; |
| 397 | } |
| 398 | |
Rob Landley | eb44820 | 2007-11-03 13:30:39 -0500 | [diff] [blame] | 399 | /** |
| 400 | * proc_scsi_open - glue function |
| 401 | * @inode: not used |
| 402 | * @file: passed to single_open() |
| 403 | * |
| 404 | * Associates proc_scsi_show with this file |
| 405 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | static int proc_scsi_open(struct inode *inode, struct file *file) |
| 407 | { |
| 408 | /* |
Rob Landley | eb44820 | 2007-11-03 13:30:39 -0500 | [diff] [blame] | 409 | * We don't really need this for the write case but it doesn't |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | * harm either. |
| 411 | */ |
| 412 | return single_open(file, proc_scsi_show, NULL); |
| 413 | } |
| 414 | |
Arjan van de Ven | 00977a5 | 2007-02-12 00:55:34 -0800 | [diff] [blame] | 415 | static const struct file_operations proc_scsi_operations = { |
Denis V. Lunev | a973909 | 2008-04-29 01:02:17 -0700 | [diff] [blame] | 416 | .owner = THIS_MODULE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | .open = proc_scsi_open, |
| 418 | .read = seq_read, |
| 419 | .write = proc_scsi_write, |
| 420 | .llseek = seq_lseek, |
| 421 | .release = single_release, |
| 422 | }; |
| 423 | |
Rob Landley | eb44820 | 2007-11-03 13:30:39 -0500 | [diff] [blame] | 424 | /** |
| 425 | * scsi_init_procfs - create scsi and scsi/scsi in procfs |
| 426 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | int __init scsi_init_procfs(void) |
| 428 | { |
| 429 | struct proc_dir_entry *pde; |
| 430 | |
| 431 | proc_scsi = proc_mkdir("scsi", NULL); |
| 432 | if (!proc_scsi) |
| 433 | goto err1; |
| 434 | |
Denis V. Lunev | a973909 | 2008-04-29 01:02:17 -0700 | [diff] [blame] | 435 | pde = proc_create("scsi/scsi", 0, NULL, &proc_scsi_operations); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | if (!pde) |
| 437 | goto err2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | |
| 439 | return 0; |
| 440 | |
| 441 | err2: |
| 442 | remove_proc_entry("scsi", NULL); |
| 443 | err1: |
| 444 | return -ENOMEM; |
| 445 | } |
| 446 | |
Rob Landley | eb44820 | 2007-11-03 13:30:39 -0500 | [diff] [blame] | 447 | /** |
| 448 | * scsi_exit_procfs - Remove scsi/scsi and scsi from procfs |
| 449 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | void scsi_exit_procfs(void) |
| 451 | { |
| 452 | remove_proc_entry("scsi/scsi", NULL); |
| 453 | remove_proc_entry("scsi", NULL); |
| 454 | } |