scsi_proc.c revision 00977a59b951207d38380c75f03a36829950265c
11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * linux/drivers/scsi/scsi_proc.c 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The functions in this file provide an interface between 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the PROC file system and the SCSI device drivers 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * It is mainly used for debugging, statistics and to pass 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * information directly to the lowlevel driver. 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (c) 1995 Michael Neuffer neuffer@goofy.zdv.uni-mainz.de 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Version: 0.99.8 last change: 95/09/13 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * generic command parser provided by: 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Andreas Heilwagen <crashcar@informatik.uni-koblenz.de> 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * generic_proc_info() support of xxxx_info() by: 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Michael A. Griffith <grif@acm.org> 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/module.h> 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/init.h> 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/string.h> 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/mm.h> 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/slab.h> 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/proc_fs.h> 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/errno.h> 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/blkdev.h> 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/seq_file.h> 280b9506723826c68b50fa33e345700ddcac1bed36Arjan van de Ven#include <linux/mutex.h> 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/uaccess.h> 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <scsi/scsi.h> 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <scsi/scsi_device.h> 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <scsi/scsi_host.h> 34e02f3f59225d8c3b2a0ad0dc941a09865e27da61Christoph Hellwig#include <scsi/scsi_transport.h> 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "scsi_priv.h" 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "scsi_logging.h" 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 4K page size, but our output routines, use some slack for overruns */ 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define PROC_BLOCK_SIZE (3*1024) 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct proc_dir_entry *proc_scsi; 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Protect sht->present and sht->proc_dir */ 460b9506723826c68b50fa33e345700ddcac1bed36Arjan van de Venstatic DEFINE_MUTEX(global_host_template_mutex); 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int proc_scsi_read(char *buffer, char **start, off_t offset, 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int length, int *eof, void *data) 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct Scsi_Host *shost = data; 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int n; 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds n = shost->hostt->proc_info(shost, buffer, start, offset, length, 0); 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *eof = (n < length); 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return n; 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int proc_scsi_write_proc(struct file *file, const char __user *buf, 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long count, void *data) 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct Scsi_Host *shost = data; 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ssize_t ret = -ENOMEM; 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char *page; 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char *start; 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (count > PROC_BLOCK_SIZE) 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EOVERFLOW; 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds page = (char *)__get_free_page(GFP_KERNEL); 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (page) { 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = -EFAULT; 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (copy_from_user(page, buf, count)) 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = shost->hostt->proc_info(shost, page, &start, 0, count, 1); 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds free_page((unsigned long)page); 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ret; 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid scsi_proc_hostdir_add(struct scsi_host_template *sht) 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!sht->proc_info) 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 880b9506723826c68b50fa33e345700ddcac1bed36Arjan van de Ven mutex_lock(&global_host_template_mutex); 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!sht->present++) { 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sht->proc_dir = proc_mkdir(sht->proc_name, proc_scsi); 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!sht->proc_dir) 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "%s: proc_mkdir failed for %s\n", 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FUNCTION__, sht->proc_name); 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sht->proc_dir->owner = sht->module; 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 970b9506723826c68b50fa33e345700ddcac1bed36Arjan van de Ven mutex_unlock(&global_host_template_mutex); 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid scsi_proc_hostdir_rm(struct scsi_host_template *sht) 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!sht->proc_info) 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1050b9506723826c68b50fa33e345700ddcac1bed36Arjan van de Ven mutex_lock(&global_host_template_mutex); 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!--sht->present && sht->proc_dir) { 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds remove_proc_entry(sht->proc_name, proc_scsi); 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sht->proc_dir = NULL; 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1100b9506723826c68b50fa33e345700ddcac1bed36Arjan van de Ven mutex_unlock(&global_host_template_mutex); 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid scsi_proc_host_add(struct Scsi_Host *shost) 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct scsi_host_template *sht = shost->hostt; 1161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct proc_dir_entry *p; 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char name[10]; 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!sht->proc_dir) 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sprintf(name,"%d", shost->host_no); 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = create_proc_read_entry(name, S_IFREG | S_IRUGO | S_IWUSR, 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sht->proc_dir, proc_scsi_read, shost); 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!p) { 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "%s: Failed to register host %d in" 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "%s\n", __FUNCTION__, shost->host_no, 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sht->proc_name); 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p->write_proc = proc_scsi_write_proc; 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p->owner = sht->module; 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid scsi_proc_host_rm(struct Scsi_Host *shost) 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char name[10]; 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!shost->hostt->proc_dir) 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 1421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sprintf(name,"%d", shost->host_no); 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds remove_proc_entry(name, shost->hostt->proc_dir); 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int proc_print_scsidevice(struct device *dev, void *data) 1481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct scsi_device *sdev = to_scsi_device(dev); 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct seq_file *s = data; 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds seq_printf(s, 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "Host: scsi%d Channel: %02d Id: %02d Lun: %02d\n Vendor: ", 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sdev->host->host_no, sdev->channel, sdev->id, sdev->lun); 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < 8; i++) { 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (sdev->vendor[i] >= 0x20) 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds seq_printf(s, "%c", sdev->vendor[i]); 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds seq_printf(s, " "); 1611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds seq_printf(s, " Model: "); 1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < 16; i++) { 1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (sdev->model[i] >= 0x20) 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds seq_printf(s, "%c", sdev->model[i]); 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds seq_printf(s, " "); 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds seq_printf(s, " Rev: "); 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < 4; i++) { 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (sdev->rev[i] >= 0x20) 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds seq_printf(s, "%c", sdev->rev[i]); 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds seq_printf(s, " "); 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds seq_printf(s, "\n"); 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1814ff36718ede26ee2da73f2dae94d71e2b06845fcMatthew Wilcox seq_printf(s, " Type: %s ", scsi_device_type(sdev->type)); 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds seq_printf(s, " ANSI" 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds " SCSI revision: %02x", (sdev->scsi_level - 1) ? 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sdev->scsi_level - 1 : 1); 1851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (sdev->scsi_level == 2) 1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds seq_printf(s, " CCS\n"); 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds seq_printf(s, "\n"); 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int scsi_add_single_device(uint host, uint channel, uint id, uint lun) 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct Scsi_Host *shost; 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int error = -ENXIO; 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds shost = scsi_host_lookup(host); 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(shost)) 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return PTR_ERR(shost); 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 202e02f3f59225d8c3b2a0ad0dc941a09865e27da61Christoph Hellwig if (shost->transportt->user_scan) 203e02f3f59225d8c3b2a0ad0dc941a09865e27da61Christoph Hellwig error = shost->transportt->user_scan(shost, channel, id, lun); 204e02f3f59225d8c3b2a0ad0dc941a09865e27da61Christoph Hellwig else 205e02f3f59225d8c3b2a0ad0dc941a09865e27da61Christoph Hellwig error = scsi_scan_host_selected(shost, channel, id, lun, 1); 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds scsi_host_put(shost); 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return error; 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int scsi_remove_single_device(uint host, uint channel, uint id, uint lun) 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct scsi_device *sdev; 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct Scsi_Host *shost; 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int error = -ENXIO; 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds shost = scsi_host_lookup(host); 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(shost)) 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return PTR_ERR(shost); 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sdev = scsi_device_lookup(shost, channel, id, lun); 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (sdev) { 2211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds scsi_remove_device(sdev); 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds scsi_device_put(sdev); 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds error = 0; 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds scsi_host_put(shost); 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return error; 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic ssize_t proc_scsi_write(struct file *file, const char __user *buf, 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size_t length, loff_t *ppos) 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int host, channel, id, lun; 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char *buffer, *p; 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err; 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!buf || length > PAGE_SIZE) 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buffer = (char *)__get_free_page(GFP_KERNEL); 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!buffer) 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOMEM; 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = -EFAULT; 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (copy_from_user(buffer, buf, length)) 2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = -EINVAL; 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (length < PAGE_SIZE) 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buffer[length] = '\0'; 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (buffer[PAGE_SIZE-1]) 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Usage: echo "scsi add-single-device 0 1 2 3" >/proc/scsi/scsi 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * with "0 1 2 3" replaced by your "Host Channel Id Lun". 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!strncmp("scsi add-single-device", buffer, 22)) { 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = buffer + 23; 2601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds host = simple_strtoul(p, &p, 0); 2621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds channel = simple_strtoul(p + 1, &p, 0); 2631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds id = simple_strtoul(p + 1, &p, 0); 2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds lun = simple_strtoul(p + 1, &p, 0); 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = scsi_add_single_device(host, channel, id, lun); 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Usage: echo "scsi remove-single-device 0 1 2 3" >/proc/scsi/scsi 2701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * with "0 1 2 3" replaced by your "Host Channel Id Lun". 2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (!strncmp("scsi remove-single-device", buffer, 25)) { 2731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = buffer + 26; 2741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds host = simple_strtoul(p, &p, 0); 2761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds channel = simple_strtoul(p + 1, &p, 0); 2771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds id = simple_strtoul(p + 1, &p, 0); 2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds lun = simple_strtoul(p + 1, &p, 0); 2791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = scsi_remove_single_device(host, channel, id, lun); 2811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2832ca48a132167f9f12efba179382979aafde0ab36James Bottomley /* 2842ca48a132167f9f12efba179382979aafde0ab36James Bottomley * convert success returns so that we return the 2852ca48a132167f9f12efba179382979aafde0ab36James Bottomley * number of bytes consumed. 2862ca48a132167f9f12efba179382979aafde0ab36James Bottomley */ 2872ca48a132167f9f12efba179382979aafde0ab36James Bottomley if (!err) 2882ca48a132167f9f12efba179382979aafde0ab36James Bottomley err = length; 2892ca48a132167f9f12efba179382979aafde0ab36James Bottomley 2901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds out: 2911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds free_page((unsigned long)buffer); 2921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 2931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int proc_scsi_show(struct seq_file *s, void *p) 2961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds seq_printf(s, "Attached devices:\n"); 2981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus_for_each_dev(&scsi_bus_type, NULL, s, proc_print_scsidevice); 2991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 3001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int proc_scsi_open(struct inode *inode, struct file *file) 3031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 3051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * We don't really needs this for the write case but it doesn't 3061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * harm either. 3071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return single_open(file, proc_scsi_show, NULL); 3091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31100977a59b951207d38380c75f03a36829950265cArjan van de Venstatic const struct file_operations proc_scsi_operations = { 3121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .open = proc_scsi_open, 3131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .read = seq_read, 3141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .write = proc_scsi_write, 3151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .llseek = seq_lseek, 3161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .release = single_release, 3171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 3181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint __init scsi_init_procfs(void) 3201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct proc_dir_entry *pde; 3221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds proc_scsi = proc_mkdir("scsi", NULL); 3241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!proc_scsi) 3251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err1; 3261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pde = create_proc_entry("scsi/scsi", 0, NULL); 3281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!pde) 3291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err2; 3301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pde->proc_fops = &proc_scsi_operations; 3311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 3331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserr2: 3351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds remove_proc_entry("scsi", NULL); 3361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserr1: 3371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOMEM; 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid scsi_exit_procfs(void) 3411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds remove_proc_entry("scsi/scsi", NULL); 3431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds remove_proc_entry("scsi", NULL); 3441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 345