1 // SPDX-License-Identifier: GPL-2.0
10  * (c) 1995 Michael Neuffer neuffer@goofy.zdv.uni-mainz.de 
14  * Andreas Heilwagen <crashcar@informatik.uni-koblenz.de>
46 /* Protect sht->present and sht->proc_dir */
53 	ssize_t ret = -ENOMEM;  in proc_scsi_host_write()
57 		return -EOVERFLOW;  in proc_scsi_host_write()
59 	if (!shost->hostt->write_info)  in proc_scsi_host_write()
60 		return -EINVAL;  in proc_scsi_host_write()
64 		ret = -EFAULT;  in proc_scsi_host_write()
67 		ret = shost->hostt->write_info(shost, page, count);  in proc_scsi_host_write()
76 	struct Scsi_Host *shost = m->private;  in proc_scsi_show()
77 	return shost->hostt->show_info(m, shost);  in proc_scsi_show()
95  * scsi_proc_hostdir_add - Create directory in /proc for a scsi host
98  * Sets sht->proc_dir to the new directory.
103 	if (!sht->show_info)  in scsi_proc_hostdir_add()
107 	if (!sht->present++) {  in scsi_proc_hostdir_add()
108 		sht->proc_dir = proc_mkdir(sht->proc_name, proc_scsi);  in scsi_proc_hostdir_add()
109         	if (!sht->proc_dir)  in scsi_proc_hostdir_add()
111 			       __func__, sht->proc_name);  in scsi_proc_hostdir_add()
117  * scsi_proc_hostdir_rm - remove directory in /proc for a scsi host
122 	if (!sht->show_info)  in scsi_proc_hostdir_rm()
126 	if (!--sht->present && sht->proc_dir) {  in scsi_proc_hostdir_rm()
127 		remove_proc_entry(sht->proc_name, proc_scsi);  in scsi_proc_hostdir_rm()
128 		sht->proc_dir = NULL;  in scsi_proc_hostdir_rm()
135  * scsi_proc_host_add - Add entry for this host to appropriate /proc dir
140 	struct scsi_host_template *sht = shost->hostt;  in scsi_proc_host_add()
144 	if (!sht->proc_dir)  in scsi_proc_host_add()
147 	sprintf(name,"%d", shost->host_no);  in scsi_proc_host_add()
149 		sht->proc_dir, &proc_scsi_ops, shost);  in scsi_proc_host_add()
152 		       "%s\n", __func__, shost->host_no,  in scsi_proc_host_add()
153 		       sht->proc_name);  in scsi_proc_host_add()
157  * scsi_proc_host_rm - remove this host's entry from /proc
164 	if (!shost->hostt->proc_dir)  in scsi_proc_host_rm()
167 	sprintf(name,"%d", shost->host_no);  in scsi_proc_host_rm()
168 	remove_proc_entry(name, shost->hostt->proc_dir);  in scsi_proc_host_rm()
171  * proc_print_scsidevice - return data about this host
175  * Description: prints Host, Channel, Id, Lun, Vendor, Model, Rev, Type,
189 		"Host: scsi%d Channel: %02d Id: %02d Lun: %02llu\n  Vendor: ",  in proc_print_scsidevice()
190 		sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);  in proc_print_scsidevice()
192 		if (sdev->vendor[i] >= 0x20)  in proc_print_scsidevice()
193 			seq_putc(s, sdev->vendor[i]);  in proc_print_scsidevice()
200 		if (sdev->model[i] >= 0x20)  in proc_print_scsidevice()
201 			seq_putc(s, sdev->model[i]);  in proc_print_scsidevice()
208 		if (sdev->rev[i] >= 0x20)  in proc_print_scsidevice()
209 			seq_putc(s, sdev->rev[i]);  in proc_print_scsidevice()
216 	seq_printf(s, "  Type:   %s ", scsi_device_type(sdev->type));  in proc_print_scsidevice()
218 			sdev->scsi_level - (sdev->scsi_level > 1));  in proc_print_scsidevice()
219 	if (sdev->scsi_level == 2)  in proc_print_scsidevice()
229  * scsi_add_single_device - Respond to user request to probe for/add device
230  * @host: user-supplied decimal integer
231  * @channel: user-supplied decimal integer
232  * @id: user-supplied decimal integer
233  * @lun: user-supplied decimal integer
235  * Description: called by writing "scsi add-single-device" to /proc/scsi/scsi.
243 static int scsi_add_single_device(uint host, uint channel, uint id, uint lun)  in scsi_add_single_device()  argument
246 	int error = -ENXIO;  in scsi_add_single_device()
252 	if (shost->transportt->user_scan)  in scsi_add_single_device()
253 		error = shost->transportt->user_scan(shost, channel, id, lun);  in scsi_add_single_device()
255 		error = scsi_scan_host_selected(shost, channel, id, lun,  in scsi_add_single_device()
262  * scsi_remove_single_device - Respond to user request to remove a device
263  * @host: user-supplied decimal integer
264  * @channel: user-supplied decimal integer
265  * @id: user-supplied decimal integer
266  * @lun: user-supplied decimal integer
268  * Description: called by writing "scsi remove-single-device" to
271 static int scsi_remove_single_device(uint host, uint channel, uint id, uint lun)  in scsi_remove_single_device()  argument
275 	int error = -ENXIO;  in scsi_remove_single_device()
280 	sdev = scsi_device_lookup(shost, channel, id, lun);  in scsi_remove_single_device()
292  * proc_scsi_write - handle writes to /proc/scsi/scsi
299  * Host, Channel, ID, and Lun.  To use,
300  * "echo 'scsi add-single-device 0 1 2 3' > /proc/scsi/scsi" or
301  * "echo 'scsi remove-single-device 0 1 2 3' > /proc/scsi/scsi" with
302  * "0 1 2 3" replaced by the Host, Channel, Id, and Lun.
305  * SATA, Firewire, Fibre Channel, etc) dynamically assign these values to
313 	int host, channel, id, lun;  in proc_scsi_write()  local
318 		return -EINVAL;  in proc_scsi_write()
322 		return -ENOMEM;  in proc_scsi_write()
324 	err = -EFAULT;  in proc_scsi_write()
328 	err = -EINVAL;  in proc_scsi_write()
331 	else if (buffer[PAGE_SIZE-1])  in proc_scsi_write()
335 	 * Usage: echo "scsi add-single-device 0 1 2 3" >/proc/scsi/scsi  in proc_scsi_write()
336 	 * with  "0 1 2 3" replaced by your "Host Channel Id Lun".  in proc_scsi_write()
338 	if (!strncmp("scsi add-single-device", buffer, 22)) {  in proc_scsi_write()
342 		channel = simple_strtoul(p + 1, &p, 0);  in proc_scsi_write()
346 		err = scsi_add_single_device(host, channel, id, lun);  in proc_scsi_write()
349 	 * Usage: echo "scsi remove-single-device 0 1 2 3" >/proc/scsi/scsi  in proc_scsi_write()
350 	 * with  "0 1 2 3" replaced by your "Host Channel Id Lun".  in proc_scsi_write()
352 	} else if (!strncmp("scsi remove-single-device", buffer, 25)) {  in proc_scsi_write()
356 		channel = simple_strtoul(p + 1, &p, 0);  in proc_scsi_write()
360 		err = scsi_remove_single_device(host, channel, id, lun);  in proc_scsi_write()
389 		if (!n--)  in scsi_seq_start()
391 		sfile->private++;  in scsi_seq_start()
399 	sfile->private++;  in scsi_seq_next()
410 	if (!sfile->private)  in scsi_seq_show()
424  * proc_scsi_open - glue function
448  * scsi_init_procfs - create scsi and scsi/scsi in procfs
467 	return -ENOMEM;  in scsi_init_procfs()
471  * scsi_exit_procfs - Remove scsi/scsi and scsi from procfs