aboutsummaryrefslogtreecommitdiff
path: root/drivers/s390/scsi/zfcp_cfdc.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/s390/scsi/zfcp_cfdc.c')
-rw-r--r--drivers/s390/scsi/zfcp_cfdc.c259
1 files changed, 0 insertions, 259 deletions
diff --git a/drivers/s390/scsi/zfcp_cfdc.c b/drivers/s390/scsi/zfcp_cfdc.c
deleted file mode 100644
index ec2abceca6d..00000000000
--- a/drivers/s390/scsi/zfcp_cfdc.c
+++ /dev/null
@@ -1,259 +0,0 @@
-/*
- * zfcp device driver
- *
- * Userspace interface for accessing the
- * Access Control Lists / Control File Data Channel
- *
- * Copyright IBM Corporation 2008
- */
-
-#include <linux/types.h>
-#include <linux/miscdevice.h>
-#include <asm/ccwdev.h>
-#include "zfcp_def.h"
-#include "zfcp_ext.h"
-#include "zfcp_fsf.h"
-
-#define ZFCP_CFDC_CMND_DOWNLOAD_NORMAL 0x00010001
-#define ZFCP_CFDC_CMND_DOWNLOAD_FORCE 0x00010101
-#define ZFCP_CFDC_CMND_FULL_ACCESS 0x00000201
-#define ZFCP_CFDC_CMND_RESTRICTED_ACCESS 0x00000401
-#define ZFCP_CFDC_CMND_UPLOAD 0x00010002
-
-#define ZFCP_CFDC_DOWNLOAD 0x00000001
-#define ZFCP_CFDC_UPLOAD 0x00000002
-#define ZFCP_CFDC_WITH_CONTROL_FILE 0x00010000
-
-#define ZFCP_CFDC_IOC_MAGIC 0xDD
-#define ZFCP_CFDC_IOC \
- _IOWR(ZFCP_CFDC_IOC_MAGIC, 0, struct zfcp_cfdc_data)
-
-/**
- * struct zfcp_cfdc_data - data for ioctl cfdc interface
- * @signature: request signature
- * @devno: FCP adapter device number
- * @command: command code
- * @fsf_status: returns status of FSF command to userspace
- * @fsf_status_qual: returned to userspace
- * @payloads: access conflicts list
- * @control_file: access control table
- */
-struct zfcp_cfdc_data {
- u32 signature;
- u32 devno;
- u32 command;
- u32 fsf_status;
- u8 fsf_status_qual[FSF_STATUS_QUALIFIER_SIZE];
- u8 payloads[256];
- u8 control_file[0];
-};
-
-static int zfcp_cfdc_copy_from_user(struct scatterlist *sg,
- void __user *user_buffer)
-{
- unsigned int length;
- unsigned int size = ZFCP_CFDC_MAX_SIZE;
-
- while (size) {
- length = min((unsigned int)size, sg->length);
- if (copy_from_user(sg_virt(sg++), user_buffer, length))
- return -EFAULT;
- user_buffer += length;
- size -= length;
- }
- return 0;
-}
-
-static int zfcp_cfdc_copy_to_user(void __user *user_buffer,
- struct scatterlist *sg)
-{
- unsigned int length;
- unsigned int size = ZFCP_CFDC_MAX_SIZE;
-
- while (size) {
- length = min((unsigned int) size, sg->length);
- if (copy_to_user(user_buffer, sg_virt(sg++), length))
- return -EFAULT;
- user_buffer += length;
- size -= length;
- }
- return 0;
-}
-
-static struct zfcp_adapter *zfcp_cfdc_get_adapter(u32 devno)
-{
- struct zfcp_adapter *adapter = NULL, *cur_adapter;
- struct ccw_dev_id dev_id;
-
- read_lock_irq(&zfcp_data.config_lock);
- list_for_each_entry(cur_adapter, &zfcp_data.adapter_list_head, list) {
- ccw_device_get_id(cur_adapter->ccw_device, &dev_id);
- if (dev_id.devno == devno) {
- adapter = cur_adapter;
- zfcp_adapter_get(adapter);
- break;
- }
- }
- read_unlock_irq(&zfcp_data.config_lock);
- return adapter;
-}
-
-static int zfcp_cfdc_set_fsf(struct zfcp_fsf_cfdc *fsf_cfdc, int command)
-{
- switch (command) {
- case ZFCP_CFDC_CMND_DOWNLOAD_NORMAL:
- fsf_cfdc->command = FSF_QTCB_DOWNLOAD_CONTROL_FILE;
- fsf_cfdc->option = FSF_CFDC_OPTION_NORMAL_MODE;
- break;
- case ZFCP_CFDC_CMND_DOWNLOAD_FORCE:
- fsf_cfdc->command = FSF_QTCB_DOWNLOAD_CONTROL_FILE;
- fsf_cfdc->option = FSF_CFDC_OPTION_FORCE;
- break;
- case ZFCP_CFDC_CMND_FULL_ACCESS:
- fsf_cfdc->command = FSF_QTCB_DOWNLOAD_CONTROL_FILE;
- fsf_cfdc->option = FSF_CFDC_OPTION_FULL_ACCESS;
- break;
- case ZFCP_CFDC_CMND_RESTRICTED_ACCESS:
- fsf_cfdc->command = FSF_QTCB_DOWNLOAD_CONTROL_FILE;
- fsf_cfdc->option = FSF_CFDC_OPTION_RESTRICTED_ACCESS;
- break;
- case ZFCP_CFDC_CMND_UPLOAD:
- fsf_cfdc->command = FSF_QTCB_UPLOAD_CONTROL_FILE;
- fsf_cfdc->option = 0;
- break;
- default:
- return -EINVAL;
- }
-
- return 0;
-}
-
-static int zfcp_cfdc_sg_setup(int command, struct scatterlist *sg,
- u8 __user *control_file)
-{
- int retval;
- retval = zfcp_sg_setup_table(sg, ZFCP_CFDC_PAGES);
- if (retval)
- return retval;
-
- sg[ZFCP_CFDC_PAGES - 1].length = ZFCP_CFDC_MAX_SIZE % PAGE_SIZE;
-
- if (command & ZFCP_CFDC_WITH_CONTROL_FILE &&
- command & ZFCP_CFDC_DOWNLOAD) {
- retval = zfcp_cfdc_copy_from_user(sg, control_file);
- if (retval) {
- zfcp_sg_free_table(sg, ZFCP_CFDC_PAGES);
- return -EFAULT;
- }
- }
-
- return 0;
-}
-
-static void zfcp_cfdc_req_to_sense(struct zfcp_cfdc_data *data,
- struct zfcp_fsf_req *req)
-{
- data->fsf_status = req->qtcb->header.fsf_status;
- memcpy(&data->fsf_status_qual, &req->qtcb->header.fsf_status_qual,
- sizeof(union fsf_status_qual));
- memcpy(&data->payloads, &req->qtcb->bottom.support.els,
- sizeof(req->qtcb->bottom.support.els));
-}
-
-static long zfcp_cfdc_dev_ioctl(struct file *file, unsigned int command,
- unsigned long buffer)
-{
- struct zfcp_cfdc_data *data;
- struct zfcp_cfdc_data __user *data_user;
- struct zfcp_adapter *adapter;
- struct zfcp_fsf_req *req;
- struct zfcp_fsf_cfdc *fsf_cfdc;
- int retval;
-
- if (command != ZFCP_CFDC_IOC)
- return -ENOTTY;
-
- data_user = (void __user *) buffer;
- if (!data_user)
- return -EINVAL;
-
- fsf_cfdc = kmalloc(sizeof(struct zfcp_fsf_cfdc), GFP_KERNEL);
- if (!fsf_cfdc)
- return -ENOMEM;
-
- data = kmalloc(sizeof(struct zfcp_cfdc_data), GFP_KERNEL);
- if (!data) {
- retval = -ENOMEM;
- goto no_mem_sense;
- }
-
- retval = copy_from_user(data, data_user, sizeof(*data));
- if (retval) {
- retval = -EFAULT;
- goto free_buffer;
- }
-
- if (data->signature != 0xCFDCACDF) {
- retval = -EINVAL;
- goto free_buffer;
- }
-
- retval = zfcp_cfdc_set_fsf(fsf_cfdc, data->command);
-
- adapter = zfcp_cfdc_get_adapter(data->devno);
- if (!adapter) {
- retval = -ENXIO;
- goto free_buffer;
- }
-
- retval = zfcp_cfdc_sg_setup(data->command, fsf_cfdc->sg,
- data_user->control_file);
- if (retval)
- goto adapter_put;
- req = zfcp_fsf_control_file(adapter, fsf_cfdc);
- if (IS_ERR(req)) {
- retval = PTR_ERR(req);
- goto free_sg;
- }
-
- if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
- retval = -ENXIO;
- goto free_fsf;
- }
-
- zfcp_cfdc_req_to_sense(data, req);
- retval = copy_to_user(data_user, data, sizeof(*data_user));
- if (retval) {
- retval = -EFAULT;
- goto free_fsf;
- }
-
- if (data->command & ZFCP_CFDC_UPLOAD)
- retval = zfcp_cfdc_copy_to_user(&data_user->control_file,
- fsf_cfdc->sg);
-
- free_fsf:
- zfcp_fsf_req_free(req);
- free_sg:
- zfcp_sg_free_table(fsf_cfdc->sg, ZFCP_CFDC_PAGES);
- adapter_put:
- zfcp_adapter_put(adapter);
- free_buffer:
- kfree(data);
- no_mem_sense:
- kfree(fsf_cfdc);
- return retval;
-}
-
-static const struct file_operations zfcp_cfdc_fops = {
- .unlocked_ioctl = zfcp_cfdc_dev_ioctl,
-#ifdef CONFIG_COMPAT
- .compat_ioctl = zfcp_cfdc_dev_ioctl
-#endif
-};
-
-struct miscdevice zfcp_cfdc_misc = {
- .minor = MISC_DYNAMIC_MINOR,
- .name = "zfcp_cfdc",
- .fops = &zfcp_cfdc_fops,
-};
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-09 00:51:55 +0000