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path: root/drivers/s390/scsi/zfcp_cfdc.c
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Diffstat (limited to 'drivers/s390/scsi/zfcp_cfdc.c')
-rw-r--r--drivers/s390/scsi/zfcp_cfdc.c446
1 files changed, 0 insertions, 446 deletions
diff --git a/drivers/s390/scsi/zfcp_cfdc.c b/drivers/s390/scsi/zfcp_cfdc.c
deleted file mode 100644
index 49b82e46629e..000000000000
--- a/drivers/s390/scsi/zfcp_cfdc.c
+++ /dev/null
@@ -1,446 +0,0 @@
-/*
- * zfcp device driver
- *
- * Userspace interface for accessing the
- * Access Control Lists / Control File Data Channel;
- * handling of response code and states for ports and LUNs.
- *
- * Copyright IBM Corp. 2008, 2010
- */
-
-#define KMSG_COMPONENT "zfcp"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
-
-#include <linux/compat.h>
-#include <linux/slab.h>
-#include <linux/types.h>
-#include <linux/miscdevice.h>
-#include <asm/compat.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)
-{
- char busid[9];
- struct ccw_device *cdev;
- struct zfcp_adapter *adapter;
-
- snprintf(busid, sizeof(busid), "0.0.%04x", devno);
- cdev = get_ccwdev_by_busid(&zfcp_ccw_driver, busid);
- if (!cdev)
- return NULL;
-
- adapter = zfcp_ccw_adapter_by_cdev(cdev);
-
- put_device(&cdev->dev);
- 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 arg)
-{
- 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;
-
- if (is_compat_task())
- data_user = compat_ptr(arg);
- else
- data_user = (void __user *)arg;
-
- if (!data_user)
- return -EINVAL;
-
- fsf_cfdc = kmalloc(sizeof(struct zfcp_fsf_cfdc), GFP_KERNEL);
- if (!fsf_cfdc)
- return -ENOMEM;
-
- data = memdup_user(data_user, sizeof(*data_user));
- if (IS_ERR(data)) {
- retval = PTR_ERR(data);
- goto no_mem_sense;
- }
-
- 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_ccw_adapter_put(adapter);
- free_buffer:
- kfree(data);
- no_mem_sense:
- kfree(fsf_cfdc);
- return retval;
-}
-
-static const struct file_operations zfcp_cfdc_fops = {
- .open = nonseekable_open,
- .unlocked_ioctl = zfcp_cfdc_dev_ioctl,
-#ifdef CONFIG_COMPAT
- .compat_ioctl = zfcp_cfdc_dev_ioctl,
-#endif
- .llseek = no_llseek,
-};
-
-struct miscdevice zfcp_cfdc_misc = {
- .minor = MISC_DYNAMIC_MINOR,
- .name = "zfcp_cfdc",
- .fops = &zfcp_cfdc_fops,
-};
-
-/**
- * zfcp_cfdc_adapter_access_changed - Process change in adapter ACT
- * @adapter: Adapter where the Access Control Table (ACT) changed
- *
- * After a change in the adapter ACT, check if access to any
- * previously denied resources is now possible.
- */
-void zfcp_cfdc_adapter_access_changed(struct zfcp_adapter *adapter)
-{
- unsigned long flags;
- struct zfcp_port *port;
- struct scsi_device *sdev;
- struct zfcp_scsi_dev *zfcp_sdev;
- int status;
-
- if (adapter->connection_features & FSF_FEATURE_NPIV_MODE)
- return;
-
- read_lock_irqsave(&adapter->port_list_lock, flags);
- list_for_each_entry(port, &adapter->port_list, list) {
- status = atomic_read(&port->status);
- if ((status & ZFCP_STATUS_COMMON_ACCESS_DENIED) ||
- (status & ZFCP_STATUS_COMMON_ACCESS_BOXED))
- zfcp_erp_port_reopen(port,
- ZFCP_STATUS_COMMON_ERP_FAILED,
- "cfaac_1");
- }
- read_unlock_irqrestore(&adapter->port_list_lock, flags);
-
- shost_for_each_device(sdev, adapter->scsi_host) {
- zfcp_sdev = sdev_to_zfcp(sdev);
- status = atomic_read(&zfcp_sdev->status);
- if ((status & ZFCP_STATUS_COMMON_ACCESS_DENIED) ||
- (status & ZFCP_STATUS_COMMON_ACCESS_BOXED))
- zfcp_erp_lun_reopen(sdev,
- ZFCP_STATUS_COMMON_ERP_FAILED,
- "cfaac_2");
- }
-}
-
-static void zfcp_act_eval_err(struct zfcp_adapter *adapter, u32 table)
-{
- u16 subtable = table >> 16;
- u16 rule = table & 0xffff;
- const char *act_type[] = { "unknown", "OS", "WWPN", "DID", "LUN" };
-
- if (subtable && subtable < ARRAY_SIZE(act_type))
- dev_warn(&adapter->ccw_device->dev,
- "Access denied according to ACT rule type %s, "
- "rule %d\n", act_type[subtable], rule);
-}
-
-/**
- * zfcp_cfdc_port_denied - Process "access denied" for port
- * @port: The port where the access has been denied
- * @qual: The FSF status qualifier for the access denied FSF status
- */
-void zfcp_cfdc_port_denied(struct zfcp_port *port,
- union fsf_status_qual *qual)
-{
- dev_warn(&port->adapter->ccw_device->dev,
- "Access denied to port 0x%016Lx\n",
- (unsigned long long)port->wwpn);
-
- zfcp_act_eval_err(port->adapter, qual->halfword[0]);
- zfcp_act_eval_err(port->adapter, qual->halfword[1]);
- zfcp_erp_set_port_status(port,
- ZFCP_STATUS_COMMON_ERP_FAILED |
- ZFCP_STATUS_COMMON_ACCESS_DENIED);
-}
-
-/**
- * zfcp_cfdc_lun_denied - Process "access denied" for LUN
- * @sdev: The SCSI device / LUN where the access has been denied
- * @qual: The FSF status qualifier for the access denied FSF status
- */
-void zfcp_cfdc_lun_denied(struct scsi_device *sdev,
- union fsf_status_qual *qual)
-{
- struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
-
- dev_warn(&zfcp_sdev->port->adapter->ccw_device->dev,
- "Access denied to LUN 0x%016Lx on port 0x%016Lx\n",
- zfcp_scsi_dev_lun(sdev),
- (unsigned long long)zfcp_sdev->port->wwpn);
- zfcp_act_eval_err(zfcp_sdev->port->adapter, qual->halfword[0]);
- zfcp_act_eval_err(zfcp_sdev->port->adapter, qual->halfword[1]);
- zfcp_erp_set_lun_status(sdev,
- ZFCP_STATUS_COMMON_ERP_FAILED |
- ZFCP_STATUS_COMMON_ACCESS_DENIED);
-
- atomic_clear_mask(ZFCP_STATUS_LUN_SHARED, &zfcp_sdev->status);
- atomic_clear_mask(ZFCP_STATUS_LUN_READONLY, &zfcp_sdev->status);
-}
-
-/**
- * zfcp_cfdc_lun_shrng_vltn - Evaluate LUN sharing violation status
- * @sdev: The LUN / SCSI device where sharing violation occurred
- * @qual: The FSF status qualifier from the LUN sharing violation
- */
-void zfcp_cfdc_lun_shrng_vltn(struct scsi_device *sdev,
- union fsf_status_qual *qual)
-{
- struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
-
- if (qual->word[0])
- dev_warn(&zfcp_sdev->port->adapter->ccw_device->dev,
- "LUN 0x%Lx on port 0x%Lx is already in "
- "use by CSS%d, MIF Image ID %x\n",
- zfcp_scsi_dev_lun(sdev),
- (unsigned long long)zfcp_sdev->port->wwpn,
- qual->fsf_queue_designator.cssid,
- qual->fsf_queue_designator.hla);
- else
- zfcp_act_eval_err(zfcp_sdev->port->adapter, qual->word[2]);
-
- zfcp_erp_set_lun_status(sdev,
- ZFCP_STATUS_COMMON_ERP_FAILED |
- ZFCP_STATUS_COMMON_ACCESS_DENIED);
- atomic_clear_mask(ZFCP_STATUS_LUN_SHARED, &zfcp_sdev->status);
- atomic_clear_mask(ZFCP_STATUS_LUN_READONLY, &zfcp_sdev->status);
-}
-
-/**
- * zfcp_cfdc_open_lun_eval - Eval access ctrl. status for successful "open lun"
- * @sdev: The SCSI device / LUN where to evaluate the status
- * @bottom: The qtcb bottom with the status from the "open lun"
- *
- * Returns: 0 if LUN is usable, -EACCES if the access control table
- * reports an unsupported configuration.
- */
-int zfcp_cfdc_open_lun_eval(struct scsi_device *sdev,
- struct fsf_qtcb_bottom_support *bottom)
-{
- int shared, rw;
- struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
- struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
-
- if ((adapter->connection_features & FSF_FEATURE_NPIV_MODE) ||
- !(adapter->adapter_features & FSF_FEATURE_LUN_SHARING) ||
- zfcp_ccw_priv_sch(adapter))
- return 0;
-
- shared = !(bottom->lun_access_info & FSF_UNIT_ACCESS_EXCLUSIVE);
- rw = (bottom->lun_access_info & FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
-
- if (shared)
- atomic_set_mask(ZFCP_STATUS_LUN_SHARED, &zfcp_sdev->status);
-
- if (!rw) {
- atomic_set_mask(ZFCP_STATUS_LUN_READONLY, &zfcp_sdev->status);
- dev_info(&adapter->ccw_device->dev, "SCSI device at LUN "
- "0x%016Lx on port 0x%016Lx opened read-only\n",
- zfcp_scsi_dev_lun(sdev),
- (unsigned long long)zfcp_sdev->port->wwpn);
- }
-
- if (!shared && !rw) {
- dev_err(&adapter->ccw_device->dev, "Exclusive read-only access "
- "not supported (LUN 0x%016Lx, port 0x%016Lx)\n",
- zfcp_scsi_dev_lun(sdev),
- (unsigned long long)zfcp_sdev->port->wwpn);
- zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ERP_FAILED);
- zfcp_erp_lun_shutdown(sdev, 0, "fsouh_6");
- return -EACCES;
- }
-
- if (shared && rw) {
- dev_err(&adapter->ccw_device->dev,
- "Shared read-write access not supported "
- "(LUN 0x%016Lx, port 0x%016Lx)\n",
- zfcp_scsi_dev_lun(sdev),
- (unsigned long long)zfcp_sdev->port->wwpn);
- zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ERP_FAILED);
- zfcp_erp_lun_shutdown(sdev, 0, "fsosh_8");
- return -EACCES;
- }
-
- return 0;
-}