[SCSI] zfcp: remove access control tables interface (663e0890) · Commits · e / devices / android_kernel_teracube_mt6765

drivers/s390/scsi/Makefile

+1 −1

Original line number	Diff line number	Diff line
		@@ -2,7 +2,7 @@
		# Makefile for the S/390 specific device drivers
		#

		zfcp-objs := zfcp_aux.o zfcp_ccw.o zfcp_cfdc.o zfcp_dbf.o zfcp_erp.o \
		zfcp-objs := zfcp_aux.o zfcp_ccw.o zfcp_dbf.o zfcp_erp.o \
		zfcp_fc.o zfcp_fsf.o zfcp_qdio.o zfcp_scsi.o zfcp_sysfs.o \
		zfcp_unit.o

drivers/s390/scsi/zfcp_aux.c

+0 −10

Original line number	Diff line number	Diff line
		@@ -140,13 +140,6 @@ static int __init zfcp_module_init(void)
		scsi_transport_reserve_device(zfcp_scsi_transport_template,
		sizeof(struct zfcp_scsi_dev));


		retval = misc_register(&zfcp_cfdc_misc);
		if (retval) {
		pr_err("Registering the misc device zfcp_cfdc failed\n");
		goto out_misc;
		}

		retval = ccw_driver_register(&zfcp_ccw_driver);
		if (retval) {
		pr_err("The zfcp device driver could not register with "
		@@ -159,8 +152,6 @@ static int __init zfcp_module_init(void)
		return 0;

		out_ccw_register:
		misc_deregister(&zfcp_cfdc_misc);
		out_misc:
		fc_release_transport(zfcp_scsi_transport_template);
		out_transport:
		kmem_cache_destroy(zfcp_fc_req_cache);
		@@ -175,7 +166,6 @@ module_init(zfcp_module_init);
		static void __exit zfcp_module_exit(void)
		{
		ccw_driver_unregister(&zfcp_ccw_driver);
		misc_deregister(&zfcp_cfdc_misc);
		fc_release_transport(zfcp_scsi_transport_template);
		kmem_cache_destroy(zfcp_fc_req_cache);
		kmem_cache_destroy(zfcp_fsf_qtcb_cache);

drivers/s390/scsi/zfcp_ccw.c

+0 −9

Original line number	Diff line number	Diff line
		@@ -71,15 +71,6 @@ static struct ccw_device_id zfcp_ccw_device_id[] = {
		};
		MODULE_DEVICE_TABLE(ccw, zfcp_ccw_device_id);

		/**
		* zfcp_ccw_priv_sch - check if subchannel is privileged
		* @adapter: Adapter/Subchannel to check
		*/
		int zfcp_ccw_priv_sch(struct zfcp_adapter *adapter)
		{
		return adapter->ccw_device->id.dev_model == ZFCP_MODEL_PRIV;
		}

		/**
		* zfcp_ccw_probe - probe function of zfcp driver
		* @cdev: pointer to belonging ccw device

drivers/s390/scsi/zfcp_cfdc.c

deleted100644 → 0

+0 −448

Original line number	Diff line number	Diff line
		/*
		* 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/module.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 = {
		.owner = THIS_MODULE,
		.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;
		}

drivers/s390/scsi/zfcp_def.h

+0 −4

Original line number	Diff line number	Diff line
		@@ -86,10 +86,6 @@ struct zfcp_reqlist;
		#define ZFCP_STATUS_PORT_PHYS_OPEN 0x00000001
		#define ZFCP_STATUS_PORT_LINK_TEST 0x00000002

		/* logical unit status */
		#define ZFCP_STATUS_LUN_SHARED 0x00000004
		#define ZFCP_STATUS_LUN_READONLY 0x00000008

		/* FSF request status (this does not have a common part) */
		#define ZFCP_STATUS_FSFREQ_ERROR 0x00000008
		#define ZFCP_STATUS_FSFREQ_CLEANUP 0x00000010