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Commit 8a280399 authored by Greg Kroah-Hartman's avatar Greg Kroah-Hartman
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Staging: hv: coding style fixes for blkvsc_drv.c 

There are still some very long lines, someone needs to unwind the
logic there to resolve that.

Cc: Hank Janssen <hjanssen@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 163680b4
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Showing with 521 additions and 532 deletions
drivers/staging/hv/blkvsc_drv.c
View file @ 8a280399
/*
*
* Copyright (c) 2009, Microsoft Corporation.
*
* This program is free software; you can redistribute it and/or modify it
......@@ -17,9 +16,7 @@
*
* Authors:
* Hank Janssen <hjanssen@microsoft.com>
*
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/device.h>
......@@ -27,25 +24,18 @@
#include <linux/major.h>
#include <linux/delay.h>
#include <linux/hdreg.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_eh.h>
#include <scsi/scsi_dbg.h>
#include "osd.h"
#include "logging.h"
#include "vmbus.h"
#include "StorVscApi.h"
/* #defines */
#define BLKVSC_MINORS 64
/* Data types */
enum blkvsc_device_type {
UNKNOWN_DEV_TYPE,
HARDDISK_TYPE,
......@@ -60,19 +50,23 @@ enum blkvsc_device_type {
struct blkvsc_request_group {
int outstanding;
int status;
struct list_head blkvsc_req_list; /* list of blkvsc_requests */
};
struct blkvsc_request {
struct list_head req_entry; /* blkvsc_request_group.blkvsc_req_list */
/* blkvsc_request_group.blkvsc_req_list */
struct list_head req_entry;
struct list_head pend_entry; /* block_device_context.pending_list */
/* block_device_context.pending_list */
struct list_head pend_entry;
/* This may be null if we generate a request internally */
struct request *req;
struct request *req; /* This may be null if we generate a request internally */
struct block_device_context *dev;
struct blkvsc_request_group *group; /* The group this request is part of. Maybe null */
/* The group this request is part of. Maybe null */
struct blkvsc_request_group *group;
wait_queue_head_t wevent;
int cond;
......@@ -86,13 +80,18 @@ struct blkvsc_request {
unsigned char cmnd[MAX_COMMAND_SIZE];
struct hv_storvsc_request request;
/* !!!DO NOT ADD ANYTHING BELOW HERE!!! Otherwise, memory can overlap, because - */
/* The extension buffer falls right here and is pointed to by request.Extension; */
/*
* !!!DO NOT ADD ANYTHING BELOW HERE!!! Otherwise, memory can overlap,
* because - The extension buffer falls right here and is pointed to by
* request.Extension;
* Which sounds like a horrible idea, who designed this?
*/
};
/* Per device structure */
struct block_device_context {
struct device_context *device_ctx; /* point back to our device context */
/* point back to our device context */
struct device_context *device_ctx;
struct kmem_cache *request_pool;
spinlock_t lock;
struct gendisk *gd;
......@@ -115,6 +114,7 @@ struct block_device_context {
/* Per driver */
struct blkvsc_driver_context {
/* !! These must be the first 2 fields !! */
/* FIXME this is a bug! */
struct driver_context drv_ctx;
struct storvsc_driver_object drv_obj;
};
......@@ -133,8 +133,10 @@ static int blkvsc_ioctl(struct block_device *bd, fmode_t mode,
unsigned cmd, unsigned long argument);
static void blkvsc_request(struct request_queue *queue);
static void blkvsc_request_completion(struct hv_storvsc_request *request);
static int blkvsc_do_request(struct block_device_context *blkdev, struct request *req);
static int blkvsc_submit_request(struct blkvsc_request *blkvsc_req, void (*request_completion)(struct hv_storvsc_request*) );
static int blkvsc_do_request(struct block_device_context *blkdev,
struct request *req);
static int blkvsc_submit_request(struct blkvsc_request *blkvsc_req,
void (*request_completion)(struct hv_storvsc_request *));
static void blkvsc_init_rw(struct blkvsc_request *blkvsc_req);
static void blkvsc_cmd_completion(struct hv_storvsc_request *request);
static int blkvsc_do_inquiry(struct block_device_context *blkdev);
......@@ -150,9 +152,7 @@ static int blkvsc_ringbuffer_size = BLKVSC_RING_BUFFER_SIZE;
/* The one and only one */
static struct blkvsc_driver_context g_blkvsc_drv;
static struct block_device_operations block_ops =
{
static struct block_device_operations block_ops = {
.owner = THIS_MODULE,
.open = blkvsc_open,
.release = blkvsc_release,
......@@ -162,18 +162,14 @@ static struct block_device_operations block_ops =
.ioctl = blkvsc_ioctl,
};
/*++
Name: blkvsc_drv_init()
Desc: BlkVsc driver initialization.
--*/
/**
* blkvsc_drv_init - BlkVsc driver initialization.
*/
static int blkvsc_drv_init(PFN_DRIVERINITIALIZE pfn_drv_init)
{
int ret=0;
struct storvsc_driver_object *storvsc_drv_obj = &g_blkvsc_drv.drv_obj;
struct driver_context *drv_ctx=&g_blkvsc_drv.drv_ctx;
struct driver_context *drv_ctx = &g_blkvsc_drv.drv_ctx;
int ret;
DPRINT_ENTER(BLKVSC_DRV);
......@@ -185,7 +181,8 @@ static int blkvsc_drv_init(PFN_DRIVERINITIALIZE pfn_drv_init)
pfn_drv_init(&storvsc_drv_obj->Base);
drv_ctx->driver.name = storvsc_drv_obj->Base.name;
memcpy(&drv_ctx->class_id, &storvsc_drv_obj->Base.deviceType, sizeof(struct hv_guid));
memcpy(&drv_ctx->class_id, &storvsc_drv_obj->Base.deviceType,
sizeof(struct hv_guid));
drv_ctx->probe = blkvsc_probe;
drv_ctx->remove = blkvsc_remove;
......@@ -199,7 +196,6 @@ static int blkvsc_drv_init(PFN_DRIVERINITIALIZE pfn_drv_init)
return ret;
}
static int blkvsc_drv_exit_cb(struct device *dev, void *data)
{
struct device **curr = (struct device **)data;
......@@ -207,24 +203,16 @@ static int blkvsc_drv_exit_cb(struct device *dev, void *data)
return 1; /* stop iterating */
}
/*++
Name: blkvsc_drv_exit()
Desc:
--*/
static void blkvsc_drv_exit(void)
{
struct storvsc_driver_object *storvsc_drv_obj = &g_blkvsc_drv.drv_obj;
struct driver_context *drv_ctx=&g_blkvsc_drv.drv_ctx;
struct device *current_dev=NULL;
struct driver_context *drv_ctx = &g_blkvsc_drv.drv_ctx;
struct device *current_dev;
int ret;
DPRINT_ENTER(BLKVSC_DRV);
while (1)
{
while (1) {
current_dev = NULL;
/* Get the device */
......@@ -254,47 +242,40 @@ static void blkvsc_drv_exit(void)
return;
}
/*++
Name: blkvsc_probe()
Desc: Add a new device for this driver
--*/
/**
* blkvsc_probe - Add a new device for this driver
*/
static int blkvsc_probe(struct device *device)
{
int ret=0;
struct driver_context *driver_ctx = driver_to_driver_context(device->driver);
struct blkvsc_driver_context *blkvsc_drv_ctx = (struct blkvsc_driver_context*)driver_ctx;
struct storvsc_driver_object *storvsc_drv_obj = &blkvsc_drv_ctx->drv_obj;
struct driver_context *driver_ctx =
driver_to_driver_context(device->driver);
struct blkvsc_driver_context *blkvsc_drv_ctx =
(struct blkvsc_driver_context *)driver_ctx;
struct storvsc_driver_object *storvsc_drv_obj =
&blkvsc_drv_ctx->drv_obj;
struct device_context *device_ctx = device_to_device_context(device);
struct hv_device *device_obj = &device_ctx->device_obj;
struct block_device_context *blkdev=NULL;
struct block_device_context *blkdev = NULL;
struct storvsc_device_info device_info;
int major=0;
int devnum=0;
static int ide0_registered=0;
static int ide1_registered=0;
int major = 0;
int devnum = 0;
int ret = 0;
static int ide0_registered;
static int ide1_registered;
DPRINT_ENTER(BLKVSC_DRV);
DPRINT_DBG(BLKVSC_DRV, "blkvsc_probe - enter");
if (!storvsc_drv_obj->Base.OnDeviceAdd)
{
if (!storvsc_drv_obj->Base.OnDeviceAdd) {
DPRINT_ERR(BLKVSC_DRV, "OnDeviceAdd() not set");
ret = -1;
goto Cleanup;
}
blkdev = kzalloc(sizeof(struct block_device_context), GFP_KERNEL);
if (!blkdev)
{
if (!blkdev) {
ret = -ENOMEM;
goto Cleanup;
}
......@@ -304,13 +285,14 @@ static int blkvsc_probe(struct device *device)
/* Initialize what we can here */
spin_lock_init(&blkdev->lock);
ASSERT(sizeof(struct blkvsc_request_group) <= sizeof(struct blkvsc_request));
ASSERT(sizeof(struct blkvsc_request_group) <=
sizeof(struct blkvsc_request));
blkdev->request_pool = kmem_cache_create(dev_name(&device_ctx->device),
sizeof(struct blkvsc_request) + storvsc_drv_obj->RequestExtSize, 0,
sizeof(struct blkvsc_request) +
storvsc_drv_obj->RequestExtSize, 0,
SLAB_HWCACHE_ALIGN, NULL);
if (!blkdev->request_pool)
{
if (!blkdev->request_pool) {
ret = -ENOMEM;
goto Cleanup;
}
......@@ -318,56 +300,51 @@ static int blkvsc_probe(struct device *device)
/* Call to the vsc driver to add the device */
ret = storvsc_drv_obj->Base.OnDeviceAdd(device_obj, &device_info);
if (ret != 0)
{
if (ret != 0) {
DPRINT_ERR(BLKVSC_DRV, "unable to add blkvsc device");
goto Cleanup;
}
blkdev->device_ctx = device_ctx;
blkdev->target = device_info.TargetId; /* this identified the device 0 or 1 */
blkdev->path = device_info.PathId; /* this identified the ide ctrl 0 or 1 */
/* this identified the device 0 or 1 */
blkdev->target = device_info.TargetId;
/* this identified the ide ctrl 0 or 1 */
blkdev->path = device_info.PathId;
dev_set_drvdata(device, blkdev);
/* Calculate the major and device num */
if (blkdev->path == 0)
{
if (blkdev->path == 0) {
major = IDE0_MAJOR;
devnum = blkdev->path + blkdev->target; /* 0 or 1 */
if (!ide0_registered)
{
if (!ide0_registered) {
ret = register_blkdev(major, "ide");
if (ret != 0)
{
DPRINT_ERR(BLKVSC_DRV, "register_blkdev() failed! ret %d", ret);
if (ret != 0) {
DPRINT_ERR(BLKVSC_DRV,
"register_blkdev() failed! ret %d",
ret);
goto Remove;
}
ide0_registered = 1;
}
}
else if (blkdev->path == 1)
{
} else if (blkdev->path == 1) {
major = IDE1_MAJOR;
devnum = blkdev->path + blkdev->target + 1; /* 2 or 3 */
if (!ide1_registered)
{
if (!ide1_registered) {
ret = register_blkdev(major, "ide");
if (ret != 0)
{
DPRINT_ERR(BLKVSC_DRV, "register_blkdev() failed! ret %d", ret);
if (ret != 0) {
DPRINT_ERR(BLKVSC_DRV,
"register_blkdev() failed! ret %d",
ret);
goto Remove;
}
ide1_registered = 1;
}
}
else
{
} else {
DPRINT_ERR(BLKVSC_DRV, "invalid pathid");
ret = -1;
goto Cleanup;
......@@ -376,8 +353,7 @@ static int blkvsc_probe(struct device *device)
DPRINT_INFO(BLKVSC_DRV, "blkvsc registered for major %d!!", major);
blkdev->gd = alloc_disk(BLKVSC_MINORS);
if (!blkdev->gd)
{
if (!blkdev->gd) {
DPRINT_ERR(BLKVSC_DRV, "register_blkdev() failed! ret %d", ret);
ret = -1;
goto Cleanup;
......@@ -386,8 +362,10 @@ static int blkvsc_probe(struct device *device)
blkdev->gd->queue = blk_init_queue(blkvsc_request, &blkdev->lock);
blk_queue_max_segment_size(blkdev->gd->queue, PAGE_SIZE);
blk_queue_max_phys_segments(blkdev->gd->queue, MAX_MULTIPAGE_BUFFER_COUNT);
blk_queue_max_hw_segments(blkdev->gd->queue, MAX_MULTIPAGE_BUFFER_COUNT);
blk_queue_max_phys_segments(blkdev->gd->queue,
MAX_MULTIPAGE_BUFFER_COUNT);
blk_queue_max_hw_segments(blkdev->gd->queue,
MAX_MULTIPAGE_BUFFER_COUNT);
blk_queue_segment_boundary(blkdev->gd->queue, PAGE_SIZE-1);
blk_queue_bounce_limit(blkdev->gd->queue, BLK_BOUNCE_ANY);
blk_queue_dma_alignment(blkdev->gd->queue, 511);
......@@ -399,17 +377,14 @@ static int blkvsc_probe(struct device *device)
blkdev->gd->first_minor = 0;
blkdev->gd->fops = &block_ops;
blkdev->gd->private_data = blkdev;
sprintf(blkdev->gd->disk_name, "hd%c", 'a'+ devnum);
sprintf(blkdev->gd->disk_name, "hd%c", 'a' + devnum);
blkvsc_do_inquiry(blkdev);
if (blkdev->device_type == DVD_TYPE)
{
if (blkdev->device_type == DVD_TYPE) {
set_disk_ro(blkdev->gd, 1);
blkdev->gd->flags |= GENHD_FL_REMOVABLE;
blkvsc_do_read_capacity(blkdev);
}
else
{
} else {
blkvsc_do_read_capacity16(blkdev);
}
......@@ -418,7 +393,9 @@ static int blkvsc_probe(struct device *device)
/* go! */
add_disk(blkdev->gd);
DPRINT_INFO(BLKVSC_DRV, "%s added!! capacity %lu sector_size %d", blkdev->gd->disk_name, (unsigned long) blkdev->capacity, blkdev->sector_size);
DPRINT_INFO(BLKVSC_DRV, "%s added!! capacity %lu sector_size %d",
blkdev->gd->disk_name, (unsigned long)blkdev->capacity,
blkdev->sector_size);
return ret;
......@@ -426,10 +403,8 @@ static int blkvsc_probe(struct device *device)
storvsc_drv_obj->Base.OnDeviceRemove(device_obj);
Cleanup:
if (blkdev)
{
if (blkdev->request_pool)
{
if (blkdev) {
if (blkdev->request_pool) {
kmem_cache_destroy(blkdev->request_pool);
blkdev->request_pool = NULL;
}
......@@ -450,7 +425,8 @@ static void blkvsc_shutdown(struct device *device)
if (!blkdev)
return;
DPRINT_DBG(BLKVSC_DRV, "blkvsc_shutdown - users %d disk %s\n", blkdev->users, blkdev->gd->disk_name);
DPRINT_DBG(BLKVSC_DRV, "blkvsc_shutdown - users %d disk %s\n",
blkdev->users, blkdev->gd->disk_name);
spin_lock_irqsave(&blkdev->lock, flags);
......@@ -460,10 +436,9 @@ static void blkvsc_shutdown(struct device *device)
spin_unlock_irqrestore(&blkdev->lock, flags);
while (blkdev->num_outstanding_reqs)
{
DPRINT_INFO(STORVSC, "waiting for %d requests to complete...", blkdev->num_outstanding_reqs);
while (blkdev->num_outstanding_reqs) {
DPRINT_INFO(STORVSC, "waiting for %d requests to complete...",
blkdev->num_outstanding_reqs);
udelay(100);
}
......@@ -478,7 +453,7 @@ static void blkvsc_shutdown(struct device *device)
static int blkvsc_do_flush(struct block_device_context *blkdev)
{
struct blkvsc_request *blkvsc_req=NULL;
struct blkvsc_request *blkvsc_req;
DPRINT_DBG(BLKVSC_DRV, "blkvsc_do_flush()\n");
......@@ -487,9 +462,7 @@ static int blkvsc_do_flush(struct block_device_context *blkdev)
blkvsc_req = kmem_cache_alloc(blkdev->request_pool, GFP_KERNEL);
if (!blkvsc_req)
{
return -ENOMEM;
}
memset(blkvsc_req, 0, sizeof(struct blkvsc_request));
init_waitqueue_head(&blkvsc_req->wevent);
......@@ -504,8 +477,11 @@ static int blkvsc_do_flush(struct block_device_context *blkdev)
blkvsc_req->cmnd[0] = SYNCHRONIZE_CACHE;
blkvsc_req->cmd_len = 10;
/* Set this here since the completion routine may be invoked and completed before we return */
blkvsc_req->cond =0;
/*
* Set this here since the completion routine may be invoked and
* completed before we return
*/
blkvsc_req->cond = 0;
blkvsc_submit_request(blkvsc_req, blkvsc_cmd_completion);
wait_event_interruptible(blkvsc_req->wevent, blkvsc_req->cond);
......@@ -518,7 +494,7 @@ static int blkvsc_do_flush(struct block_device_context *blkdev)
/* Do a scsi INQUIRY cmd here to get the device type (ie disk or dvd) */
static int blkvsc_do_inquiry(struct block_device_context *blkdev)
{
struct blkvsc_request *blkvsc_req=NULL;
struct blkvsc_request *blkvsc_req;
struct page *page_buf;
unsigned char *buf;
unsigned char device_type;
......@@ -527,14 +503,11 @@ static int blkvsc_do_inquiry(struct block_device_context *blkdev)
blkvsc_req = kmem_cache_alloc(blkdev->request_pool, GFP_KERNEL);
if (!blkvsc_req)
{
return -ENOMEM;
}
memset(blkvsc_req, 0, sizeof(struct blkvsc_request));
page_buf = alloc_page(GFP_KERNEL);
if (!page_buf)
{
if (!page_buf) {
kmem_cache_free(blkvsc_req->dev->request_pool, blkvsc_req);
return -ENOMEM;
}
......@@ -554,12 +527,16 @@ static int blkvsc_do_inquiry(struct block_device_context *blkdev)
blkvsc_req->cmnd[4] = 64;
blkvsc_req->cmd_len = 6;
/* Set this here since the completion routine may be invoked and completed before we return */
blkvsc_req->cond =0;
/*
* Set this here since the completion routine may be invoked and
* completed before we return
*/
blkvsc_req->cond = 0;
blkvsc_submit_request(blkvsc_req, blkvsc_cmd_completion);
DPRINT_DBG(BLKVSC_DRV, "waiting %p to complete - cond %d\n", blkvsc_req, blkvsc_req->cond);
DPRINT_DBG(BLKVSC_DRV, "waiting %p to complete - cond %d\n",
blkvsc_req, blkvsc_req->cond);
wait_event_interruptible(blkvsc_req->wevent, blkvsc_req->cond);
......@@ -569,16 +546,11 @@ static int blkvsc_do_inquiry(struct block_device_context *blkdev)
/* be to le */
device_type = buf[0] & 0x1F;
if (device_type == 0x0)
{
if (device_type == 0x0) {
blkdev->device_type = HARDDISK_TYPE;
}
else if (device_type == 0x5)
{
} else if (device_type == 0x5) {
blkdev->device_type = DVD_TYPE;
}
else
{
} else {
/* TODO: this is currently unsupported device type */
blkdev->device_type = UNKNOWN_DEV_TYPE;
}
......@@ -605,7 +577,7 @@ static int blkvsc_do_inquiry(struct block_device_context *blkdev)
/* Do a scsi READ_CAPACITY cmd here to get the size of the disk */
static int blkvsc_do_read_capacity(struct block_device_context *blkdev)
{
struct blkvsc_request *blkvsc_req=NULL;
struct blkvsc_request *blkvsc_req;
struct page *page_buf;
unsigned char *buf;
struct scsi_sense_hdr sense_hdr;
......@@ -618,14 +590,11 @@ static int blkvsc_do_read_capacity(struct block_device_context *blkdev)
blkvsc_req = kmem_cache_alloc(blkdev->request_pool, GFP_KERNEL);
if (!blkvsc_req)
{
return -ENOMEM;
}
memset(blkvsc_req, 0, sizeof(struct blkvsc_request));
page_buf = alloc_page(GFP_KERNEL);
if (!page_buf)
{
if (!page_buf) {
kmem_cache_free(blkvsc_req->dev->request_pool, blkvsc_req);
return -ENOMEM;
}
......@@ -646,31 +615,33 @@ static int blkvsc_do_read_capacity(struct block_device_context *blkdev)
* Set this here since the completion routine may be invoked
* and completed before we return
*/
blkvsc_req->cond =0;
blkvsc_req->cond = 0;
blkvsc_submit_request(blkvsc_req, blkvsc_cmd_completion);
DPRINT_DBG(BLKVSC_DRV, "waiting %p to complete - cond %d\n", blkvsc_req, blkvsc_req->cond);
DPRINT_DBG(BLKVSC_DRV, "waiting %p to complete - cond %d\n",
blkvsc_req, blkvsc_req->cond);
wait_event_interruptible(blkvsc_req->wevent, blkvsc_req->cond);
/* check error */
if (blkvsc_req->request.Status)
{
scsi_normalize_sense(blkvsc_req->sense_buffer, SCSI_SENSE_BUFFERSIZE, &sense_hdr);
if (blkvsc_req->request.Status) {
scsi_normalize_sense(blkvsc_req->sense_buffer,
SCSI_SENSE_BUFFERSIZE, &sense_hdr);
if (sense_hdr.asc == 0x3A) /* Medium not present */
{
if (sense_hdr.asc == 0x3A) {
/* Medium not present */
blkdev->media_not_present = 1;
}
return 0;
}
buf = kmap(page_buf);
/* be to le */
blkdev->capacity = ((buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3]) + 1;
blkdev->sector_size = (buf[4] << 24) | (buf[5] << 16) | (buf[6] << 8) | buf[7];
blkdev->capacity = ((buf[0] << 24) | (buf[1] << 16) |
(buf[2] << 8) | buf[3]) + 1;
blkdev->sector_size = (buf[4] << 24) | (buf[5] << 16) |
(buf[6] << 8) | buf[7];
kunmap(page_buf);
......@@ -681,10 +652,9 @@ static int blkvsc_do_read_capacity(struct block_device_context *blkdev)
return 0;
}
static int blkvsc_do_read_capacity16(struct block_device_context *blkdev)
{
struct blkvsc_request *blkvsc_req=NULL;
struct blkvsc_request *blkvsc_req;
struct page *page_buf;
unsigned char *buf;
struct scsi_sense_hdr sense_hdr;
......@@ -697,14 +667,11 @@ static int blkvsc_do_read_capacity16(struct block_device_context *blkdev)
blkvsc_req = kmem_cache_alloc(blkdev->request_pool, GFP_KERNEL);
if (!blkvsc_req)
{
return -ENOMEM;
}
memset(blkvsc_req, 0, sizeof(struct blkvsc_request));
page_buf = alloc_page(GFP_KERNEL);
if (!page_buf)
{
if (!page_buf) {
kmem_cache_free(blkvsc_req->dev->request_pool, blkvsc_req);
return -ENOMEM;
}
......@@ -725,34 +692,37 @@ static int blkvsc_do_read_capacity16(struct block_device_context *blkdev)
* Set this here since the completion routine may be invoked
* and completed before we return
*/
blkvsc_req->cond =0;
blkvsc_req->cond = 0;
blkvsc_submit_request(blkvsc_req, blkvsc_cmd_completion);
DPRINT_DBG(BLKVSC_DRV, "waiting %p to complete - cond %d\n", blkvsc_req, blkvsc_req->cond);
DPRINT_DBG(BLKVSC_DRV, "waiting %p to complete - cond %d\n",
blkvsc_req, blkvsc_req->cond);
wait_event_interruptible(blkvsc_req->wevent, blkvsc_req->cond);
/* check error */
if (blkvsc_req->request.Status)
{
scsi_normalize_sense(blkvsc_req->sense_buffer, SCSI_SENSE_BUFFERSIZE, &sense_hdr);
if (sense_hdr.asc == 0x3A) /* Medium not present */
{
if (blkvsc_req->request.Status) {
scsi_normalize_sense(blkvsc_req->sense_buffer,
SCSI_SENSE_BUFFERSIZE, &sense_hdr);
if (sense_hdr.asc == 0x3A) {
/* Medium not present */
blkdev->media_not_present = 1;
}
return 0;
}
buf = kmap(page_buf);
/* be to le */
blkdev->capacity = be64_to_cpu(*(unsigned long long*) &buf[0]) + 1;
blkdev->sector_size = be32_to_cpu(*(unsigned int*)&buf[8]);
blkdev->capacity = be64_to_cpu(*(unsigned long long *) &buf[0]) + 1;
blkdev->sector_size = be32_to_cpu(*(unsigned int *)&buf[8]);
/* blkdev->capacity = ((buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3]) + 1; */
/* blkdev->sector_size = (buf[4] << 24) | (buf[5] << 16) | (buf[6] << 8) | buf[7]; */
#if 0
blkdev->capacity = ((buf[0] << 24) | (buf[1] << 16) |
(buf[2] << 8) | buf[3]) + 1;
blkdev->sector_size = (buf[4] << 24) | (buf[5] << 16) |
(buf[6] << 8) | buf[7];
#endif
kunmap(page_buf);
......@@ -763,42 +733,41 @@ static int blkvsc_do_read_capacity16(struct block_device_context *blkdev)
return 0;
}
/*++
Name: blkvsc_remove()
Desc: Callback when our device is removed
--*/
/**
* blkvsc_remove() - Callback when our device is removed
*/
static int blkvsc_remove(struct device *device)
{
int ret=0;
struct driver_context *driver_ctx = driver_to_driver_context(device->driver);
struct blkvsc_driver_context *blkvsc_drv_ctx = (struct blkvsc_driver_context*)driver_ctx;
struct storvsc_driver_object *storvsc_drv_obj = &blkvsc_drv_ctx->drv_obj;
struct driver_context *driver_ctx =
driver_to_driver_context(device->driver);
struct blkvsc_driver_context *blkvsc_drv_ctx =
(struct blkvsc_driver_context *)driver_ctx;
struct storvsc_driver_object *storvsc_drv_obj =
&blkvsc_drv_ctx->drv_obj;
struct device_context *device_ctx = device_to_device_context(device);
struct hv_device *device_obj = &device_ctx->device_obj;
struct block_device_context *blkdev = dev_get_drvdata(device);
unsigned long flags;
int ret;
DPRINT_ENTER(BLKVSC_DRV);
DPRINT_DBG(BLKVSC_DRV, "blkvsc_remove()\n");
if (!storvsc_drv_obj->Base.OnDeviceRemove)
{
if (!storvsc_drv_obj->Base.OnDeviceRemove) {
DPRINT_EXIT(BLKVSC_DRV);
return -1;
}
/* Call to the vsc driver to let it know that the device is being removed */
/*
* Call to the vsc driver to let it know that the device is being
* removed
*/
ret = storvsc_drv_obj->Base.OnDeviceRemove(device_obj);
if (ret != 0)
{
if (ret != 0) {
/* TODO: */
DPRINT_ERR(BLKVSC_DRV, "unable to remove blkvsc device (ret %d)", ret);
DPRINT_ERR(BLKVSC_DRV,
"unable to remove blkvsc device (ret %d)", ret);
}
/* Get to a known state */
......@@ -810,10 +779,9 @@ static int blkvsc_remove(struct device *device)
spin_unlock_irqrestore(&blkdev->lock, flags);
while (blkdev->num_outstanding_reqs)
{
DPRINT_INFO(STORVSC, "waiting for %d requests to complete...", blkdev->num_outstanding_reqs);
while (blkdev->num_outstanding_reqs) {
DPRINT_INFO(STORVSC, "waiting for %d requests to complete...",
blkdev->num_outstanding_reqs);
udelay(100);
}
......@@ -845,92 +813,89 @@ static void blkvsc_init_rw(struct blkvsc_request *blkvsc_req)
blkvsc_req->cmd_len = 16;
if (blkvsc_req->sector_start > 0xffffffff)
{
if (rq_data_dir(blkvsc_req->req))
{
if (blkvsc_req->sector_start > 0xffffffff) {
if (rq_data_dir(blkvsc_req->req)) {
blkvsc_req->write = 1;
blkvsc_req->cmnd[0] = WRITE_16;
}
else
{
} else {
blkvsc_req->write = 0;
blkvsc_req->cmnd[0] = READ_16;
}
blkvsc_req->cmnd[1] |= blk_fua_rq(blkvsc_req->req) ? 0x8 : 0;
*(unsigned long long*)&blkvsc_req->cmnd[2] = cpu_to_be64(blkvsc_req->sector_start);
*(unsigned int*)&blkvsc_req->cmnd[10] = cpu_to_be32(blkvsc_req->sector_count);
}
else if ((blkvsc_req->sector_count > 0xff) || (blkvsc_req->sector_start > 0x1fffff))
{
if (rq_data_dir(blkvsc_req->req))
{
*(unsigned long long *)&blkvsc_req->cmnd[2] =
cpu_to_be64(blkvsc_req->sector_start);
*(unsigned int *)&blkvsc_req->cmnd[10] =
cpu_to_be32(blkvsc_req->sector_count);
} else if ((blkvsc_req->sector_count > 0xff) ||
(blkvsc_req->sector_start > 0x1fffff)) {
if (rq_data_dir(blkvsc_req->req)) {
blkvsc_req->write = 1;
blkvsc_req->cmnd[0] = WRITE_10;
}
else
{
} else {
blkvsc_req->write = 0;
blkvsc_req->cmnd[0] = READ_10;
}
blkvsc_req->cmnd[1] |= blk_fua_rq(blkvsc_req->req) ? 0x8 : 0;
*(unsigned int *)&blkvsc_req->cmnd[2] = cpu_to_be32(blkvsc_req->sector_start);
*(unsigned short*)&blkvsc_req->cmnd[7] = cpu_to_be16(blkvsc_req->sector_count);
}
else
{
if (rq_data_dir(blkvsc_req->req))
{
*(unsigned int *)&blkvsc_req->cmnd[2] =
cpu_to_be32(blkvsc_req->sector_start);
*(unsigned short *)&blkvsc_req->cmnd[7] =
cpu_to_be16(blkvsc_req->sector_count);
} else {
if (rq_data_dir(blkvsc_req->req)) {
blkvsc_req->write = 1;
blkvsc_req->cmnd[0] = WRITE_6;
}
else
{
} else {
blkvsc_req->write = 0;
blkvsc_req->cmnd[0] = READ_6;
}
*(unsigned int *)&blkvsc_req->cmnd[1] = cpu_to_be32(blkvsc_req->sector_start) >> 8;
*(unsigned int *)&blkvsc_req->cmnd[1] =
cpu_to_be32(blkvsc_req->sector_start) >> 8;
blkvsc_req->cmnd[1] &= 0x1f;
blkvsc_req->cmnd[4] = (unsigned char) blkvsc_req->sector_count;
blkvsc_req->cmnd[4] = (unsigned char)blkvsc_req->sector_count;
}
}
static int blkvsc_submit_request(struct blkvsc_request *blkvsc_req, void (*request_completion)(struct hv_storvsc_request*) )
static int blkvsc_submit_request(struct blkvsc_request *blkvsc_req,
void (*request_completion)(struct hv_storvsc_request *))
{
struct block_device_context *blkdev = blkvsc_req->dev;
struct device_context *device_ctx=blkdev->device_ctx;
struct driver_context *driver_ctx = driver_to_driver_context(device_ctx->device.driver);
struct blkvsc_driver_context *blkvsc_drv_ctx = (struct blkvsc_driver_context*)driver_ctx;
struct storvsc_driver_object *storvsc_drv_obj = &blkvsc_drv_ctx->drv_obj;
int ret =0;
struct device_context *device_ctx = blkdev->device_ctx;
struct driver_context *driver_ctx =
driver_to_driver_context(device_ctx->device.driver);
struct blkvsc_driver_context *blkvsc_drv_ctx =
(struct blkvsc_driver_context *)driver_ctx;
struct storvsc_driver_object *storvsc_drv_obj =
&blkvsc_drv_ctx->drv_obj;
struct hv_storvsc_request *storvsc_req;
int ret;
DPRINT_DBG(BLKVSC_DRV, "blkvsc_submit_request() - req %p type %s start_sector %lu count %ld offset %d len %d\n",
blkvsc_req,
(blkvsc_req->write)?"WRITE":"READ",
DPRINT_DBG(BLKVSC_DRV, "blkvsc_submit_request() - "
"req %p type %s start_sector %lu count %ld offset %d "
"len %d\n", blkvsc_req,
(blkvsc_req->write) ? "WRITE" : "READ",
(unsigned long) blkvsc_req->sector_start,
blkvsc_req->sector_count,
blkvsc_req->request.DataBuffer.Offset,
blkvsc_req->request.DataBuffer.Length);
/*for (i=0; i < (blkvsc_req->request.DataBuffer.Length >> 12); i++)
{
DPRINT_DBG(BLKVSC_DRV, "blkvsc_submit_request() - req %p pfn[%d] %llx\n",
blkvsc_req,
i,
#if 0
for (i = 0; i < (blkvsc_req->request.DataBuffer.Length >> 12); i++) {
DPRINT_DBG(BLKVSC_DRV, "blkvsc_submit_request() - "
"req %p pfn[%d] %llx\n",
blkvsc_req, i,
blkvsc_req->request.DataBuffer.PfnArray[i]);
}*/
}
#endif
storvsc_req = &blkvsc_req->request;
storvsc_req->Extension = (void*)((unsigned long)blkvsc_req + sizeof(struct blkvsc_request));
storvsc_req->Extension = (void *)((unsigned long)blkvsc_req +
sizeof(struct blkvsc_request));
storvsc_req->Type = blkvsc_req->write? WRITE_TYPE : READ_TYPE;
storvsc_req->Type = blkvsc_req->write ? WRITE_TYPE : READ_TYPE;
storvsc_req->OnIOCompletion = request_completion;
storvsc_req->Context = blkvsc_req;
......@@ -946,47 +911,42 @@ static int blkvsc_submit_request(struct blkvsc_request *blkvsc_req, void (*reque
storvsc_req->SenseBuffer = blkvsc_req->sense_buffer;
storvsc_req->SenseBufferSize = SCSI_SENSE_BUFFERSIZE;
ret = storvsc_drv_obj->OnIORequest(&blkdev->device_ctx->device_obj, &blkvsc_req->request);
ret = storvsc_drv_obj->OnIORequest(&blkdev->device_ctx->device_obj,
&blkvsc_req->request);
if (ret == 0)
{
blkdev->num_outstanding_reqs++;
}
return ret;
}
/*
* We break the request into 1 or more blkvsc_requests and submit
* them. If we cant submit them all, we put them on the
* pending_list. The blkvsc_request() will work on the pending_list.
*/
static int blkvsc_do_request(struct block_device_context *blkdev, struct request *req)
static int blkvsc_do_request(struct block_device_context *blkdev,
struct request *req)
{
struct bio *bio=NULL;
struct bio_vec *bvec=NULL;
struct bio_vec *prev_bvec=NULL;
struct blkvsc_request *blkvsc_req=NULL;
struct bio *bio = NULL;
struct bio_vec *bvec = NULL;
struct bio_vec *prev_bvec = NULL;
struct blkvsc_request *blkvsc_req = NULL;
struct blkvsc_request *tmp;
int databuf_idx=0;
int seg_idx=0;
int databuf_idx = 0;
int seg_idx = 0;
sector_t start_sector;
unsigned long num_sectors = 0;
int ret=0;
int pending=0;
struct blkvsc_request_group *group=NULL;
int ret = 0;
int pending = 0;
struct blkvsc_request_group *group = NULL;
DPRINT_DBG(BLKVSC_DRV, "blkdev %p req %p sect %lu \n", blkdev, req, (unsigned long) blk_rq_pos(req));
DPRINT_DBG(BLKVSC_DRV, "blkdev %p req %p sect %lu \n", blkdev, req,
(unsigned long)blk_rq_pos(req));
/* Create a group to tie req to list of blkvsc_reqs */
group = (struct blkvsc_request_group*)kmem_cache_alloc(blkdev->request_pool, GFP_ATOMIC);
group = kmem_cache_alloc(blkdev->request_pool, GFP_ATOMIC);
if (!group)
{
return -ENOMEM;
}
INIT_LIST_HEAD(&group->blkvsc_req_list);
group->outstanding = group->status = 0;
......@@ -994,39 +954,46 @@ static int blkvsc_do_request(struct block_device_context *blkdev, struct request
start_sector = blk_rq_pos(req);
/* foreach bio in the request */
if (req->bio)
for (bio = req->bio; bio; bio = bio->bi_next)
{
/* Map this bio into an existing or new storvsc request */
bio_for_each_segment (bvec, bio, seg_idx)
{
DPRINT_DBG(BLKVSC_DRV, "bio_for_each_segment() - req %p bio %p bvec %p seg_idx %d databuf_idx %d\n",
req, bio, bvec, seg_idx, databuf_idx);
if (req->bio) {
for (bio = req->bio; bio; bio = bio->bi_next) {
/*
* Map this bio into an existing or new storvsc request
*/
bio_for_each_segment(bvec, bio, seg_idx) {
DPRINT_DBG(BLKVSC_DRV, "bio_for_each_segment() "
"- req %p bio %p bvec %p seg_idx %d "
"databuf_idx %d\n", req, bio, bvec,
seg_idx, databuf_idx);
/* Get a new storvsc request */
if ( (!blkvsc_req) || /* 1st-time */
(databuf_idx >= MAX_MULTIPAGE_BUFFER_COUNT) ||
(bvec->bv_offset != 0) || /* hole at the begin of page */
(prev_bvec && (prev_bvec->bv_len != PAGE_SIZE)) ) /* hold at the end of page */
{
/* 1st-time */
if ((!blkvsc_req) ||
(databuf_idx >= MAX_MULTIPAGE_BUFFER_COUNT)
/* hole at the begin of page */
|| (bvec->bv_offset != 0) ||
/* hold at the end of page */
(prev_bvec &&
(prev_bvec->bv_len != PAGE_SIZE))) {
/* submit the prev one */
if (blkvsc_req)
{
if (blkvsc_req) {
blkvsc_req->sector_start = start_sector;
sector_div(blkvsc_req->sector_start, (blkdev->sector_size >> 9));
blkvsc_req->sector_count = num_sectors / (blkdev->sector_size >> 9);
blkvsc_init_rw(blkvsc_req);
}
/* Create new blkvsc_req to represent the current bvec */
/*
* Create new blkvsc_req to represent
* the current bvec
*/
blkvsc_req = kmem_cache_alloc(blkdev->request_pool, GFP_ATOMIC);
if (!blkvsc_req)
{
if (!blkvsc_req) {
/* free up everything */
list_for_each_entry_safe(blkvsc_req, tmp, &group->blkvsc_req_list, req_entry)
{
list_for_each_entry_safe(
blkvsc_req, tmp,
&group->blkvsc_req_list,
req_entry) {
list_del(&blkvsc_req->req_entry);
kmem_cache_free(blkdev->request_pool, blkvsc_req);
}
......@@ -1035,7 +1002,8 @@ static int blkvsc_do_request(struct block_device_context *blkdev, struct request
return -ENOMEM;
}
memset(blkvsc_req, 0, sizeof(struct blkvsc_request));
memset(blkvsc_req, 0,
sizeof(struct blkvsc_request));
blkvsc_req->dev = blkdev;
blkvsc_req->req = req;
......@@ -1045,7 +1013,8 @@ static int blkvsc_do_request(struct block_device_context *blkdev, struct request
/* Add to the group */
blkvsc_req->group = group;
blkvsc_req->group->outstanding++;
list_add_tail(&blkvsc_req->req_entry, &blkvsc_req->group->blkvsc_req_list);
list_add_tail(&blkvsc_req->req_entry,
&blkvsc_req->group->blkvsc_req_list);
start_sector += num_sectors;
num_sectors = 0;
......@@ -1064,40 +1033,52 @@ static int blkvsc_do_request(struct block_device_context *blkdev, struct request
} /* bio_for_each_segment */
} /* rq_for_each_bio */
}
/* Handle the last one */
if (blkvsc_req)
{
DPRINT_DBG(BLKVSC_DRV, "blkdev %p req %p group %p count %d\n", blkdev, req, blkvsc_req->group, blkvsc_req->group->outstanding);
if (blkvsc_req) {
DPRINT_DBG(BLKVSC_DRV, "blkdev %p req %p group %p count %d\n",
blkdev, req, blkvsc_req->group,
blkvsc_req->group->outstanding);
blkvsc_req->sector_start = start_sector;
sector_div(blkvsc_req->sector_start, (blkdev->sector_size >> 9));
sector_div(blkvsc_req->sector_start,
(blkdev->sector_size >> 9));
blkvsc_req->sector_count = num_sectors / (blkdev->sector_size >> 9);
blkvsc_req->sector_count = num_sectors /
(blkdev->sector_size >> 9);
blkvsc_init_rw(blkvsc_req);
}
list_for_each_entry(blkvsc_req, &group->blkvsc_req_list, req_entry)
{
if (pending)
{
DPRINT_DBG(BLKVSC_DRV, "adding blkvsc_req to pending_list - blkvsc_req %p start_sect %lu sect_count %ld (%lu %ld)\n",
blkvsc_req, (unsigned long)blkvsc_req->sector_start, blkvsc_req->sector_count, (unsigned long) start_sector, (unsigned long) num_sectors);
list_add_tail(&blkvsc_req->pend_entry, &blkdev->pending_list);
}
else
{
ret = blkvsc_submit_request(blkvsc_req, blkvsc_request_completion);
if (ret == -1)
{
list_for_each_entry(blkvsc_req, &group->blkvsc_req_list, req_entry) {
if (pending) {
DPRINT_DBG(BLKVSC_DRV, "adding blkvsc_req to "
"pending_list - blkvsc_req %p start_sect %lu"
" sect_count %ld (%lu %ld)\n", blkvsc_req,
(unsigned long)blkvsc_req->sector_start,
blkvsc_req->sector_count,
(unsigned long)start_sector,
(unsigned long)num_sectors);
list_add_tail(&blkvsc_req->pend_entry,
&blkdev->pending_list);
} else {
ret = blkvsc_submit_request(blkvsc_req,
blkvsc_request_completion);
if (ret == -1) {
pending = 1;
list_add_tail(&blkvsc_req->pend_entry, &blkdev->pending_list);
list_add_tail(&blkvsc_req->pend_entry,
&blkdev->pending_list);
}
DPRINT_DBG(BLKVSC_DRV, "submitted blkvsc_req %p start_sect %lu sect_count %ld (%lu %ld) ret %d\n",
blkvsc_req, (unsigned long) blkvsc_req->sector_start, blkvsc_req->sector_count, (unsigned long) start_sector, num_sectors, ret);
DPRINT_DBG(BLKVSC_DRV, "submitted blkvsc_req %p "
"start_sect %lu sect_count %ld (%lu %ld) "
"ret %d\n", blkvsc_req,
(unsigned long)blkvsc_req->sector_start,
blkvsc_req->sector_count,
(unsigned long)start_sector,
num_sectors, ret);
}
}
......@@ -1106,42 +1087,43 @@ static int blkvsc_do_request(struct block_device_context *blkdev, struct request
static void blkvsc_cmd_completion(struct hv_storvsc_request *request)
{
struct blkvsc_request *blkvsc_req=(struct blkvsc_request*)request->Context;
struct block_device_context *blkdev = (struct block_device_context*)blkvsc_req->dev;
struct blkvsc_request *blkvsc_req =
(struct blkvsc_request *)request->Context;
struct block_device_context *blkdev =
(struct block_device_context *)blkvsc_req->dev;
struct scsi_sense_hdr sense_hdr;
DPRINT_DBG(BLKVSC_DRV, "blkvsc_cmd_completion() - req %p\n", blkvsc_req);
DPRINT_DBG(BLKVSC_DRV, "blkvsc_cmd_completion() - req %p\n",
blkvsc_req);
blkdev->num_outstanding_reqs--;
if (blkvsc_req->request.Status)
{
if (scsi_normalize_sense(blkvsc_req->sense_buffer, SCSI_SENSE_BUFFERSIZE, &sense_hdr))
{
if (scsi_normalize_sense(blkvsc_req->sense_buffer,
SCSI_SENSE_BUFFERSIZE, &sense_hdr))
scsi_print_sense_hdr("blkvsc", &sense_hdr);
}
}
blkvsc_req->cond =1;
blkvsc_req->cond = 1;
wake_up_interruptible(&blkvsc_req->wevent);
}
static void blkvsc_request_completion(struct hv_storvsc_request *request)
{
struct blkvsc_request *blkvsc_req=(struct blkvsc_request*)request->Context;
struct block_device_context *blkdev = (struct block_device_context*)blkvsc_req->dev;
struct blkvsc_request *blkvsc_req =
(struct blkvsc_request *)request->Context;
struct block_device_context *blkdev =
(struct block_device_context *)blkvsc_req->dev;
unsigned long flags;
struct blkvsc_request *comp_req, *tmp;
ASSERT(blkvsc_req->group);
DPRINT_DBG(BLKVSC_DRV, "blkdev %p blkvsc_req %p group %p type %s sect_start %lu sect_count %ld len %d group outstd %d total outstd %d\n",
blkdev,
blkvsc_req,
blkvsc_req->group,
(blkvsc_req->write)?"WRITE":"READ",
(unsigned long) blkvsc_req->sector_start,
DPRINT_DBG(BLKVSC_DRV, "blkdev %p blkvsc_req %p group %p type %s "
"sect_start %lu sect_count %ld len %d group outstd %d "
"total outstd %d\n",
blkdev, blkvsc_req, blkvsc_req->group,
(blkvsc_req->write) ? "WRITE" : "READ",
(unsigned long)blkvsc_req->sector_start,
blkvsc_req->sector_count,
blkvsc_req->request.DataBuffer.Length,
blkvsc_req->group->outstanding,
......@@ -1157,32 +1139,35 @@ static void blkvsc_request_completion(struct hv_storvsc_request *request)
* completed. This guarantees no out-of-order blkvsc_req
* completion when calling end_that_request_first()
*/
if (blkvsc_req->group->outstanding == 0)
{
list_for_each_entry_safe(comp_req, tmp, &blkvsc_req->group->blkvsc_req_list, req_entry)
{
DPRINT_DBG(BLKVSC_DRV, "completing blkvsc_req %p sect_start %lu sect_count %ld \n",
if (blkvsc_req->group->outstanding == 0) {
list_for_each_entry_safe(comp_req, tmp,
&blkvsc_req->group->blkvsc_req_list,
req_entry) {
DPRINT_DBG(BLKVSC_DRV, "completing blkvsc_req %p "
"sect_start %lu sect_count %ld \n",
comp_req,
(unsigned long) comp_req->sector_start,
(unsigned long)comp_req->sector_start,
comp_req->sector_count);
list_del(&comp_req->req_entry);
if (!__blk_end_request(
comp_req->req,
(!comp_req->request.Status ? 0: -EIO),
comp_req->sector_count * blkdev->sector_size))
{
/* All the sectors have been xferred ie the request is done */
DPRINT_DBG(BLKVSC_DRV, "req %p COMPLETED\n", comp_req->req);
kmem_cache_free(blkdev->request_pool, comp_req->group);
if (!__blk_end_request(comp_req->req,
(!comp_req->request.Status ? 0 : -EIO),
comp_req->sector_count * blkdev->sector_size)) {
/*
* All the sectors have been xferred ie the
* request is done
*/
DPRINT_DBG(BLKVSC_DRV, "req %p COMPLETED\n",
comp_req->req);
kmem_cache_free(blkdev->request_pool,
comp_req->group);
}
kmem_cache_free(blkdev->request_pool, comp_req);
}
if (!blkdev->shutting_down)
{
if (!blkdev->shutting_down) {
blkvsc_do_pending_reqs(blkdev);
blk_start_queue(blkdev->gd->queue);
blkvsc_request(blkdev->gd->queue);
......@@ -1197,21 +1182,23 @@ static int blkvsc_cancel_pending_reqs(struct block_device_context *blkdev)
struct blkvsc_request *pend_req, *tmp;
struct blkvsc_request *comp_req, *tmp2;
int ret=0;
int ret = 0;
DPRINT_DBG(BLKVSC_DRV, "blkvsc_cancel_pending_reqs()");
/* Flush the pending list first */
list_for_each_entry_safe(pend_req, tmp, &blkdev->pending_list, pend_entry)
{
list_for_each_entry_safe(pend_req, tmp, &blkdev->pending_list,
pend_entry) {
/*
* The pend_req could be part of a partially completed
* request. If so, complete those req first until we
* hit the pend_req
*/
list_for_each_entry_safe(comp_req, tmp2, &pend_req->group->blkvsc_req_list, req_entry)
{
DPRINT_DBG(BLKVSC_DRV, "completing blkvsc_req %p sect_start %lu sect_count %ld \n",
list_for_each_entry_safe(comp_req, tmp2,
&pend_req->group->blkvsc_req_list,
req_entry) {
DPRINT_DBG(BLKVSC_DRV, "completing blkvsc_req %p "
"sect_start %lu sect_count %ld \n",
comp_req,
(unsigned long) comp_req->sector_start,
comp_req->sector_count);
......@@ -1221,34 +1208,37 @@ static int blkvsc_cancel_pending_reqs(struct block_device_context *blkdev)
list_del(&comp_req->req_entry);
if (comp_req->req)
{
ret = __blk_end_request(
comp_req->req,
if (comp_req->req) {
ret = __blk_end_request(comp_req->req,
(!comp_req->request.Status ? 0 : -EIO),
comp_req->sector_count * blkdev->sector_size);
comp_req->sector_count *
blkdev->sector_size);
ASSERT(ret != 0);
}
kmem_cache_free(blkdev->request_pool, comp_req);
}
DPRINT_DBG(BLKVSC_DRV, "cancelling pending request - %p\n", pend_req);
DPRINT_DBG(BLKVSC_DRV, "cancelling pending request - %p\n",
pend_req);
list_del(&pend_req->pend_entry);
list_del(&pend_req->req_entry);
if (comp_req->req)
{
if (!__blk_end_request(
pend_req->req,
-EIO,
pend_req->sector_count * blkdev->sector_size))
{
/* All the sectors have been xferred ie the request is done */
DPRINT_DBG(BLKVSC_DRV, "blkvsc_cancel_pending_reqs() - req %p COMPLETED\n", pend_req->req);
kmem_cache_free(blkdev->request_pool, pend_req->group);
if (comp_req->req) {
if (!__blk_end_request(pend_req->req, -EIO,
pend_req->sector_count *
blkdev->sector_size)) {
/*
* All the sectors have been xferred ie the
* request is done
*/
DPRINT_DBG(BLKVSC_DRV,
"blkvsc_cancel_pending_reqs() - "
"req %p COMPLETED\n", pend_req->req);
kmem_cache_free(blkdev->request_pool,
pend_req->group);
}
}
......@@ -1261,23 +1251,21 @@ static int blkvsc_cancel_pending_reqs(struct block_device_context *blkdev)
static int blkvsc_do_pending_reqs(struct block_device_context *blkdev)
{
struct blkvsc_request *pend_req, *tmp;
int ret=0;
int ret = 0;
/* Flush the pending list first */
list_for_each_entry_safe(pend_req, tmp, &blkdev->pending_list, pend_entry)
{
DPRINT_DBG(BLKVSC_DRV, "working off pending_list - %p\n", pend_req);
list_for_each_entry_safe(pend_req, tmp, &blkdev->pending_list,
pend_entry) {
DPRINT_DBG(BLKVSC_DRV, "working off pending_list - %p\n",
pend_req);
ret = blkvsc_submit_request(pend_req, blkvsc_request_completion);
ret = blkvsc_submit_request(pend_req,
blkvsc_request_completion);
if (ret != 0)
{
break;
}
else
{
list_del(&pend_req->pend_entry);
}
}
return ret;
}
......@@ -1286,24 +1274,24 @@ static void blkvsc_request(struct request_queue *queue)
{
struct block_device_context *blkdev = NULL;
struct request *req;
int ret=0;
int ret = 0;
DPRINT_DBG(BLKVSC_DRV, "- enter \n");
while ((req = blk_peek_request(queue)) != NULL)
{
while ((req = blk_peek_request(queue)) != NULL) {
DPRINT_DBG(BLKVSC_DRV, "- req %p\n", req);
blkdev = req->rq_disk->private_data;
if (blkdev->shutting_down || !blk_fs_request(req) || blkdev->media_not_present) {
if (blkdev->shutting_down || !blk_fs_request(req) ||
blkdev->media_not_present) {
__blk_end_request_cur(req, 0);
continue;
}
ret = blkvsc_do_pending_reqs(blkdev);
if (ret != 0)
{
DPRINT_DBG(BLKVSC_DRV, "- stop queue - pending_list not empty\n");
if (ret != 0) {
DPRINT_DBG(BLKVSC_DRV,
"- stop queue - pending_list not empty\n");
blk_stop_queue(queue);
break;
}
......@@ -1311,14 +1299,11 @@ static void blkvsc_request(struct request_queue *queue)
blk_start_request(req);
ret = blkvsc_do_request(blkdev, req);
if (ret > 0)
{
if (ret > 0) {
DPRINT_DBG(BLKVSC_DRV, "- stop queue - no room\n");
blk_stop_queue(queue);
break;
}
else if (ret < 0)
{
} else if (ret < 0) {
DPRINT_DBG(BLKVSC_DRV, "- stop queue - no mem\n");
blk_requeue_request(queue, req);
blk_stop_queue(queue);
......@@ -1331,12 +1316,12 @@ static int blkvsc_open(struct block_device *bdev, fmode_t mode)
{
struct block_device_context *blkdev = bdev->bd_disk->private_data;
DPRINT_DBG(BLKVSC_DRV, "- users %d disk %s\n", blkdev->users, blkdev->gd->disk_name);
DPRINT_DBG(BLKVSC_DRV, "- users %d disk %s\n", blkdev->users,
blkdev->gd->disk_name);
spin_lock(&blkdev->lock);
if (!blkdev->users && blkdev->device_type == DVD_TYPE)
{
if (!blkdev->users && blkdev->device_type == DVD_TYPE) {
spin_unlock(&blkdev->lock);
check_disk_change(bdev);
spin_lock(&blkdev->lock);
......@@ -1352,11 +1337,11 @@ static int blkvsc_release(struct gendisk *disk, fmode_t mode)
{
struct block_device_context *blkdev = disk->private_data;
DPRINT_DBG(BLKVSC_DRV, "- users %d disk %s\n", blkdev->users, blkdev->gd->disk_name);
DPRINT_DBG(BLKVSC_DRV, "- users %d disk %s\n", blkdev->users,
blkdev->gd->disk_name);
spin_lock(&blkdev->lock);
if (blkdev->users == 1)
{
if (blkdev->users == 1) {
spin_unlock(&blkdev->lock);
blkvsc_do_flush(blkdev);
spin_lock(&blkdev->lock);
......@@ -1371,7 +1356,6 @@ static int blkvsc_release(struct gendisk *disk, fmode_t mode)
static int blkvsc_media_changed(struct gendisk *gd)
{
DPRINT_DBG(BLKVSC_DRV, "- enter\n");
return 1;
}
......@@ -1381,10 +1365,10 @@ static int blkvsc_revalidate_disk(struct gendisk *gd)
DPRINT_DBG(BLKVSC_DRV, "- enter\n");
if (blkdev->device_type == DVD_TYPE)
{
if (blkdev->device_type == DVD_TYPE) {
blkvsc_do_read_capacity(blkdev);
set_capacity(blkdev->gd, blkdev->capacity * (blkdev->sector_size/512));
set_capacity(blkdev->gd, blkdev->capacity *
(blkdev->sector_size/512));
blk_queue_logical_block_size(gd->queue, blkdev->sector_size);
}
return 0;
......@@ -1393,47 +1377,52 @@ static int blkvsc_revalidate_disk(struct gendisk *gd)
static int blkvsc_getgeo(struct block_device *bd, struct hd_geometry *hg)
{
sector_t total_sectors = get_capacity(bd->bd_disk);
sector_t cylinder_times_heads=0;
sector_t temp=0;
sector_t cylinder_times_heads = 0;
sector_t temp = 0;
int sectors_per_track=0;
int heads=0;
int cylinders=0;
int rem=0;
int sectors_per_track = 0;
int heads = 0;
int cylinders = 0;
int rem = 0;
if (total_sectors > (65535 * 16 * 255)) {
if (total_sectors > (65535 * 16 * 255))
total_sectors = (65535 * 16 * 255);
}
if (total_sectors >= (65535 * 16 * 63)) {
sectors_per_track = 255;
heads = 16;
cylinder_times_heads = total_sectors;
rem = sector_div(cylinder_times_heads, sectors_per_track); /* sector_div stores the quotient in cylinder_times_heads */
}
else
{
/* sector_div stores the quotient in cylinder_times_heads */
rem = sector_div(cylinder_times_heads, sectors_per_track);
} else {
sectors_per_track = 17;
cylinder_times_heads = total_sectors;
rem = sector_div(cylinder_times_heads, sectors_per_track); /* sector_div stores the quotient in cylinder_times_heads */
/* sector_div stores the quotient in cylinder_times_heads */
rem = sector_div(cylinder_times_heads, sectors_per_track);
temp = cylinder_times_heads + 1023;
rem = sector_div(temp, 1024); /* sector_div stores the quotient in temp */
/* sector_div stores the quotient in temp */
rem = sector_div(temp, 1024);
heads = temp;
if (heads < 4) {
if (heads < 4)
heads = 4;
}
if (cylinder_times_heads >= (heads * 1024) || (heads > 16)) {
sectors_per_track = 31;
heads = 16;
cylinder_times_heads = total_sectors;
rem = sector_div(cylinder_times_heads, sectors_per_track); /* sector_div stores the quotient in cylinder_times_heads */
/*
* sector_div stores the quotient in
* cylinder_times_heads
*/
rem = sector_div(cylinder_times_heads,
sectors_per_track);
}
if (cylinder_times_heads >= (heads * 1024)) {
......@@ -1441,19 +1430,26 @@ static int blkvsc_getgeo(struct block_device *bd, struct hd_geometry *hg)
heads = 16;
cylinder_times_heads = total_sectors;
rem = sector_div(cylinder_times_heads, sectors_per_track); /* sector_div stores the quotient in cylinder_times_heads */
/*
* sector_div stores the quotient in
* cylinder_times_heads
*/
rem = sector_div(cylinder_times_heads,
sectors_per_track);
}
}
temp = cylinder_times_heads;
rem = sector_div(temp, heads); /* sector_div stores the quotient in temp */
/* sector_div stores the quotient in temp */
rem = sector_div(temp, heads);
cylinders = temp;
hg->heads = heads;
hg->sectors = sectors_per_track;
hg->cylinders = cylinders;
DPRINT_INFO(BLKVSC_DRV, "CHS (%d, %d, %d)", cylinders, heads, sectors_per_track);
DPRINT_INFO(BLKVSC_DRV, "CHS (%d, %d, %d)", cylinders, heads,
sectors_per_track);
return 0;
}
......@@ -1462,21 +1458,21 @@ static int blkvsc_ioctl(struct block_device *bd, fmode_t mode,
unsigned cmd, unsigned long argument)
{
/* struct block_device_context *blkdev = bd->bd_disk->private_data; */
int ret=0;
int ret;
switch (cmd)
{
/* TODO: I think there is certain format for HDIO_GET_IDENTITY rather than just */
/* a GUID. Commented it out for now. */
/*case HDIO_GET_IDENTITY:
switch (cmd) {
/*
* TODO: I think there is certain format for HDIO_GET_IDENTITY rather
* than just a GUID. Commented it out for now.
*/
#if 0
case HDIO_GET_IDENTITY:
DPRINT_INFO(BLKVSC_DRV, "HDIO_GET_IDENTITY\n");
if (copy_to_user((void __user *)arg, blkdev->device_id, blkdev->device_id_len))
{
if (copy_to_user((void __user *)arg, blkdev->device_id,
blkdev->device_id_len))
ret = -EFAULT;
}
break;*/
break;
#endif
default:
ret = -EINVAL;
break;
......@@ -1485,9 +1481,6 @@ static int blkvsc_ioctl(struct block_device *bd, fmode_t mode,
return ret;
}
MODULE_LICENSE("GPL");
static int __init blkvsc_init(void)
{
int ret;
......@@ -1508,15 +1501,11 @@ static int __init blkvsc_init(void)
static void __exit blkvsc_exit(void)
{
DPRINT_ENTER(BLKVSC_DRV);
blkvsc_drv_exit();
DPRINT_ENTER(BLKVSC_DRV);
}
MODULE_LICENSE("GPL");
module_param(blkvsc_ringbuffer_size, int, S_IRUGO);
module_init(blkvsc_init);
module_exit(blkvsc_exit);
/* eof */
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