/*
- *
* Copyright (c) 2009, Microsoft Corporation.
*
* This program is free software; you can redistribute it and/or modify it
*
* Authors:
* Hank Janssen <hjanssen@microsoft.com>
- *
*/
-
#include <linux/init.h>
#include <linux/module.h>
#include <linux/device.h>
#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,
* represented by 1 or more struct blkvsc_request
*/
struct blkvsc_request_group {
- int outstanding;
- int status;
-
- struct list_head blkvsc_req_list; /* list of blkvsc_requests */
+ 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;
+
+ /* block_device_context.pending_list */
+ struct list_head pend_entry;
+
+ /* This may be null if we generate a request internally */
+ struct request *req;
- struct list_head pend_entry; /* block_device_context.pending_list */
+ struct block_device_context *dev;
- 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;
+ wait_queue_head_t wevent;
int cond;
- int write;
- sector_t sector_start;
- unsigned long sector_count;
+ int write;
+ sector_t sector_start;
+ unsigned long sector_count;
unsigned char sense_buffer[SCSI_SENSE_BUFFERSIZE];
unsigned char cmd_len;
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 */
- struct kmem_cache *request_pool;
- spinlock_t lock;
- struct gendisk *gd;
+ /* point back to our device context */
+ struct device_context *device_ctx;
+ struct kmem_cache *request_pool;
+ spinlock_t lock;
+ struct gendisk *gd;
enum blkvsc_device_type device_type;
- struct list_head pending_list;
-
- unsigned char device_id[64];
- unsigned int device_id_len;
- int num_outstanding_reqs;
- int shutting_down;
- int media_not_present;
- unsigned int sector_size;
- sector_t capacity;
- unsigned int port;
- unsigned char path;
- unsigned char target;
- int users;
+ struct list_head pending_list;
+
+ unsigned char device_id[64];
+ unsigned int device_id_len;
+ int num_outstanding_reqs;
+ int shutting_down;
+ int media_not_present;
+ unsigned int sector_size;
+ sector_t capacity;
+ unsigned int port;
+ unsigned char path;
+ unsigned char target;
+ int users;
};
/* Per driver */
struct blkvsc_driver_context {
/* !! These must be the first 2 fields !! */
- struct driver_context drv_ctx;
+ /* FIXME this is a bug! */
+ struct driver_context drv_ctx;
struct storvsc_driver_object drv_obj;
};
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);
/* 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,
.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);
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;
return ret;
}
-
static int blkvsc_drv_exit_cb(struct device *dev, void *data)
{
struct device **curr = (struct device **)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 */
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;
}
/* 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,
- SLAB_HWCACHE_ALIGN, NULL);
- if (!blkdev->request_pool)
- {
+ sizeof(struct blkvsc_request) +
+ storvsc_drv_obj->RequestExtSize, 0,
+ SLAB_HWCACHE_ALIGN, NULL);
+ if (!blkdev->request_pool) {
ret = -ENOMEM;
goto Cleanup;
}
/* 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;
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;
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);
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);
}
/* 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;
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;
}
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);
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);
}
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");
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);
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);
/* 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;
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;
}
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);
/* 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;
}
/* 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;
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;
}
* 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);
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;
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;
}
* 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);
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 */
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);
}
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",
- (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,
- blkvsc_req->request.DataBuffer.PfnArray[i]);
- }*/
+ 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);
+#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;
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;
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);
-
- /* 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 */
- {
- /* submit the prev one */
- 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 */
- blkvsc_req = kmem_cache_alloc(blkdev->request_pool, GFP_ATOMIC);
- if (!blkvsc_req)
- {
- /* free up everything */
- 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);
+ 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 */
+ /* 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) {
+ 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);
}
- kmem_cache_free(blkdev->request_pool, group);
- return -ENOMEM;
- }
+ /*
+ * Create new blkvsc_req to represent
+ * the current bvec
+ */
+ blkvsc_req = kmem_cache_alloc(blkdev->request_pool, GFP_ATOMIC);
+ if (!blkvsc_req) {
+ /* free up everything */
+ 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);
+ }
+
+ kmem_cache_free(blkdev->request_pool, group);
+ 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;
- blkvsc_req->request.DataBuffer.Offset = bvec->bv_offset;
- blkvsc_req->request.DataBuffer.Length = 0;
+ blkvsc_req->dev = blkdev;
+ blkvsc_req->req = req;
+ blkvsc_req->request.DataBuffer.Offset = bvec->bv_offset;
+ blkvsc_req->request.DataBuffer.Length = 0;
- /* 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);
+ /* 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);
- start_sector += num_sectors;
- num_sectors = 0;
- databuf_idx = 0;
- }
+ start_sector += num_sectors;
+ num_sectors = 0;
+ databuf_idx = 0;
+ }
- /* Add the curr bvec/segment to the curr blkvsc_req */
- blkvsc_req->request.DataBuffer.PfnArray[databuf_idx] = page_to_pfn(bvec->bv_page);
- blkvsc_req->request.DataBuffer.Length += bvec->bv_len;
+ /* Add the curr bvec/segment to the curr blkvsc_req */
+ blkvsc_req->request.DataBuffer.PfnArray[databuf_idx] = page_to_pfn(bvec->bv_page);
+ blkvsc_req->request.DataBuffer.Length += bvec->bv_len;
- prev_bvec = bvec;
+ prev_bvec = bvec;
- databuf_idx++;
- num_sectors += bvec->bv_len >> 9;
+ databuf_idx++;
+ num_sectors += bvec->bv_len >> 9;
- } /* bio_for_each_segment */
+ } /* bio_for_each_segment */
- } /* rq_for_each_bio */
+ } /* 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);
}
}
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,
- blkvsc_req->sector_count,
- blkvsc_req->request.DataBuffer.Length,
- blkvsc_req->group->outstanding,
- blkdev->num_outstanding_reqs);
+ 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,
+ blkdev->num_outstanding_reqs);
spin_lock_irqsave(&blkdev->lock, flags);
* 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",
- comp_req,
- (unsigned long) comp_req->sector_start,
- comp_req->sector_count);
+ 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,
+ 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);
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",
- comp_req,
- (unsigned long) comp_req->sector_start,
- comp_req->sector_count);
+ 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);
if (comp_req == pend_req)
break;
list_del(&comp_req->req_entry);
- if (comp_req->req)
- {
- ret = __blk_end_request(
- comp_req->req,
- (!comp_req->request.Status ? 0 : -EIO),
- comp_req->sector_count * blkdev->sector_size);
- ASSERT(ret != 0);
+ if (comp_req->req) {
+ ret = __blk_end_request(comp_req->req,
+ (!comp_req->request.Status ? 0 : -EIO),
+ 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);
+ }
}
kmem_cache_free(blkdev->request_pool, pend_req);
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;
{
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;
}
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);
}
}
-static int blkvsc_open(struct block_device *bdev, fmode_t mode)
+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);
{
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);
static int blkvsc_media_changed(struct gendisk *gd)
{
DPRINT_DBG(BLKVSC_DRV, "- enter\n");
-
return 1;
}
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;
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)) {
- 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;
+ 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
- {
- sectors_per_track = 17;
+ /* 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) {
- heads = 4;
- }
+ if (heads < 4)
+ heads = 4;
+
- if (cylinder_times_heads >= (heads * 1024) || (heads > 16)) {
- sectors_per_track = 31;
- heads = 16;
+ 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)) {
- sectors_per_track = 63;
- heads = 16;
+ if (cylinder_times_heads >= (heads * 1024)) {
+ sectors_per_track = 63;
+ 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;
+ 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;
}
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;
return ret;
}
-
-MODULE_LICENSE("GPL");
-
static int __init blkvsc_init(void)
{
int ret;
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 */
projects / platform / kernel / linux-stable.git / commitdiff