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Commit e73aec82 authored by Martin K. Petersen's avatar Martin K. Petersen Committed by James Bottomley
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[SCSI] sd: make printing use a common prefix 

Make SCSI disk printing more consistent:

 - Define sd_printk(), sd_print_sense_hdr() and sd_print_result()

 - Move relevant header bits into sd.h

 - Remove all the legacy disk_name passing and use scsi_disk pointers
   where possible

 - Switch printk() lines to the new sd_ functions so that output is
   consistent
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@SteelEye.com>
parent a4d04a4c
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Showing with 165 additions and 158 deletions
drivers/scsi/sd.c
View file @ e73aec82
......@@ -58,16 +58,10 @@
#include <scsi/scsi_host.h>
#include <scsi/scsi_ioctl.h>
#include <scsi/scsicam.h>
#include <scsi/sd.h>
#include "scsi_logging.h"
/*
* More than enough for everybody ;) The huge number of majors
* is a leftover from 16bit dev_t days, we don't really need that
* much numberspace.
*/
#define SD_MAJORS 16
MODULE_AUTHOR("Eric Youngdale");
MODULE_DESCRIPTION("SCSI disk (sd) driver");
MODULE_LICENSE("GPL");
......@@ -89,45 +83,6 @@ MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK13_MAJOR);
MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK14_MAJOR);
MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR);
/*
* This is limited by the naming scheme enforced in sd_probe,
* add another character to it if you really need more disks.
*/
#define SD_MAX_DISKS (((26 * 26) + 26 + 1) * 26)
/*
* Time out in seconds for disks and Magneto-opticals (which are slower).
*/
#define SD_TIMEOUT (30 * HZ)
#define SD_MOD_TIMEOUT (75 * HZ)
/*
* Number of allowed retries
*/
#define SD_MAX_RETRIES 5
#define SD_PASSTHROUGH_RETRIES 1
/*
* Size of the initial data buffer for mode and read capacity data
*/
#define SD_BUF_SIZE 512
struct scsi_disk {
struct scsi_driver *driver; /* always &sd_template */
struct scsi_device *device;
struct class_device cdev;
struct gendisk *disk;
unsigned int openers; /* protected by BKL for now, yuck */
sector_t capacity; /* size in 512-byte sectors */
u32 index;
u8 media_present;
u8 write_prot;
unsigned WCE : 1; /* state of disk WCE bit */
unsigned RCD : 1; /* state of disk RCD bit, unused */
unsigned DPOFUA : 1; /* state of disk DPOFUA bit */
};
#define to_scsi_disk(obj) container_of(obj,struct scsi_disk,cdev)
static DEFINE_IDR(sd_index_idr);
static DEFINE_SPINLOCK(sd_index_lock);
......@@ -136,20 +91,6 @@ static DEFINE_SPINLOCK(sd_index_lock);
* object after last put) */
static DEFINE_MUTEX(sd_ref_mutex);
static int sd_revalidate_disk(struct gendisk *disk);
static void sd_rw_intr(struct scsi_cmnd * SCpnt);
static int sd_probe(struct device *);
static int sd_remove(struct device *);
static void sd_shutdown(struct device *dev);
static void sd_rescan(struct device *);
static int sd_init_command(struct scsi_cmnd *);
static int sd_issue_flush(struct device *, sector_t *);
static void sd_prepare_flush(request_queue_t *, struct request *);
static void sd_read_capacity(struct scsi_disk *sdkp, char *diskname,
unsigned char *buffer);
static void scsi_disk_release(struct class_device *cdev);
static const char *sd_cache_types[] = {
"write through", "none", "write back",
"write back, no read (daft)"
......@@ -199,7 +140,7 @@ static ssize_t sd_store_cache_type(struct class_device *cdev, const char *buf,
if (scsi_mode_select(sdp, 1, sp, 8, buffer_data, len, SD_TIMEOUT,
SD_MAX_RETRIES, &data, &sshdr)) {
if (scsi_sense_valid(&sshdr))
scsi_print_sense_hdr(sdkp->disk->disk_name, &sshdr);
sd_print_sense_hdr(sdkp, &sshdr);
return -EINVAL;
}
sd_revalidate_disk(sdkp->disk);
......@@ -407,7 +348,8 @@ static int sd_init_command(struct scsi_cmnd * SCpnt)
*/
if (sdp->sector_size == 1024) {
if ((block & 1) || (rq->nr_sectors & 1)) {
printk(KERN_ERR "sd: Bad block number requested");
scmd_printk(KERN_ERR, SCpnt,
"Bad block number requested\n");
return 0;
} else {
block = block >> 1;
......@@ -416,7 +358,8 @@ static int sd_init_command(struct scsi_cmnd * SCpnt)
}
if (sdp->sector_size == 2048) {
if ((block & 3) || (rq->nr_sectors & 3)) {
printk(KERN_ERR "sd: Bad block number requested");
scmd_printk(KERN_ERR, SCpnt,
"Bad block number requested\n");
return 0;
} else {
block = block >> 2;
......@@ -425,7 +368,8 @@ static int sd_init_command(struct scsi_cmnd * SCpnt)
}
if (sdp->sector_size == 4096) {
if ((block & 7) || (rq->nr_sectors & 7)) {
printk(KERN_ERR "sd: Bad block number requested");
scmd_printk(KERN_ERR, SCpnt,
"Bad block number requested\n");
return 0;
} else {
block = block >> 3;
......@@ -442,7 +386,7 @@ static int sd_init_command(struct scsi_cmnd * SCpnt)
SCpnt->cmnd[0] = READ_6;
SCpnt->sc_data_direction = DMA_FROM_DEVICE;
} else {
printk(KERN_ERR "sd: Unknown command %x\n", rq->cmd_flags);
scmd_printk(KERN_ERR, SCpnt, "Unknown command %x\n", rq->cmd_flags);
return 0;
}
......@@ -490,7 +434,8 @@ static int sd_init_command(struct scsi_cmnd * SCpnt)
* during operation and thus turned off
* use_10_for_rw.
*/
printk(KERN_ERR "sd: FUA write on READ/WRITE(6) drive\n");
scmd_printk(KERN_ERR, SCpnt,
"FUA write on READ/WRITE(6) drive\n");
return 0;
}
......@@ -786,9 +731,10 @@ static int sd_media_changed(struct gendisk *disk)
return 1;
}
static int sd_sync_cache(struct scsi_device *sdp)
static int sd_sync_cache(struct scsi_disk *sdkp)
{
int retries, res;
struct scsi_device *sdp = sdkp->device;
struct scsi_sense_hdr sshdr;
if (!scsi_device_online(sdp))
......@@ -809,12 +755,10 @@ static int sd_sync_cache(struct scsi_device *sdp)
break;
}
if (res) { printk(KERN_WARNING "FAILED\n status = %x, message = %02x, "
"host = %d, driver = %02x\n ",
status_byte(res), msg_byte(res),
host_byte(res), driver_byte(res));
if (driver_byte(res) & DRIVER_SENSE)
scsi_print_sense_hdr("sd", &sshdr);
if (res) {
sd_print_result(sdkp, res);
if (driver_byte(res) & DRIVER_SENSE)
sd_print_sense_hdr(sdkp, &sshdr);
}
return res;
......@@ -823,14 +767,13 @@ static int sd_sync_cache(struct scsi_device *sdp)
static int sd_issue_flush(struct device *dev, sector_t *error_sector)
{
int ret = 0;
struct scsi_device *sdp = to_scsi_device(dev);
struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev);
if (!sdkp)
return -ENODEV;
if (sdkp->WCE)
ret = sd_sync_cache(sdp);
ret = sd_sync_cache(sdkp);
scsi_disk_put(sdkp);
return ret;
}
......@@ -1025,7 +968,7 @@ static int media_not_present(struct scsi_disk *sdkp,
* spinup disk - called only in sd_revalidate_disk()
*/
static void
sd_spinup_disk(struct scsi_disk *sdkp, char *diskname)
sd_spinup_disk(struct scsi_disk *sdkp)
{
unsigned char cmd[10];
unsigned long spintime_expire = 0;
......@@ -1069,9 +1012,10 @@ sd_spinup_disk(struct scsi_disk *sdkp, char *diskname)
if ((driver_byte(the_result) & DRIVER_SENSE) == 0) {
/* no sense, TUR either succeeded or failed
* with a status error */
if(!spintime && !scsi_status_is_good(the_result))
printk(KERN_NOTICE "%s: Unit Not Ready, "
"error = 0x%x\n", diskname, the_result);
if(!spintime && !scsi_status_is_good(the_result)) {
sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n");
sd_print_result(sdkp, the_result);
}
break;
}
......@@ -1096,8 +1040,7 @@ sd_spinup_disk(struct scsi_disk *sdkp, char *diskname)
*/
} else if (sense_valid && sshdr.sense_key == NOT_READY) {
if (!spintime) {
printk(KERN_NOTICE "%s: Spinning up disk...",
diskname);
sd_printk(KERN_NOTICE, sdkp, "Spinning up disk...");
cmd[0] = START_STOP;
cmd[1] = 1; /* Return immediately */
memset((void *) &cmd[2], 0, 8);
......@@ -1130,9 +1073,8 @@ sd_spinup_disk(struct scsi_disk *sdkp, char *diskname)
/* we don't understand the sense code, so it's
* probably pointless to loop */
if(!spintime) {
printk(KERN_NOTICE "%s: Unit Not Ready, "
"sense:\n", diskname);
scsi_print_sense_hdr("", &sshdr);
sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n");
sd_print_sense_hdr(sdkp, &sshdr);
}
break;
}
......@@ -1151,8 +1093,7 @@ sd_spinup_disk(struct scsi_disk *sdkp, char *diskname)
* read disk capacity
*/
static void
sd_read_capacity(struct scsi_disk *sdkp, char *diskname,
unsigned char *buffer)
sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer)
{
unsigned char cmd[16];
int the_result, retries;
......@@ -1191,18 +1132,12 @@ sd_read_capacity(struct scsi_disk *sdkp, char *diskname,
} while (the_result && retries);
if (the_result && !longrc) {
printk(KERN_NOTICE "%s : READ CAPACITY failed.\n"
"%s : status=%x, message=%02x, host=%d, driver=%02x \n",
diskname, diskname,
status_byte(the_result),
msg_byte(the_result),
host_byte(the_result),
driver_byte(the_result));
sd_printk(KERN_NOTICE, sdkp, "READ CAPACITY failed\n");
sd_print_result(sdkp, the_result);
if (driver_byte(the_result) & DRIVER_SENSE)
scsi_print_sense_hdr("sd", &sshdr);
sd_print_sense_hdr(sdkp, &sshdr);
else
printk("%s : sense not available. \n", diskname);
sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n");
/* Set dirty bit for removable devices if not ready -
* sometimes drives will not report this properly. */
......@@ -1218,16 +1153,10 @@ sd_read_capacity(struct scsi_disk *sdkp, char *diskname,
return;
} else if (the_result && longrc) {
/* READ CAPACITY(16) has been failed */
printk(KERN_NOTICE "%s : READ CAPACITY(16) failed.\n"
"%s : status=%x, message=%02x, host=%d, driver=%02x \n",
diskname, diskname,
status_byte(the_result),
msg_byte(the_result),
host_byte(the_result),
driver_byte(the_result));
printk(KERN_NOTICE "%s : use 0xffffffff as device size\n",
diskname);
sd_printk(KERN_NOTICE, sdkp, "READ CAPACITY(16) failed\n");
sd_print_result(sdkp, the_result);
sd_printk(KERN_NOTICE, sdkp, "Use 0xffffffff as device size\n");
sdkp->capacity = 1 + (sector_t) 0xffffffff;
goto got_data;
}
......@@ -1238,14 +1167,14 @@ sd_read_capacity(struct scsi_disk *sdkp, char *diskname,
if (buffer[0] == 0xff && buffer[1] == 0xff &&
buffer[2] == 0xff && buffer[3] == 0xff) {
if(sizeof(sdkp->capacity) > 4) {
printk(KERN_NOTICE "%s : very big device. try to use"
" READ CAPACITY(16).\n", diskname);
sd_printk(KERN_NOTICE, sdkp, "Very big device. "
"Trying to use READ CAPACITY(16).\n");
longrc = 1;
goto repeat;
}
printk(KERN_ERR "%s: too big for this kernel. Use a "
"kernel compiled with support for large block "
"devices.\n", diskname);
sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use "
"a kernel compiled with support for large "
"block devices.\n");
sdkp->capacity = 0;
goto got_data;
}
......@@ -1284,8 +1213,8 @@ sd_read_capacity(struct scsi_disk *sdkp, char *diskname,
got_data:
if (sector_size == 0) {
sector_size = 512;
printk(KERN_NOTICE "%s : sector size 0 reported, "
"assuming 512.\n", diskname);
sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, "
"assuming 512.\n");
}
if (sector_size != 512 &&
......@@ -1293,8 +1222,8 @@ sd_read_capacity(struct scsi_disk *sdkp, char *diskname,
sector_size != 2048 &&
sector_size != 4096 &&
sector_size != 256) {
printk(KERN_NOTICE "%s : unsupported sector size "
"%d.\n", diskname, sector_size);
sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n",
sector_size);
/*
* The user might want to re-format the drive with
* a supported sectorsize. Once this happens, it
......@@ -1327,10 +1256,10 @@ sd_read_capacity(struct scsi_disk *sdkp, char *diskname,
mb -= sz - 974;
sector_div(mb, 1950);
printk(KERN_NOTICE "SCSI device %s: "
"%llu %d-byte hdwr sectors (%llu MB)\n",
diskname, (unsigned long long)sdkp->capacity,
hard_sector, (unsigned long long)mb);
sd_printk(KERN_NOTICE, sdkp,
"%llu %d-byte hardware sectors (%llu MB)\n",
(unsigned long long)sdkp->capacity,
hard_sector, (unsigned long long)mb);
}
/* Rescale capacity to 512-byte units */
......@@ -1362,8 +1291,7 @@ sd_do_mode_sense(struct scsi_device *sdp, int dbd, int modepage,
* called with buffer of length SD_BUF_SIZE
*/
static void
sd_read_write_protect_flag(struct scsi_disk *sdkp, char *diskname,
unsigned char *buffer)
sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer)
{
int res;
struct scsi_device *sdp = sdkp->device;
......@@ -1371,7 +1299,7 @@ sd_read_write_protect_flag(struct scsi_disk *sdkp, char *diskname,
set_disk_ro(sdkp->disk, 0);
if (sdp->skip_ms_page_3f) {
printk(KERN_NOTICE "%s: assuming Write Enabled\n", diskname);
sd_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n");
return;
}
......@@ -1403,15 +1331,16 @@ sd_read_write_protect_flag(struct scsi_disk *sdkp, char *diskname,
}
if (!scsi_status_is_good(res)) {
printk(KERN_WARNING
"%s: test WP failed, assume Write Enabled\n", diskname);
sd_printk(KERN_WARNING, sdkp,
"Test WP failed, assume Write Enabled\n");
} else {
sdkp->write_prot = ((data.device_specific & 0x80) != 0);
set_disk_ro(sdkp->disk, sdkp->write_prot);
printk(KERN_NOTICE "%s: Write Protect is %s\n", diskname,
sdkp->write_prot ? "on" : "off");
printk(KERN_DEBUG "%s: Mode Sense: %02x %02x %02x %02x\n",
diskname, buffer[0], buffer[1], buffer[2], buffer[3]);
sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n",
sdkp->write_prot ? "on" : "off");
sd_printk(KERN_DEBUG, sdkp,
"Mode Sense: %02x %02x %02x %02x\n",
buffer[0], buffer[1], buffer[2], buffer[3]);
}
}
......@@ -1420,8 +1349,7 @@ sd_read_write_protect_flag(struct scsi_disk *sdkp, char *diskname,
* called with buffer of length SD_BUF_SIZE
*/
static void
sd_read_cache_type(struct scsi_disk *sdkp, char *diskname,
unsigned char *buffer)
sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer)
{
int len = 0, res;
struct scsi_device *sdp = sdkp->device;
......@@ -1450,8 +1378,7 @@ sd_read_cache_type(struct scsi_disk *sdkp, char *diskname,
if (!data.header_length) {
modepage = 6;
printk(KERN_ERR "%s: missing header in MODE_SENSE response\n",
diskname);
sd_printk(KERN_ERR, sdkp, "Missing header in MODE_SENSE response\n");
}
/* that went OK, now ask for the proper length */
......@@ -1478,13 +1405,12 @@ sd_read_cache_type(struct scsi_disk *sdkp, char *diskname,
int offset = data.header_length + data.block_descriptor_length;
if (offset >= SD_BUF_SIZE - 2) {
printk(KERN_ERR "%s: malformed MODE SENSE response",
diskname);
sd_printk(KERN_ERR, sdkp, "Malformed MODE SENSE response\n");
goto defaults;
}
if ((buffer[offset] & 0x3f) != modepage) {
printk(KERN_ERR "%s: got wrong page\n", diskname);
sd_printk(KERN_ERR, sdkp, "Got wrong page\n");
goto defaults;
}
......@@ -1498,14 +1424,13 @@ sd_read_cache_type(struct scsi_disk *sdkp, char *diskname,
sdkp->DPOFUA = (data.device_specific & 0x10) != 0;
if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw) {
printk(KERN_NOTICE "SCSI device %s: uses "
"READ/WRITE(6), disabling FUA\n", diskname);
sd_printk(KERN_NOTICE, sdkp,
"Uses READ/WRITE(6), disabling FUA\n");
sdkp->DPOFUA = 0;
}
printk(KERN_NOTICE "SCSI device %s: "
"write cache: %s, read cache: %s, %s\n",
diskname,
sd_printk(KERN_NOTICE, sdkp,
"Write cache: %s, read cache: %s, %s\n",
sdkp->WCE ? "enabled" : "disabled",
sdkp->RCD ? "disabled" : "enabled",
sdkp->DPOFUA ? "supports DPO and FUA"
......@@ -1518,15 +1443,13 @@ sd_read_cache_type(struct scsi_disk *sdkp, char *diskname,
if (scsi_sense_valid(&sshdr) &&
sshdr.sense_key == ILLEGAL_REQUEST &&
sshdr.asc == 0x24 && sshdr.ascq == 0x0)
printk(KERN_NOTICE "%s: cache data unavailable\n",
diskname); /* Invalid field in CDB */
/* Invalid field in CDB */
sd_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n");
else
printk(KERN_ERR "%s: asking for cache data failed\n",
diskname);
sd_printk(KERN_ERR, sdkp, "Asking for cache data failed\n");
defaults:
printk(KERN_ERR "%s: assuming drive cache: write through\n",
diskname);
sd_printk(KERN_ERR, sdkp, "Assuming drive cache: write through\n");
sdkp->WCE = 0;
sdkp->RCD = 0;
sdkp->DPOFUA = 0;
......@@ -1555,8 +1478,8 @@ static int sd_revalidate_disk(struct gendisk *disk)
buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL | __GFP_DMA);
if (!buffer) {
printk(KERN_WARNING "(sd_revalidate_disk:) Memory allocation "
"failure.\n");
sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory "
"allocation failure.\n");
goto out;
}
......@@ -1568,16 +1491,16 @@ static int sd_revalidate_disk(struct gendisk *disk)
sdkp->WCE = 0;
sdkp->RCD = 0;
sd_spinup_disk(sdkp, disk->disk_name);
sd_spinup_disk(sdkp);
/*
* Without media there is no reason to ask; moreover, some devices
* react badly if we do.
*/
if (sdkp->media_present) {
sd_read_capacity(sdkp, disk->disk_name, buffer);
sd_read_write_protect_flag(sdkp, disk->disk_name, buffer);
sd_read_cache_type(sdkp, disk->disk_name, buffer);
sd_read_capacity(sdkp, buffer);
sd_read_write_protect_flag(sdkp, buffer);
sd_read_cache_type(sdkp, buffer);
}
/*
......@@ -1709,8 +1632,8 @@ static int sd_probe(struct device *dev)
dev_set_drvdata(dev, sdkp);
add_disk(gd);
sdev_printk(KERN_NOTICE, sdp, "Attached scsi %sdisk %s\n",
sdp->removable ? "removable " : "", gd->disk_name);
sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n",
sdp->removable ? "removable " : "");
return 0;
......@@ -1781,16 +1704,14 @@ static void scsi_disk_release(struct class_device *cdev)
*/
static void sd_shutdown(struct device *dev)
{
struct scsi_device *sdp = to_scsi_device(dev);
struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev);
if (!sdkp)
return; /* this can happen */
if (sdkp->WCE) {
printk(KERN_NOTICE "Synchronizing SCSI cache for disk %s: \n",
sdkp->disk->disk_name);
sd_sync_cache(sdp);
sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n");
sd_sync_cache(sdkp);
}
scsi_disk_put(sdkp);
}
......@@ -1852,3 +1773,19 @@ static void __exit exit_sd(void)
module_init(init_sd);
module_exit(exit_sd);
static void sd_print_sense_hdr(struct scsi_disk *sdkp,
struct scsi_sense_hdr *sshdr)
{
sd_printk(KERN_INFO, sdkp, "");
scsi_show_sense_hdr(sshdr);
sd_printk(KERN_INFO, sdkp, "");
scsi_show_extd_sense(sshdr->asc, sshdr->ascq);
}
static void sd_print_result(struct scsi_disk *sdkp, int result)
{
sd_printk(KERN_INFO, sdkp, "");
scsi_show_result(result);
}
include/scsi/sd.h 0 → 100644
View file @ e73aec82
#ifndef _SCSI_DISK_H
#define _SCSI_DISK_H
/*
* More than enough for everybody ;) The huge number of majors
* is a leftover from 16bit dev_t days, we don't really need that
* much numberspace.
*/
#define SD_MAJORS 16
/*
* This is limited by the naming scheme enforced in sd_probe,
* add another character to it if you really need more disks.
*/
#define SD_MAX_DISKS (((26 * 26) + 26 + 1) * 26)
/*
* Time out in seconds for disks and Magneto-opticals (which are slower).
*/
#define SD_TIMEOUT (30 * HZ)
#define SD_MOD_TIMEOUT (75 * HZ)
/*
* Number of allowed retries
*/
#define SD_MAX_RETRIES 5
#define SD_PASSTHROUGH_RETRIES 1
/*
* Size of the initial data buffer for mode and read capacity data
*/
#define SD_BUF_SIZE 512
struct scsi_disk {
struct scsi_driver *driver; /* always &sd_template */
struct scsi_device *device;
struct class_device cdev;
struct gendisk *disk;
unsigned int openers; /* protected by BKL for now, yuck */
sector_t capacity; /* size in 512-byte sectors */
u32 index;
u8 media_present;
u8 write_prot;
unsigned WCE : 1; /* state of disk WCE bit */
unsigned RCD : 1; /* state of disk RCD bit, unused */
unsigned DPOFUA : 1; /* state of disk DPOFUA bit */
};
#define to_scsi_disk(obj) container_of(obj,struct scsi_disk,cdev)
static int sd_revalidate_disk(struct gendisk *disk);
static void sd_rw_intr(struct scsi_cmnd * SCpnt);
static int sd_probe(struct device *);
static int sd_remove(struct device *);
static void sd_shutdown(struct device *dev);
static void sd_rescan(struct device *);
static int sd_init_command(struct scsi_cmnd *);
static int sd_issue_flush(struct device *, sector_t *);
static void sd_prepare_flush(request_queue_t *, struct request *);
static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer);
static void scsi_disk_release(struct class_device *cdev);
static void sd_print_sense_hdr(struct scsi_disk *, struct scsi_sense_hdr *);
static void sd_print_result(struct scsi_disk *, int);
#define sd_printk(prefix, sdsk, fmt, a...) \
(sdsk)->disk ? \
sdev_printk(prefix, (sdsk)->device, "[%s] " fmt, \
(sdsk)->disk->disk_name, ##a) : \
sdev_printk(prefix, (sdsk)->device, fmt, ##a)
#endif /* _SCSI_DISK_H */
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