sd.c
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上传日期:2013-02-24
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文件大小:39k
- /*
- * sd.c Copyright (C) 1992 Drew Eckhardt
- * Copyright (C) 1993, 1994, 1995, 1999 Eric Youngdale
- *
- * Linux scsi disk driver
- * Initial versions: Drew Eckhardt
- * Subsequent revisions: Eric Youngdale
- *
- * <drew@colorado.edu>
- *
- * Modified by Eric Youngdale ericy@andante.org to
- * add scatter-gather, multiple outstanding request, and other
- * enhancements.
- *
- * Modified by Eric Youngdale eric@andante.org to support loadable
- * low-level scsi drivers.
- *
- * Modified by Jirka Hanika geo@ff.cuni.cz to support more
- * scsi disks using eight major numbers.
- *
- * Modified by Richard Gooch rgooch@atnf.csiro.au to support devfs.
- *
- * Modified by Torben Mathiasen tmm@image.dk
- * Resource allocation fixes in sd_init and cleanups.
- *
- * Modified by Alex Davis <letmein@erols.com>
- * Fix problem where partition info not being read in sd_open.
- *
- * Modified by Alex Davis <letmein@erols.com>
- * Fix problem where removable media could be ejected after sd_open.
- */
- #include <linux/config.h>
- #include <linux/module.h>
- #include <linux/fs.h>
- #include <linux/kernel.h>
- #include <linux/sched.h>
- #include <linux/mm.h>
- #include <linux/string.h>
- #include <linux/hdreg.h>
- #include <linux/errno.h>
- #include <linux/interrupt.h>
- #include <linux/init.h>
- #include <linux/smp.h>
- #include <asm/uaccess.h>
- #include <asm/system.h>
- #include <asm/io.h>
- #define MAJOR_NR SCSI_DISK0_MAJOR
- #include <linux/blk.h>
- #include <linux/blkpg.h>
- #include "scsi.h"
- #include "hosts.h"
- #include "sd.h"
- #include <scsi/scsi_ioctl.h>
- #include "constants.h"
- #include <scsi/scsicam.h> /* must follow "hosts.h" */
- #include <linux/genhd.h>
- /*
- * static const char RCSid[] = "$Header:";
- */
- #define SD_MAJOR(i) (!(i) ? SCSI_DISK0_MAJOR : SCSI_DISK1_MAJOR-1+(i))
- #define SCSI_DISKS_PER_MAJOR 16
- #define SD_MAJOR_NUMBER(i) SD_MAJOR((i) >> 8)
- #define SD_MINOR_NUMBER(i) ((i) & 255)
- #define MKDEV_SD_PARTITION(i) MKDEV(SD_MAJOR_NUMBER(i), (i) & 255)
- #define MKDEV_SD(index) MKDEV_SD_PARTITION((index) << 4)
- #define N_USED_SCSI_DISKS (sd_template.dev_max + SCSI_DISKS_PER_MAJOR - 1)
- #define N_USED_SD_MAJORS (N_USED_SCSI_DISKS / SCSI_DISKS_PER_MAJOR)
- #define MAX_RETRIES 5
- /*
- * Time out in seconds for disks and Magneto-opticals (which are slower).
- */
- #define SD_TIMEOUT (30 * HZ)
- #define SD_MOD_TIMEOUT (75 * HZ)
- struct hd_struct *sd;
- static Scsi_Disk *rscsi_disks;
- static int *sd_sizes;
- static int *sd_blocksizes;
- static int *sd_hardsizes; /* Hardware sector size */
- static int *sd_max_sectors;
- static int check_scsidisk_media_change(kdev_t);
- static int fop_revalidate_scsidisk(kdev_t);
- static int sd_init_onedisk(int);
- static int sd_init(void);
- static void sd_finish(void);
- static int sd_attach(Scsi_Device *);
- static int sd_detect(Scsi_Device *);
- static void sd_detach(Scsi_Device *);
- static int sd_init_command(Scsi_Cmnd *);
- static struct Scsi_Device_Template sd_template = {
- name:"disk",
- tag:"sd",
- scsi_type:TYPE_DISK,
- major:SCSI_DISK0_MAJOR,
- /*
- * Secondary range of majors that this driver handles.
- */
- min_major:SCSI_DISK1_MAJOR,
- max_major:SCSI_DISK7_MAJOR,
- blk:1,
- detect:sd_detect,
- init:sd_init,
- finish:sd_finish,
- attach:sd_attach,
- detach:sd_detach,
- init_command:sd_init_command,
- };
- static void rw_intr(Scsi_Cmnd * SCpnt);
- #if defined(CONFIG_PPC)
- /*
- * Moved from arch/ppc/pmac_setup.c. This is where it really belongs.
- */
- kdev_t __init
- sd_find_target(void *host, int tgt)
- {
- Scsi_Disk *dp;
- int i;
- for (dp = rscsi_disks, i = 0; i < sd_template.dev_max; ++i, ++dp)
- if (dp->device != NULL && dp->device->host == host
- && dp->device->id == tgt)
- return MKDEV_SD(i);
- return 0;
- }
- #endif
- static int sd_ioctl(struct inode * inode, struct file * file, unsigned int cmd, unsigned long arg)
- {
- kdev_t dev = inode->i_rdev;
- struct Scsi_Host * host;
- Scsi_Device * SDev;
- int diskinfo[4];
-
- SDev = rscsi_disks[DEVICE_NR(dev)].device;
- if (!SDev)
- return -ENODEV;
- /*
- * If we are in the middle of error recovery, don't let anyone
- * else try and use this device. Also, if error recovery fails, it
- * may try and take the device offline, in which case all further
- * access to the device is prohibited.
- */
- if( !scsi_block_when_processing_errors(SDev) )
- {
- return -ENODEV;
- }
- switch (cmd)
- {
- case HDIO_GETGEO: /* Return BIOS disk parameters */
- {
- struct hd_geometry *loc = (struct hd_geometry *) arg;
- if(!loc)
- return -EINVAL;
- host = rscsi_disks[DEVICE_NR(dev)].device->host;
-
- /* default to most commonly used values */
-
- diskinfo[0] = 0x40;
- diskinfo[1] = 0x20;
- diskinfo[2] = rscsi_disks[DEVICE_NR(dev)].capacity >> 11;
-
- /* override with calculated, extended default, or driver values */
-
- if(host->hostt->bios_param != NULL)
- host->hostt->bios_param(&rscsi_disks[DEVICE_NR(dev)],
- dev,
- &diskinfo[0]);
- else scsicam_bios_param(&rscsi_disks[DEVICE_NR(dev)],
- dev, &diskinfo[0]);
- if (put_user(diskinfo[0], &loc->heads) ||
- put_user(diskinfo[1], &loc->sectors) ||
- put_user(diskinfo[2], &loc->cylinders) ||
- put_user(sd[SD_PARTITION(inode->i_rdev)].start_sect, &loc->start))
- return -EFAULT;
- return 0;
- }
- case HDIO_GETGEO_BIG:
- {
- struct hd_big_geometry *loc = (struct hd_big_geometry *) arg;
- if(!loc)
- return -EINVAL;
- host = rscsi_disks[DEVICE_NR(dev)].device->host;
- /* default to most commonly used values */
- diskinfo[0] = 0x40;
- diskinfo[1] = 0x20;
- diskinfo[2] = rscsi_disks[DEVICE_NR(dev)].capacity >> 11;
- /* override with calculated, extended default, or driver values */
- if(host->hostt->bios_param != NULL)
- host->hostt->bios_param(&rscsi_disks[DEVICE_NR(dev)],
- dev,
- &diskinfo[0]);
- else scsicam_bios_param(&rscsi_disks[DEVICE_NR(dev)],
- dev, &diskinfo[0]);
- if (put_user(diskinfo[0], &loc->heads) ||
- put_user(diskinfo[1], &loc->sectors) ||
- put_user(diskinfo[2], (unsigned int *) &loc->cylinders) ||
- put_user(sd[SD_PARTITION(inode->i_rdev)].start_sect, &loc->start))
- return -EFAULT;
- return 0;
- }
- case BLKGETSIZE:
- case BLKGETSIZE64:
- case BLKROSET:
- case BLKROGET:
- case BLKRASET:
- case BLKRAGET:
- case BLKFLSBUF:
- case BLKSSZGET:
- case BLKPG:
- case BLKELVGET:
- case BLKELVSET:
- case BLKBSZGET:
- case BLKBSZSET:
- return blk_ioctl(inode->i_rdev, cmd, arg);
- case BLKRRPART: /* Re-read partition tables */
- if (!capable(CAP_SYS_ADMIN))
- return -EACCES;
- return revalidate_scsidisk(dev, 1);
- default:
- return scsi_ioctl(rscsi_disks[DEVICE_NR(dev)].device , cmd, (void *) arg);
- }
- }
- static void sd_devname(unsigned int disknum, char *buffer)
- {
- if (disknum < 26)
- sprintf(buffer, "sd%c", 'a' + disknum);
- else {
- unsigned int min1;
- unsigned int min2;
- /*
- * For larger numbers of disks, we need to go to a new
- * naming scheme.
- */
- min1 = disknum / 26;
- min2 = disknum % 26;
- sprintf(buffer, "sd%c%c", 'a' + min1 - 1, 'a' + min2);
- }
- }
- static request_queue_t *sd_find_queue(kdev_t dev)
- {
- Scsi_Disk *dpnt;
- int target;
- target = DEVICE_NR(dev);
- dpnt = &rscsi_disks[target];
- if (!dpnt)
- return NULL; /* No such device */
- return &dpnt->device->request_queue;
- }
- static int sd_init_command(Scsi_Cmnd * SCpnt)
- {
- int dev, devm, block, this_count;
- Scsi_Disk *dpnt;
- #if CONFIG_SCSI_LOGGING
- char nbuff[6];
- #endif
- devm = SD_PARTITION(SCpnt->request.rq_dev);
- dev = DEVICE_NR(SCpnt->request.rq_dev);
- block = SCpnt->request.sector;
- this_count = SCpnt->request_bufflen >> 9;
- SCSI_LOG_HLQUEUE(1, printk("Doing sd request, dev = %d, block = %dn", devm, block));
- dpnt = &rscsi_disks[dev];
- if (devm >= (sd_template.dev_max << 4) ||
- !dpnt ||
- !dpnt->device->online ||
- block + SCpnt->request.nr_sectors > sd[devm].nr_sects) {
- SCSI_LOG_HLQUEUE(2, printk("Finishing %ld sectorsn", SCpnt->request.nr_sectors));
- SCSI_LOG_HLQUEUE(2, printk("Retry with 0x%pn", SCpnt));
- return 0;
- }
- block += sd[devm].start_sect;
- if (dpnt->device->changed) {
- /*
- * quietly refuse to do anything to a changed disc until the changed
- * bit has been reset
- */
- /* printk("SCSI disk has been changed. Prohibiting further I/O.n"); */
- return 0;
- }
- SCSI_LOG_HLQUEUE(2, sd_devname(devm, nbuff));
- SCSI_LOG_HLQUEUE(2, printk("%s : real dev = /dev/%d, block = %dn",
- nbuff, dev, block));
- /*
- * If we have a 1K hardware sectorsize, prevent access to single
- * 512 byte sectors. In theory we could handle this - in fact
- * the scsi cdrom driver must be able to handle this because
- * we typically use 1K blocksizes, and cdroms typically have
- * 2K hardware sectorsizes. Of course, things are simpler
- * with the cdrom, since it is read-only. For performance
- * reasons, the filesystems should be able to handle this
- * and not force the scsi disk driver to use bounce buffers
- * for this.
- */
- if (dpnt->device->sector_size == 1024) {
- if ((block & 1) || (SCpnt->request.nr_sectors & 1)) {
- printk("sd.c:Bad block number requested");
- return 0;
- } else {
- block = block >> 1;
- this_count = this_count >> 1;
- }
- }
- if (dpnt->device->sector_size == 2048) {
- if ((block & 3) || (SCpnt->request.nr_sectors & 3)) {
- printk("sd.c:Bad block number requested");
- return 0;
- } else {
- block = block >> 2;
- this_count = this_count >> 2;
- }
- }
- if (dpnt->device->sector_size == 4096) {
- if ((block & 7) || (SCpnt->request.nr_sectors & 7)) {
- printk("sd.c:Bad block number requested");
- return 0;
- } else {
- block = block >> 3;
- this_count = this_count >> 3;
- }
- }
- switch (SCpnt->request.cmd) {
- case WRITE:
- if (!dpnt->device->writeable) {
- return 0;
- }
- SCpnt->cmnd[0] = WRITE_6;
- SCpnt->sc_data_direction = SCSI_DATA_WRITE;
- break;
- case READ:
- SCpnt->cmnd[0] = READ_6;
- SCpnt->sc_data_direction = SCSI_DATA_READ;
- break;
- default:
- panic("Unknown sd command %dn", SCpnt->request.cmd);
- }
- SCSI_LOG_HLQUEUE(2, printk("%s : %s %d/%ld 512 byte blocks.n",
- nbuff,
- (SCpnt->request.cmd == WRITE) ? "writing" : "reading",
- this_count, SCpnt->request.nr_sectors));
- SCpnt->cmnd[1] = (SCpnt->device->scsi_level <= SCSI_2) ?
- ((SCpnt->lun << 5) & 0xe0) : 0;
- if (((this_count > 0xff) || (block > 0x1fffff)) || SCpnt->device->ten) {
- if (this_count > 0xffff)
- this_count = 0xffff;
- SCpnt->cmnd[0] += READ_10 - READ_6;
- SCpnt->cmnd[2] = (unsigned char) (block >> 24) & 0xff;
- SCpnt->cmnd[3] = (unsigned char) (block >> 16) & 0xff;
- SCpnt->cmnd[4] = (unsigned char) (block >> 8) & 0xff;
- SCpnt->cmnd[5] = (unsigned char) block & 0xff;
- SCpnt->cmnd[6] = SCpnt->cmnd[9] = 0;
- SCpnt->cmnd[7] = (unsigned char) (this_count >> 8) & 0xff;
- SCpnt->cmnd[8] = (unsigned char) this_count & 0xff;
- } else {
- if (this_count > 0xff)
- this_count = 0xff;
- SCpnt->cmnd[1] |= (unsigned char) ((block >> 16) & 0x1f);
- SCpnt->cmnd[2] = (unsigned char) ((block >> 8) & 0xff);
- SCpnt->cmnd[3] = (unsigned char) block & 0xff;
- SCpnt->cmnd[4] = (unsigned char) this_count;
- SCpnt->cmnd[5] = 0;
- }
- /*
- * We shouldn't disconnect in the middle of a sector, so with a dumb
- * host adapter, it's safe to assume that we can at least transfer
- * this many bytes between each connect / disconnect.
- */
- SCpnt->transfersize = dpnt->device->sector_size;
- SCpnt->underflow = this_count << 9;
- SCpnt->allowed = MAX_RETRIES;
- SCpnt->timeout_per_command = (SCpnt->device->type == TYPE_DISK ?
- SD_TIMEOUT : SD_MOD_TIMEOUT);
- /*
- * This is the completion routine we use. This is matched in terms
- * of capability to this function.
- */
- SCpnt->done = rw_intr;
- /*
- * This indicates that the command is ready from our end to be
- * queued.
- */
- return 1;
- }
- static int sd_open(struct inode *inode, struct file *filp)
- {
- int target, retval = -ENXIO;
- Scsi_Device * SDev;
- target = DEVICE_NR(inode->i_rdev);
- SCSI_LOG_HLQUEUE(1, printk("target=%d, max=%dn", target, sd_template.dev_max));
- if (target >= sd_template.dev_max || !rscsi_disks[target].device)
- return -ENXIO; /* No such device */
- /*
- * If the device is in error recovery, wait until it is done.
- * If the device is offline, then disallow any access to it.
- */
- if (!scsi_block_when_processing_errors(rscsi_disks[target].device)) {
- return -ENXIO;
- }
- /*
- * Make sure that only one process can do a check_change_disk at one time.
- * This is also used to lock out further access when the partition table
- * is being re-read.
- */
- while (rscsi_disks[target].device->busy) {
- barrier();
- cpu_relax();
- }
- /*
- * The following code can sleep.
- * Module unloading must be prevented
- */
- SDev = rscsi_disks[target].device;
- if (SDev->host->hostt->module)
- __MOD_INC_USE_COUNT(SDev->host->hostt->module);
- if (sd_template.module)
- __MOD_INC_USE_COUNT(sd_template.module);
- SDev->access_count++;
- if (rscsi_disks[target].device->removable) {
- SDev->allow_revalidate = 1;
- check_disk_change(inode->i_rdev);
- SDev->allow_revalidate = 0;
- /*
- * If the drive is empty, just let the open fail.
- */
- if ((!rscsi_disks[target].ready) && !(filp->f_flags & O_NDELAY)) {
- retval = -ENOMEDIUM;
- goto error_out;
- }
- /*
- * Similarly, if the device has the write protect tab set,
- * have the open fail if the user expects to be able to write
- * to the thing.
- */
- if ((rscsi_disks[target].write_prot) && (filp->f_mode & 2)) {
- retval = -EROFS;
- goto error_out;
- }
- }
- /*
- * It is possible that the disk changing stuff resulted in the device
- * being taken offline. If this is the case, report this to the user,
- * and don't pretend that
- * the open actually succeeded.
- */
- if (!SDev->online) {
- goto error_out;
- }
- /*
- * See if we are requesting a non-existent partition. Do this
- * after checking for disk change.
- */
- if (sd_sizes[SD_PARTITION(inode->i_rdev)] == 0) {
- goto error_out;
- }
- if (SDev->removable)
- if (SDev->access_count==1)
- if (scsi_block_when_processing_errors(SDev))
- scsi_ioctl(SDev, SCSI_IOCTL_DOORLOCK, NULL);
-
- return 0;
- error_out:
- SDev->access_count--;
- if (SDev->host->hostt->module)
- __MOD_DEC_USE_COUNT(SDev->host->hostt->module);
- if (sd_template.module)
- __MOD_DEC_USE_COUNT(sd_template.module);
- return retval;
- }
- static int sd_release(struct inode *inode, struct file *file)
- {
- int target;
- Scsi_Device * SDev;
- target = DEVICE_NR(inode->i_rdev);
- SDev = rscsi_disks[target].device;
- if (!SDev)
- return -ENODEV;
- SDev->access_count--;
- if (SDev->removable) {
- if (!SDev->access_count)
- if (scsi_block_when_processing_errors(SDev))
- scsi_ioctl(SDev, SCSI_IOCTL_DOORUNLOCK, NULL);
- }
- if (SDev->host->hostt->module)
- __MOD_DEC_USE_COUNT(SDev->host->hostt->module);
- if (sd_template.module)
- __MOD_DEC_USE_COUNT(sd_template.module);
- return 0;
- }
- static struct block_device_operations sd_fops =
- {
- owner: THIS_MODULE,
- open: sd_open,
- release: sd_release,
- ioctl: sd_ioctl,
- check_media_change: check_scsidisk_media_change,
- revalidate: fop_revalidate_scsidisk
- };
- /*
- * If we need more than one SCSI disk major (i.e. more than
- * 16 SCSI disks), we'll have to kmalloc() more gendisks later.
- */
- static struct gendisk sd_gendisk =
- {
- major: SCSI_DISK0_MAJOR,
- major_name: "sd",
- minor_shift: 4,
- max_p: 1 << 4,
- fops: &sd_fops,
- };
- static struct gendisk *sd_gendisks = &sd_gendisk;
- #define SD_GENDISK(i) sd_gendisks[(i) / SCSI_DISKS_PER_MAJOR]
- /*
- * rw_intr is the interrupt routine for the device driver.
- * It will be notified on the end of a SCSI read / write, and
- * will take one of several actions based on success or failure.
- */
- static void rw_intr(Scsi_Cmnd * SCpnt)
- {
- int result = SCpnt->result;
- #if CONFIG_SCSI_LOGGING
- char nbuff[6];
- #endif
- int this_count = SCpnt->bufflen >> 9;
- int good_sectors = (result == 0 ? this_count : 0);
- int block_sectors = 1;
- SCSI_LOG_HLCOMPLETE(1, sd_devname(DEVICE_NR(SCpnt->request.rq_dev), nbuff));
- SCSI_LOG_HLCOMPLETE(1, printk("%s : rw_intr(%d, %x [%x %x])n", nbuff,
- SCpnt->host->host_no,
- result,
- SCpnt->sense_buffer[0],
- SCpnt->sense_buffer[2]));
- /*
- Handle MEDIUM ERRORs that indicate partial success. Since this is a
- relatively rare error condition, no care is taken to avoid
- unnecessary additional work such as memcpy's that could be avoided.
- */
- /* An error occurred */
- if (driver_byte(result) != 0) {
- /* Sense data is valid */
- if (SCpnt->sense_buffer[0] == 0xF0 && SCpnt->sense_buffer[2] == MEDIUM_ERROR) {
- long error_sector = (SCpnt->sense_buffer[3] << 24) |
- (SCpnt->sense_buffer[4] << 16) |
- (SCpnt->sense_buffer[5] << 8) |
- SCpnt->sense_buffer[6];
- if (SCpnt->request.bh != NULL)
- block_sectors = SCpnt->request.bh->b_size >> 9;
- switch (SCpnt->device->sector_size) {
- case 1024:
- error_sector <<= 1;
- if (block_sectors < 2)
- block_sectors = 2;
- break;
- case 2048:
- error_sector <<= 2;
- if (block_sectors < 4)
- block_sectors = 4;
- break;
- case 4096:
- error_sector <<=3;
- if (block_sectors < 8)
- block_sectors = 8;
- break;
- case 256:
- error_sector >>= 1;
- break;
- default:
- break;
- }
- error_sector -= sd[SD_PARTITION(SCpnt->request.rq_dev)].start_sect;
- error_sector &= ~(block_sectors - 1);
- good_sectors = error_sector - SCpnt->request.sector;
- if (good_sectors < 0 || good_sectors >= this_count)
- good_sectors = 0;
- }
- if (SCpnt->sense_buffer[2] == ILLEGAL_REQUEST) {
- if (SCpnt->device->ten == 1) {
- if (SCpnt->cmnd[0] == READ_10 ||
- SCpnt->cmnd[0] == WRITE_10)
- SCpnt->device->ten = 0;
- }
- }
- }
- /*
- * This calls the generic completion function, now that we know
- * how many actual sectors finished, and how many sectors we need
- * to say have failed.
- */
- scsi_io_completion(SCpnt, good_sectors, block_sectors);
- }
- /*
- * requeue_sd_request() is the request handler function for the sd driver.
- * Its function in life is to take block device requests, and translate
- * them to SCSI commands.
- */
- static int check_scsidisk_media_change(kdev_t full_dev)
- {
- int retval;
- int target;
- int flag = 0;
- Scsi_Device * SDev;
- target = DEVICE_NR(full_dev);
- SDev = rscsi_disks[target].device;
- if (target >= sd_template.dev_max || !SDev) {
- printk("SCSI disk request error: invalid device.n");
- return 0;
- }
- if (!SDev->removable)
- return 0;
- /*
- * If the device is offline, don't send any commands - just pretend as
- * if the command failed. If the device ever comes back online, we
- * can deal with it then. It is only because of unrecoverable errors
- * that we would ever take a device offline in the first place.
- */
- if (SDev->online == FALSE) {
- rscsi_disks[target].ready = 0;
- SDev->changed = 1;
- return 1; /* This will force a flush, if called from
- * check_disk_change */
- }
- /* Using Start/Stop enables differentiation between drive with
- * no cartridge loaded - NOT READY, drive with changed cartridge -
- * UNIT ATTENTION, or with same cartridge - GOOD STATUS.
- * This also handles drives that auto spin down. eg iomega jaz 1GB
- * as this will spin up the drive.
- */
- retval = -ENODEV;
- if (scsi_block_when_processing_errors(SDev))
- retval = scsi_ioctl(SDev, SCSI_IOCTL_START_UNIT, NULL);
- if (retval) { /* Unable to test, unit probably not ready.
- * This usually means there is no disc in the
- * drive. Mark as changed, and we will figure
- * it out later once the drive is available
- * again. */
- rscsi_disks[target].ready = 0;
- SDev->changed = 1;
- return 1; /* This will force a flush, if called from
- * check_disk_change */
- }
- /*
- * for removable scsi disk ( FLOPTICAL ) we have to recognise the
- * presence of disk in the drive. This is kept in the Scsi_Disk
- * struct and tested at open ! Daniel Roche ( dan@lectra.fr )
- */
- rscsi_disks[target].ready = 1; /* FLOPTICAL */
- retval = SDev->changed;
- if (!flag)
- SDev->changed = 0;
- return retval;
- }
- static int sd_init_onedisk(int i)
- {
- unsigned char cmd[10];
- char nbuff[6];
- unsigned char *buffer;
- unsigned long spintime_value = 0;
- int the_result, retries, spintime;
- int sector_size;
- Scsi_Request *SRpnt;
- /*
- * Get the name of the disk, in case we need to log it somewhere.
- */
- sd_devname(i, nbuff);
- /*
- * If the device is offline, don't try and read capacity or any
- * of the other niceties.
- */
- if (rscsi_disks[i].device->online == FALSE)
- return i;
- /*
- * We need to retry the READ_CAPACITY because a UNIT_ATTENTION is
- * considered a fatal error, and many devices report such an error
- * just after a scsi bus reset.
- */
- SRpnt = scsi_allocate_request(rscsi_disks[i].device);
- if (!SRpnt) {
- printk(KERN_WARNING "(sd_init_onedisk:) Request allocation failure.n");
- return i;
- }
- buffer = (unsigned char *) scsi_malloc(512);
- if (!buffer) {
- printk(KERN_WARNING "(sd_init_onedisk:) Memory allocation failure.n");
- scsi_release_request(SRpnt);
- return i;
- }
- spintime = 0;
- /* Spin up drives, as required. Only do this at boot time */
- /* Spinup needs to be done for module loads too. */
- do {
- retries = 0;
- while (retries < 3) {
- cmd[0] = TEST_UNIT_READY;
- cmd[1] = (rscsi_disks[i].device->scsi_level <= SCSI_2) ?
- ((rscsi_disks[i].device->lun << 5) & 0xe0) : 0;
- memset((void *) &cmd[2], 0, 8);
- SRpnt->sr_cmd_len = 0;
- SRpnt->sr_sense_buffer[0] = 0;
- SRpnt->sr_sense_buffer[2] = 0;
- SRpnt->sr_data_direction = SCSI_DATA_NONE;
- scsi_wait_req (SRpnt, (void *) cmd, (void *) buffer,
- 0/*512*/, SD_TIMEOUT, MAX_RETRIES);
- the_result = SRpnt->sr_result;
- retries++;
- if (the_result == 0
- || SRpnt->sr_sense_buffer[2] != UNIT_ATTENTION)
- break;
- }
- /*
- * If the drive has indicated to us that it doesn't have
- * any media in it, don't bother with any of the rest of
- * this crap.
- */
- if( the_result != 0
- && ((driver_byte(the_result) & DRIVER_SENSE) != 0)
- && SRpnt->sr_sense_buffer[2] == UNIT_ATTENTION
- && SRpnt->sr_sense_buffer[12] == 0x3A ) {
- rscsi_disks[i].capacity = 0x1fffff;
- sector_size = 512;
- rscsi_disks[i].device->changed = 1;
- rscsi_disks[i].ready = 0;
- break;
- }
- /* Look for non-removable devices that return NOT_READY.
- * Issue command to spin up drive for these cases. */
- if (the_result && !rscsi_disks[i].device->removable &&
- SRpnt->sr_sense_buffer[2] == NOT_READY) {
- unsigned long time1;
- if (!spintime) {
- printk("%s: Spinning up disk...", nbuff);
- cmd[0] = START_STOP;
- cmd[1] = (rscsi_disks[i].device->scsi_level <= SCSI_2) ?
- ((rscsi_disks[i].device->lun << 5) & 0xe0) : 0;
- cmd[1] |= 1; /* Return immediately */
- memset((void *) &cmd[2], 0, 8);
- cmd[4] = 1; /* Start spin cycle */
- SRpnt->sr_cmd_len = 0;
- SRpnt->sr_sense_buffer[0] = 0;
- SRpnt->sr_sense_buffer[2] = 0;
- SRpnt->sr_data_direction = SCSI_DATA_READ;
- scsi_wait_req(SRpnt, (void *) cmd, (void *) buffer,
- 0/*512*/, SD_TIMEOUT, MAX_RETRIES);
- spintime_value = jiffies;
- }
- spintime = 1;
- time1 = HZ;
- /* Wait 1 second for next try */
- do {
- current->state = TASK_UNINTERRUPTIBLE;
- time1 = schedule_timeout(time1);
- } while(time1);
- printk(".");
- }
- } while (the_result && spintime &&
- time_after(spintime_value + 100 * HZ, jiffies));
- if (spintime) {
- if (the_result)
- printk("not responding...n");
- else
- printk("readyn");
- }
- retries = 3;
- do {
- cmd[0] = READ_CAPACITY;
- cmd[1] = (rscsi_disks[i].device->scsi_level <= SCSI_2) ?
- ((rscsi_disks[i].device->lun << 5) & 0xe0) : 0;
- memset((void *) &cmd[2], 0, 8);
- memset((void *) buffer, 0, 8);
- SRpnt->sr_cmd_len = 0;
- SRpnt->sr_sense_buffer[0] = 0;
- SRpnt->sr_sense_buffer[2] = 0;
- SRpnt->sr_data_direction = SCSI_DATA_READ;
- scsi_wait_req(SRpnt, (void *) cmd, (void *) buffer,
- 8, SD_TIMEOUT, MAX_RETRIES);
- the_result = SRpnt->sr_result;
- retries--;
- } while (the_result && retries);
- /*
- * The SCSI standard says:
- * "READ CAPACITY is necessary for self configuring software"
- * While not mandatory, support of READ CAPACITY is strongly
- * encouraged.
- * We used to die if we couldn't successfully do a READ CAPACITY.
- * But, now we go on about our way. The side effects of this are
- *
- * 1. We can't know block size with certainty. I have said
- * "512 bytes is it" as this is most common.
- *
- * 2. Recovery from when someone attempts to read past the
- * end of the raw device will be slower.
- */
- if (the_result) {
- printk("%s : READ CAPACITY failed.n"
- "%s : status = %x, message = %02x, host = %d, driver = %02x n",
- nbuff, nbuff,
- status_byte(the_result),
- msg_byte(the_result),
- host_byte(the_result),
- driver_byte(the_result)
- );
- if (driver_byte(the_result) & DRIVER_SENSE)
- print_req_sense("sd", SRpnt);
- else
- printk("%s : sense not available. n", nbuff);
- printk("%s : block size assumed to be 512 bytes, disk size 1GB. n",
- nbuff);
- rscsi_disks[i].capacity = 0x1fffff;
- sector_size = 512;
- /* Set dirty bit for removable devices if not ready -
- * sometimes drives will not report this properly. */
- if (rscsi_disks[i].device->removable &&
- SRpnt->sr_sense_buffer[2] == NOT_READY)
- rscsi_disks[i].device->changed = 1;
- } else {
- /*
- * FLOPTICAL, if read_capa is ok, drive is assumed to be ready
- */
- rscsi_disks[i].ready = 1;
- rscsi_disks[i].capacity = 1 + ((buffer[0] << 24) |
- (buffer[1] << 16) |
- (buffer[2] << 8) |
- buffer[3]);
- sector_size = (buffer[4] << 24) |
- (buffer[5] << 16) | (buffer[6] << 8) | buffer[7];
- if (sector_size == 0) {
- sector_size = 512;
- printk("%s : sector size 0 reported, assuming 512.n",
- nbuff);
- }
- if (sector_size != 512 &&
- sector_size != 1024 &&
- sector_size != 2048 &&
- sector_size != 4096 &&
- sector_size != 256) {
- printk("%s : unsupported sector size %d.n",
- nbuff, sector_size);
- /*
- * The user might want to re-format the drive with
- * a supported sectorsize. Once this happens, it
- * would be relatively trivial to set the thing up.
- * For this reason, we leave the thing in the table.
- */
- rscsi_disks[i].capacity = 0;
- }
- if (sector_size > 1024) {
- int m;
- /*
- * We must fix the sd_blocksizes and sd_hardsizes
- * to allow us to read the partition tables.
- * The disk reading code does not allow for reading
- * of partial sectors.
- */
- for (m = i << 4; m < ((i + 1) << 4); m++) {
- sd_blocksizes[m] = sector_size;
- }
- } {
- /*
- * The msdos fs needs to know the hardware sector size
- * So I have created this table. See ll_rw_blk.c
- * Jacques Gelinas (Jacques@solucorp.qc.ca)
- */
- int m;
- int hard_sector = sector_size;
- int sz = rscsi_disks[i].capacity * (hard_sector/256);
- /* There are 16 minors allocated for each major device */
- for (m = i << 4; m < ((i + 1) << 4); m++) {
- sd_hardsizes[m] = hard_sector;
- }
- printk("SCSI device %s: "
- "%d %d-byte hdwr sectors (%d MB)n",
- nbuff, rscsi_disks[i].capacity,
- hard_sector, (sz/2 - sz/1250 + 974)/1950);
- }
- /* Rescale capacity to 512-byte units */
- if (sector_size == 4096)
- rscsi_disks[i].capacity <<= 3;
- if (sector_size == 2048)
- rscsi_disks[i].capacity <<= 2;
- if (sector_size == 1024)
- rscsi_disks[i].capacity <<= 1;
- if (sector_size == 256)
- rscsi_disks[i].capacity >>= 1;
- }
- /*
- * Unless otherwise specified, this is not write protected.
- */
- rscsi_disks[i].write_prot = 0;
- if (rscsi_disks[i].device->removable && rscsi_disks[i].ready) {
- /* FLOPTICAL */
- /*
- * For removable scsi disk ( FLOPTICAL ) we have to recognise
- * the Write Protect Flag. This flag is kept in the Scsi_Disk
- * struct and tested at open !
- * Daniel Roche ( dan@lectra.fr )
- *
- * Changed to get all pages (0x3f) rather than page 1 to
- * get around devices which do not have a page 1. Since
- * we're only interested in the header anyway, this should
- * be fine.
- * -- Matthew Dharm (mdharm-scsi@one-eyed-alien.net)
- */
- memset((void *) &cmd[0], 0, 8);
- cmd[0] = MODE_SENSE;
- cmd[1] = (rscsi_disks[i].device->scsi_level <= SCSI_2) ?
- ((rscsi_disks[i].device->lun << 5) & 0xe0) : 0;
- cmd[2] = 0x3f; /* Get all pages */
- cmd[4] = 255; /* Ask for 255 bytes, even tho we want just the first 8 */
- SRpnt->sr_cmd_len = 0;
- SRpnt->sr_sense_buffer[0] = 0;
- SRpnt->sr_sense_buffer[2] = 0;
- /* same code as READCAPA !! */
- SRpnt->sr_data_direction = SCSI_DATA_READ;
- scsi_wait_req(SRpnt, (void *) cmd, (void *) buffer,
- 512, SD_TIMEOUT, MAX_RETRIES);
- the_result = SRpnt->sr_result;
- if (the_result) {
- printk("%s: test WP failed, assume Write Enabledn", nbuff);
- } else {
- rscsi_disks[i].write_prot = ((buffer[2] & 0x80) != 0);
- printk("%s: Write Protect is %sn", nbuff,
- rscsi_disks[i].write_prot ? "on" : "off");
- }
- } /* check for write protect */
- SRpnt->sr_device->ten = 1;
- SRpnt->sr_device->remap = 1;
- SRpnt->sr_device->sector_size = sector_size;
- /* Wake up a process waiting for device */
- scsi_release_request(SRpnt);
- SRpnt = NULL;
- scsi_free(buffer, 512);
- return i;
- }
- /*
- * The sd_init() function looks at all SCSI drives present, determines
- * their size, and reads partition table entries for them.
- */
- static int sd_registered;
- static int sd_init()
- {
- int i;
- if (sd_template.dev_noticed == 0)
- return 0;
- if (!rscsi_disks)
- sd_template.dev_max = sd_template.dev_noticed + SD_EXTRA_DEVS;
- if (sd_template.dev_max > N_SD_MAJORS * SCSI_DISKS_PER_MAJOR)
- sd_template.dev_max = N_SD_MAJORS * SCSI_DISKS_PER_MAJOR;
- if (!sd_registered) {
- for (i = 0; i < N_USED_SD_MAJORS; i++) {
- if (devfs_register_blkdev(SD_MAJOR(i), "sd", &sd_fops)) {
- printk("Unable to get major %d for SCSI diskn", SD_MAJOR(i));
- sd_template.dev_noticed = 0;
- return 1;
- }
- }
- sd_registered++;
- }
- /* We do not support attaching loadable devices yet. */
- if (rscsi_disks)
- return 0;
- rscsi_disks = kmalloc(sd_template.dev_max * sizeof(Scsi_Disk), GFP_ATOMIC);
- if (!rscsi_disks)
- goto cleanup_devfs;
- memset(rscsi_disks, 0, sd_template.dev_max * sizeof(Scsi_Disk));
- /* for every (necessary) major: */
- sd_sizes = kmalloc((sd_template.dev_max << 4) * sizeof(int), GFP_ATOMIC);
- if (!sd_sizes)
- goto cleanup_disks;
- memset(sd_sizes, 0, (sd_template.dev_max << 4) * sizeof(int));
- sd_blocksizes = kmalloc((sd_template.dev_max << 4) * sizeof(int), GFP_ATOMIC);
- if (!sd_blocksizes)
- goto cleanup_sizes;
-
- sd_hardsizes = kmalloc((sd_template.dev_max << 4) * sizeof(int), GFP_ATOMIC);
- if (!sd_hardsizes)
- goto cleanup_blocksizes;
- sd_max_sectors = kmalloc((sd_template.dev_max << 4) * sizeof(int), GFP_ATOMIC);
- if (!sd_max_sectors)
- goto cleanup_max_sectors;
- for (i = 0; i < sd_template.dev_max << 4; i++) {
- sd_blocksizes[i] = 1024;
- sd_hardsizes[i] = 512;
- /*
- * Allow lowlevel device drivers to generate 512k large scsi
- * commands if they know what they're doing and they ask for it
- * explicitly via the SHpnt->max_sectors API.
- */
- sd_max_sectors[i] = MAX_SEGMENTS*8;
- }
- for (i = 0; i < N_USED_SD_MAJORS; i++) {
- blksize_size[SD_MAJOR(i)] = sd_blocksizes + i * (SCSI_DISKS_PER_MAJOR << 4);
- hardsect_size[SD_MAJOR(i)] = sd_hardsizes + i * (SCSI_DISKS_PER_MAJOR << 4);
- max_sectors[SD_MAJOR(i)] = sd_max_sectors + i * (SCSI_DISKS_PER_MAJOR << 4);
- }
- /*
- * FIXME: should unregister blksize_size, hardsect_size and max_sectors when
- * the module is unloaded.
- */
- sd = kmalloc((sd_template.dev_max << 4) *
- sizeof(struct hd_struct),
- GFP_ATOMIC);
- if (!sd)
- goto cleanup_sd;
- memset(sd, 0, (sd_template.dev_max << 4) * sizeof(struct hd_struct));
- if (N_USED_SD_MAJORS > 1)
- sd_gendisks = kmalloc(N_USED_SD_MAJORS * sizeof(struct gendisk), GFP_ATOMIC);
- if (!sd_gendisks)
- goto cleanup_sd_gendisks;
- for (i = 0; i < N_USED_SD_MAJORS; i++) {
- sd_gendisks[i] = sd_gendisk;
- sd_gendisks[i].de_arr = kmalloc (SCSI_DISKS_PER_MAJOR * sizeof *sd_gendisks[i].de_arr,
- GFP_ATOMIC);
- if (!sd_gendisks[i].de_arr)
- goto cleanup_gendisks_de_arr;
- memset (sd_gendisks[i].de_arr, 0,
- SCSI_DISKS_PER_MAJOR * sizeof *sd_gendisks[i].de_arr);
- sd_gendisks[i].flags = kmalloc (SCSI_DISKS_PER_MAJOR * sizeof *sd_gendisks[i].flags,
- GFP_ATOMIC);
- if (!sd_gendisks[i].flags)
- goto cleanup_gendisks_flags;
- memset (sd_gendisks[i].flags, 0,
- SCSI_DISKS_PER_MAJOR * sizeof *sd_gendisks[i].flags);
- sd_gendisks[i].major = SD_MAJOR(i);
- sd_gendisks[i].major_name = "sd";
- sd_gendisks[i].minor_shift = 4;
- sd_gendisks[i].max_p = 1 << 4;
- sd_gendisks[i].part = sd + (i * SCSI_DISKS_PER_MAJOR << 4);
- sd_gendisks[i].sizes = sd_sizes + (i * SCSI_DISKS_PER_MAJOR << 4);
- sd_gendisks[i].nr_real = 0;
- sd_gendisks[i].real_devices =
- (void *) (rscsi_disks + i * SCSI_DISKS_PER_MAJOR);
- }
- return 0;
- cleanup_gendisks_flags:
- kfree(sd_gendisks[i].de_arr);
- cleanup_gendisks_de_arr:
- while (--i >= 0 ) {
- kfree(sd_gendisks[i].de_arr);
- kfree(sd_gendisks[i].flags);
- }
- if (sd_gendisks != &sd_gendisk)
- kfree(sd_gendisks);
- cleanup_sd_gendisks:
- kfree(sd);
- cleanup_sd:
- kfree(sd_max_sectors);
- cleanup_max_sectors:
- kfree(sd_hardsizes);
- cleanup_blocksizes:
- kfree(sd_blocksizes);
- cleanup_sizes:
- kfree(sd_sizes);
- cleanup_disks:
- kfree(rscsi_disks);
- rscsi_disks = NULL;
- cleanup_devfs:
- for (i = 0; i < N_USED_SD_MAJORS; i++) {
- devfs_unregister_blkdev(SD_MAJOR(i), "sd");
- }
- sd_registered--;
- sd_template.dev_noticed = 0;
- return 1;
- }
- static void sd_finish()
- {
- int i;
- for (i = 0; i < N_USED_SD_MAJORS; i++) {
- blk_dev[SD_MAJOR(i)].queue = sd_find_queue;
- add_gendisk(&sd_gendisks[i]);
- }
- for (i = 0; i < sd_template.dev_max; ++i)
- if (!rscsi_disks[i].capacity && rscsi_disks[i].device) {
- sd_init_onedisk(i);
- if (!rscsi_disks[i].has_part_table) {
- sd_sizes[i << 4] = rscsi_disks[i].capacity;
- register_disk(&SD_GENDISK(i), MKDEV_SD(i),
- 1<<4, &sd_fops,
- rscsi_disks[i].capacity);
- rscsi_disks[i].has_part_table = 1;
- }
- }
- /* If our host adapter is capable of scatter-gather, then we increase
- * the read-ahead to 60 blocks (120 sectors). If not, we use
- * a two block (4 sector) read ahead. We can only respect this with the
- * granularity of every 16 disks (one device major).
- */
- for (i = 0; i < N_USED_SD_MAJORS; i++) {
- read_ahead[SD_MAJOR(i)] =
- (rscsi_disks[i * SCSI_DISKS_PER_MAJOR].device
- && rscsi_disks[i * SCSI_DISKS_PER_MAJOR].device->host->sg_tablesize)
- ? 120 /* 120 sector read-ahead */
- : 4; /* 4 sector read-ahead */
- }
- return;
- }
- static int sd_detect(Scsi_Device * SDp)
- {
- if (SDp->type != TYPE_DISK && SDp->type != TYPE_MOD)
- return 0;
- sd_template.dev_noticed++;
- return 1;
- }
- static int sd_attach(Scsi_Device * SDp)
- {
- unsigned int devnum;
- Scsi_Disk *dpnt;
- int i;
- char nbuff[6];
- if (SDp->type != TYPE_DISK && SDp->type != TYPE_MOD)
- return 0;
- if (sd_template.nr_dev >= sd_template.dev_max || rscsi_disks == NULL) {
- SDp->attached--;
- return 1;
- }
- for (dpnt = rscsi_disks, i = 0; i < sd_template.dev_max; i++, dpnt++)
- if (!dpnt->device)
- break;
- if (i >= sd_template.dev_max) {
- printk(KERN_WARNING "scsi_devices corrupt (sd),"
- " nr_dev %d dev_max %dn",
- sd_template.nr_dev, sd_template.dev_max);
- SDp->attached--;
- return 1;
- }
- rscsi_disks[i].device = SDp;
- rscsi_disks[i].has_part_table = 0;
- sd_template.nr_dev++;
- SD_GENDISK(i).nr_real++;
- devnum = i % SCSI_DISKS_PER_MAJOR;
- SD_GENDISK(i).de_arr[devnum] = SDp->de;
- if (SDp->removable)
- SD_GENDISK(i).flags[devnum] |= GENHD_FL_REMOVABLE;
- sd_devname(i, nbuff);
- printk("Attached scsi %sdisk %s at scsi%d, channel %d, id %d, lun %dn",
- SDp->removable ? "removable " : "",
- nbuff, SDp->host->host_no, SDp->channel, SDp->id, SDp->lun);
- return 0;
- }
- #define DEVICE_BUSY rscsi_disks[target].device->busy
- #define ALLOW_REVALIDATE rscsi_disks[target].device->allow_revalidate
- #define USAGE rscsi_disks[target].device->access_count
- #define CAPACITY rscsi_disks[target].capacity
- #define MAYBE_REINIT sd_init_onedisk(target)
- /* This routine is called to flush all partitions and partition tables
- * for a changed scsi disk, and then re-read the new partition table.
- * If we are revalidating a disk because of a media change, then we
- * enter with usage == 0. If we are using an ioctl, we automatically have
- * usage == 1 (we need an open channel to use an ioctl :-), so this
- * is our limit.
- */
- int revalidate_scsidisk(kdev_t dev, int maxusage)
- {
- int target;
- int max_p;
- int start;
- int i;
- target = DEVICE_NR(dev);
- if (DEVICE_BUSY || (ALLOW_REVALIDATE == 0 && USAGE > maxusage)) {
- printk("Device busy for revalidation (usage=%d)n", USAGE);
- return -EBUSY;
- }
- DEVICE_BUSY = 1;
- max_p = sd_gendisks->max_p;
- start = target << sd_gendisks->minor_shift;
- for (i = max_p - 1; i >= 0; i--) {
- int index = start + i;
- invalidate_device(MKDEV_SD_PARTITION(index), 1);
- sd_gendisks->part[index].start_sect = 0;
- sd_gendisks->part[index].nr_sects = 0;
- /*
- * Reset the blocksize for everything so that we can read
- * the partition table. Technically we will determine the
- * correct block size when we revalidate, but we do this just
- * to make sure that everything remains consistent.
- */
- sd_blocksizes[index] = 1024;
- if (rscsi_disks[target].device->sector_size == 2048)
- sd_blocksizes[index] = 2048;
- else
- sd_blocksizes[index] = 1024;
- }
- #ifdef MAYBE_REINIT
- MAYBE_REINIT;
- #endif
- grok_partitions(&SD_GENDISK(target), target % SCSI_DISKS_PER_MAJOR,
- 1<<4, CAPACITY);
- DEVICE_BUSY = 0;
- return 0;
- }
- static int fop_revalidate_scsidisk(kdev_t dev)
- {
- return revalidate_scsidisk(dev, 0);
- }
- static void sd_detach(Scsi_Device * SDp)
- {
- Scsi_Disk *dpnt;
- int i, j;
- int max_p;
- int start;
- if (rscsi_disks == NULL)
- return;
- for (dpnt = rscsi_disks, i = 0; i < sd_template.dev_max; i++, dpnt++)
- if (dpnt->device == SDp) {
- /* If we are disconnecting a disk driver, sync and invalidate
- * everything */
- max_p = sd_gendisk.max_p;
- start = i << sd_gendisk.minor_shift;
- for (j = max_p - 1; j >= 0; j--) {
- int index = start + j;
- invalidate_device(MKDEV_SD_PARTITION(index), 1);
- sd_gendisks->part[index].start_sect = 0;
- sd_gendisks->part[index].nr_sects = 0;
- sd_sizes[index] = 0;
- }
- devfs_register_partitions (&SD_GENDISK (i),
- SD_MINOR_NUMBER (start), 1);
- /* unregister_disk() */
- dpnt->has_part_table = 0;
- dpnt->device = NULL;
- dpnt->capacity = 0;
- SDp->attached--;
- sd_template.dev_noticed--;
- sd_template.nr_dev--;
- SD_GENDISK(i).nr_real--;
- return;
- }
- return;
- }
- static int __init init_sd(void)
- {
- sd_template.module = THIS_MODULE;
- return scsi_register_module(MODULE_SCSI_DEV, &sd_template);
- }
- static void __exit exit_sd(void)
- {
- int i;
- scsi_unregister_module(MODULE_SCSI_DEV, &sd_template);
- for (i = 0; i < N_USED_SD_MAJORS; i++)
- devfs_unregister_blkdev(SD_MAJOR(i), "sd");
- sd_registered--;
- if (rscsi_disks != NULL) {
- kfree(rscsi_disks);
- kfree(sd_sizes);
- kfree(sd_blocksizes);
- kfree(sd_hardsizes);
- kfree((char *) sd);
- }
- for (i = 0; i < N_USED_SD_MAJORS; i++) {
- del_gendisk(&sd_gendisks[i]);
- blk_size[SD_MAJOR(i)] = NULL;
- hardsect_size[SD_MAJOR(i)] = NULL;
- read_ahead[SD_MAJOR(i)] = 0;
- }
- sd_template.dev_max = 0;
- if (sd_gendisks != &sd_gendisk)
- kfree(sd_gendisks);
- }
- module_init(init_sd);
- module_exit(exit_sd);
- MODULE_LICENSE("GPL");