diff options
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/cciss.c | 748 | ||||
| -rw-r--r-- | drivers/block/cciss.h | 2 | ||||
| -rw-r--r-- | drivers/block/cciss_scsi.c | 195 | ||||
| -rw-r--r-- | drivers/block/xen-blkfront.c | 4 |
4 files changed, 513 insertions, 436 deletions
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c index 0ce0c279aabf..b73116ef9236 100644 --- a/drivers/block/cciss.c +++ b/drivers/block/cciss.c @@ -159,7 +159,7 @@ static int cciss_ioctl(struct inode *inode, struct file *filep, static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo); static int cciss_revalidate(struct gendisk *disk); -static int rebuild_lun_table(ctlr_info_t *h, struct gendisk *del_disk); +static int rebuild_lun_table(ctlr_info_t *h, int first_time); static int deregister_disk(struct gendisk *disk, drive_info_struct *drv, int clear_all); @@ -171,7 +171,6 @@ static void cciss_geometry_inquiry(int ctlr, int logvol, int withirq, sector_t total_size, unsigned int block_size, InquiryData_struct *inq_buff, drive_info_struct *drv); -static void cciss_getgeometry(int cntl_num); static void __devinit cciss_interrupt_mode(ctlr_info_t *, struct pci_dev *, __u32); static void start_io(ctlr_info_t *h); @@ -929,8 +928,10 @@ static int cciss_ioctl(struct inode *inode, struct file *filep, return 0; } + case CCISS_DEREGDISK: + case CCISS_REGNEWD: case CCISS_REVALIDVOLS: - return rebuild_lun_table(host, NULL); + return rebuild_lun_table(host, 0); case CCISS_GETLUNINFO:{ LogvolInfo_struct luninfo; @@ -943,12 +944,6 @@ static int cciss_ioctl(struct inode *inode, struct file *filep, return -EFAULT; return 0; } - case CCISS_DEREGDISK: - return rebuild_lun_table(host, disk); - - case CCISS_REGNEWD: - return rebuild_lun_table(host, NULL); - case CCISS_PASSTHRU: { IOCTL_Command_struct iocommand; @@ -1134,7 +1129,7 @@ static int cciss_ioctl(struct inode *inode, struct file *filep, if (ioc->Request.Type.Direction == XFER_WRITE) { if (copy_from_user (buff[sg_used], data_ptr, sz)) { - status = -ENOMEM; + status = -EFAULT; goto cleanup1; } } else { @@ -1330,15 +1325,84 @@ static void cciss_softirq_done(struct request *rq) spin_unlock_irqrestore(&h->lock, flags); } +/* This function gets the serial number of a logical drive via + * inquiry page 0x83. Serial no. is 16 bytes. If the serial + * number cannot be had, for whatever reason, 16 bytes of 0xff + * are returned instead. + */ +static void cciss_get_serial_no(int ctlr, int logvol, int withirq, + unsigned char *serial_no, int buflen) +{ +#define PAGE_83_INQ_BYTES 64 + int rc; + unsigned char *buf; + + if (buflen > 16) + buflen = 16; + memset(serial_no, 0xff, buflen); + buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL); + if (!buf) + return; + memset(serial_no, 0, buflen); + if (withirq) + rc = sendcmd_withirq(CISS_INQUIRY, ctlr, buf, + PAGE_83_INQ_BYTES, 1, logvol, 0x83, TYPE_CMD); + else + rc = sendcmd(CISS_INQUIRY, ctlr, buf, + PAGE_83_INQ_BYTES, 1, logvol, 0x83, NULL, TYPE_CMD); + if (rc == IO_OK) + memcpy(serial_no, &buf[8], buflen); + kfree(buf); + return; +} + +static void cciss_add_disk(ctlr_info_t *h, struct gendisk *disk, + int drv_index) +{ + disk->queue = blk_init_queue(do_cciss_request, &h->lock); + sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index); + disk->major = h->major; + disk->first_minor = drv_index << NWD_SHIFT; + disk->fops = &cciss_fops; + disk->private_data = &h->drv[drv_index]; + + /* Set up queue information */ + blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask); + + /* This is a hardware imposed limit. */ + blk_queue_max_hw_segments(disk->queue, MAXSGENTRIES); + + /* This is a limit in the driver and could be eliminated. */ + blk_queue_max_phys_segments(disk->queue, MAXSGENTRIES); + + blk_queue_max_sectors(disk->queue, h->cciss_max_sectors); + + blk_queue_softirq_done(disk->queue, cciss_softirq_done); + + disk->queue->queuedata = h; + + blk_queue_hardsect_size(disk->queue, + h->drv[drv_index].block_size); + + /* Make sure all queue data is written out before */ + /* setting h->drv[drv_index].queue, as setting this */ + /* allows the interrupt handler to start the queue */ + wmb(); + h->drv[drv_index].queue = disk->queue; + add_disk(disk); +} + /* This function will check the usage_count of the drive to be updated/added. - * If the usage_count is zero then the drive information will be updated and - * the disk will be re-registered with the kernel. If not then it will be - * left alone for the next reboot. The exception to this is disk 0 which - * will always be left registered with the kernel since it is also the - * controller node. Any changes to disk 0 will show up on the next - * reboot. + * If the usage_count is zero and it is a heretofore unknown drive, or, + * the drive's capacity, geometry, or serial number has changed, + * then the drive information will be updated and the disk will be + * re-registered with the kernel. If these conditions don't hold, + * then it will be left alone for the next reboot. The exception to this + * is disk 0 which will always be left registered with the kernel since it + * is also the controller node. Any changes to disk 0 will show up on + * the next reboot. */ -static void cciss_update_drive_info(int ctlr, int drv_index) +static void cciss_update_drive_info(int ctlr, int drv_index, int first_time) { ctlr_info_t *h = hba[ctlr]; struct gendisk *disk; @@ -1347,16 +1411,81 @@ static void cciss_update_drive_info(int ctlr, int drv_index) sector_t total_size; unsigned long flags = 0; int ret = 0; + drive_info_struct *drvinfo; + int was_only_controller_node; + + /* Get information about the disk and modify the driver structure */ + inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL); + drvinfo = kmalloc(sizeof(*drvinfo), GFP_KERNEL); + if (inq_buff == NULL || drvinfo == NULL) + goto mem_msg; + + /* See if we're trying to update the "controller node" + * this will happen the when the first logical drive gets + * created by ACU. + */ + was_only_controller_node = (drv_index == 0 && + h->drv[0].raid_level == -1); - /* if the disk already exists then deregister it before proceeding */ - if (h->drv[drv_index].raid_level != -1) { + /* testing to see if 16-byte CDBs are already being used */ + if (h->cciss_read == CCISS_READ_16) { + cciss_read_capacity_16(h->ctlr, drv_index, 1, + &total_size, &block_size); + + } else { + cciss_read_capacity(ctlr, drv_index, 1, + &total_size, &block_size); + + /* if read_capacity returns all F's this volume is >2TB */ + /* in size so we switch to 16-byte CDB's for all */ + /* read/write ops */ + if (total_size == 0xFFFFFFFFULL) { + cciss_read_capacity_16(ctlr, drv_index, 1, + &total_size, &block_size); + h->cciss_read = CCISS_READ_16; + h->cciss_write = CCISS_WRITE_16; + } else { + h->cciss_read = CCISS_READ_10; + h->cciss_write = CCISS_WRITE_10; + } + } + + cciss_geometry_inquiry(ctlr, drv_index, 1, total_size, block_size, + inq_buff, drvinfo); + drvinfo->block_size = block_size; + drvinfo->nr_blocks = total_size + 1; + + cciss_get_serial_no(ctlr, drv_index, 1, drvinfo->serial_no, + sizeof(drvinfo->serial_no)); + + /* Is it the same disk we already know, and nothing's changed? */ + if (h->drv[drv_index].raid_level != -1 && + ((memcmp(drvinfo->serial_no, + h->drv[drv_index].serial_no, 16) == 0) && + drvinfo->block_size == h->drv[drv_index].block_size && + drvinfo->nr_blocks == h->drv[drv_index].nr_blocks && + drvinfo->heads == h->drv[drv_index].heads && + drvinfo->sectors == h->drv[drv_index].sectors && + drvinfo->cylinders == h->drv[drv_index].cylinders)) + /* The disk is unchanged, nothing to update */ + goto freeret; + + /* If we get here it's not the same disk, or something's changed, + * so we need to * deregister it, and re-register it, if it's not + * in use. + * If the disk already exists then deregister it before proceeding + * (unless it's the first disk (for the controller node). + */ + if (h->drv[drv_index].raid_level != -1 && drv_index != 0) { + printk(KERN_WARNING "disk %d has changed.\n", drv_index); spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); h->drv[drv_index].busy_configuring = 1; spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); - /* deregister_disk sets h->drv[drv_index].queue = NULL */ - /* which keeps the interrupt handler from starting */ - /* the queue. */ + /* deregister_disk sets h->drv[drv_index].queue = NULL + * which keeps the interrupt handler from starting + * the queue. + */ ret = deregister_disk(h->gendisk[drv_index], &h->drv[drv_index], 0); h->drv[drv_index].busy_configuring = 0; @@ -1364,81 +1493,37 @@ static void cciss_update_drive_info(int ctlr, int drv_index) /* If the disk is in use return */ if (ret) - return; + goto freeret; - /* Get information about the disk and modify the driver structure */ - inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL); - if (inq_buff == NULL) - goto mem_msg; - - /* testing to see if 16-byte CDBs are already being used */ - if (h->cciss_read == CCISS_READ_16) { - cciss_read_capacity_16(h->ctlr, drv_index, 1, - &total_size, &block_size); - goto geo_inq; - } - - cciss_read_capacity(ctlr, drv_index, 1, - &total_size, &block_size); - - /* if read_capacity returns all F's this volume is >2TB in size */ - /* so we switch to 16-byte CDB's for all read/write ops */ - if (total_size == 0xFFFFFFFFULL) { - cciss_read_capacity_16(ctlr, drv_index, 1, - &total_size, &block_size); - h->cciss_read = CCISS_READ_16; - h->cciss_write = CCISS_WRITE_16; - } else { - h->cciss_read = CCISS_READ_10; - h->cciss_write = CCISS_WRITE_10; - } -geo_inq: - cciss_geometry_inquiry(ctlr, drv_index, 1, total_size, block_size, - inq_buff, &h->drv[drv_index]); + /* Save the new information from cciss_geometry_inquiry + * and serial number inquiry. + */ + h->drv[drv_index].block_size = drvinfo->block_size; + h->drv[drv_index].nr_blocks = drvinfo->nr_blocks; + h->drv[drv_index].heads = drvinfo->heads; + h->drv[drv_index].sectors = drvinfo->sectors; + h->drv[drv_index].cylinders = drvinfo->cylinders; + h->drv[drv_index].raid_level = drvinfo->raid_level; + memcpy(h->drv[drv_index].serial_no, drvinfo->serial_no, 16); ++h->num_luns; disk = h->gendisk[drv_index]; set_capacity(disk, h->drv[drv_index].nr_blocks); - /* if it's the controller it's already added */ - if (drv_index) { - disk->queue = blk_init_queue(do_cciss_request, &h->lock); - sprintf(disk->disk_name, "cciss/c%dd%d", ctlr, drv_index); - disk->major = h->major; - disk->first_minor = drv_index << NWD_SHIFT; - disk->fops = &cciss_fops; - disk->private_data = &h->drv[drv_index]; - - /* Set up queue information */ - blk_queue_bounce_limit(disk->queue, hba[ctlr]->pdev->dma_mask); - - /* This is a hardware imposed limit. */ - blk_queue_max_hw_segments(disk->queue, MAXSGENTRIES); - - /* This is a limit in the driver and could be eliminated. */ - blk_queue_max_phys_segments(disk->queue, MAXSGENTRIES); - - blk_queue_max_sectors(disk->queue, h->cciss_max_sectors); - - blk_queue_softirq_done(disk->queue, cciss_softirq_done); - - disk->queue->queuedata = hba[ctlr]; - - blk_queue_hardsect_size(disk->queue, - hba[ctlr]->drv[drv_index].block_size); - - /* Make sure all queue data is written out before */ - /* setting h->drv[drv_index].queue, as setting this */ - /* allows the interrupt handler to start the queue */ - wmb(); - h->drv[drv_index].queue = disk->queue; - add_disk(disk); - } + /* If it's not disk 0 (drv_index != 0) + * or if it was disk 0, but there was previously + * no actual corresponding configured logical drive + * (raid_leve == -1) then we want to update the + * logical drive's information. + */ + if (drv_index || first_time) + cciss_add_disk(h, disk, drv_index); - freeret: +freeret: kfree(inq_buff); + kfree(drvinfo); return; - mem_msg: +mem_msg: printk(KERN_ERR "cciss: out of memory\n"); goto freeret; } @@ -1448,21 +1533,91 @@ geo_inq: * where new drives will be added. If the index to be returned is greater * than the highest_lun index for the controller then highest_lun is set * to this new index. If there are no available indexes then -1 is returned. + * "controller_node" is used to know if this is a real logical drive, or just + * the controller node, which determines if this counts towards highest_lun. */ -static int cciss_find_free_drive_index(int ctlr) +static int cciss_find_free_drive_index(int ctlr, int controller_node) { int i; for (i = 0; i < CISS_MAX_LUN; i++) { if (hba[ctlr]->drv[i].raid_level == -1) { if (i > hba[ctlr]->highest_lun) - hba[ctlr]->highest_lun = i; + if (!controller_node) + hba[ctlr]->highest_lun = i; return i; } } return -1; } +/* cciss_add_gendisk finds a free hba[]->drv structure + * and allocates a gendisk if needed, and sets the lunid + * in the drvinfo structure. It returns the index into + * the ->drv[] array, or -1 if none are free. + * is_controller_node indicates whether highest_lun should + * count this disk, or if it's only being added to provide + * a means to talk to the controller in case no logical + * drives have yet been configured. + */ +static int cciss_add_gendisk(ctlr_info_t *h, __u32 lunid, int controller_node) +{ + int drv_index; + + drv_index = cciss_find_free_drive_index(h->ctlr, controller_node); + if (drv_index == -1) + return -1; + /*Check if the gendisk needs to be allocated */ + if (!h->gendisk[drv_index]) { + h->gendisk[drv_index] = + alloc_disk(1 << NWD_SHIFT); + if (!h->gendisk[drv_index]) { + printk(KERN_ERR "cciss%d: could not " + "allocate a new disk %d\n", + h->ctlr, drv_index); + return -1; + } + } + h->drv[drv_index].LunID = lunid; + + /* Don't need to mark this busy because nobody */ + /* else knows about this disk yet to contend */ + /* for access to it. */ + h->drv[drv_index].busy_configuring = 0; + wmb(); + return drv_index; +} + +/* This is for the special case of a controller which + * has no logical drives. In this case, we still need + * to register a disk so the controller can be accessed + * by the Array Config Utility. + */ +static void cciss_add_controller_node(ctlr_info_t *h) +{ + struct gendisk *disk; + int drv_index; + + if (h->gendisk[0] != NULL) /* already did this? Then bail. */ + return; + + drv_index = cciss_add_gendisk(h, 0, 1); + if (drv_index == -1) { + printk(KERN_WARNING "cciss%d: could not " + "add disk 0.\n", h->ctlr); + return; + } + h->drv[drv_index].block_size = 512; + h->drv[drv_index].nr_blocks = 0; + h->drv[drv_index].heads = 0; + h->drv[drv_index].sectors = 0; + h->drv[drv_index].cylinders = 0; + h->drv[drv_index].raid_level = -1; + memset(h->drv[drv_index].serial_no, 0, 16); + disk = h->gendisk[drv_index]; + cciss_add_disk(h, disk, drv_index); +} + /* This function will add and remove logical drives from the Logical * drive array of the controller and maintain persistency of ordering * so that mount points are preserved until the next reboot. This allows @@ -1470,15 +1625,12 @@ static int cciss_find_free_drive_index(int ctlr) * without a re-ordering of those drives. * INPUT * h = The controller to perform the operations on - * del_disk = The disk to remove if specified. If the value given - * is NULL then no disk is removed. */ -static int rebuild_lun_table(ctlr_info_t *h, struct gendisk *del_disk) +static int rebuild_lun_table(ctlr_info_t *h, int first_time) { int ctlr = h->ctlr; int num_luns; ReportLunData_struct *ld_buff = NULL; - drive_info_struct *drv = NULL; int return_code; int listlength = 0; int i; @@ -1487,6 +1639,9 @@ static int rebuild_lun_table(ctlr_info_t *h, struct gendisk *del_disk) __u32 lunid = 0; unsigned long flags; + if (!capable(CAP_SYS_RAWIO)) + return -EPERM; + /* Set busy_configuring flag for this operation */ spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); if (h->busy_configuring) { @@ -1494,100 +1649,100 @@ static int rebuild_lun_table(ctlr_info_t *h, struct gendisk *del_disk) return -EBUSY; } h->busy_configuring = 1; + spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); - /* if del_disk is NULL then we are being called to add a new disk - * and update the logical drive table. If it is not NULL then - * we will check if the disk is in use or not. - */ - if (del_disk != NULL) { - drv = get_drv(del_disk); - drv->busy_configuring = 1; - spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); - return_code = deregister_disk(del_disk, drv, 1); - drv->busy_configuring = 0; - h->busy_configuring = 0; - return return_code; - } else { - spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); - if (!capable(CAP_SYS_RAWIO)) - return -EPERM; + ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL); + if (ld_buff == NULL) + goto mem_msg; - ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL); - if (ld_buff == NULL) - goto mem_msg; - - return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff, - sizeof(ReportLunData_struct), 0, - 0, 0, TYPE_CMD); - - if (return_code == IO_OK) { - listlength = - be32_to_cpu(*(__be32 *) ld_buff->LUNListLength); - } else { /* reading number of logical volumes failed */ - printk(KERN_WARNING "cciss: report logical volume" - " command failed\n"); - listlength = 0; - goto freeret; - } + return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff, + sizeof(ReportLunData_struct), 0, + 0, 0, TYPE_CMD); - num_luns = listlength / 8; /* 8 bytes per entry */ - if (num_luns > CISS_MAX_LUN) { - num_luns = CISS_MAX_LUN; - printk(KERN_WARNING "cciss: more luns configured" - " on controller than can be handled by" - " this driver.\n"); + if (return_code == IO_OK) + listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength); + else { /* reading number of logical volumes failed */ + printk(KERN_WARNING "cciss: report logical volume" + " command failed\n"); + listlength = 0; + goto freeret; + } + + num_luns = listlength / 8; /* 8 bytes per entry */ + if (num_luns > CISS_MAX_LUN) { + num_luns = CISS_MAX_LUN; + printk(KERN_WARNING "cciss: more luns configured" + " on controller than can be handled by" + " this driver.\n"); + } + + if (num_luns == 0) + cciss_add_controller_node(h); + + /* Compare controller drive array to driver's drive array + * to see if any drives are missing on the controller due + * to action of Array Config Utility (user deletes drive) + * and deregister logical drives which have disappeared. + */ + for (i = 0; i <= h->highest_lun; i++) { + int j; + drv_found = 0; + for (j = 0; j < num_luns; j++) { + memcpy(&lunid, &ld_buff->LUN[j][0], 4); + lunid = le32_to_cpu(lunid); + if (h->drv[i].LunID == lunid) { + drv_found = 1; + break; + } } + if (!drv_found) { + /* Deregister it from the OS, it's gone. */ + spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); + h->drv[i].busy_configuring = 1; + spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); + return_code = deregister_disk(h->gendisk[i], + &h->drv[i], 1); + h->drv[i].busy_configuring = 0; + } + } + + /* Compare controller drive array to driver's drive array. + * Check for updates in the drive information and any new drives + * on the controller due to ACU adding logical drives, or changing + * a logical drive's size, etc. Reregister any new/changed drives + */ + for (i = 0; i < num_luns; i++) { + int j; - /* Compare controller drive array to drivers drive array. - * Check for updates in the drive information and any new drives - * on the controller. + drv_found = 0; + + memcpy(&lunid, &ld_buff->LUN[i][0], 4); + lunid = le32_to_cpu(lunid); + + /* Find if the LUN is already in the drive array + * of the driver. If so then update its info + * if not in use. If it does not exist then find + * the first free index and add it. */ - for (i = 0; i < num_luns; i++) { - int j; - - drv_found = 0; - - lunid = (0xff & - (unsigned int)(ld_buff->LUN[i][3])) << 24; - lunid |= (0xff & - (unsigned int)(ld_buff->LUN[i][2])) << 16; - lunid |= (0xff & - (unsigned int)(ld_buff->LUN[i][1])) << 8; - lunid |= 0xff & (unsigned int)(ld_buff->LUN[i][0]); - - /* Find if the LUN is already in the drive array - * of the controller. If so then update its info - * if not is use. If it does not exist then find - * the first free index and add it. - */ - for (j = 0; j <= h->highest_lun; j++) { - if (h->drv[j].LunID == lunid) { - drv_index = j; - drv_found = 1; - } + for (j = 0; j <= h->highest_lun; j++) { + if (h->drv[j].raid_level != -1 && + h->drv[j].LunID == lunid) { + drv_index = j; + drv_found = 1; + break; } + } - /* check if the drive was found already in the array */ - if (!drv_found) { - drv_index = cciss_find_free_drive_index(ctlr); - if (drv_index == -1) - goto freeret; - - /*Check if the gendisk needs to be allocated */ - if (!h->gendisk[drv_index]){ - h->gendisk[drv_index] = alloc_disk(1 << NWD_SHIFT); - if (!h->gendisk[drv_index]){ - printk(KERN_ERR "cciss: could not allocate new disk %d\n", drv_index); - goto mem_msg; - } - } - } - h->drv[drv_index].LunID = lunid; - cciss_update_drive_info(ctlr, drv_index); - } /* end for */ - } /* end else */ + /* check if the drive was found already in the array */ + if (!drv_found) { + drv_index = cciss_add_gendisk(h, lunid, 0); + if (drv_index == -1) + goto freeret; + } + cciss_update_drive_info(ctlr, drv_index, first_time); + } /* end for */ - freeret: +freeret: kfree(ld_buff); h->busy_configuring = 0; /* We return -1 here to tell the ACU that we have registered/updated @@ -1595,8 +1750,9 @@ static int rebuild_lun_table(ctlr_info_t *h, struct gendisk *del_disk) * additional times. */ return -1; - mem_msg: +mem_msg: printk(KERN_ERR "cciss: out of memory\n"); + h->busy_configuring = 0; goto freeret; } @@ -1652,15 +1808,15 @@ static int deregister_disk(struct gendisk *disk, drive_info_struct *drv, * other than disk 0 we will call put_disk. We do not * do this for disk 0 as we need it to be able to * configure the controller. - */ + */ if (clear_all){ /* This isn't pretty, but we need to find the * disk in our array and NULL our the pointer. * This is so that we will call alloc_disk if * this index is used again later. - */ + */ for (i=0; i < CISS_MAX_LUN; i++){ - if(h->gendisk[i] == disk){ + if (h->gendisk[i] == disk) { h->gendisk[i] = NULL; break; } @@ -1688,7 +1844,7 @@ static int deregister_disk(struct gendisk *disk, drive_info_struct *drv, if (drv == h->drv + h->highest_lun) { /* if so, find the new hightest lun */ int i, newhighest = -1; - for (i = 0; i < h->highest_lun; i++) { + for (i = 0; i <= h->highest_lun; i++) { /* if the disk has size > 0, it is available */ if (h->drv[i].heads) newhighest = i; @@ -3199,136 +3355,9 @@ err_out_free_res: return err; } -/* - * Gets information about the local volumes attached to the controller. +/* Function to find the first free pointer into our hba[] array + * Returns -1 if no free entries are left. */ -static void cciss_getgeometry(int cntl_num) -{ - ReportLunData_struct *ld_buff; - InquiryData_struct *inq_buff; - int return_code; - int i; - int listlength = 0; - __u32 lunid = 0; - unsigned block_size; - sector_t total_size; - - ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL); - if (ld_buff == NULL) { - printk(KERN_ERR "cciss: out of memory\n"); - return; - } - inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL); - if (inq_buff == NULL) { - printk(KERN_ERR "cciss: out of memory\n"); - kfree(ld_buff); - return; - } - /* Get the firmware version */ - return_code = sendcmd(CISS_INQUIRY, cntl_num, inq_buff, - sizeof(InquiryData_struct), 0, 0, 0, NULL, - TYPE_CMD); - if (return_code == IO_OK) { - hba[cntl_num]->firm_ver[0] = inq_buff->data_byte[32]; - hba[cntl_num]->firm_ver[1] = inq_buff->data_byte[33]; - hba[cntl_num]->firm_ver[2] = inq_buff->data_byte[34]; - hba[cntl_num]->firm_ver[3] = inq_buff->data_byte[35]; - } else { /* send command failed */ - - printk(KERN_WARNING "cciss: unable to determine firmware" - " version of controller\n"); - } - /* Get the number of logical volumes */ - return_code = sendcmd(CISS_REPORT_LOG, cntl_num, ld_buff, - sizeof(ReportLunData_struct), 0, 0, 0, NULL, - TYPE_CMD); - - if (return_code == IO_OK) { -#ifdef CCISS_DEBUG - printk("LUN Data\n--------------------------\n"); -#endif /* CCISS_DEBUG */ - - listlength |= - (0xff & (unsigned int)(ld_buff->LUNListLength[0])) << 24; - listlength |= - (0xff & (unsigned int)(ld_buff->LUNListLength[1])) << 16; - listlength |= - (0xff & (unsigned int)(ld_buff->LUNListLength[2])) << 8; - listlength |= 0xff & (unsigned int)(ld_buff->LUNListLength[3]); - } else { /* reading number of logical volumes failed */ - - printk(KERN_WARNING "cciss: report logical volume" - " command failed\n"); - listlength = 0; - } - hba[cntl_num]->num_luns = listlength / 8; // 8 bytes pre entry - if (hba[cntl_num]->num_luns > CISS_MAX_LUN) { - printk(KERN_ERR - "ciss: only %d number of logical volumes supported\n", - CISS_MAX_LUN); - hba[cntl_num]->num_luns = CISS_MAX_LUN; - } -#ifdef CCISS_DEBUG - printk(KERN_DEBUG "Length = %x %x %x %x = %d\n", - ld_buff->LUNListLength[0], ld_buff->LUNListLength[1], - ld_buff->LUNListLength[2], ld_buff->LUNListLength[3], - hba[cntl_num]->num_luns); -#endif /* CCISS_DEBUG */ - - hba[cntl_num]->highest_lun = hba[cntl_num]->num_luns - 1; - for (i = 0; i < CISS_MAX_LUN; i++) { - if (i < hba[cntl_num]->num_luns) { - lunid = (0xff & (unsigned int)(ld_buff->LUN[i][3])) - << 24; - lunid |= (0xff & (unsigned int)(ld_buff->LUN[i][2])) - << 16; - lunid |= (0xff & (unsigned int)(ld_buff->LUN[i][1])) - << 8; - lunid |= 0xff & (unsigned int)(ld_buff->LUN[i][0]); - - hba[cntl_num]->drv[i].LunID = lunid; - -#ifdef CCISS_DEBUG - printk(KERN_DEBUG "LUN[%d]: %x %x %x %x = %x\n", i, - ld_buff->LUN[i][0], ld_buff->LUN[i][1], - ld_buff->LUN[i][2], ld_buff->LUN[i][3], - hba[cntl_num]->drv[i].LunID); -#endif /* CCISS_DEBUG */ - - /* testing to see if 16-byte CDBs are already being used */ - if(hba[cntl_num]->cciss_read == CCISS_READ_16) { - cciss_read_capacity_16(cntl_num, i, 0, - &total_size, &block_size); - goto geo_inq; - } - cciss_read_capacity(cntl_num, i, 0, &total_size, &block_size); - - /* If read_capacity returns all F's the logical is >2TB */ - /* so we switch to 16-byte CDBs for all read/write ops */ - if(total_size == 0xFFFFFFFFULL) { - cciss_read_capacity_16(cntl_num, i, 0, - &total_size, &block_size); - hba[cntl_num]->cciss_read = CCISS_READ_16; - hba[cntl_num]->cciss_write = CCISS_WRITE_16; - } else { - hba[cntl_num]->cciss_read = CCISS_READ_10; - hba[cntl_num]->cciss_write = CCISS_WRITE_10; - } -geo_inq: - cciss_geometry_inquiry(cntl_num, i, 0, total_size, - block_size, inq_buff, - &hba[cntl_num]->drv[i]); - } else { - /* initialize raid_level to indicate a free space */ - hba[cntl_num]->drv[i].raid_level = -1; - } - } - kfree(ld_buff); - kfree(inq_buff); -} - -/* Function to find the first free pointer into our hba[] array */ -/* Returns -1 if no free entries are left. */ static int alloc_cciss_hba(void) { int i; @@ -3340,11 +3369,6 @@ static int alloc_cciss_hba(void) p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL); if (!p) goto Enomem; - p->gendisk[0] = alloc_disk(1 << NWD_SHIFT); - if (!p->gendisk[0]) { - kfree(p); - goto Enomem; - } hba[i] = p; return i; } @@ -3472,11 +3496,13 @@ static int __devinit cciss_init_one(struct pci_dev *pdev, ((hba[i]->nr_cmds + BITS_PER_LONG - 1) / BITS_PER_LONG) * sizeof(unsigned long)); -#ifdef CCISS_DEBUG - printk(KERN_DEBUG "Scanning for drives on controller cciss%d\n", i); -#endif /* CCISS_DEBUG */ - - cciss_getgeometry(i); + hba[i]->num_luns = 0; + hba[i]->highest_lun = -1; + for (j = 0; j < CISS_MAX_LUN; j++) { + hba[i]->drv[j].raid_level = -1; + hba[i]->drv[j].queue = NULL; + hba[i]->gendisk[j] = NULL; + } cciss_scsi_setup(i); @@ -3489,76 +3515,10 @@ static int __devinit cciss_init_one(struct pci_dev *pdev, hba[i]->busy_initializing = 0; - do { - drive_info_struct *drv = &(hba[i]->drv[j]); - struct gendisk *disk = hba[i]->gendisk[j]; - struct request_queue *q; - - /* Check if the disk was allocated already */ - if (!disk){ - hba[i]->gendisk[j] = alloc_disk(1 << NWD_SHIFT); - disk = hba[i]->gendisk[j]; - } - - /* Check that the disk was able to be allocated */ - if (!disk) { - printk(KERN_ERR "cciss: unable to allocate memory for disk %d\n", j); - goto clean4; - } - - q = blk_init_queue(do_cciss_request, &hba[i]->lock); - if (!q) { - printk(KERN_ERR - "cciss: unable to allocate queue for disk %d\n", - j); - goto clean4; - } - drv->queue = q; - - blk_queue_bounce_limit(q, hba[i]->pdev->dma_mask); - - /* This is a hardware imposed limit. */ - blk_queue_max_hw_segments(q, MAXSGENTRIES); - - /* This is a limit in the driver and could be eliminated. */ - blk_queue_max_phys_segments(q, MAXSGENTRIES); - - blk_queue_max_sectors(q, hba[i]->cciss_max_sectors); - - blk_queue_softirq_done(q, cciss_softirq_done); - - q->queuedata = hba[i]; - sprintf(disk->disk_name, "cciss/c%dd%d", i, j); - disk->major = hba[i]->major; - disk->first_minor = j << NWD_SHIFT; - disk->fops = &cciss_fops; - disk->queue = q; - disk->private_data = drv; - disk->driverfs_dev = &pdev->dev; - /* we must register the controller even if no disks exist */ - /* this is for the online array utilities */ - if (!drv->heads && j) - continue; - blk_queue_hardsect_size(q, drv->block_size); - set_capacity(disk, drv->nr_blocks); - j++; - } while (j <= hba[i]->highest_lun); - - /* Make sure all queue data is written out before */ - /* interrupt handler, triggered by add_disk, */ - /* is allowed to start them. */ - wmb(); - - for (j = 0; j <= hba[i]->highest_lun; j++) - add_disk(hba[i]->gendisk[j]); - - /* we must register the controller even if no disks exist */ - if (hba[i]->highest_lun == -1) - add_disk(hba[i]->gendisk[0]); - + rebuild_lun_table(hba[i], 1); return 1; - clean4: +clean4: #ifdef CONFIG_CISS_SCSI_TAPE kfree(hba[i]->scsi_rejects.complete); #endif @@ -3573,9 +3533,9 @@ static int __devinit cciss_init_one(struct pci_dev *pdev, hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle); free_irq(hba[i]->intr[SIMPLE_MODE_INT], hba[i]); - clean2: +clean2: unregister_blkdev(hba[i]->major, hba[i]->devname); - clean1: +clean1: hba[i]->busy_initializing = 0; /* cleanup any queues that may have been initialized */ for (j=0; j <= hba[i]->highest_lun; j++){ @@ -3654,7 +3614,9 @@ static void __devexit cciss_remove_one(struct pci_dev *pdev) } } +#ifdef CONFIG_CISS_SCSI_TAPE cciss_unregister_scsi(i); /* unhook from SCSI subsystem */ +#endif cciss_shutdown(pdev); diff --git a/drivers/block/cciss.h b/drivers/block/cciss.h index b70988dd33ec..24a7efa993ab 100644 --- a/drivers/block/cciss.h +++ b/drivers/block/cciss.h @@ -39,6 +39,8 @@ typedef struct _drive_info_struct *to prevent it from being opened or it's queue *from being started. */ + __u8 serial_no[16]; /* from inquiry page 0x83, */ + /* not necc. null terminated. */ } drive_info_struct; #ifdef CONFIG_CISS_SCSI_TAPE diff --git a/drivers/block/cciss_scsi.c b/drivers/block/cciss_scsi.c index e4bf9a11ca0d..e1233aabda77 100644 --- a/drivers/block/cciss_scsi.c +++ b/drivers/block/cciss_scsi.c @@ -358,23 +358,68 @@ find_bus_target_lun(int ctlr, int *bus, int *target, int *lun) } return (!found); } +struct scsi2map { + char scsi3addr[8]; + int bus, target, lun; +}; static int cciss_scsi_add_entry(int ctlr, int hostno, - unsigned char *scsi3addr, int devtype) + unsigned char *scsi3addr, int devtype, + struct scsi2map *added, int *nadded) { /* assumes hba[ctlr]->scsi_ctlr->lock is held */ int n = ccissscsi[ctlr].ndevices; struct cciss_scsi_dev_t *sd; + int i, bus, target, lun; + unsigned char addr1[8], addr2[8]; if (n >= CCISS_MAX_SCSI_DEVS_PER_HBA) { printk("cciss%d: Too many devices, " "some will be inaccessible.\n", ctlr); return -1; } + + bus = target = -1; + lun = 0; + /* Is this device a non-zero lun of a multi-lun device */ + /* byte 4 of the 8-byte LUN addr will contain the logical unit no. */ + if (scsi3addr[4] != 0) { + /* Search through our list and find the device which */ + /* has the same 8 byte LUN address, excepting byte 4. */ + /* Assign the same bus and target for this new LUN. */ + /* Use the logical unit number from the firmware. */ + memcpy(addr1, scsi3addr, 8); + addr1[4] = 0; + for (i = 0; i < n; i++) { + sd = &ccissscsi[ctlr].dev[i]; + memcpy(addr2, sd->scsi3addr, 8); + addr2[4] = 0; + /* differ only in byte 4? */ + if (memcmp(addr1, addr2, 8) == 0) { + bus = sd->bus; + target = sd->target; + lun = scsi3addr[4]; + break; + } + } + } + sd = &ccissscsi[ctlr].dev[n]; - if (find_bus_target_lun(ctlr, &sd->bus, &sd->target, &sd->lun) != 0) - return -1; + if (lun == 0) { + if (find_bus_target_lun(ctlr, + &sd->bus, &sd->target, &sd->lun) != 0) + return -1; + } else { + sd->bus = bus; + sd->target = target; + sd->lun = lun; + } + added[*nadded].bus = sd->bus; + added[*nadded].target = sd->target; + added[*nadded].lun = sd->lun; + (*nadded)++; + memcpy(&sd->scsi3addr[0], scsi3addr, 8); sd->devtype = devtype; ccissscsi[ctlr].ndevices++; @@ -390,7 +435,8 @@ cciss_scsi_add_entry(int ctlr, int hostno, } static void -cciss_scsi_remove_entry(int ctlr, int hostno, int entry) +cciss_scsi_remove_entry(int ctlr, int hostno, int entry, + struct scsi2map *removed, int *nremoved) { /* assumes hba[ctlr]->scsi_ctlr->lock is held */ int i; @@ -398,6 +444,10 @@ cciss_scsi_remove_entry(int ctlr, int hostno, int entry) if (entry < 0 || entry >= CCISS_MAX_SCSI_DEVS_PER_HBA) return; sd = ccissscsi[ctlr].dev[entry]; + removed[*nremoved].bus = sd.bus; + removed[*nremoved].target = sd.target; + removed[*nremoved].lun = sd.lun; + (*nremoved)++; for (i=entry;i<ccissscsi[ctlr].ndevices-1;i++) ccissscsi[ctlr].dev[i] = ccissscsi[ctlr].dev[i+1]; ccissscsi[ctlr].ndevices--; @@ -417,6 +467,26 @@ cciss_scsi_remove_entry(int ctlr, int hostno, int entry) (a)[1] == (b)[1] && \ (a)[0] == (b)[0]) +static void fixup_botched_add(int ctlr, char *scsi3addr) +{ + /* called when scsi_add_device fails in order to re-adjust */ + /* ccissscsi[] to match the mid layer's view. */ + unsigned long flags; + int i, j; + CPQ_TAPE_LOCK(ctlr, flags); + for (i = 0; i < ccissscsi[ctlr].ndevices; i++) { + if (memcmp(scsi3addr, + ccissscsi[ctlr].dev[i].scsi3addr, 8) == 0) { + for (j = i; j < ccissscsi[ctlr].ndevices-1; j++) + ccissscsi[ctlr].dev[j] = + ccissscsi[ctlr].dev[j+1]; + ccissscsi[ctlr].ndevices--; + break; + } + } + CPQ_TAPE_UNLOCK(ctlr, flags); +} + static int adjust_cciss_scsi_table(int ctlr, int hostno, struct cciss_scsi_dev_t sd[], int nsds) @@ -429,13 +499,33 @@ adjust_cciss_scsi_table(int ctlr, int hostno, int i,j, found, changes=0; struct cciss_scsi_dev_t *csd; unsigned long flags; + struct scsi2map *added, *removed; + int nadded, nremoved; + struct Scsi_Host *sh = NULL; + + added = kzalloc(sizeof(*added) * CCISS_MAX_SCSI_DEVS_PER_HBA, + GFP_KERNEL); + removed = kzalloc(sizeof(*removed) * CCISS_MAX_SCSI_DEVS_PER_HBA, + GFP_KERNEL); + + if (!added || !removed) { + printk(KERN_WARNING "cciss%d: Out of memory in " + "adjust_cciss_scsi_table\n", ctlr); + goto free_and_out; + } CPQ_TAPE_LOCK(ctlr, flags); + if (hostno != -1) /* if it's not the first time... */ + sh = ((struct cciss_scsi_adapter_data_t *) + hba[ctlr]->scsi_ctlr)->scsi_host; + /* find any devices in ccissscsi[] that are not in sd[] and remove them from ccissscsi[] */ i = 0; + nremoved = 0; + nadded = 0; while(i<ccissscsi[ctlr].ndevices) { csd = &ccissscsi[ctlr].dev[i]; found=0; @@ -455,8 +545,9 @@ adjust_cciss_scsi_table(int ctlr, int hostno, /* printk("cciss%d: %s device c%db%dt%dl%d removed.\n", ctlr, scsi_device_type(csd->devtype), hostno, csd->bus, csd->target, csd->lun); */ - cciss_scsi_remove_entry(ctlr, hostno, i); - /* note, i not incremented */ + cciss_scsi_remove_entry(ctlr, hostno, i, + removed, &nremoved); + /* remove ^^^, hence i not incremented */ } else if (found == 1) { /* device is different kind */ changes++; @@ -464,8 +555,15 @@ adjust_cciss_scsi_table(int ctlr, int hostno, "(device type now %s).\n", ctlr, hostno, csd->bus, csd->target, csd->lun, scsi_device_type(csd->devtype)); + cciss_scsi_remove_entry(ctlr, hostno, i, + removed, &nremoved); + /* remove ^^^, hence i not incremented */ + if (cciss_scsi_add_entry(ctlr, hostno, + &sd[j].scsi3addr[0], sd[j].devtype, + added, &nadded) != 0) + /* we just removed one, so add can't fail. */ + BUG(); csd->devtype = sd[j].devtype; - i++; /* so just move along. */ } else /* device is same as it ever was, */ i++; /* so just move along. */ } @@ -489,7 +587,9 @@ adjust_cciss_scsi_table(int ctlr, int hostno, if (!found) { changes++; if (cciss_scsi_add_entry(ctlr, hostno, - &sd[i].scsi3addr[0], sd[i].devtype) != 0) + + &sd[i].scsi3addr[0], sd[i].devtype, + added, &nadded) != 0) break; } else if (found == 1) { /* should never happen... */ @@ -501,9 +601,50 @@ adjust_cciss_scsi_table(int ctlr, int hostno, } CPQ_TAPE_UNLOCK(ctlr, flags); - if (!changes) - printk("cciss%d: No device changes detected.\n", ctlr); + /* Don't notify scsi mid layer of any changes the first time through */ + /* (or if there are no changes) scsi_scan_host will do it later the */ + /* first time through. */ + if (hostno == -1 || !changes) + goto free_and_out; + + /* Notify scsi mid layer of any removed devices */ + for (i = 0; i < nremoved; i++) { + struct scsi_device *sdev = + scsi_device_lookup(sh, removed[i].bus, + removed[i].target, removed[i].lun); + if (sdev != NULL) { + scsi_remove_device(sdev); + scsi_device_put(sdev); + } else { + /* We don't expect to get here. */ + /* future cmds to this device will get selection */ + /* timeout as if the device was gone. */ + printk(KERN_WARNING "cciss%d: didn't find " + "c%db%dt%dl%d\n for removal.", + ctlr, hostno, removed[i].bus, + removed[i].target, removed[i].lun); + } + } + + /* Notify scsi mid layer of any added devices */ + for (i = 0; i < nadded; i++) { + int rc; + rc = scsi_add_device(sh, added[i].bus, + added[i].target, added[i].lun); + if (rc == 0) + continue; + printk(KERN_WARNING "cciss%d: scsi_add_device " + "c%db%dt%dl%d failed, device not added.\n", + ctlr, hostno, + added[i].bus, added[i].target, added[i].lun); + /* now we have to remove it from ccissscsi, */ + /* since it didn't get added to scsi mid layer */ + fixup_botched_add(ctlr, added[i].scsi3addr); + } +free_and_out: + kfree(added); + kfree(removed); return 0; } @@ -1355,32 +1496,6 @@ cciss_unregister_scsi(int ctlr) } static int -cciss_register_scsi(int ctlr) -{ - unsigned long flags; - - CPQ_TAPE_LOCK(ctlr, flags); - - /* Since this is really a block driver, the SCSI core may not be - initialized at init time, in which case, calling scsi_register_host - would hang. Instead, we do it later, via /proc filesystem - and rc scripts, when we know SCSI core is good to go. */ - - /* Only register if SCSI devices are detected. */ - if (ccissscsi[ctlr].ndevices != 0) { - ((struct cciss_scsi_adapter_data_t *) - hba[ctlr]->scsi_ctlr)->registered = 1; - CPQ_TAPE_UNLOCK(ctlr, flags); - return cciss_scsi_detect(ctlr); - } - CPQ_TAPE_UNLOCK(ctlr, flags); - printk(KERN_INFO - "cciss%d: No appropriate SCSI device detected, " - "SCSI subsystem not engaged.\n", ctlr); - return 0; -} - -static int cciss_engage_scsi(int ctlr) { struct cciss_scsi_adapter_data_t *sa; @@ -1391,15 +1506,15 @@ cciss_engage_scsi(int ctlr) sa = (struct cciss_scsi_adapter_data_t *) hba[ctlr]->scsi_ctlr; stk = &sa->cmd_stack; - if (((struct cciss_scsi_adapter_data_t *) - hba[ctlr]->scsi_ctlr)->registered) { + if (sa->registered) { printk("cciss%d: SCSI subsystem already engaged.\n", ctlr); spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); return ENXIO; } + sa->registered = 1; spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); cciss_update_non_disk_devices(ctlr, -1); - cciss_register_scsi(ctlr); + cciss_scsi_detect(ctlr); return 0; } @@ -1493,7 +1608,5 @@ static int cciss_eh_abort_handler(struct scsi_cmnd *scsicmd) /* If no tape support, then these become defined out of existence */ #define cciss_scsi_setup(cntl_num) -#define cciss_unregister_scsi(ctlr) -#define cciss_register_scsi(ctlr) #endif /* CONFIG_CISS_SCSI_TAPE */ diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c index 9ae05c584234..3ca643cafccd 100644 --- a/drivers/block/xen-blkfront.c +++ b/drivers/block/xen-blkfront.c @@ -154,8 +154,8 @@ static int blkif_getgeo(struct block_device *bd, struct hd_geometry *hg) return 0; } -int blkif_ioctl(struct inode *inode, struct file *filep, - unsigned command, unsigned long argument) +static int blkif_ioctl(struct inode *inode, struct file *filep, + unsigned command, unsigned long argument) { struct blkfront_info *info = inode->i_bdev->bd_disk->private_data; |