drivers/scsi/sd.c

6  *      Linux scsi disk driver
78 MODULE_DESCRIPTION("SCSI disk (sd) driver");
107 static void sd_unlock_native_capacity(struct gendisk *disk);
132 	blk_queue_write_cache(sdkp->disk->queue, wc, fua);
201 	sd_revalidate_disk(sdkp->disk);
672  * Device no to disk mapping:
680  * ones with major1, ... Disk 256 is for major0 again, disk 272
827 	struct request_queue *q = sdkp->disk->queue;
894 	struct scsi_disk *sdkp = scsi_disk(rq->q->disk);
925 	struct scsi_disk *sdkp = scsi_disk(rq->q->disk);
952 	struct scsi_disk *sdkp = scsi_disk(rq->q->disk);
978 	struct scsi_disk *sdkp = scsi_disk(rq->q->disk);
1004 	struct request_queue *q = sdkp->disk->queue;
1065 	struct scsi_disk *sdkp = scsi_disk(rq->q->disk);
1100 	struct scsi_disk *sdkp = scsi_disk(rq->q->disk);
1215 	struct scsi_disk *sdkp = scsi_disk(rq->q->disk);
1237 	if (blk_rq_pos(rq) + blk_rq_sectors(rq) > get_capacity(rq->q->disk)) {
1327 		switch (scsi_disk(rq->q->disk)->provisioning_mode) {
1372 static bool sd_need_revalidate(struct gendisk *disk, struct scsi_disk *sdkp)
1375 		if (disk_check_media_change(disk))
1380 	 * Force a full rescan after ioctl(BLKRRPART).  While the disk state has
1384 	return test_bit(GD_NEED_PART_SCAN, &disk->state);
1388  *	sd_open - open a scsi disk device
1389  *	@disk: disk to open
1400  *	Locking: called with disk->open_mutex held.
1402 static int sd_open(struct gendisk *disk, blk_mode_t mode)
1404 	struct scsi_disk *sdkp = scsi_disk(disk);
1421 	if (sd_need_revalidate(disk, sdkp))
1422 		sd_revalidate_disk(disk);
1441 	 * It is possible that the disk changing stuff resulted in
1464  *	scsi disk.
1465  *	@disk: disk to release
1470  *	on this disk.
1472  *	Locking: called with disk->open_mutex held.
1474 static void sd_release(struct gendisk *disk)
1476 	struct scsi_disk *sdkp = scsi_disk(disk);
1531 	struct gendisk *disk = bdev->bd_disk;
1532 	struct scsi_disk *sdkp = scsi_disk(disk);
1537 	SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO, sdkp, "sd_ioctl: disk=%s, "
1538 				    "cmd=0x%x\n", disk->disk_name, cmd));
1591  *	@disk: kernel device descriptor
1592  *	@clearing: disk events currently being cleared
1598 static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing)
1600 	struct scsi_disk *sdkp = disk->private_data;
1648 	 * For removable scsi disk we have to recognise the presence
1649 	 * of a disk in the drive.
1745 	sd_revalidate_disk(sdkp->disk);
1748 static int sd_get_unique_id(struct gendisk *disk, u8 id[16],
1751 	struct scsi_device *sdev = scsi_disk(disk)->device;
2018 static void scsi_disk_free_disk(struct gendisk *disk)
2020 	struct scsi_disk *sdkp = scsi_disk(disk);
2054 	struct scsi_disk *sdkp = scsi_disk(scsi_cmd_to_rq(scmd)->q->disk);
2074 	struct scsi_disk *sdkp = scsi_disk(scsi_cmd_to_rq(scmd)->q->disk);
2102 			    "Medium access timeout failure. Offlining disk!\n");
2122 	 * block size (e.g. INQUIRY on a 4K disk).
2171 	struct scsi_disk *sdkp = scsi_disk(req->q->disk);
2280  * spinup disk - called only in sd_revalidate_disk()
2389 				sd_printk(KERN_NOTICE, sdkp, "Spinning up disk...");
2436  * Determine whether disk supports Data Integrity Field.
2452 			  " protection type %u. Disabling disk!\n",
2701  * read disk capacity
2800  * Print disk capacity
2857 	set_disk_ro(sdkp->disk, 0);
2895 		set_disk_ro(sdkp->disk, sdkp->write_prot);
3195  * sd_read_block_limits - Query disk device for preferred I/O sizes.
3196  * @sdkp: disk to query
3269  * @sdkp: disk to query
3273 	struct request_queue *q = sdkp->disk->queue;
3300 		disk_set_zoned(sdkp->disk);
3322 		sd_printk(KERN_NOTICE, sdkp, "Host-aware SMR disk used as regular disk\n");
3324 		sd_printk(KERN_NOTICE, sdkp, "Drive-managed SMR disk\n");
3329  * @sdkp: disk to query
3407  * @sdkp:	disk to query
3450 	iars = disk_alloc_independent_access_ranges(sdkp->disk, nr_cpr);
3470 	disk_set_independent_access_ranges(sdkp->disk, iars);
3585  *	sd_revalidate_disk - called the first time a new disk is seen,
3586  *	performs disk spin up, read_capacity, etc.
3587  *	@disk: struct gendisk we care about
3589 static int sd_revalidate_disk(struct gendisk *disk)
3591 	struct scsi_disk *sdkp = scsi_disk(disk);
3593 	struct request_queue *q = sdkp->disk->queue;
3673 		blk_queue_io_min(sdkp->disk->queue,
3676 		blk_queue_io_min(sdkp->disk->queue, 0);
3708 	set_capacity_and_notify(disk, logical_to_sectors(sdp, sdkp->capacity));
3718 		set_capacity_and_notify(disk, 0);
3726  *	@disk: struct gendisk to set capacity for
3729  *	on @disk reach beyond the end of the device.  If the SCSI host
3736 static void sd_unlock_native_capacity(struct gendisk *disk)
3738 	struct scsi_device *sdev = scsi_disk(disk)->device;
3745  *	sd_format_disk_name - format disk name
3747  *	@index: index of the disk to format name for
3751  *	SCSI disk names starts at sda.  The 26th device is sdz and the
3851 		sdev_printk(KERN_WARNING, sdp, "SCSI disk (sd) name length exceeded.\n");
3856 	sdkp->disk = gd;
3947  *	sd_remove - called whenever a scsi disk (previously recognized by
3964 	del_gendisk(sdkp->disk);
3968 	put_disk(sdkp->disk);
4046 		sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n");
4079 			sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n");
4109 	sd_printk(KERN_NOTICE, sdkp, "Starting disk\n");
4132 	sd_printk(KERN_NOTICE, sdkp, "Starting disk\n");
4285 			     sdkp->disk ? sdkp->disk->disk_name : NULL, sshdr);