From 5924b74c1cde5ef0246cf0dfbe689b27ffbe815b Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Tue, 2 Jan 2007 20:20:07 +0900 Subject: [PATCH] libata: implement HDIO_GET_IDENTITY 'hdparm -I' doesn't work with ATAPI devices and sg_sat is not widely spread yet leaving no easy way to access ATAPI IDENTIFY data. Implement HDIO_GET_IDENTITY such that at least 'hdparm -i' works. Signed-off-by: Tejun Heo Signed-off-by: Jeff Garzik --- drivers/ata/libata-scsi.c | 43 ++++++++++++++++++++++++++++++++++++++- 1 file changed, 42 insertions(+), 1 deletion(-) diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index 9b5088ab27..cc229e3143 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -148,6 +148,45 @@ int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, return 0; } +/** + * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl + * @sdev: SCSI device to get identify data for + * @arg: User buffer area for identify data + * + * LOCKING: + * Defined by the SCSI layer. We don't really care. + * + * RETURNS: + * Zero on success, negative errno on error. + */ +static int ata_get_identity(struct scsi_device *sdev, void __user *arg) +{ + struct ata_port *ap = ata_shost_to_port(sdev->host); + struct ata_device *dev = ata_scsi_find_dev(ap, sdev); + u16 __user *dst = arg; + char buf[40]; + + if (!dev) + return -ENOMSG; + + if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16))) + return -EFAULT; + + ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN); + if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN)) + return -EFAULT; + + ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN); + if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN)) + return -EFAULT; + + ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN); + if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN)) + return -EFAULT; + + return 0; +} + /** * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl * @scsidev: Device to which we are issuing command @@ -159,7 +198,6 @@ int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, * RETURNS: * Zero on success, negative errno on error. */ - int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) { int rc = 0; @@ -359,6 +397,9 @@ int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg) return -EINVAL; return 0; + case HDIO_GET_IDENTITY: + return ata_get_identity(scsidev, arg); + case HDIO_DRIVE_CMD: if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) return -EACCES; -- 2.39.5