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compat_ioctl: scsi: handle HDIO commands from drivers

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The ata_sas_scsi_ioctl() function implements a number of HDIO_* commands
for SCSI devices, it is used by all libata drivers as well as a few
drivers that support SAS attached SATA drives.

The only command that is not safe for compat ioctls here is
HDIO_GET_32BIT. Change the implementation to check for in_compat_syscall()
in order to do both cases correctly, and change all callers to use it
as both native and compat callback pointers, including the indirect
callers through sas_ioctl and ata_scsi_ioctl.

Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Arnd Bergmann 2019-11-30 20:28:12 +01:00
parent 64cbfa9655
commit 75c0b0e118
10 changed files with 39 additions and 0 deletions
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6
include/linux/libata.h
View file

@ -1109,6 +1109,11 @@ extern void ata_host_init(struct ata_host *, struct device *, struct ata_port_op
extern int ata_scsi_detect(struct scsi_host_template *sht);
extern int ata_scsi_ioctl(struct scsi_device *dev, unsigned int cmd,
void __user *arg);
#ifdef CONFIG_COMPAT
#define ATA_SCSI_COMPAT_IOCTL .compat_ioctl = ata_scsi_ioctl,
#else
#define ATA_SCSI_COMPAT_IOCTL /* empty */
#endif
extern int ata_scsi_queuecmd(struct Scsi_Host *h, struct scsi_cmnd *cmd);
extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev,
unsigned int cmd, void __user *arg);
@ -1341,6 +1346,7 @@ extern struct device_attribute *ata_common_sdev_attrs[];
.module = THIS_MODULE, \
.name = drv_name, \
.ioctl = ata_scsi_ioctl, \
ATA_SCSI_COMPAT_IOCTL \
.queuecommand = ata_scsi_queuecmd, \
.can_queue = ATA_DEF_QUEUE, \
.tag_alloc_policy = BLK_TAG_ALLOC_RR, \