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block: Switch struct packet_command to use struct scsi_sense_hdr

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There is a lot of needless struct request_sense usage in the CDROM
code. These can all be struct scsi_sense_hdr instead, to avoid any
confusion over their respective structure sizes. This patch is a lot
of noise changing "sense" to "sshdr", but the final code is more
readable to distinguish between "sense" meaning "struct request_sense"
and "sshdr" meaning "struct scsi_sense_hdr".

Reviewed-by: Christoph Hellwig <[email protected]>
Signed-off-by: Kees Cook <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Kees Cook 2018-08-02 15:22:13 -06:00 • committed by Jens Axboe
commit e7d0748dd7
7 changed files with 63 additions and 65 deletions
Download patch file Download diff file Expand all files Collapse all files

11
drivers/ide/ide-cd.c
View file

@ -419,7 +419,7 @@ static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
int write, void *buffer, unsigned *bufflen,
struct request_sense *sense, int timeout,
struct scsi_sense_hdr *sshdr, int timeout,
req_flags_t rq_flags)
{
struct cdrom_info *info = drive->driver_data;
@ -456,8 +456,9 @@ int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
if (buffer)
*bufflen = scsi_req(rq)->resid_len;
if (sense)
memcpy(sense, scsi_req(rq)->sense, sizeof(*sense));
if (sshdr)
scsi_normalize_sense(scsi_req(rq)->sense,
scsi_req(rq)->sense_len, sshdr);
/*
* FIXME: we should probably abort/retry or something in case of
@ -864,7 +865,7 @@ static void msf_from_bcd(struct atapi_msf *msf)
msf->frame = bcd2bin(msf->frame);
}
int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
int cdrom_check_status(ide_drive_t *drive, struct scsi_sense_hdr *sshdr)
{
struct cdrom_info *info = drive->driver_data;
struct cdrom_device_info *cdi;
@ -886,7 +887,7 @@ int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
*/
cmd[7] = cdi->sanyo_slot % 3;
return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, RQF_QUIET);
return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sshdr, 0, RQF_QUIET);
}
static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,

4
drivers/ide/ide-cd.h
View file

@ -98,11 +98,11 @@ void ide_cd_log_error(const char *, struct request *, struct request_sense *);
/* ide-cd.c functions used by ide-cd_ioctl.c */
int ide_cd_queue_pc(ide_drive_t *, const unsigned char *, int, void *,
unsigned *, struct request_sense *, int, req_flags_t);
unsigned *, struct scsi_sense_hdr *, int, req_flags_t);
int ide_cd_read_toc(ide_drive_t *);
int ide_cdrom_get_capabilities(ide_drive_t *, u8 *);
void ide_cdrom_update_speed(ide_drive_t *, u8 *);
int cdrom_check_status(ide_drive_t *, struct request_sense *);
int cdrom_check_status(ide_drive_t *, struct scsi_sense_hdr *);
/* ide-cd_ioctl.c */
int ide_cdrom_open_real(struct cdrom_device_info *, int);

30
drivers/ide/ide-cd_ioctl.c
View file

@ -43,14 +43,14 @@ int ide_cdrom_drive_status(struct cdrom_device_info *cdi, int slot_nr)
{
ide_drive_t *drive = cdi->handle;
struct media_event_desc med;
struct request_sense sense;
struct scsi_sense_hdr sshdr;
int stat;
if (slot_nr != CDSL_CURRENT)
return -EINVAL;
stat = cdrom_check_status(drive, &sense);
if (!stat || sense.sense_key == UNIT_ATTENTION)
stat = cdrom_check_status(drive, &sshdr);
if (!stat || sshdr.sense_key == UNIT_ATTENTION)
return CDS_DISC_OK;
if (!cdrom_get_media_event(cdi, &med)) {
@ -62,8 +62,8 @@ int ide_cdrom_drive_status(struct cdrom_device_info *cdi, int slot_nr)
return CDS_NO_DISC;
}
if (sense.sense_key == NOT_READY && sense.asc == 0x04
&& sense.ascq == 0x04)
if (sshdr.sense_key == NOT_READY && sshdr.asc == 0x04
&& sshdr.ascq == 0x04)
return CDS_DISC_OK;
/*
@ -71,8 +71,8 @@ int ide_cdrom_drive_status(struct cdrom_device_info *cdi, int slot_nr)
* just return TRAY_OPEN since ATAPI doesn't provide
* any other way to detect this...
*/
if (sense.sense_key == NOT_READY) {
if (sense.asc == 0x3a && sense.ascq == 1)
if (sshdr.sense_key == NOT_READY) {
if (sshdr.asc == 0x3a && sshdr.ascq == 1)
return CDS_NO_DISC;
else
return CDS_TRAY_OPEN;
@ -135,7 +135,7 @@ int cdrom_eject(ide_drive_t *drive, int ejectflag)
static
int ide_cd_lockdoor(ide_drive_t *drive, int lockflag)
{
struct request_sense my_sense, *sense = &my_sense;
struct scsi_sense_hdr sshdr;
int stat;
/* If the drive cannot lock the door, just pretend. */
@ -150,14 +150,14 @@ int ide_cd_lockdoor(ide_drive_t *drive, int lockflag)
cmd[4] = lockflag ? 1 : 0;
stat = ide_cd_queue_pc(drive, cmd, 0, NULL, NULL,
sense, 0, 0);
&sshdr, 0, 0);
}
/* If we got an illegal field error, the drive
probably cannot lock the door. */
if (stat != 0 &&
sense->sense_key == ILLEGAL_REQUEST &&
(sense->asc == 0x24 || sense->asc == 0x20)) {
sshdr.sense_key == ILLEGAL_REQUEST &&
(sshdr.asc == 0x24 || sshdr.asc == 0x20)) {
printk(KERN_ERR "%s: door locking not supported\n",
drive->name);
drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
@ -165,7 +165,7 @@ int ide_cd_lockdoor(ide_drive_t *drive, int lockflag)
}
/* no medium, that's alright. */
if (stat != 0 && sense->sense_key == NOT_READY && sense->asc == 0x3a)
if (stat != 0 && sshdr.sense_key == NOT_READY && sshdr.asc == 0x3a)
stat = 0;
if (stat == 0) {
@ -451,8 +451,8 @@ int ide_cdrom_packet(struct cdrom_device_info *cdi,
layer. the packet must be complete, as we do not
touch it at all. */
if (cgc->sense)
memset(cgc->sense, 0, sizeof(struct request_sense));
if (cgc->sshdr)
memset(cgc->sshdr, 0, sizeof(*cgc->sshdr));
if (cgc->quiet)
flags |= RQF_QUIET;
@ -460,7 +460,7 @@ int ide_cdrom_packet(struct cdrom_device_info *cdi,
cgc->stat = ide_cd_queue_pc(drive, cgc->cmd,
cgc->data_direction == CGC_DATA_WRITE,
cgc->buffer, &len,
cgc->sense, cgc->timeout, flags);
cgc->sshdr, cgc->timeout, flags);
if (!cgc->stat)
cgc->buflen -= len;
return cgc->stat;