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scsi: core: Support retrieving sub-pages of mode pages

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Allow scsi_mode_sense() to retrieve sub-pages of mode pages by adding the
subpage argument. Change all the current caller sites to specify the
subpage 0.

Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Link: https://lore.kernel.org/r/20230511011356.227789-7-nks@flawful.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Damien Le Moal 2023-05-11 03:13:39 +02:00 committed by Martin K. Petersen
parent 734326937b
commit a6cdc35fab
5 changed files with 13 additions and 12 deletions
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4
drivers/scsi/scsi_lib.c
View File

@ -2144,6 +2144,7 @@ EXPORT_SYMBOL_GPL(scsi_mode_select);
* @sdev: SCSI device to be queried
* @dbd: set to prevent mode sense from returning block descriptors
* @modepage: mode page being requested
* @subpage: sub-page of the mode page being requested
* @buffer: request buffer (may not be smaller than eight bytes)
* @len: length of request buffer.
* @timeout: command timeout
@ -2155,7 +2156,7 @@ EXPORT_SYMBOL_GPL(scsi_mode_select);
* Returns zero if successful, or a negative error number on failure
*/
int
scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage,
scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage, int subpage,
unsigned char *buffer, int len, int timeout, int retries,
struct scsi_mode_data *data, struct scsi_sense_hdr *sshdr)
{
@ -2175,6 +2176,7 @@ scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage,
dbd = sdev->set_dbd_for_ms ? 8 : dbd;
cmd[1] = dbd & 0x18; /* allows DBD and LLBA bits */
cmd[2] = modepage;
cmd[3] = subpage;
sshdr = exec_args.sshdr;

2
drivers/scsi/scsi_transport_sas.c
View File

@ -1245,7 +1245,7 @@ int sas_read_port_mode_page(struct scsi_device *sdev)
if (!buffer)
return -ENOMEM;
error = scsi_mode_sense(sdev, 1, 0x19, buffer, BUF_SIZE, 30*HZ, 3,
error = scsi_mode_sense(sdev, 1, 0x19, 0, buffer, BUF_SIZE, 30*HZ, 3,
&mode_data, NULL);
if (error)

9
drivers/scsi/sd.c
View File

@ -183,7 +183,7 @@ cache_type_store(struct device *dev, struct device_attribute *attr,
return count;
}
if (scsi_mode_sense(sdp, 0x08, 8, buffer, sizeof(buffer), SD_TIMEOUT,
if (scsi_mode_sense(sdp, 0x08, 8, 0, buffer, sizeof(buffer), SD_TIMEOUT,
sdkp->max_retries, &data, NULL))
return -EINVAL;
len = min_t(size_t, sizeof(buffer), data.length - data.header_length -
@ -2609,9 +2609,8 @@ sd_do_mode_sense(struct scsi_disk *sdkp, int dbd, int modepage,
if (sdkp->device->use_10_for_ms && len < 8)
len = 8;
return scsi_mode_sense(sdkp->device, dbd, modepage, buffer, len,
SD_TIMEOUT, sdkp->max_retries, data,
sshdr);
return scsi_mode_sense(sdkp->device, dbd, modepage, 0, buffer, len,
SD_TIMEOUT, sdkp->max_retries, data, sshdr);
}
/*
@ -2868,7 +2867,7 @@ static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer)
if (sdkp->protection_type == 0)
return;
res = scsi_mode_sense(sdp, 1, 0x0a, buffer, 36, SD_TIMEOUT,
res = scsi_mode_sense(sdp, 1, 0x0a, 0, buffer, 36, SD_TIMEOUT,
sdkp->max_retries, &data, &sshdr);
if (res < 0 || !data.header_length ||

2
drivers/scsi/sr.c
View File

@ -825,7 +825,7 @@ static int get_capabilities(struct scsi_cd *cd)
scsi_test_unit_ready(cd->device, SR_TIMEOUT, MAX_RETRIES, &sshdr);
/* ask for mode page 0x2a */
rc = scsi_mode_sense(cd->device, 0, 0x2a, buffer, ms_len,
rc = scsi_mode_sense(cd->device, 0, 0x2a, 0, buffer, ms_len,
SR_TIMEOUT, 3, &data, NULL);
if (rc < 0 || data.length > ms_len ||

8
include/scsi/scsi_device.h
View File

@ -421,10 +421,10 @@ extern int scsi_track_queue_full(struct scsi_device *, int);
extern int scsi_set_medium_removal(struct scsi_device *, char);
extern int scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage,
unsigned char *buffer, int len, int timeout,
int retries, struct scsi_mode_data *data,
struct scsi_sense_hdr *);
int scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage,
int subpage, unsigned char *buffer, int len, int timeout,
int retries, struct scsi_mode_data *data,
struct scsi_sense_hdr *);
extern int scsi_mode_select(struct scsi_device *sdev, int pf, int sp,
unsigned char *buffer, int len, int timeout,
int retries, struct scsi_mode_data *data,