On Thu, 2009-03-19 at 09:06 +0100, Hannes Reinecke wrote:
> For correct ALUA support we should evaluate the TPGS setting
> of the device and only attach the alua device handler to it
> if not zero.
>
> Signed-off-by: Hannes Reinecke <hare@xxxxxxx>
Acked-by: Nicholas A. Bellinger <nab@xxxxxxxxxxxxxxx>
> ---
> drivers/scsi/device_handler/scsi_dh.c | 11 ++++-
> drivers/scsi/device_handler/scsi_dh_alua.c | 68 ++++-----------------------
> drivers/scsi/device_handler/scsi_dh_emc.c | 8 ++--
> drivers/scsi/device_handler/scsi_dh_hp_sw.c | 10 ++--
> drivers/scsi/device_handler/scsi_dh_rdac.c | 38 +++++++-------
> include/scsi/scsi_device.h | 1 +
> 6 files changed, 47 insertions(+), 89 deletions(-)
>
> diff --git a/drivers/scsi/device_handler/scsi_dh.c b/drivers/scsi/device_handler/scsi_dh.c
> index a518f2e..5932083 100644
> --- a/drivers/scsi/device_handler/scsi_dh.c
> +++ b/drivers/scsi/device_handler/scsi_dh.c
> @@ -28,6 +28,7 @@ struct scsi_dh_devinfo_list {
> struct list_head node;
> char vendor[9];
> char model[17];
> + char tpgs;
> struct scsi_device_handler *handler;
> };
>
> @@ -56,11 +57,13 @@ scsi_dh_cache_lookup(struct scsi_device *sdev)
> {
> struct scsi_dh_devinfo_list *tmp;
> struct scsi_device_handler *found_dh = NULL;
> + int tpgs = scsi_device_tpgs(sdev);
>
> spin_lock(&list_lock);
> list_for_each_entry(tmp, &scsi_dh_dev_list, node) {
> if (!strncmp(sdev->vendor, tmp->vendor, strlen(tmp->vendor)) &&
> - !strncmp(sdev->model, tmp->model, strlen(tmp->model))) {
> + !strncmp(sdev->model, tmp->model, strlen(tmp->model)) &&
> + (!tmp->tpgs || (tpgs & tmp->tpgs) != 0)) {
> found_dh = tmp->handler;
> break;
> }
> @@ -74,12 +77,15 @@ static int scsi_dh_handler_lookup(struct scsi_device_handler *scsi_dh,
> struct scsi_device *sdev)
> {
> int i, found = 0;
> + int tpgs = scsi_device_tpgs(sdev);
>
> for(i = 0; scsi_dh->devlist[i].vendor; i++) {
> if (!strncmp(sdev->vendor, scsi_dh->devlist[i].vendor,
> strlen(scsi_dh->devlist[i].vendor)) &&
> !strncmp(sdev->model, scsi_dh->devlist[i].model,
> - strlen(scsi_dh->devlist[i].model))) {
> + strlen(scsi_dh->devlist[i].model)) &&
> + (!scsi_dh->devlist[i].tpgs ||
> + (tpgs & scsi_dh->devlist[i].tpgs) != 0)) {
> found = 1;
> break;
> }
> @@ -128,6 +134,7 @@ device_handler_match(struct scsi_device_handler *scsi_dh,
> strncpy(tmp->model, sdev->model, 16);
> tmp->vendor[8] = '\0';
> tmp->model[16] = '\0';
> + tmp->tpgs = scsi_device_tpgs(sdev);
> tmp->handler = found_dh;
> spin_lock(&list_lock);
> list_add(&tmp->node, &scsi_dh_dev_list);
> diff --git a/drivers/scsi/device_handler/scsi_dh_alua.c b/drivers/scsi/device_handler/scsi_dh_alua.c
> index dba154c..e21460d 100644
> --- a/drivers/scsi/device_handler/scsi_dh_alua.c
> +++ b/drivers/scsi/device_handler/scsi_dh_alua.c
> @@ -118,43 +118,6 @@ static struct request *get_alua_req(struct scsi_device *sdev,
> }
>
> /*
> - * submit_std_inquiry - Issue a standard INQUIRY command
> - * @sdev: sdev the command should be send to
> - */
> -static int submit_std_inquiry(struct scsi_device *sdev, struct alua_dh_data *h)
> -{
> - struct request *rq;
> - int err = SCSI_DH_RES_TEMP_UNAVAIL;
> -
> - rq = get_alua_req(sdev, h->inq, ALUA_INQUIRY_SIZE, READ);
> - if (!rq)
> - goto done;
> -
> - /* Prepare the command. */
> - rq->cmd[0] = INQUIRY;
> - rq->cmd[1] = 0;
> - rq->cmd[2] = 0;
> - rq->cmd[4] = ALUA_INQUIRY_SIZE;
> - rq->cmd_len = COMMAND_SIZE(INQUIRY);
> -
> - rq->sense = h->sense;
> - memset(rq->sense, 0, SCSI_SENSE_BUFFERSIZE);
> - rq->sense_len = h->senselen = 0;
> -
> - err = blk_execute_rq(rq->q, NULL, rq, 1);
> - if (err == -EIO) {
> - sdev_printk(KERN_INFO, sdev,
> - "%s: std inquiry failed with %x\n",
> - ALUA_DH_NAME, rq->errors);
> - h->senselen = rq->sense_len;
> - err = SCSI_DH_IO;
> - }
> - blk_put_request(rq);
> -done:
> - return err;
> -}
> -
> -/*
> * submit_vpd_inquiry - Issue an INQUIRY VPD page 0x83 command
> * @sdev: sdev the command should be sent to
> */
> @@ -281,23 +244,19 @@ done:
> }
>
> /*
> - * alua_std_inquiry - Evaluate standard INQUIRY command
> + * alua_check_tpgs - Evaluate TPGS setting
> * @sdev: device to be checked
> *
> - * Just extract the TPGS setting to find out if ALUA
> + * Just examine the TPGS setting of the device to find out if ALUA
> * is supported.
> */
> -static int alua_std_inquiry(struct scsi_device *sdev, struct alua_dh_data *h)
> +static int alua_check_tpgs(struct scsi_device *sdev, struct alua_dh_data *h)
> {
> - int err;
> -
> - err = submit_std_inquiry(sdev, h);
> -
> - if (err != SCSI_DH_OK)
> - return err;
> + int err = SCSI_DH_OK;
>
> /* Check TPGS setting */
> - h->tpgs = (h->inq[5] >> 4) & 0x3;
> + h->tpgs = scsi_device_tpgs(sdev);
> +
> switch (h->tpgs) {
> case TPGS_MODE_EXPLICIT|TPGS_MODE_IMPLICIT:
> sdev_printk(KERN_INFO, sdev,
> @@ -626,7 +585,7 @@ static int alua_initialize(struct scsi_device *sdev, struct alua_dh_data *h)
> {
> int err;
>
> - err = alua_std_inquiry(sdev, h);
> + err = alua_check_tpgs(sdev, h);
> if (err != SCSI_DH_OK)
> goto out;
>
> @@ -691,17 +650,8 @@ static int alua_prep_fn(struct scsi_device *sdev, struct request *req)
> }
>
> static const struct scsi_dh_devlist alua_dev_list[] = {
> - {"HP", "MSA VOLUME" },
> - {"HP", "HSV101" },
> - {"HP", "HSV111" },
> - {"HP", "HSV200" },
> - {"HP", "HSV210" },
> - {"HP", "HSV300" },
> - {"IBM", "2107900" },
> - {"IBM", "2145" },
> - {"Pillar", "Axiom" },
> - {"Intel", "Multi-Flex"},
> - {NULL, NULL}
> + {"", "", 3 },
> + {NULL, NULL, 0}
> };
>
> static int alua_bus_attach(struct scsi_device *sdev);
> diff --git a/drivers/scsi/device_handler/scsi_dh_emc.c b/drivers/scsi/device_handler/scsi_dh_emc.c
> index 0e572d2..ff2e653 100644
> --- a/drivers/scsi/device_handler/scsi_dh_emc.c
> +++ b/drivers/scsi/device_handler/scsi_dh_emc.c
> @@ -563,10 +563,10 @@ done:
> }
>
> static const struct scsi_dh_devlist clariion_dev_list[] = {
> - {"DGC", "RAID"},
> - {"DGC", "DISK"},
> - {"DGC", "VRAID"},
> - {NULL, NULL},
> + {"DGC", "RAID", 0},
> + {"DGC", "DISK", 0},
> + {"DGC", "VRAID", 0},
> + {NULL, NULL, 0},
> };
>
> static int clariion_bus_attach(struct scsi_device *sdev);
> diff --git a/drivers/scsi/device_handler/scsi_dh_hp_sw.c b/drivers/scsi/device_handler/scsi_dh_hp_sw.c
> index f7da753..3dbfbbf 100644
> --- a/drivers/scsi/device_handler/scsi_dh_hp_sw.c
> +++ b/drivers/scsi/device_handler/scsi_dh_hp_sw.c
> @@ -287,11 +287,11 @@ static int hp_sw_activate(struct scsi_device *sdev)
> }
>
> static const struct scsi_dh_devlist hp_sw_dh_data_list[] = {
> - {"COMPAQ", "MSA1000 VOLUME"},
> - {"COMPAQ", "HSV110"},
> - {"HP", "HSV100"},
> - {"DEC", "HSG80"},
> - {NULL, NULL},
> + {"COMPAQ", "MSA1000 VOLUME", 0},
> + {"COMPAQ", "HSV110", 0},
> + {"HP", "HSV100", 0},
> + {"DEC", "HSG80", 0},
> + {NULL, NULL, 0},
> };
>
> static int hp_sw_bus_attach(struct scsi_device *sdev);
> diff --git a/drivers/scsi/device_handler/scsi_dh_rdac.c b/drivers/scsi/device_handler/scsi_dh_rdac.c
> index 43b8c51..ad046bd 100644
> --- a/drivers/scsi/device_handler/scsi_dh_rdac.c
> +++ b/drivers/scsi/device_handler/scsi_dh_rdac.c
> @@ -609,25 +609,25 @@ static int rdac_check_sense(struct scsi_device *sdev,
> }
>
> static const struct scsi_dh_devlist rdac_dev_list[] = {
> - {"IBM", "1722"},
> - {"IBM", "1724"},
> - {"IBM", "1726"},
> - {"IBM", "1742"},
> - {"IBM", "1814"},
> - {"IBM", "1815"},
> - {"IBM", "1818"},
> - {"IBM", "3526"},
> - {"SGI", "TP9400"},
> - {"SGI", "TP9500"},
> - {"SGI", "IS"},
> - {"STK", "OPENstorage D280"},
> - {"SUN", "CSM200_R"},
> - {"SUN", "LCSM100_F"},
> - {"DELL", "MD3000"},
> - {"DELL", "MD3000i"},
> - {"LSI", "INF-01-00"},
> - {"ENGENIO", "INF-01-00"},
> - {NULL, NULL},
> + {"IBM", "1722", 0},
> + {"IBM", "1724", 0},
> + {"IBM", "1726", 0},
> + {"IBM", "1742", 0},
> + {"IBM", "1814", 0},
> + {"IBM", "1815", 0},
> + {"IBM", "1818", 0},
> + {"IBM", "3526", 0},
> + {"SGI", "TP9400", 0},
> + {"SGI", "TP9500", 0},
> + {"SGI", "IS", 0},
> + {"STK", "OPENstorage D280", 0},
> + {"SUN", "CSM200_R", 0},
> + {"SUN", "LCSM100_F", 0},
> + {"DELL", "MD3000", 0},
> + {"DELL", "MD3000i", 0},
> + {"LSI", "INF-01-00", 0},
> + {"ENGENIO", "INF-01-00", 0},
> + {NULL, NULL, 0},
> };
>
> static int rdac_bus_attach(struct scsi_device *sdev);
> diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
> index 6ac6321..e4df232 100644
> --- a/include/scsi/scsi_device.h
> +++ b/include/scsi/scsi_device.h
> @@ -172,6 +172,7 @@ struct scsi_device {
> struct scsi_dh_devlist {
> char *vendor;
> char *model;
> + char tpgs;
> };
>
> struct scsi_device_handler {
> --
> 1.5.3.2
>
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