From: Hannes Reinecke <hare@suse.de>
To: James Bottomley <james.bottomley@hansenpartnership.com>
Cc: Christoph Hellwig <hch@lst.de>,
linux-scsi@vger.kernel.org,
"Martin K. Petersen" <martin.petersen@oracle.com>,
Mike Snitzer <snitzer@redhat.com>
Subject: [PATCH 05/10] scsi_dh: move device matching to the core code
Date: Wed, 8 Jul 2015 10:30:22 +0200 [thread overview]
Message-ID: <1436344226-94765-6-git-send-email-hare@suse.de> (raw)
In-Reply-To: <1436344226-94765-1-git-send-email-hare@suse.de>
From: Christoph Hellwig <hch@lst.de>
Add a single list of devices that need non-ALUA device handlers to the core
scsi_dh code so that we can autoload the modules for them at probe time.
While this is a little ugly in terms of architecture it actually
significantly simplifies the code in addition to the new autoloading
functionality.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Acked-by: Mike Snitzer <snitzer@redhat.com>
---
drivers/scsi/device_handler/scsi_dh_alua.c | 6 ---
drivers/scsi/device_handler/scsi_dh_emc.c | 29 ----------
drivers/scsi/device_handler/scsi_dh_hp_sw.c | 30 -----------
drivers/scsi/device_handler/scsi_dh_rdac.c | 50 -----------------
drivers/scsi/scsi_dh.c | 84 ++++++++++++++++++++++-------
include/scsi/scsi_device.h | 1 -
6 files changed, 66 insertions(+), 134 deletions(-)
diff --git a/drivers/scsi/device_handler/scsi_dh_alua.c b/drivers/scsi/device_handler/scsi_dh_alua.c
index 854b568..ace2457 100644
--- a/drivers/scsi/device_handler/scsi_dh_alua.c
+++ b/drivers/scsi/device_handler/scsi_dh_alua.c
@@ -819,11 +819,6 @@ static int alua_prep_fn(struct scsi_device *sdev, struct request *req)
}
-static bool alua_match(struct scsi_device *sdev)
-{
- return (scsi_device_tpgs(sdev) != 0);
-}
-
/*
* alua_bus_attach - Attach device handler
* @sdev: device to be attached to
@@ -877,7 +872,6 @@ static struct scsi_device_handler alua_dh = {
.check_sense = alua_check_sense,
.activate = alua_activate,
.set_params = alua_set_params,
- .match = alua_match,
};
static int __init alua_init(void)
diff --git a/drivers/scsi/device_handler/scsi_dh_emc.c b/drivers/scsi/device_handler/scsi_dh_emc.c
index 6ed1caa..fd31e67 100644
--- a/drivers/scsi/device_handler/scsi_dh_emc.c
+++ b/drivers/scsi/device_handler/scsi_dh_emc.c
@@ -622,34 +622,6 @@ done:
return result;
}
-static const struct {
- char *vendor;
- char *model;
-} clariion_dev_list[] = {
- {"DGC", "RAID"},
- {"DGC", "DISK"},
- {"DGC", "VRAID"},
- {NULL, NULL},
-};
-
-static bool clariion_match(struct scsi_device *sdev)
-{
- int i;
-
- if (scsi_device_tpgs(sdev))
- return false;
-
- for (i = 0; clariion_dev_list[i].vendor; i++) {
- if (!strncmp(sdev->vendor, clariion_dev_list[i].vendor,
- strlen(clariion_dev_list[i].vendor)) &&
- !strncmp(sdev->model, clariion_dev_list[i].model,
- strlen(clariion_dev_list[i].model))) {
- return true;
- }
- }
- return false;
-}
-
static struct scsi_dh_data *clariion_bus_attach(struct scsi_device *sdev)
{
struct clariion_dh_data *h;
@@ -698,7 +670,6 @@ static struct scsi_device_handler clariion_dh = {
.activate = clariion_activate,
.prep_fn = clariion_prep_fn,
.set_params = clariion_set_params,
- .match = clariion_match,
};
static int __init clariion_init(void)
diff --git a/drivers/scsi/device_handler/scsi_dh_hp_sw.c b/drivers/scsi/device_handler/scsi_dh_hp_sw.c
index 485d995..1bf10d3 100644
--- a/drivers/scsi/device_handler/scsi_dh_hp_sw.c
+++ b/drivers/scsi/device_handler/scsi_dh_hp_sw.c
@@ -311,35 +311,6 @@ static int hp_sw_activate(struct scsi_device *sdev,
return 0;
}
-static const struct {
- char *vendor;
- char *model;
-} hp_sw_dh_data_list[] = {
- {"COMPAQ", "MSA1000 VOLUME"},
- {"COMPAQ", "HSV110"},
- {"HP", "HSV100"},
- {"DEC", "HSG80"},
- {NULL, NULL},
-};
-
-static bool hp_sw_match(struct scsi_device *sdev)
-{
- int i;
-
- if (scsi_device_tpgs(sdev))
- return false;
-
- for (i = 0; hp_sw_dh_data_list[i].vendor; i++) {
- if (!strncmp(sdev->vendor, hp_sw_dh_data_list[i].vendor,
- strlen(hp_sw_dh_data_list[i].vendor)) &&
- !strncmp(sdev->model, hp_sw_dh_data_list[i].model,
- strlen(hp_sw_dh_data_list[i].model))) {
- return true;
- }
- }
- return false;
-}
-
static struct scsi_dh_data *hp_sw_bus_attach(struct scsi_device *sdev)
{
struct hp_sw_dh_data *h;
@@ -379,7 +350,6 @@ static struct scsi_device_handler hp_sw_dh = {
.detach = hp_sw_bus_detach,
.activate = hp_sw_activate,
.prep_fn = hp_sw_prep_fn,
- .match = hp_sw_match,
};
static int __init hp_sw_init(void)
diff --git a/drivers/scsi/device_handler/scsi_dh_rdac.c b/drivers/scsi/device_handler/scsi_dh_rdac.c
index b46ace3..d89616f 100644
--- a/drivers/scsi/device_handler/scsi_dh_rdac.c
+++ b/drivers/scsi/device_handler/scsi_dh_rdac.c
@@ -778,55 +778,6 @@ static int rdac_check_sense(struct scsi_device *sdev,
return SCSI_RETURN_NOT_HANDLED;
}
-static const struct {
- char *vendor;
- char *model;
-} rdac_dev_list[] = {
- {"IBM", "1722"},
- {"IBM", "1724"},
- {"IBM", "1726"},
- {"IBM", "1742"},
- {"IBM", "1745"},
- {"IBM", "1746"},
- {"IBM", "1813"},
- {"IBM", "1814"},
- {"IBM", "1815"},
- {"IBM", "1818"},
- {"IBM", "3526"},
- {"SGI", "TP9"},
- {"SGI", "IS"},
- {"STK", "OPENstorage D280"},
- {"STK", "FLEXLINE 380"},
- {"SUN", "CSM"},
- {"SUN", "LCSM100"},
- {"SUN", "STK6580_6780"},
- {"SUN", "SUN_6180"},
- {"SUN", "ArrayStorage"},
- {"DELL", "MD3"},
- {"NETAPP", "INF-01-00"},
- {"LSI", "INF-01-00"},
- {"ENGENIO", "INF-01-00"},
- {NULL, NULL},
-};
-
-static bool rdac_match(struct scsi_device *sdev)
-{
- int i;
-
- if (scsi_device_tpgs(sdev))
- return false;
-
- for (i = 0; rdac_dev_list[i].vendor; i++) {
- if (!strncmp(sdev->vendor, rdac_dev_list[i].vendor,
- strlen(rdac_dev_list[i].vendor)) &&
- !strncmp(sdev->model, rdac_dev_list[i].model,
- strlen(rdac_dev_list[i].model))) {
- return true;
- }
- }
- return false;
-}
-
static struct scsi_dh_data *rdac_bus_attach(struct scsi_device *sdev)
{
struct rdac_dh_data *h;
@@ -895,7 +846,6 @@ static struct scsi_device_handler rdac_dh = {
.attach = rdac_bus_attach,
.detach = rdac_bus_detach,
.activate = rdac_activate,
- .match = rdac_match,
};
static int __init rdac_init(void)
diff --git a/drivers/scsi/scsi_dh.c b/drivers/scsi/scsi_dh.c
index 2d6a8bd..8f0a6dc 100644
--- a/drivers/scsi/scsi_dh.c
+++ b/drivers/scsi/scsi_dh.c
@@ -29,6 +29,67 @@
static DEFINE_SPINLOCK(list_lock);
static LIST_HEAD(scsi_dh_list);
+struct scsi_dh_blist {
+ const char *vendor;
+ const char *model;
+ const char *driver;
+};
+
+static const struct scsi_dh_blist scsi_dh_blist[] = {
+ {"DGC", "RAID", "clariion" },
+ {"DGC", "DISK", "clariion" },
+ {"DGC", "VRAID", "clariion" },
+
+ {"COMPAQ", "MSA1000 VOLUME", "hp_sw" },
+ {"COMPAQ", "HSV110", "hp_sw" },
+ {"HP", "HSV100", "hp_sw"},
+ {"DEC", "HSG80", "hp_sw"},
+
+ {"IBM", "1722", "rdac", },
+ {"IBM", "1724", "rdac", },
+ {"IBM", "1726", "rdac", },
+ {"IBM", "1742", "rdac", },
+ {"IBM", "1745", "rdac", },
+ {"IBM", "1746", "rdac", },
+ {"IBM", "1813", "rdac", },
+ {"IBM", "1814", "rdac", },
+ {"IBM", "1815", "rdac", },
+ {"IBM", "1818", "rdac", },
+ {"IBM", "3526", "rdac", },
+ {"SGI", "TP9", "rdac", },
+ {"SGI", "IS", "rdac", },
+ {"STK", "OPENstorage D280", "rdac", },
+ {"STK", "FLEXLINE 380", "rdac", },
+ {"SUN", "CSM", "rdac", },
+ {"SUN", "LCSM100", "rdac", },
+ {"SUN", "STK6580_6780", "rdac", },
+ {"SUN", "SUN_6180", "rdac", },
+ {"SUN", "ArrayStorage", "rdac", },
+ {"DELL", "MD3", "rdac", },
+ {"NETAPP", "INF-01-00", "rdac", },
+ {"LSI", "INF-01-00", "rdac", },
+ {"ENGENIO", "INF-01-00", "rdac", },
+ {NULL, NULL, NULL },
+};
+
+static const char *
+scsi_dh_find_driver(struct scsi_device *sdev)
+{
+ const struct scsi_dh_blist *b;
+
+ if (scsi_device_tpgs(sdev))
+ return "alua";
+
+ for (b = scsi_dh_blist; b->vendor; b++) {
+ if (!strncmp(sdev->vendor, b->vendor, strlen(b->vendor)) &&
+ !strncmp(sdev->model, b->model, strlen(b->model))) {
+ return b->driver;
+ }
+ }
+ return NULL;
+}
+
+
static struct scsi_device_handler *__scsi_dh_lookup(const char *name)
{
struct scsi_device_handler *tmp, *found = NULL;
@@ -57,22 +118,6 @@ static struct scsi_device_handler *scsi_dh_lookup(const char *name)
return dh;
}
-static struct scsi_device_handler *
-device_handler_match(struct scsi_device *sdev)
-{
- struct scsi_device_handler *tmp_dh, *found_dh = NULL;
-
- spin_lock(&list_lock);
- list_for_each_entry(tmp_dh, &scsi_dh_list, list) {
- if (tmp_dh->match && tmp_dh->match(sdev)) {
- found_dh = tmp_dh;
- break;
- }
- }
- spin_unlock(&list_lock);
- return found_dh;
-}
-
/*
* scsi_dh_handler_attach - Attach a device handler to a device
* @sdev - SCSI device the device handler should attach to
@@ -183,14 +228,17 @@ static struct device_attribute scsi_dh_state_attr =
int scsi_dh_add_device(struct scsi_device *sdev)
{
- struct scsi_device_handler *devinfo;
+ struct scsi_device_handler *devinfo = NULL;
+ const char *drv;
int err;
err = device_create_file(&sdev->sdev_gendev, &scsi_dh_state_attr);
if (err)
return err;
- devinfo = device_handler_match(sdev);
+ drv = scsi_dh_find_driver(sdev);
+ if (drv)
+ devinfo = scsi_dh_lookup(drv);
if (devinfo)
err = scsi_dh_handler_attach(sdev, devinfo);
return err;
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
index f870c11..c4476db 100644
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -216,7 +216,6 @@ struct scsi_device_handler {
int (*activate)(struct scsi_device *, activate_complete, void *);
int (*prep_fn)(struct scsi_device *, struct request *);
int (*set_params)(struct scsi_device *, const char *);
- bool (*match)(struct scsi_device *);
};
struct scsi_dh_data {
--
1.8.5.2
next prev parent reply other threads:[~2015-07-08 8:30 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-08 8:30 [PATCH 00/10] Integrate scsi_dh better into the scsi core V4 Hannes Reinecke
2015-07-08 8:30 ` [PATCH 01/10] dm-mpath, scsi_dh: don't let dm detach device handlers Hannes Reinecke
2015-07-08 8:30 ` [PATCH 02/10] dm-mpath, scsi_dh: request scsi_dh modules in scsi_dh, not dm-mpath Hannes Reinecke
2015-07-08 8:30 ` [PATCH 03/10] scsi_dh: move to drivers/scsi Hannes Reinecke
2015-07-08 8:30 ` [PATCH 04/10] scsi_dh: integrate into the core SCSI code Hannes Reinecke
2015-07-08 8:30 ` Hannes Reinecke [this message]
2015-07-08 8:30 ` [PATCH 06/10] scsi_dh: kill struct scsi_dh_data Hannes Reinecke
2015-07-08 8:30 ` [PATCH 07/10] scsi_dh: add a common helper to get a scsi_device from a request_queue Hannes Reinecke
2015-07-08 8:30 ` [PATCH 08/10] scsi_dh: don't allow to detach device handlers at runtime Hannes Reinecke
2015-07-08 8:30 ` [PATCH 09/10] scsi_dh: return individual errors in scsi_dh_activate() Hannes Reinecke
2015-08-27 12:16 [PATCH 00/10] Integrate scsi_dh better into the scsi core V4 Hannes Reinecke
2015-08-27 12:16 ` [PATCH 05/10] scsi_dh: move device matching to the core code Hannes Reinecke
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