Instead of having each and every driver maintaining and scanning
their own device table we should rather have a general list
and just add any new entries from the device handlers.
This allows us also to implement a general callback for all
device handler instead of having one per handler.
Signed-off-by: Hannes Reinecke <hare@xxxxxxx>
---
drivers/scsi/device_handler/scsi_dh.c | 176 +++++++++++++++++++++++++--
drivers/scsi/device_handler/scsi_dh_emc.c | 99 +++++++---------
drivers/scsi/device_handler/scsi_dh_hp_sw.c | 89 ++++++--------
drivers/scsi/device_handler/scsi_dh_rdac.c | 106 +++++++----------
include/scsi/scsi_device.h | 9 ++-
5 files changed, 300 insertions(+), 179 deletions(-)
diff --git a/drivers/scsi/device_handler/scsi_dh.c b/drivers/scsi/device_handler/scsi_dh.c
index ab6c21c..55e5fd2 100644
--- a/drivers/scsi/device_handler/scsi_dh.c
+++ b/drivers/scsi/device_handler/scsi_dh.c
@@ -26,6 +26,18 @@
static DEFINE_SPINLOCK(list_lock);
static LIST_HEAD(scsi_dh_list);
+static LIST_HEAD(scsi_dh_dev_list);
+
+struct scsi_dh_devinfo_list {
+ struct list_head node;
+ char vendor[9];
+ char model[17];
+ struct scsi_device_handler *handler;
+};
+
+int scsi_dh_handler_attach(struct scsi_device *sdev,
+ struct scsi_device_handler *scsi_dh);
+int scsi_dh_handler_detach(struct scsi_device *sdev);
static struct scsi_device_handler *get_device_handler(const char *name)
{
@@ -33,7 +45,7 @@ static struct scsi_device_handler *get_device_handler(const char *name)
spin_lock(&list_lock);
list_for_each_entry(tmp, &scsi_dh_list, list) {
- if (!strcmp(tmp->name, name)) {
+ if (!strncmp(tmp->name, name, strlen(tmp->name))) {
found = tmp;
break;
}
@@ -42,11 +54,98 @@ static struct scsi_device_handler *get_device_handler(const char *name)
return found;
}
+/*
+ * scsi_dh_handler_attach - Attach a device handler to a device
+ * @sdev - SCSI device the device handler should attach to
+ * @scsi_dh - The device handler to attach
+ */
+int scsi_dh_handler_attach(struct scsi_device *sdev,
+ struct scsi_device_handler *scsi_dh)
+{
+ int err = -EBUSY;
+
+ if (sdev->scsi_dh_data)
+ return err;
+
+ err = scsi_dh->attach(sdev);
+
+ return err;
+}
+
+/*
+ * scsi_dh_handler_detach - Detach a device handler to a device
+ * @sdev - SCSI device the device handler should be detached from
+ */
+int scsi_dh_handler_detach(struct scsi_device *sdev)
+{
+ struct scsi_device_handler *scsi_dh;
+
+ if (!sdev->scsi_dh_data)
+ return -ENODEV;
+
+ scsi_dh = sdev->scsi_dh_data->scsi_dh;
+
+ scsi_dh->detach(sdev);
+
+ return 0;
+}
+
+static int scsi_dh_notifier(struct notifier_block *nb,
+ unsigned long action, void *data)
+{
+ struct device *dev = data;
+ struct scsi_device *sdev;
+ struct scsi_dh_devinfo_list *tmp, *devinfo = NULL;
+
+ if (!scsi_is_sdev_device(dev))
+ return 0;
+
+ sdev = to_scsi_device(dev);
+
+ 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))) {
+ devinfo = tmp;
+ break;
+ }
+ }
+
+ if (!devinfo)
+ goto out;
+
+ if (action == BUS_NOTIFY_ADD_DEVICE) {
+ scsi_dh_handler_attach(sdev, devinfo->handler);
+ } else if (action == BUS_NOTIFY_DEL_DEVICE) {
+ if (sdev->scsi_dh_data == NULL)
+ goto out;
+ scsi_dh_handler_detach(sdev);
+ }
+out:
+ return 0;
+}
+
static int scsi_dh_notifier_add(struct device *dev, void *data)
{
struct scsi_device_handler *scsi_dh = data;
+ struct scsi_device *sdev;
+ struct scsi_dh_devinfo_list *tmp;
+
+ if (!scsi_is_sdev_device(dev))
+ return 0;
+
+ sdev = to_scsi_device(dev);
+
+ list_for_each_entry(tmp, &scsi_dh_dev_list, node) {
+ if (tmp->handler != scsi_dh)
+ continue;
+
+ if (!strncmp(sdev->vendor, tmp->vendor, strlen(tmp->vendor)) &&
+ !strncmp(sdev->model, tmp->model, strlen(tmp->model))) {
+ scsi_dh_handler_attach(sdev, scsi_dh);
+ break;
+ }
+ }
- scsi_dh->nb.notifier_call(&scsi_dh->nb, BUS_NOTIFY_ADD_DEVICE, dev);
return 0;
}
@@ -60,18 +159,37 @@ static int scsi_dh_notifier_add(struct device *dev, void *data)
int scsi_register_device_handler(struct scsi_device_handler *scsi_dh)
{
int ret = -EBUSY;
+ int i;
struct scsi_device_handler *tmp;
+ struct scsi_dh_devinfo_list *devinfo;
tmp = get_device_handler(scsi_dh->name);
if (tmp)
goto done;
- ret = bus_register_notifier(&scsi_bus_type, &scsi_dh->nb);
-
- bus_for_each_dev(&scsi_bus_type, NULL, scsi_dh, scsi_dh_notifier_add);
spin_lock(&list_lock);
+ for (i = 0; scsi_dh->devlist[i].vendor; i++) {
+ devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
+ if (!devinfo) {
+ printk(KERN_ERR "%s: no memory\n", __FUNCTION__);
+ ret = -ENOMEM;
+ goto done;
+ }
+ strncpy(devinfo->vendor, scsi_dh->devlist[i].vendor, 8);
+ strncpy(devinfo->model, scsi_dh->devlist[i].model, 16);
+ devinfo->vendor[8] = '\0';
+ devinfo->model[16] = '\0';
+ devinfo->handler = scsi_dh;
+ list_add(&devinfo->node, &scsi_dh_dev_list);
+ printk(KERN_INFO "%s: registered device '%s/%s'\n",
+ scsi_dh->name, devinfo->vendor, devinfo->model);
+ }
+
list_add(&scsi_dh->list, &scsi_dh_list);
spin_unlock(&list_lock);
+ bus_for_each_dev(&scsi_bus_type, NULL, scsi_dh, scsi_dh_notifier_add);
+ printk(KERN_INFO "%s: registered\n", scsi_dh->name);
+ ret = SCSI_DH_OK;
done:
return ret;
@@ -81,8 +199,18 @@ EXPORT_SYMBOL_GPL(scsi_register_device_handler);
static int scsi_dh_notifier_remove(struct device *dev, void *data)
{
struct scsi_device_handler *scsi_dh = data;
+ struct scsi_device *sdev;
+
+ if (!scsi_is_sdev_device(dev))
+ return 0;
+
+ sdev = to_scsi_device(dev);
+
+ if (!sdev->scsi_dh_data || sdev->scsi_dh_data->scsi_dh != scsi_dh)
+ return 0;
+
+ scsi_dh_handler_detach(sdev);
- scsi_dh->nb.notifier_call(&scsi_dh->nb, BUS_NOTIFY_DEL_DEVICE, dev);
return 0;
}
@@ -97,18 +225,27 @@ int scsi_unregister_device_handler(struct scsi_device_handler *scsi_dh)
{
int ret = -ENODEV;
struct scsi_device_handler *tmp;
+ struct scsi_dh_devinfo_list *devinfo, *tmpdev;
tmp = get_device_handler(scsi_dh->name);
if (!tmp)
goto done;
- ret = bus_unregister_notifier(&scsi_bus_type, &scsi_dh->nb);
-
bus_for_each_dev(&scsi_bus_type, NULL, scsi_dh,
- scsi_dh_notifier_remove);
+ scsi_dh_notifier_remove);
+
spin_lock(&list_lock);
+ list_for_each_entry_safe(devinfo, tmpdev, &scsi_dh_dev_list, node) {
+ if (devinfo->handler != scsi_dh)
+ continue;
+
+ list_del_init(&devinfo->node);
+ kfree(devinfo);
+ }
list_del(&scsi_dh->list);
spin_unlock(&list_lock);
+ printk(KERN_INFO "%s: unregistered\n", scsi_dh->name);
+ ret = SCSI_DH_OK;
done:
return ret;
@@ -157,6 +294,27 @@ int scsi_dh_handler_exist(const char *name)
}
EXPORT_SYMBOL_GPL(scsi_dh_handler_exist);
+static struct notifier_block scsi_dh_nb = {
+ .notifier_call = scsi_dh_notifier
+};
+
+static int __init scsi_dh_init(void)
+{
+ int r;
+
+ r = bus_register_notifier(&scsi_bus_type, &scsi_dh_nb);
+
+ return r;
+}
+
+static void __exit scsi_dh_exit(void)
+{
+ bus_unregister_notifier(&scsi_bus_type, &scsi_dh_nb);
+}
+
+module_init(scsi_dh_init);
+module_exit(scsi_dh_exit);
+
MODULE_DESCRIPTION("SCSI device handler");
MODULE_AUTHOR("Chandra Seetharaman <sekharan@xxxxxxxxxx>");
MODULE_LICENSE("GPL");
diff --git a/drivers/scsi/device_handler/scsi_dh_emc.c b/drivers/scsi/device_handler/scsi_dh_emc.c
index ed53f14..6b81ee5 100644
--- a/drivers/scsi/device_handler/scsi_dh_emc.c
+++ b/drivers/scsi/device_handler/scsi_dh_emc.c
@@ -390,21 +390,21 @@ static int clariion_check_sense(struct scsi_device *sdev,
return SUCCESS;
}
-static const struct {
- char *vendor;
- char *model;
-} clariion_dev_list[] = {
+const struct scsi_dh_devlist clariion_dev_list[] = {
{"DGC", "RAID"},
{"DGC", "DISK"},
{NULL, NULL},
};
-static int clariion_bus_notify(struct notifier_block *, unsigned long, void *);
+static int clariion_bus_attach(struct scsi_device *sdev);
+static void clariion_bus_detach(struct scsi_device *sdev);
static struct scsi_device_handler clariion_dh = {
.name = CLARIION_NAME,
.module = THIS_MODULE,
- .nb.notifier_call = clariion_bus_notify,
+ .devlist = clariion_dev_list,
+ .attach = clariion_bus_attach,
+ .detach = clariion_bus_detach,
.check_sense = clariion_check_sense,
.activate = clariion_activate,
};
@@ -412,68 +412,57 @@ static struct scsi_device_handler clariion_dh = {
/*
* TODO: need some interface so we can set trespass values
*/
-static int clariion_bus_notify(struct notifier_block *nb,
- unsigned long action, void *data)
+static int clariion_bus_attach(struct scsi_device *sdev)
{
- struct device *dev = data;
- struct scsi_device *sdev = to_scsi_device(dev);
struct scsi_dh_data *scsi_dh_data;
struct clariion_dh_data *h;
- int i, found = 0;
unsigned long flags;
- if (action == BUS_NOTIFY_ADD_DEVICE) {
- 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))) {
- found = 1;
- break;
- }
- }
- if (!found)
- goto out;
-
- scsi_dh_data = kzalloc(sizeof(struct scsi_device_handler *)
- + sizeof(*h) , GFP_KERNEL);
- if (!scsi_dh_data) {
- sdev_printk(KERN_ERR, sdev, "Attach failed %s.\n",
- CLARIION_NAME);
- goto out;
- }
+ if (sdev->scsi_dh_data)
+ return -EBUSY;
- scsi_dh_data->scsi_dh = &clariion_dh;
- h = (struct clariion_dh_data *) scsi_dh_data->buf;
- h->default_sp = CLARIION_UNBOUND_LU;
- h->current_sp = CLARIION_UNBOUND_LU;
+ scsi_dh_data = kzalloc(sizeof(struct scsi_device_handler *)
+ + sizeof(*h) , GFP_KERNEL);
+ if (!scsi_dh_data) {
+ sdev_printk(KERN_ERR, sdev, "Attach failed %s.\n",
+ CLARIION_NAME);
+ return -ENOMEM;
+ }
- spin_lock_irqsave(sdev->request_queue->queue_lock, flags);
- sdev->scsi_dh_data = scsi_dh_data;
- spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags);
+ scsi_dh_data->scsi_dh = &clariion_dh;
+ h = (struct clariion_dh_data *) scsi_dh_data->buf;
+ h->default_sp = CLARIION_UNBOUND_LU;
+ h->current_sp = CLARIION_UNBOUND_LU;
- sdev_printk(KERN_NOTICE, sdev, "Attached %s.\n", CLARIION_NAME);
- try_module_get(THIS_MODULE);
+ spin_lock_irqsave(sdev->request_queue->queue_lock, flags);
+ sdev->scsi_dh_data = scsi_dh_data;
+ spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags);
- } else if (action == BUS_NOTIFY_DEL_DEVICE) {
- if (sdev->scsi_dh_data == NULL ||
- sdev->scsi_dh_data->scsi_dh != &clariion_dh)
- goto out;
+ sdev_printk(KERN_NOTICE, sdev, "Attached %s.\n", CLARIION_NAME);
+ try_module_get(THIS_MODULE);
- spin_lock_irqsave(sdev->request_queue->queue_lock, flags);
- scsi_dh_data = sdev->scsi_dh_data;
- sdev->scsi_dh_data = NULL;
- spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags);
+ return 0;
+}
- sdev_printk(KERN_NOTICE, sdev, "Dettached %s.\n",
- CLARIION_NAME);
+static void clariion_bus_detach(struct scsi_device *sdev)
+{
+ struct scsi_dh_data *scsi_dh_data;
+ unsigned long flags;
- kfree(scsi_dh_data);
- module_put(THIS_MODULE);
- }
+ if (sdev->scsi_dh_data == NULL ||
+ sdev->scsi_dh_data->scsi_dh != &clariion_dh)
+ return;
-out:
- return 0;
+ spin_lock_irqsave(sdev->request_queue->queue_lock, flags);
+ scsi_dh_data = sdev->scsi_dh_data;
+ sdev->scsi_dh_data = NULL;
+ spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags);
+
+ sdev_printk(KERN_NOTICE, sdev, "Detached %s.\n",
+ CLARIION_NAME);
+
+ kfree(scsi_dh_data);
+ module_put(THIS_MODULE);
}
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 12ceab7..505c5dd 100644
--- a/drivers/scsi/device_handler/scsi_dh_hp_sw.c
+++ b/drivers/scsi/device_handler/scsi_dh_hp_sw.c
@@ -108,80 +108,67 @@ done:
return ret;
}
-static const struct {
- char *vendor;
- char *model;
-} hp_sw_dh_data_list[] = {
+const struct scsi_dh_devlist hp_sw_dh_data_list[] = {
{"COMPAQ", "MSA"},
{"HP", "HSV"},
{"DEC", "HSG80"},
{NULL, NULL},
};
-static int hp_sw_bus_notify(struct notifier_block *, unsigned long, void *);
+static int hp_sw_bus_attach(struct scsi_device *sdev);
+static void hp_sw_bus_detach(struct scsi_device *sdev);
static struct scsi_device_handler hp_sw_dh = {
.name = HP_SW_NAME,
.module = THIS_MODULE,
- .nb.notifier_call = hp_sw_bus_notify,
+ .devlist = hp_sw_dh_data_list,
+ .attach = hp_sw_bus_attach,
+ .detach = hp_sw_bus_detach,
.activate = hp_sw_activate,
};
-static int hp_sw_bus_notify(struct notifier_block *nb,
- unsigned long action, void *data)
+static int hp_sw_bus_attach(struct scsi_device *sdev)
{
- struct device *dev = data;
- struct scsi_device *sdev = to_scsi_device(dev);
struct scsi_dh_data *scsi_dh_data;
- int i, found = 0;
unsigned long flags;
- if (action == BUS_NOTIFY_ADD_DEVICE) {
- 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))) {
- found = 1;
- break;
- }
- }
- if (!found)
- goto out;
-
- scsi_dh_data = kzalloc(sizeof(struct scsi_device_handler *)
- + sizeof(struct hp_sw_dh_data) , GFP_KERNEL);
- if (!scsi_dh_data) {
- sdev_printk(KERN_ERR, sdev, "Attach Failed %s.\n",
- HP_SW_NAME);
- goto out;
- }
+ scsi_dh_data = kzalloc(sizeof(struct scsi_device_handler *)
+ + sizeof(struct hp_sw_dh_data) , GFP_KERNEL);
+ if (!scsi_dh_data) {
+ sdev_printk(KERN_ERR, sdev, "Attach Failed %s.\n",
+ HP_SW_NAME);
+ return 0;
+ }
- scsi_dh_data->scsi_dh = &hp_sw_dh;
- spin_lock_irqsave(sdev->request_queue->queue_lock, flags);
- sdev->scsi_dh_data = scsi_dh_data;
- spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags);
- try_module_get(THIS_MODULE);
+ scsi_dh_data->scsi_dh = &hp_sw_dh;
+ spin_lock_irqsave(sdev->request_queue->queue_lock, flags);
+ sdev->scsi_dh_data = scsi_dh_data;
+ spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags);
+ try_module_get(THIS_MODULE);
+
+ sdev_printk(KERN_NOTICE, sdev, "Attached %s.\n", HP_SW_NAME);
+
+ return 0;
+}
- sdev_printk(KERN_NOTICE, sdev, "Attached %s.\n", HP_SW_NAME);
- } else if (action == BUS_NOTIFY_DEL_DEVICE) {
- if (sdev->scsi_dh_data == NULL ||
- sdev->scsi_dh_data->scsi_dh != &hp_sw_dh)
- goto out;
+static void hp_sw_bus_detach( struct scsi_device *sdev )
+{
+ struct scsi_dh_data *scsi_dh_data;
+ unsigned long flags;
- spin_lock_irqsave(sdev->request_queue->queue_lock, flags);
- scsi_dh_data = sdev->scsi_dh_data;
- sdev->scsi_dh_data = NULL;
- spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags);
- module_put(THIS_MODULE);
+ if (sdev->scsi_dh_data == NULL ||
+ sdev->scsi_dh_data->scsi_dh != &hp_sw_dh)
+ return;
- sdev_printk(KERN_NOTICE, sdev, "Dettached %s.\n", HP_SW_NAME);
+ spin_lock_irqsave(sdev->request_queue->queue_lock, flags);
+ scsi_dh_data = sdev->scsi_dh_data;
+ sdev->scsi_dh_data = NULL;
+ spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags);
+ module_put(THIS_MODULE);
- kfree(scsi_dh_data);
- }
+ sdev_printk(KERN_NOTICE, sdev, "Detached %s\n", HP_SW_NAME);
-out:
- return 0;
+ kfree(scsi_dh_data);
}
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 6fff077..e61cde6 100644
--- a/drivers/scsi/device_handler/scsi_dh_rdac.c
+++ b/drivers/scsi/device_handler/scsi_dh_rdac.c
@@ -569,10 +569,7 @@ static int rdac_check_sense(struct scsi_device *sdev,
return SCSI_RETURN_NOT_HANDLED;
}
-static const struct {
- char *vendor;
- char *model;
-} rdac_dev_list[] = {
+const struct scsi_dh_devlist rdac_dev_list[] = {
{"IBM", "1722"},
{"IBM", "1724"},
{"IBM", "1726"},
@@ -590,84 +587,67 @@ static const struct {
{NULL, NULL},
};
-static int rdac_bus_notify(struct notifier_block *, unsigned long, void *);
+static int rdac_bus_attach(struct scsi_device *sdev);
+static void rdac_bus_detach(struct scsi_device *sdev);
static struct scsi_device_handler rdac_dh = {
.name = RDAC_NAME,
.module = THIS_MODULE,
- .nb.notifier_call = rdac_bus_notify,
+ .devlist = rdac_dev_list,
.prep_fn = rdac_prep_fn,
.check_sense = rdac_check_sense,
+ .attach = rdac_bus_attach,
+ .detach = rdac_bus_detach,
.activate = rdac_activate,
};
-/*
- * TODO: need some interface so we can set trespass values
- */
-static int rdac_bus_notify(struct notifier_block *nb,
- unsigned long action, void *data)
+static int rdac_bus_attach(struct scsi_device *sdev)
{
- struct device *dev = data;
- struct scsi_device *sdev = to_scsi_device(dev);
struct scsi_dh_data *scsi_dh_data;
struct rdac_dh_data *h;
- int i, found = 0;
unsigned long flags;
- if (action == BUS_NOTIFY_ADD_DEVICE) {
- 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))) {
- found = 1;
- break;
- }
- }
- if (!found)
- goto out;
-
- scsi_dh_data = kzalloc(sizeof(struct scsi_device_handler *)
- + sizeof(*h) , GFP_KERNEL);
- if (!scsi_dh_data) {
- sdev_printk(KERN_ERR, sdev, "Attach failed %s.\n",
- RDAC_NAME);
- goto out;
- }
-
- scsi_dh_data->scsi_dh = &rdac_dh;
- h = (struct rdac_dh_data *) scsi_dh_data->buf;
- h->lun = UNINITIALIZED_LUN;
- h->state = RDAC_STATE_ACTIVE;
- spin_lock_irqsave(sdev->request_queue->queue_lock, flags);
- sdev->scsi_dh_data = scsi_dh_data;
- spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags);
- try_module_get(THIS_MODULE);
-
- sdev_printk(KERN_NOTICE, sdev, "Attached %s.\n", RDAC_NAME);
-
- } else if (action == BUS_NOTIFY_DEL_DEVICE) {
- if (sdev->scsi_dh_data == NULL ||
- sdev->scsi_dh_data->scsi_dh != &rdac_dh)
- goto out;
-
- spin_lock_irqsave(sdev->request_queue->queue_lock, flags);
- scsi_dh_data = sdev->scsi_dh_data;
- sdev->scsi_dh_data = NULL;
- spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags);
-
- h = (struct rdac_dh_data *) scsi_dh_data->buf;
- if (h->ctlr)
- kref_put(&h->ctlr->kref, release_controller);
- kfree(scsi_dh_data);
- module_put(THIS_MODULE);
- sdev_printk(KERN_NOTICE, sdev, "Dettached %s.\n", RDAC_NAME);
+ scsi_dh_data = kzalloc(sizeof(struct scsi_device_handler *)
+ + sizeof(*h) , GFP_KERNEL);
+ if (!scsi_dh_data) {
+ sdev_printk(KERN_ERR, sdev, "Attach failed %s.\n",
+ RDAC_NAME);
+ return 0;
}
-out:
+ scsi_dh_data->scsi_dh = &rdac_dh;
+ h = (struct rdac_dh_data *) scsi_dh_data->buf;
+ h->lun = UNINITIALIZED_LUN;
+ h->state = RDAC_STATE_ACTIVE;
+ spin_lock_irqsave(sdev->request_queue->queue_lock, flags);
+ sdev->scsi_dh_data = scsi_dh_data;
+ spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags);
+ try_module_get(THIS_MODULE);
+
+ sdev_printk(KERN_NOTICE, sdev, "Attached %s\n", RDAC_NAME);
+
return 0;
}
+static void rdac_bus_detach( struct scsi_device *sdev )
+{
+ struct scsi_dh_data *scsi_dh_data;
+ struct rdac_dh_data *h;
+ unsigned long flags;
+
+ spin_lock_irqsave(sdev->request_queue->queue_lock, flags);
+ scsi_dh_data = sdev->scsi_dh_data;
+ sdev->scsi_dh_data = NULL;
+ spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags);
+
+ h = (struct rdac_dh_data *) scsi_dh_data->buf;
+ if (h->ctlr)
+ kref_put(&h->ctlr->kref, release_controller);
+ kfree(scsi_dh_data);
+ module_put(THIS_MODULE);
+ sdev_printk(KERN_NOTICE, sdev, "Detached %s\n", RDAC_NAME);
+}
+
static int __init rdac_init(void)
{
int r;
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
index 06b979f..62ce167 100644
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -166,15 +166,22 @@ struct scsi_device {
unsigned long sdev_data[0];
} __attribute__((aligned(sizeof(unsigned long))));
+struct scsi_dh_devlist {
+ char *vendor;
+ char *model;
+};
+
struct scsi_device_handler {
/* Used by the infrastructure */
struct list_head list; /* list of scsi_device_handlers */
- struct notifier_block nb;
/* Filled by the hardware handler */
struct module *module;
const char *name;
+ const struct scsi_dh_devlist *devlist;
int (*check_sense)(struct scsi_device *, struct scsi_sense_hdr *);
+ int (*attach)(struct scsi_device *);
+ void (*detach)(struct scsi_device *);
int (*activate)(struct scsi_device *);
int (*prep_fn)(struct scsi_device *, struct request *);
};
--
1.5.2.4
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