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path: root/drivers/scsi/scsi_sysfs.c
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Diffstat (limited to 'drivers/scsi/scsi_sysfs.c')
-rw-r--r--drivers/scsi/scsi_sysfs.c257
1 files changed, 145 insertions, 112 deletions
diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c
index 9117d0bf408e..074e8cc30955 100644
--- a/drivers/scsi/scsi_sysfs.c
+++ b/drivers/scsi/scsi_sysfs.c
@@ -300,7 +300,9 @@ store_shost_eh_deadline(struct device *dev, struct device_attribute *attr,
int ret = -EINVAL;
unsigned long deadline, flags;
- if (shost->transportt && shost->transportt->eh_strategy_handler)
+ if (shost->transportt &&
+ (shost->transportt->eh_strategy_handler ||
+ !shost->hostt->eh_host_reset_handler))
return ret;
if (!strncmp(buf, "off", strlen("off")))
@@ -383,17 +385,14 @@ static void scsi_device_dev_release_usercontext(struct work_struct *work)
{
struct scsi_device *sdev;
struct device *parent;
- struct scsi_target *starget;
struct list_head *this, *tmp;
unsigned long flags;
sdev = container_of(work, struct scsi_device, ew.work);
parent = sdev->sdev_gendev.parent;
- starget = to_scsi_target(parent);
spin_lock_irqsave(sdev->host->host_lock, flags);
- starget->reap_ref++;
list_del(&sdev->siblings);
list_del(&sdev->same_target_siblings);
list_del(&sdev->starved_entry);
@@ -413,8 +412,8 @@ static void scsi_device_dev_release_usercontext(struct work_struct *work)
/* NULL queue means the device can't be used */
sdev->request_queue = NULL;
- scsi_target_reap(scsi_target(sdev));
-
+ kfree(sdev->vpd_pg83);
+ kfree(sdev->vpd_pg80);
kfree(sdev->inquiry);
kfree(sdev);
@@ -579,7 +578,6 @@ static int scsi_sdev_check_buf_bit(const char *buf)
* Create the actual show/store functions and data structures.
*/
sdev_rd_attr (device_blocked, "%d\n");
-sdev_rd_attr (queue_depth, "%d\n");
sdev_rd_attr (device_busy, "%d\n");
sdev_rd_attr (type, "%d\n");
sdev_rd_attr (scsi_level, "%d\n");
@@ -649,23 +647,12 @@ store_rescan_field (struct device *dev, struct device_attribute *attr,
}
static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field);
-static void sdev_store_delete_callback(struct device *dev)
-{
- scsi_remove_device(to_scsi_device(dev));
-}
-
static ssize_t
sdev_store_delete(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
- int rc;
-
- /* An attribute cannot be unregistered by one of its own methods,
- * so we have to use this roundabout approach.
- */
- rc = device_schedule_callback(dev, sdev_store_delete_callback);
- if (rc)
- count = rc;
+ if (device_remove_file_self(dev, attr))
+ scsi_remove_device(to_scsi_device(dev));
return count;
};
static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete);
@@ -723,10 +710,64 @@ show_queue_type_field(struct device *dev, struct device_attribute *attr,
return snprintf(buf, 20, "%s\n", name);
}
-static DEVICE_ATTR(queue_type, S_IRUGO, show_queue_type_field, NULL);
+static ssize_t
+store_queue_type_field(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct scsi_device *sdev = to_scsi_device(dev);
+ struct scsi_host_template *sht = sdev->host->hostt;
+ int tag_type = 0, retval;
+ int prev_tag_type = scsi_get_tag_type(sdev);
+
+ if (!sdev->tagged_supported || !sht->change_queue_type)
+ return -EINVAL;
+
+ if (strncmp(buf, "ordered", 7) == 0)
+ tag_type = MSG_ORDERED_TAG;
+ else if (strncmp(buf, "simple", 6) == 0)
+ tag_type = MSG_SIMPLE_TAG;
+ else if (strncmp(buf, "none", 4) != 0)
+ return -EINVAL;
+
+ if (tag_type == prev_tag_type)
+ return count;
+
+ retval = sht->change_queue_type(sdev, tag_type);
+ if (retval < 0)
+ return retval;
+
+ return count;
+}
+
+static DEVICE_ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field,
+ store_queue_type_field);
+
+#define sdev_vpd_pg_attr(_page) \
+static ssize_t \
+show_vpd_##_page(struct file *filp, struct kobject *kobj, \
+ struct bin_attribute *bin_attr, \
+ char *buf, loff_t off, size_t count) \
+{ \
+ struct device *dev = container_of(kobj, struct device, kobj); \
+ struct scsi_device *sdev = to_scsi_device(dev); \
+ if (!sdev->vpd_##_page) \
+ return -EINVAL; \
+ return memory_read_from_buffer(buf, count, &off, \
+ sdev->vpd_##_page, \
+ sdev->vpd_##_page##_len); \
+} \
+static struct bin_attribute dev_attr_vpd_##_page = { \
+ .attr = {.name = __stringify(vpd_##_page), .mode = S_IRUGO }, \
+ .size = 0, \
+ .read = show_vpd_##_page, \
+};
+
+sdev_vpd_pg_attr(pg83);
+sdev_vpd_pg_attr(pg80);
static ssize_t
-show_iostat_counterbits(struct device *dev, struct device_attribute *attr, char *buf)
+show_iostat_counterbits(struct device *dev, struct device_attribute *attr,
+ char *buf)
{
return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8);
}
@@ -797,46 +838,9 @@ DECLARE_EVT(soft_threshold_reached, SOFT_THRESHOLD_REACHED_REPORTED)
DECLARE_EVT(mode_parameter_change_reported, MODE_PARAMETER_CHANGE_REPORTED)
DECLARE_EVT(lun_change_reported, LUN_CHANGE_REPORTED)
-/* Default template for device attributes. May NOT be modified */
-static struct attribute *scsi_sdev_attrs[] = {
- &dev_attr_device_blocked.attr,
- &dev_attr_type.attr,
- &dev_attr_scsi_level.attr,
- &dev_attr_device_busy.attr,
- &dev_attr_vendor.attr,
- &dev_attr_model.attr,
- &dev_attr_rev.attr,
- &dev_attr_rescan.attr,
- &dev_attr_delete.attr,
- &dev_attr_state.attr,
- &dev_attr_timeout.attr,
- &dev_attr_eh_timeout.attr,
- &dev_attr_iocounterbits.attr,
- &dev_attr_iorequest_cnt.attr,
- &dev_attr_iodone_cnt.attr,
- &dev_attr_ioerr_cnt.attr,
- &dev_attr_modalias.attr,
- REF_EVT(media_change),
- REF_EVT(inquiry_change_reported),
- REF_EVT(capacity_change_reported),
- REF_EVT(soft_threshold_reached),
- REF_EVT(mode_parameter_change_reported),
- REF_EVT(lun_change_reported),
- NULL
-};
-
-static struct attribute_group scsi_sdev_attr_group = {
- .attrs = scsi_sdev_attrs,
-};
-
-static const struct attribute_group *scsi_sdev_attr_groups[] = {
- &scsi_sdev_attr_group,
- NULL
-};
-
static ssize_t
-sdev_store_queue_depth_rw(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t count)
+sdev_store_queue_depth(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
{
int depth, retval;
struct scsi_device *sdev = to_scsi_device(dev);
@@ -859,10 +863,10 @@ sdev_store_queue_depth_rw(struct device *dev, struct device_attribute *attr,
return count;
}
+sdev_show_function(queue_depth, "%d\n");
-static struct device_attribute sdev_attr_queue_depth_rw =
- __ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth,
- sdev_store_queue_depth_rw);
+static DEVICE_ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth,
+ sdev_store_queue_depth);
static ssize_t
sdev_show_queue_ramp_up_period(struct device *dev,
@@ -890,40 +894,79 @@ sdev_store_queue_ramp_up_period(struct device *dev,
return period;
}
-static struct device_attribute sdev_attr_queue_ramp_up_period =
- __ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR,
- sdev_show_queue_ramp_up_period,
- sdev_store_queue_ramp_up_period);
+static DEVICE_ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR,
+ sdev_show_queue_ramp_up_period,
+ sdev_store_queue_ramp_up_period);
-static ssize_t
-sdev_store_queue_type_rw(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t count)
+static umode_t scsi_sdev_attr_is_visible(struct kobject *kobj,
+ struct attribute *attr, int i)
{
+ struct device *dev = container_of(kobj, struct device, kobj);
struct scsi_device *sdev = to_scsi_device(dev);
- struct scsi_host_template *sht = sdev->host->hostt;
- int tag_type = 0, retval;
- int prev_tag_type = scsi_get_tag_type(sdev);
- if (!sdev->tagged_supported || !sht->change_queue_type)
- return -EINVAL;
- if (strncmp(buf, "ordered", 7) == 0)
- tag_type = MSG_ORDERED_TAG;
- else if (strncmp(buf, "simple", 6) == 0)
- tag_type = MSG_SIMPLE_TAG;
- else if (strncmp(buf, "none", 4) != 0)
- return -EINVAL;
+ if (attr == &dev_attr_queue_depth.attr &&
+ !sdev->host->hostt->change_queue_depth)
+ return S_IRUGO;
- if (tag_type == prev_tag_type)
- return count;
+ if (attr == &dev_attr_queue_ramp_up_period.attr &&
+ !sdev->host->hostt->change_queue_depth)
+ return 0;
- retval = sht->change_queue_type(sdev, tag_type);
- if (retval < 0)
- return retval;
+ if (attr == &dev_attr_queue_type.attr &&
+ !sdev->host->hostt->change_queue_type)
+ return S_IRUGO;
- return count;
+ return attr->mode;
}
+/* Default template for device attributes. May NOT be modified */
+static struct attribute *scsi_sdev_attrs[] = {
+ &dev_attr_device_blocked.attr,
+ &dev_attr_type.attr,
+ &dev_attr_scsi_level.attr,
+ &dev_attr_device_busy.attr,
+ &dev_attr_vendor.attr,
+ &dev_attr_model.attr,
+ &dev_attr_rev.attr,
+ &dev_attr_rescan.attr,
+ &dev_attr_delete.attr,
+ &dev_attr_state.attr,
+ &dev_attr_timeout.attr,
+ &dev_attr_eh_timeout.attr,
+ &dev_attr_iocounterbits.attr,
+ &dev_attr_iorequest_cnt.attr,
+ &dev_attr_iodone_cnt.attr,
+ &dev_attr_ioerr_cnt.attr,
+ &dev_attr_modalias.attr,
+ &dev_attr_queue_depth.attr,
+ &dev_attr_queue_type.attr,
+ &dev_attr_queue_ramp_up_period.attr,
+ REF_EVT(media_change),
+ REF_EVT(inquiry_change_reported),
+ REF_EVT(capacity_change_reported),
+ REF_EVT(soft_threshold_reached),
+ REF_EVT(mode_parameter_change_reported),
+ REF_EVT(lun_change_reported),
+ NULL
+};
+
+static struct bin_attribute *scsi_sdev_bin_attrs[] = {
+ &dev_attr_vpd_pg83,
+ &dev_attr_vpd_pg80,
+ NULL
+};
+static struct attribute_group scsi_sdev_attr_group = {
+ .attrs = scsi_sdev_attrs,
+ .bin_attrs = scsi_sdev_bin_attrs,
+ .is_visible = scsi_sdev_attr_is_visible,
+};
+
+static const struct attribute_group *scsi_sdev_attr_groups[] = {
+ &scsi_sdev_attr_group,
+ NULL
+};
+
static int scsi_target_add(struct scsi_target *starget)
{
int error;
@@ -946,10 +989,6 @@ static int scsi_target_add(struct scsi_target *starget)
return 0;
}
-static struct device_attribute sdev_attr_queue_type_rw =
- __ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field,
- sdev_store_queue_type_rw);
-
/**
* scsi_sysfs_add_sdev - add scsi device to sysfs
* @sdev: scsi_device to add
@@ -1003,25 +1042,6 @@ int scsi_sysfs_add_sdev(struct scsi_device *sdev)
transport_add_device(&sdev->sdev_gendev);
sdev->is_visible = 1;
- /* create queue files, which may be writable, depending on the host */
- if (sdev->host->hostt->change_queue_depth) {
- error = device_create_file(&sdev->sdev_gendev,
- &sdev_attr_queue_depth_rw);
- error = device_create_file(&sdev->sdev_gendev,
- &sdev_attr_queue_ramp_up_period);
- }
- else
- error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_depth);
- if (error)
- return error;
-
- if (sdev->host->hostt->change_queue_type)
- error = device_create_file(&sdev->sdev_gendev, &sdev_attr_queue_type_rw);
- else
- error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_type);
- if (error)
- return error;
-
error = bsg_register_queue(rq, &sdev->sdev_gendev, NULL, NULL);
if (error)
@@ -1071,6 +1091,13 @@ void __scsi_remove_device(struct scsi_device *sdev)
sdev->host->hostt->slave_destroy(sdev);
transport_destroy_device(dev);
+ /*
+ * Paired with the kref_get() in scsi_sysfs_initialize(). We have
+ * remoed sysfs visibility from the device, so make the target
+ * invisible if this was the last device underneath it.
+ */
+ scsi_target_reap(scsi_target(sdev));
+
put_device(dev);
}
@@ -1133,7 +1160,7 @@ void scsi_remove_target(struct device *dev)
continue;
if (starget->dev.parent == dev || &starget->dev == dev) {
/* assuming new targets arrive at the end */
- starget->reap_ref++;
+ kref_get(&starget->reap_ref);
spin_unlock_irqrestore(shost->host_lock, flags);
if (last)
scsi_target_reap(last);
@@ -1217,6 +1244,12 @@ void scsi_sysfs_device_initialize(struct scsi_device *sdev)
list_add_tail(&sdev->same_target_siblings, &starget->devices);
list_add_tail(&sdev->siblings, &shost->__devices);
spin_unlock_irqrestore(shost->host_lock, flags);
+ /*
+ * device can now only be removed via __scsi_remove_device() so hold
+ * the target. Target will be held in CREATED state until something
+ * beneath it becomes visible (in which case it moves to RUNNING)
+ */
+ kref_get(&starget->reap_ref);
}
int scsi_is_sdev_device(const struct device *dev)