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| author | Jeff Garzik <jeff@garzik.org> | 2007-10-29 17:15:22 -0400 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2007-11-03 22:23:02 -0400 |
| commit | a341cd0f6a0fde1f85fec9aa8f81f824ea4a3f92 (patch) | |
| tree | e96b2ab04c94cb1a29d972b135dd6b2bdfac0f78 /drivers/scsi/scsi_sysfs.c | |
| parent | b4f555081fdd27d13e6ff39d455d5aefae9d2c0c (diff) | |
SCSI: add asynchronous event notification API
Originally based on a patch by Kristen Carlson Accardi @ Intel.
Copious input from James Bottomley.
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/scsi/scsi_sysfs.c')
| -rw-r--r-- | drivers/scsi/scsi_sysfs.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c index d531ceeb0d8..f374fdcb681 100644 --- a/drivers/scsi/scsi_sysfs.c +++ b/drivers/scsi/scsi_sysfs.c @@ -268,6 +268,7 @@ 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); @@ -282,6 +283,16 @@ static void scsi_device_dev_release_usercontext(struct work_struct *work) list_del(&sdev->starved_entry); spin_unlock_irqrestore(sdev->host->host_lock, flags); + cancel_work_sync(&sdev->event_work); + + list_for_each_safe(this, tmp, &sdev->event_list) { + struct scsi_event *evt; + + evt = list_entry(this, struct scsi_event, node); + list_del(&evt->node); + kfree(evt); + } + if (sdev->request_queue) { sdev->request_queue->queuedata = NULL; /* user context needed to free queue */ @@ -614,6 +625,41 @@ sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf) } static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL); +#define DECLARE_EVT_SHOW(name, Cap_name) \ +static ssize_t \ +sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \ + char *buf) \ +{ \ + struct scsi_device *sdev = to_scsi_device(dev); \ + int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\ + return snprintf(buf, 20, "%d\n", val); \ +} + +#define DECLARE_EVT_STORE(name, Cap_name) \ +static ssize_t \ +sdev_store_evt_##name(struct device *dev, struct device_attribute *attr, \ + const char *buf, size_t count) \ +{ \ + struct scsi_device *sdev = to_scsi_device(dev); \ + int val = simple_strtoul(buf, NULL, 0); \ + if (val == 0) \ + clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \ + else if (val == 1) \ + set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \ + else \ + return -EINVAL; \ + return count; \ +} + +#define DECLARE_EVT(name, Cap_name) \ + DECLARE_EVT_SHOW(name, Cap_name) \ + DECLARE_EVT_STORE(name, Cap_name) \ + static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \ + sdev_store_evt_##name); +#define REF_EVT(name) &dev_attr_evt_##name.attr + +DECLARE_EVT(media_change, MEDIA_CHANGE) + /* Default template for device attributes. May NOT be modified */ static struct attribute *scsi_sdev_attrs[] = { &dev_attr_device_blocked.attr, @@ -631,6 +677,7 @@ static struct attribute *scsi_sdev_attrs[] = { &dev_attr_iodone_cnt.attr, &dev_attr_ioerr_cnt.attr, &dev_attr_modalias.attr, + REF_EVT(media_change), NULL }; |