[S390] tape: add medium state notifications
Add uevent notifications for tape cartridge load and tape cartridge unload events. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Родитель
25591b0703
Коммит
3b210e7652
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@ -209,29 +209,79 @@ tape_state_set(struct tape_device *device, enum tape_state newstate)
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wake_up(&device->state_change_wq);
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}
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struct tape_med_state_work_data {
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struct tape_device *device;
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enum tape_medium_state state;
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struct work_struct work;
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};
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static void
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tape_med_state_work_handler(struct work_struct *work)
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{
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static char env_state_loaded[] = "MEDIUM_STATE=LOADED";
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static char env_state_unloaded[] = "MEDIUM_STATE=UNLOADED";
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struct tape_med_state_work_data *p =
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container_of(work, struct tape_med_state_work_data, work);
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struct tape_device *device = p->device;
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char *envp[] = { NULL, NULL };
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switch (p->state) {
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case MS_UNLOADED:
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pr_info("%s: The tape cartridge has been successfully "
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"unloaded\n", dev_name(&device->cdev->dev));
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envp[0] = env_state_unloaded;
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kobject_uevent_env(&device->cdev->dev.kobj, KOBJ_CHANGE, envp);
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break;
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case MS_LOADED:
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pr_info("%s: A tape cartridge has been mounted\n",
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dev_name(&device->cdev->dev));
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envp[0] = env_state_loaded;
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kobject_uevent_env(&device->cdev->dev.kobj, KOBJ_CHANGE, envp);
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break;
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default:
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break;
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}
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tape_put_device(device);
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kfree(p);
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}
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static void
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tape_med_state_work(struct tape_device *device, enum tape_medium_state state)
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{
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struct tape_med_state_work_data *p;
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p = kzalloc(sizeof(*p), GFP_ATOMIC);
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if (p) {
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INIT_WORK(&p->work, tape_med_state_work_handler);
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p->device = tape_get_device(device);
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p->state = state;
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schedule_work(&p->work);
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}
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}
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void
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tape_med_state_set(struct tape_device *device, enum tape_medium_state newstate)
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{
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if (device->medium_state == newstate)
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enum tape_medium_state oldstate;
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oldstate = device->medium_state;
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if (oldstate == newstate)
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return;
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device->medium_state = newstate;
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switch(newstate){
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case MS_UNLOADED:
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device->tape_generic_status |= GMT_DR_OPEN(~0);
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if (device->medium_state == MS_LOADED)
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pr_info("%s: The tape cartridge has been successfully "
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"unloaded\n", dev_name(&device->cdev->dev));
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if (oldstate == MS_LOADED)
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tape_med_state_work(device, MS_UNLOADED);
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break;
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case MS_LOADED:
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device->tape_generic_status &= ~GMT_DR_OPEN(~0);
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if (device->medium_state == MS_UNLOADED)
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pr_info("%s: A tape cartridge has been mounted\n",
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dev_name(&device->cdev->dev));
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if (oldstate == MS_UNLOADED)
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tape_med_state_work(device, MS_LOADED);
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break;
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default:
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// print nothing
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break;
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}
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device->medium_state = newstate;
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wake_up(&device->state_change_wq);
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}
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