drivers/scsi/scsi_sysfs.c

Source file repositories/reference/linux-study-clean/drivers/scsi/scsi_sysfs.c

File Facts

System
Linux kernel
Corpus path
drivers/scsi/scsi_sysfs.c
Extension
.c
Size
45166 bytes
Lines
1733
Domain
Driver Families
Bucket
drivers/scsi
Inferred role
Driver Families: operation-table or driver-model contract
Status
pattern implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

static int scsi_bus_match(struct device *dev, const struct device_driver *gendrv)
{
	struct scsi_device *sdp;

	if (dev->type != &scsi_dev_type)
		return 0;

	sdp = to_scsi_device(dev);
	if (sdp->no_uld_attach)
		return 0;
	return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0;
}

static int scsi_bus_uevent(const struct device *dev, struct kobj_uevent_env *env)
{
	const struct scsi_device *sdev;

	if (dev->type != &scsi_dev_type)
		return 0;

	sdev = to_scsi_device(dev);

	add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type);
	return 0;
}

static int scsi_bus_probe(struct device *dev)
{
	struct scsi_device *sdp = to_scsi_device(dev);
	struct scsi_driver *drv = to_scsi_driver(dev->driver);

	if (drv->probe)
		return drv->probe(sdp);
	else
		return 0;
}

static void scsi_bus_remove(struct device *dev)
{
	struct scsi_device *sdp = to_scsi_device(dev);
	struct scsi_driver *drv = to_scsi_driver(dev->driver);

	if (drv->remove)
		drv->remove(sdp);
}

static void scsi_bus_shutdown(struct device *dev)
{
	struct scsi_device *sdp = to_scsi_device(dev);
	struct scsi_driver *drv;

	if (!dev->driver)
		return;

	drv = to_scsi_driver(dev->driver);

	if (drv->shutdown)
		drv->shutdown(sdp);
}


const struct bus_type scsi_bus_type = {
	.name		= "scsi",
	.match		= scsi_bus_match,
	.uevent		= scsi_bus_uevent,
	.probe		= scsi_bus_probe,
	.remove		= scsi_bus_remove,
	.shutdown	= scsi_bus_shutdown,
#ifdef CONFIG_PM
	.pm		= &scsi_bus_pm_ops,
#endif
};

int scsi_sysfs_register(void)
{
	int error;

	error = bus_register(&scsi_bus_type);
	if (!error) {
		error = class_register(&sdev_class);
		if (error)
			bus_unregister(&scsi_bus_type);
	}

	return error;
}

void scsi_sysfs_unregister(void)
{
	class_unregister(&sdev_class);

Annotation

Implementation Notes