drivers/scsi/fnic/fnic_attrs.c

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

File Facts

System
Linux kernel
Corpus path
drivers/scsi/fnic/fnic_attrs.c
Extension
.c
Size
1568 bytes
Lines
57
Domain
Driver Families
Bucket
drivers/scsi
Inferred role
Driver Families: implementation source
Status
source 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

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
 * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
 */
#include <linux/string.h>
#include <linux/device.h>
#include <scsi/scsi_host.h>
#include "fnic.h"

static ssize_t fnic_show_state(struct device *dev,
			       struct device_attribute *attr, char *buf)
{
	struct fnic *fnic =
		*((struct fnic **) shost_priv(class_to_shost(dev)));

	return sysfs_emit(buf, "%s\n", fnic_state_str[fnic->state]);
}

static ssize_t fnic_show_drv_version(struct device *dev,
				     struct device_attribute *attr, char *buf)
{
	return sysfs_emit(buf, "%s\n", DRV_VERSION);
}

static ssize_t fnic_show_link_state(struct device *dev,
				    struct device_attribute *attr, char *buf)
{
	struct fnic *fnic =
		*((struct fnic **) shost_priv(class_to_shost(dev)));

	return sysfs_emit(buf, "%s\n",
					  ((fnic->iport.state != FNIC_IPORT_STATE_INIT) &&
					   (fnic->iport.state != FNIC_IPORT_STATE_LINK_WAIT)) ?
					  "Link Up" : "Link Down");
}

static DEVICE_ATTR(fnic_state, S_IRUGO, fnic_show_state, NULL);
static DEVICE_ATTR(drv_version, S_IRUGO, fnic_show_drv_version, NULL);
static DEVICE_ATTR(link_state, S_IRUGO, fnic_show_link_state, NULL);

static struct attribute *fnic_host_attrs[] = {
	&dev_attr_fnic_state.attr,
	&dev_attr_drv_version.attr,
	&dev_attr_link_state.attr,
	NULL,
};

static const struct attribute_group fnic_host_attr_group = {
	.attrs = fnic_host_attrs
};

const struct attribute_group *fnic_host_groups[] = {
	&fnic_host_attr_group,
	NULL
};

Annotation

Implementation Notes