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PCI: Hide remove and rescan sysfs interfaces for SR-IOV virtual functions

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PCI devices for SR-IOV virtual functions should only be created/
destroyed by pci_enable_sriov()/pci_disable_sriov() because special
data structures are associated with SR-IOV virtual functions.
So hide hotplug related sysfs interfaces "remove" and "rescan" for
SR-IOV virtual functions, otherwise it may cause memory leakage
and other issues.

Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Donald Dutile <ddutile@redhat.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Ram Pai <linuxram@us.ibm.com>
This commit is contained in:
Jiang Liu 2013-05-31 12:21:31 +08:00 committed by Bjorn Helgaas
parent fbf33f516b
commit dfab88beda
1 changed files with 28 additions and 2 deletions
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30
drivers/pci/pci-sysfs.c
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@ -325,6 +325,8 @@ dev_rescan_store(struct device *dev, struct device_attribute *attr,
}
return count;
}
struct device_attribute dev_rescan_attr = __ATTR(rescan, (S_IWUSR|S_IWGRP),
NULL, dev_rescan_store);
static void remove_callback(struct device *dev)
{
@ -354,6 +356,8 @@ remove_store(struct device *dev, struct device_attribute *dummy,
count = ret;
return count;
}
struct device_attribute dev_remove_attr = __ATTR(remove, (S_IWUSR|S_IWGRP),
NULL, remove_store);
static ssize_t
dev_bus_rescan_store(struct device *dev, struct device_attribute *attr,
@ -504,8 +508,6 @@ struct device_attribute pci_dev_attrs[] = {
__ATTR(broken_parity_status,(S_IRUGO|S_IWUSR),
broken_parity_status_show,broken_parity_status_store),
__ATTR(msi_bus, 0644, msi_bus_show, msi_bus_store),
__ATTR(remove, (S_IWUSR|S_IWGRP), NULL, remove_store),
__ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_rescan_store),
#if defined(CONFIG_PM_RUNTIME) && defined(CONFIG_ACPI)
__ATTR(d3cold_allowed, 0644, d3cold_allowed_show, d3cold_allowed_store),
#endif
@ -1463,6 +1465,29 @@ static umode_t pci_dev_attrs_are_visible(struct kobject *kobj,
return a->mode;
}
static struct attribute *pci_dev_hp_attrs[] = {
&dev_remove_attr.attr,
&dev_rescan_attr.attr,
NULL,
};
static umode_t pci_dev_hp_attrs_are_visible(struct kobject *kobj,
struct attribute *a, int n)
{
struct device *dev = container_of(kobj, struct device, kobj);
struct pci_dev *pdev = to_pci_dev(dev);
if (pdev->is_virtfn)
return 0;
return a->mode;
}
static struct attribute_group pci_dev_hp_attr_group = {
.attrs = pci_dev_hp_attrs,
.is_visible = pci_dev_hp_attrs_are_visible,
};
#ifdef CONFIG_PCI_IOV
static struct attribute *sriov_dev_attrs[] = {
&sriov_totalvfs_attr.attr,
@ -1494,6 +1519,7 @@ static struct attribute_group pci_dev_attr_group = {
static const struct attribute_group *pci_dev_attr_groups[] = {
&pci_dev_attr_group,
&pci_dev_hp_attr_group,
#ifdef CONFIG_PCI_IOV
&sriov_dev_attr_group,
#endif