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authorLinus Torvalds <torvalds@linux-foundation.org>2018-04-04 20:07:20 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-04-04 20:07:20 -0700
commit06dd3dfeea60e2a6457a6aedf97afc8e6d2ba497 (patch)
tree1d8b9efbd7cd3dbb5d7b7663d7fd2de61b26f453 /drivers/thunderbolt/domain.c
parent38047d5c269bbdedf900fc86954913f3dffa01f1 (diff)
parent86f690e8bfd124c38940e7ad58875ef383003348 (diff)
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Merge tag 'char-misc-4.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc updates from Greg KH: "Here is the big set of char/misc driver patches for 4.17-rc1. There are a lot of little things in here, nothing huge, but all important to the different hardware types involved: - thunderbolt driver updates - parport updates (people still care...) - nvmem driver updates - mei updates (as always) - hwtracing driver updates - hyperv driver updates - extcon driver updates - ... and a handful of even smaller driver subsystem and individual driver updates All of these have been in linux-next with no reported issues" * tag 'char-misc-4.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (149 commits) hwtracing: Add HW tracing support menu intel_th: Add ACPI glue layer intel_th: Allow forcing host mode through drvdata intel_th: Pick up irq number from resources intel_th: Don't touch switch routing in host mode intel_th: Use correct method of finding hub intel_th: Add SPDX GPL-2.0 header to replace GPLv2 boilerplate stm class: Make dummy's master/channel ranges configurable stm class: Add SPDX GPL-2.0 header to replace GPLv2 boilerplate MAINTAINERS: Bestow upon myself the care for drivers/hwtracing hv: add SPDX license id to Kconfig hv: add SPDX license to trace Drivers: hv: vmbus: do not mark HV_PCIE as perf_device Drivers: hv: vmbus: respect what we get from hv_get_synint_state() /dev/mem: Avoid overwriting "err" in read_mem() eeprom: at24: use SPDX identifier instead of GPL boiler-plate eeprom: at24: simplify the i2c functionality checking eeprom: at24: fix a line break eeprom: at24: tweak newlines eeprom: at24: refactor at24_probe() ...
Diffstat (limited to 'drivers/thunderbolt/domain.c')
-rw-r--r--drivers/thunderbolt/domain.c130
1 files changed, 129 insertions, 1 deletions
diff --git a/drivers/thunderbolt/domain.c b/drivers/thunderbolt/domain.c
index 9b90115319ce..6281266b8ec0 100644
--- a/drivers/thunderbolt/domain.c
+++ b/drivers/thunderbolt/domain.c
@@ -117,23 +117,151 @@ static const char * const tb_security_names[] = {
[TB_SECURITY_USER] = "user",
[TB_SECURITY_SECURE] = "secure",
[TB_SECURITY_DPONLY] = "dponly",
+ [TB_SECURITY_USBONLY] = "usbonly",
};
+static ssize_t boot_acl_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct tb *tb = container_of(dev, struct tb, dev);
+ uuid_t *uuids;
+ ssize_t ret;
+ int i;
+
+ uuids = kcalloc(tb->nboot_acl, sizeof(uuid_t), GFP_KERNEL);
+ if (!uuids)
+ return -ENOMEM;
+
+ if (mutex_lock_interruptible(&tb->lock)) {
+ ret = -ERESTARTSYS;
+ goto out;
+ }
+ ret = tb->cm_ops->get_boot_acl(tb, uuids, tb->nboot_acl);
+ if (ret) {
+ mutex_unlock(&tb->lock);
+ goto out;
+ }
+ mutex_unlock(&tb->lock);
+
+ for (ret = 0, i = 0; i < tb->nboot_acl; i++) {
+ if (!uuid_is_null(&uuids[i]))
+ ret += snprintf(buf + ret, PAGE_SIZE - ret, "%pUb",
+ &uuids[i]);
+
+ ret += snprintf(buf + ret, PAGE_SIZE - ret, "%s",
+ i < tb->nboot_acl - 1 ? "," : "\n");
+ }
+
+out:
+ kfree(uuids);
+ return ret;
+}
+
+static ssize_t boot_acl_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct tb *tb = container_of(dev, struct tb, dev);
+ char *str, *s, *uuid_str;
+ ssize_t ret = 0;
+ uuid_t *acl;
+ int i = 0;
+
+ /*
+ * Make sure the value is not bigger than tb->nboot_acl * UUID
+ * length + commas and optional "\n". Also the smallest allowable
+ * string is tb->nboot_acl * ",".
+ */
+ if (count > (UUID_STRING_LEN + 1) * tb->nboot_acl + 1)
+ return -EINVAL;
+ if (count < tb->nboot_acl - 1)
+ return -EINVAL;
+
+ str = kstrdup(buf, GFP_KERNEL);
+ if (!str)
+ return -ENOMEM;
+
+ acl = kcalloc(tb->nboot_acl, sizeof(uuid_t), GFP_KERNEL);
+ if (!acl) {
+ ret = -ENOMEM;
+ goto err_free_str;
+ }
+
+ uuid_str = strim(str);
+ while ((s = strsep(&uuid_str, ",")) != NULL && i < tb->nboot_acl) {
+ size_t len = strlen(s);
+
+ if (len) {
+ if (len != UUID_STRING_LEN) {
+ ret = -EINVAL;
+ goto err_free_acl;
+ }
+ ret = uuid_parse(s, &acl[i]);
+ if (ret)
+ goto err_free_acl;
+ }
+
+ i++;
+ }
+
+ if (s || i < tb->nboot_acl) {
+ ret = -EINVAL;
+ goto err_free_acl;
+ }
+
+ if (mutex_lock_interruptible(&tb->lock)) {
+ ret = -ERESTARTSYS;
+ goto err_free_acl;
+ }
+ ret = tb->cm_ops->set_boot_acl(tb, acl, tb->nboot_acl);
+ mutex_unlock(&tb->lock);
+
+err_free_acl:
+ kfree(acl);
+err_free_str:
+ kfree(str);
+
+ return ret ?: count;
+}
+static DEVICE_ATTR_RW(boot_acl);
+
static ssize_t security_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct tb *tb = container_of(dev, struct tb, dev);
+ const char *name = "unknown";
- return sprintf(buf, "%s\n", tb_security_names[tb->security_level]);
+ if (tb->security_level < ARRAY_SIZE(tb_security_names))
+ name = tb_security_names[tb->security_level];
+
+ return sprintf(buf, "%s\n", name);
}
static DEVICE_ATTR_RO(security);
static struct attribute *domain_attrs[] = {
+ &dev_attr_boot_acl.attr,
&dev_attr_security.attr,
NULL,
};
+static umode_t domain_attr_is_visible(struct kobject *kobj,
+ struct attribute *attr, int n)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct tb *tb = container_of(dev, struct tb, dev);
+
+ if (attr == &dev_attr_boot_acl.attr) {
+ if (tb->nboot_acl &&
+ tb->cm_ops->get_boot_acl &&
+ tb->cm_ops->set_boot_acl)
+ return attr->mode;
+ return 0;
+ }
+
+ return attr->mode;
+}
+
static struct attribute_group domain_attr_group = {
+ .is_visible = domain_attr_is_visible,
.attrs = domain_attrs,
};
generated by cgit v1.2.3 (git 2.25.1) at 2025-01-13 15:12:30 +0000