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-rw-r--r--drivers/base/bus.c23
-rw-r--r--drivers/base/core.c22
-rw-r--r--drivers/base/driver.c22
-rw-r--r--fs/sysfs/group.c54
-rw-r--r--include/linux/sysfs.h4
5 files changed, 64 insertions, 61 deletions
diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index 5ee5d3c..f099af0 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -884,32 +884,13 @@ static void bus_remove_attrs(struct bus_type *bus)
static int bus_add_groups(struct bus_type *bus,
const struct attribute_group **groups)
{
- int error = 0;
- int i;
-
- if (groups) {
- for (i = 0; groups[i]; i++) {
- error = sysfs_create_group(&bus->p->subsys.kobj,
- groups[i]);
- if (error) {
- while (--i >= 0)
- sysfs_remove_group(&bus->p->subsys.kobj,
- groups[i]);
- break;
- }
- }
- }
- return error;
+ return sysfs_create_groups(&bus->p->subsys.kobj, groups);
}
static void bus_remove_groups(struct bus_type *bus,
const struct attribute_group **groups)
{
- int i;
-
- if (groups)
- for (i = 0; groups[i]; i++)
- sysfs_remove_group(&bus->p->subsys.kobj, groups[i]);
+ sysfs_remove_groups(&bus->p->subsys.kobj, groups);
}
static void klist_devices_get(struct klist_node *n)
diff --git a/drivers/base/core.c b/drivers/base/core.c
index af646af..d743dce 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -493,31 +493,13 @@ static void device_remove_bin_attributes(struct device *dev,
int device_add_groups(struct device *dev, const struct attribute_group **groups)
{
- int error = 0;
- int i;
-
- if (groups) {
- for (i = 0; groups[i]; i++) {
- error = sysfs_create_group(&dev->kobj, groups[i]);
- if (error) {
- while (--i >= 0)
- sysfs_remove_group(&dev->kobj,
- groups[i]);
- break;
- }
- }
- }
- return error;
+ return sysfs_create_groups(&dev->kobj, groups);
}
void device_remove_groups(struct device *dev,
const struct attribute_group **groups)
{
- int i;
-
- if (groups)
- for (i = 0; groups[i]; i++)
- sysfs_remove_group(&dev->kobj, groups[i]);
+ sysfs_remove_groups(&dev->kobj, groups);
}
static int device_add_attrs(struct device *dev)
diff --git a/drivers/base/driver.c b/drivers/base/driver.c
index 89db726..c7efccb 100644
--- a/drivers/base/driver.c
+++ b/drivers/base/driver.c
@@ -126,31 +126,13 @@ EXPORT_SYMBOL_GPL(driver_remove_file);
int driver_add_groups(struct device_driver *drv,
const struct attribute_group **groups)
{
- int error = 0;
- int i;
-
- if (groups) {
- for (i = 0; groups[i]; i++) {
- error = sysfs_create_group(&drv->p->kobj, groups[i]);
- if (error) {
- while (--i >= 0)
- sysfs_remove_group(&drv->p->kobj,
- groups[i]);
- break;
- }
- }
- }
- return error;
+ return sysfs_create_groups(&drv->p->kobj, groups);
}
void driver_remove_groups(struct device_driver *drv,
const struct attribute_group **groups)
{
- int i;
-
- if (groups)
- for (i = 0; groups[i]; i++)
- sysfs_remove_group(&drv->p->kobj, groups[i]);
+ sysfs_remove_groups(&drv->p->kobj, groups);
}
/**
diff --git a/fs/sysfs/group.c b/fs/sysfs/group.c
index 09a1a25..68baf85 100644
--- a/fs/sysfs/group.c
+++ b/fs/sysfs/group.c
@@ -131,6 +131,40 @@ int sysfs_create_group(struct kobject *kobj,
}
/**
+ * sysfs_create_groups - given a directory kobject, create a bunch of attribute groups
+ * @kobj: The kobject to create the group on
+ * @groups: The attribute groups to create, NULL terminated
+ *
+ * This function creates a bunch of attribute groups. If an error occurs when
+ * creating a group, all previously created groups will be removed, unwinding
+ * everything back to the original state when this function was called.
+ * It will explicitly warn and error if any of the attribute files being
+ * created already exist.
+ *
+ * Returns 0 on success or error code from sysfs_create_groups on error.
+ */
+int sysfs_create_groups(struct kobject *kobj,
+ const struct attribute_group **groups)
+{
+ int error = 0;
+ int i;
+
+ if (!groups)
+ return 0;
+
+ for (i = 0; groups[i]; i++) {
+ error = sysfs_create_group(kobj, groups[i]);
+ if (error) {
+ while (--i >= 0)
+ sysfs_remove_group(kobj, groups[i]);
+ break;
+ }
+ }
+ return error;
+}
+EXPORT_SYMBOL_GPL(sysfs_create_groups);
+
+/**
* sysfs_update_group - given a directory kobject, update an attribute group
* @kobj: The kobject to update the group on
* @grp: The attribute group to update
@@ -179,6 +213,26 @@ void sysfs_remove_group(struct kobject * kobj,
}
/**
+ * sysfs_remove_groups - remove a list of groups
+ *
+ * kobj: The kobject for the groups to be removed from
+ * groups: NULL terminated list of groups to be removed
+ *
+ * If groups is not NULL, the all groups will be removed from the kobject
+ */
+void sysfs_remove_groups(struct kobject *kobj,
+ const struct attribute_group **groups)
+{
+ int i;
+
+ if (!groups)
+ return;
+ for (i = 0; groups[i]; i++)
+ sysfs_remove_group(kobj, groups[i]);
+}
+EXPORT_SYMBOL_GPL(sysfs_remove_groups);
+
+/**
* sysfs_merge_group - merge files into a pre-existing attribute group.
* @kobj: The kobject containing the group.
* @grp: The files to create and the attribute group they belong to.
diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
index 0f04958..4dbb9d3 100644
--- a/include/linux/sysfs.h
+++ b/include/linux/sysfs.h
@@ -215,10 +215,14 @@ void sysfs_delete_link(struct kobject *dir, struct kobject *targ,
int __must_check sysfs_create_group(struct kobject *kobj,
const struct attribute_group *grp);
+int __must_check sysfs_create_groups(struct kobject *kobj,
+ const struct attribute_group **groups);
int sysfs_update_group(struct kobject *kobj,
const struct attribute_group *grp);
void sysfs_remove_group(struct kobject *kobj,
const struct attribute_group *grp);
+void sysfs_remove_groups(struct kobject *kobj,
+ const struct attribute_group **groups);
int sysfs_add_file_to_group(struct kobject *kobj,
const struct attribute *attr, const char *group);
void sysfs_remove_file_from_group(struct kobject *kobj,
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