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-rw-r--r--include/linux/cpu.h2
-rw-r--r--include/linux/firmware.h3
-rw-r--r--include/linux/fwnode.h18
-rw-r--r--include/linux/kernfs.h10
-rw-r--r--include/linux/kobject.h2
-rw-r--r--include/linux/property.h9
-rw-r--r--include/linux/sysfs.h142
7 files changed, 155 insertions, 31 deletions
diff --git a/include/linux/cpu.h b/include/linux/cpu.h
index ae5a20cf2f9c..272e4e79e15c 100644
--- a/include/linux/cpu.h
+++ b/include/linux/cpu.h
@@ -130,7 +130,7 @@ static inline void cpu_maps_update_done(void)
static inline int add_cpu(unsigned int cpu) { return 0;}
#endif /* CONFIG_SMP */
-extern struct bus_type cpu_subsys;
+extern const struct bus_type cpu_subsys;
extern int lockdep_is_cpus_held(void);
diff --git a/include/linux/firmware.h b/include/linux/firmware.h
index 0311858b46ce..f026f8926d79 100644
--- a/include/linux/firmware.h
+++ b/include/linux/firmware.h
@@ -4,6 +4,7 @@
#include <linux/types.h>
#include <linux/compiler.h>
+#include <linux/cleanup.h>
#include <linux/gfp.h>
#define FW_ACTION_NOUEVENT 0
@@ -198,4 +199,6 @@ static inline void firmware_upload_unregister(struct fw_upload *fw_upload)
int firmware_request_cache(struct device *device, const char *name);
+DEFINE_FREE(firmware, struct firmware *, release_firmware(_T))
+
#endif
diff --git a/include/linux/fwnode.h b/include/linux/fwnode.h
index 2a72f55d26eb..0d79070c5a70 100644
--- a/include/linux/fwnode.h
+++ b/include/linux/fwnode.h
@@ -9,10 +9,16 @@
#ifndef _LINUX_FWNODE_H_
#define _LINUX_FWNODE_H_
-#include <linux/types.h>
-#include <linux/list.h>
#include <linux/bits.h>
#include <linux/err.h>
+#include <linux/list.h>
+#include <linux/types.h>
+
+enum dev_dma_attr {
+ DEV_DMA_NOT_SUPPORTED,
+ DEV_DMA_NON_COHERENT,
+ DEV_DMA_COHERENT,
+};
struct fwnode_operations;
struct device;
@@ -53,8 +59,10 @@ struct fwnode_handle {
* fwnode link flags
*
* CYCLE: The fwnode link is part of a cycle. Don't defer probe.
+ * IGNORE: Completely ignore this link, even during cycle detection.
*/
#define FWLINK_FLAG_CYCLE BIT(0)
+#define FWLINK_FLAG_IGNORE BIT(1)
struct fwnode_link {
struct fwnode_handle *supplier;
@@ -187,7 +195,6 @@ struct fwnode_operations {
if (fwnode_has_op(fwnode, op)) \
(fwnode)->ops->op(fwnode, ## __VA_ARGS__); \
} while (false)
-#define get_dev_from_fwnode(fwnode) get_device((fwnode)->dev)
static inline void fwnode_init(struct fwnode_handle *fwnode,
const struct fwnode_operations *ops)
@@ -209,9 +216,10 @@ static inline void fwnode_dev_initialized(struct fwnode_handle *fwnode,
fwnode->flags &= ~FWNODE_FLAG_INITIALIZED;
}
-extern bool fw_devlink_is_strict(void);
-int fwnode_link_add(struct fwnode_handle *con, struct fwnode_handle *sup);
+int fwnode_link_add(struct fwnode_handle *con, struct fwnode_handle *sup,
+ u8 flags);
void fwnode_links_purge(struct fwnode_handle *fwnode);
void fw_devlink_purge_absent_suppliers(struct fwnode_handle *fwnode);
+bool fw_devlink_is_strict(void);
#endif
diff --git a/include/linux/kernfs.h b/include/linux/kernfs.h
index 99aaa050ccb7..87c79d076d6d 100644
--- a/include/linux/kernfs.h
+++ b/include/linux/kernfs.h
@@ -206,23 +206,25 @@ struct kernfs_node {
const void *ns; /* namespace tag */
unsigned int hash; /* ns + name hash */
+ unsigned short flags;
+ umode_t mode;
+
union {
struct kernfs_elem_dir dir;
struct kernfs_elem_symlink symlink;
struct kernfs_elem_attr attr;
};
- void *priv;
-
/*
* 64bit unique ID. On 64bit ino setups, id is the ino. On 32bit,
* the low 32bits are ino and upper generation.
*/
u64 id;
- unsigned short flags;
- umode_t mode;
+ void *priv;
struct kernfs_iattrs *iattr;
+
+ struct rcu_head rcu;
};
/*
diff --git a/include/linux/kobject.h b/include/linux/kobject.h
index c30affcc43b4..c8219505a79f 100644
--- a/include/linux/kobject.h
+++ b/include/linux/kobject.h
@@ -38,7 +38,7 @@ extern char uevent_helper[];
#endif
/* counter to tag the uevent, read only except for the kobject core */
-extern u64 uevent_seqnum;
+extern atomic64_t uevent_seqnum;
/*
* The actions here must match the index to the string array
diff --git a/include/linux/property.h b/include/linux/property.h
index e6516d0b7d52..3a1045eb786c 100644
--- a/include/linux/property.h
+++ b/include/linux/property.h
@@ -11,6 +11,7 @@
#define _LINUX_PROPERTY_H_
#include <linux/args.h>
+#include <linux/array_size.h>
#include <linux/bits.h>
#include <linux/fwnode.h>
#include <linux/stddef.h>
@@ -27,12 +28,6 @@ enum dev_prop_type {
DEV_PROP_REF,
};
-enum dev_dma_attr {
- DEV_DMA_NOT_SUPPORTED,
- DEV_DMA_NON_COHERENT,
- DEV_DMA_COHERENT,
-};
-
const struct fwnode_handle *__dev_fwnode_const(const struct device *dev);
struct fwnode_handle *__dev_fwnode(struct device *dev);
#define dev_fwnode(dev) \
@@ -156,11 +151,9 @@ struct fwnode_handle *fwnode_get_next_parent(struct fwnode_handle *fwnode);
for (parent = fwnode_get_parent(fwnode); parent; \
parent = fwnode_get_next_parent(parent))
-struct device *fwnode_get_next_parent_dev(const struct fwnode_handle *fwnode);
unsigned int fwnode_count_parents(const struct fwnode_handle *fwn);
struct fwnode_handle *fwnode_get_nth_parent(struct fwnode_handle *fwn,
unsigned int depth);
-bool fwnode_is_ancestor_of(const struct fwnode_handle *ancestor, const struct fwnode_handle *child);
struct fwnode_handle *fwnode_get_next_child_node(
const struct fwnode_handle *fwnode, struct fwnode_handle *child);
struct fwnode_handle *fwnode_get_next_available_child_node(
diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
index b717a70219f6..326341c62385 100644
--- a/include/linux/sysfs.h
+++ b/include/linux/sysfs.h
@@ -61,22 +61,32 @@ do { \
/**
* struct attribute_group - data structure used to declare an attribute group.
* @name: Optional: Attribute group name
- * If specified, the attribute group will be created in
- * a new subdirectory with this name.
+ * If specified, the attribute group will be created in a
+ * new subdirectory with this name. Additionally when a
+ * group is named, @is_visible and @is_bin_visible may
+ * return SYSFS_GROUP_INVISIBLE to control visibility of
+ * the directory itself.
* @is_visible: Optional: Function to return permissions associated with an
- * attribute of the group. Will be called repeatedly for each
- * non-binary attribute in the group. Only read/write
+ * attribute of the group. Will be called repeatedly for
+ * each non-binary attribute in the group. Only read/write
* permissions as well as SYSFS_PREALLOC are accepted. Must
- * return 0 if an attribute is not visible. The returned value
- * will replace static permissions defined in struct attribute.
+ * return 0 if an attribute is not visible. The returned
+ * value will replace static permissions defined in struct
+ * attribute. Use SYSFS_GROUP_VISIBLE() when assigning this
+ * callback to specify separate _group_visible() and
+ * _attr_visible() handlers.
* @is_bin_visible:
* Optional: Function to return permissions associated with a
* binary attribute of the group. Will be called repeatedly
* for each binary attribute in the group. Only read/write
- * permissions as well as SYSFS_PREALLOC are accepted. Must
- * return 0 if a binary attribute is not visible. The returned
- * value will replace static permissions defined in
- * struct bin_attribute.
+ * permissions as well as SYSFS_PREALLOC (and the
+ * visibility flags for named groups) are accepted. Must
+ * return 0 if a binary attribute is not visible. The
+ * returned value will replace static permissions defined
+ * in struct bin_attribute. If @is_visible is not set, Use
+ * SYSFS_GROUP_VISIBLE() when assigning this callback to
+ * specify separate _group_visible() and _attr_visible()
+ * handlers.
* @attrs: Pointer to NULL terminated list of attributes.
* @bin_attrs: Pointer to NULL terminated list of binary attributes.
* Either attrs or bin_attrs or both must be provided.
@@ -91,13 +101,121 @@ struct attribute_group {
struct bin_attribute **bin_attrs;
};
+#define SYSFS_PREALLOC 010000
+#define SYSFS_GROUP_INVISIBLE 020000
+
+/*
+ * DEFINE_SYSFS_GROUP_VISIBLE(name):
+ * A helper macro to pair with the assignment of ".is_visible =
+ * SYSFS_GROUP_VISIBLE(name)", that arranges for the directory
+ * associated with a named attribute_group to optionally be hidden.
+ * This allows for static declaration of attribute_groups, and the
+ * simplification of attribute visibility lifetime that implies,
+ * without polluting sysfs with empty attribute directories.
+ * Ex.
+ *
+ * static umode_t example_attr_visible(struct kobject *kobj,
+ * struct attribute *attr, int n)
+ * {
+ * if (example_attr_condition)
+ * return 0;
+ * else if (ro_attr_condition)
+ * return 0444;
+ * return a->mode;
+ * }
+ *
+ * static bool example_group_visible(struct kobject *kobj)
+ * {
+ * if (example_group_condition)
+ * return false;
+ * return true;
+ * }
+ *
+ * DEFINE_SYSFS_GROUP_VISIBLE(example);
+ *
+ * static struct attribute_group example_group = {
+ * .name = "example",
+ * .is_visible = SYSFS_GROUP_VISIBLE(example),
+ * .attrs = &example_attrs,
+ * };
+ *
+ * Note that it expects <name>_attr_visible and <name>_group_visible to
+ * be defined. For cases where individual attributes do not need
+ * separate visibility consideration, only entire group visibility at
+ * once, see DEFINE_SIMPLE_SYSFS_GROUP_VISIBLE().
+ */
+#define DEFINE_SYSFS_GROUP_VISIBLE(name) \
+ static inline umode_t sysfs_group_visible_##name( \
+ struct kobject *kobj, struct attribute *attr, int n) \
+ { \
+ if (n == 0 && !name##_group_visible(kobj)) \
+ return SYSFS_GROUP_INVISIBLE; \
+ return name##_attr_visible(kobj, attr, n); \
+ }
+
+/*
+ * DEFINE_SIMPLE_SYSFS_GROUP_VISIBLE(name):
+ * A helper macro to pair with SYSFS_GROUP_VISIBLE() that like
+ * DEFINE_SYSFS_GROUP_VISIBLE() controls group visibility, but does
+ * not require the implementation of a per-attribute visibility
+ * callback.
+ * Ex.
+ *
+ * static bool example_group_visible(struct kobject *kobj)
+ * {
+ * if (example_group_condition)
+ * return false;
+ * return true;
+ * }
+ *
+ * DEFINE_SIMPLE_SYSFS_GROUP_VISIBLE(example);
+ *
+ * static struct attribute_group example_group = {
+ * .name = "example",
+ * .is_visible = SYSFS_GROUP_VISIBLE(example),
+ * .attrs = &example_attrs,
+ * };
+ */
+#define DEFINE_SIMPLE_SYSFS_GROUP_VISIBLE(name) \
+ static inline umode_t sysfs_group_visible_##name( \
+ struct kobject *kobj, struct attribute *a, int n) \
+ { \
+ if (n == 0 && !name##_group_visible(kobj)) \
+ return SYSFS_GROUP_INVISIBLE; \
+ return a->mode; \
+ }
+
+/*
+ * Same as DEFINE_SYSFS_GROUP_VISIBLE, but for groups with only binary
+ * attributes. If an attribute_group defines both text and binary
+ * attributes, the group visibility is determined by the function
+ * specified to is_visible() not is_bin_visible()
+ */
+#define DEFINE_SYSFS_BIN_GROUP_VISIBLE(name) \
+ static inline umode_t sysfs_group_visible_##name( \
+ struct kobject *kobj, struct bin_attribute *attr, int n) \
+ { \
+ if (n == 0 && !name##_group_visible(kobj)) \
+ return SYSFS_GROUP_INVISIBLE; \
+ return name##_attr_visible(kobj, attr, n); \
+ }
+
+#define DEFINE_SIMPLE_SYSFS_BIN_GROUP_VISIBLE(name) \
+ static inline umode_t sysfs_group_visible_##name( \
+ struct kobject *kobj, struct bin_attribute *a, int n) \
+ { \
+ if (n == 0 && !name##_group_visible(kobj)) \
+ return SYSFS_GROUP_INVISIBLE; \
+ return a->mode; \
+ }
+
+#define SYSFS_GROUP_VISIBLE(fn) sysfs_group_visible_##fn
+
/*
* Use these macros to make defining attributes easier.
* See include/linux/device.h for examples..
*/
-#define SYSFS_PREALLOC 010000
-
#define __ATTR(_name, _mode, _show, _store) { \
.attr = {.name = __stringify(_name), \
.mode = VERIFY_OCTAL_PERMISSIONS(_mode) }, \
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-11 23:45:13 +0300