![Linus Torvalds](/assets/img/avatar_default.png)
Here are all of the driver core and related patches for 4.19-rc1. Nothing huge here, just a number of small cleanups and the ability to now stop the deferred probing after init happens. All of these have been in linux-next for a while with only a merge issue reported. That merge issue is in fs/sysfs/group.c and Stephen has posted the diff of what it should be to resolve this. I'll follow up with that diff to this pull request. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> -----BEGIN PGP SIGNATURE----- iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCW3g86Q8cZ3JlZ0Brcm9h aC5jb20ACgkQMUfUDdst+ynyXQCePaZSW8wft4b7nLN8RdZ98ATBru0Ani10lrJa HQeQJRNbWU1AZ0ym7695 =tOaH -----END PGP SIGNATURE----- Merge tag 'driver-core-4.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core Pull driver core updates from Greg KH: "Here are all of the driver core and related patches for 4.19-rc1. Nothing huge here, just a number of small cleanups and the ability to now stop the deferred probing after init happens. All of these have been in linux-next for a while with only a merge issue reported" * tag 'driver-core-4.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (21 commits) base: core: Remove WARN_ON from link dependencies check drivers/base: stop new probing during shutdown drivers: core: Remove glue dirs from sysfs earlier driver core: remove unnecessary function extern declare sysfs.h: fix non-kernel-doc comment PM / Domains: Stop deferring probe at the end of initcall iommu: Remove IOMMU_OF_DECLARE iommu: Stop deferring probe at end of initcalls pinctrl: Support stopping deferred probe after initcalls dt-bindings: pinctrl: add a 'pinctrl-use-default' property driver core: allow stopping deferred probe after init driver core: add a debugfs entry to show deferred devices sysfs: Fix internal_create_group() for named group updates base: fix order of OF initialization linux/device.h: fix kernel-doc notation warning Documentation: update firmware loader fallback reference kobject: Replace strncpy with memcpy drivers: base: cacheinfo: use OF property_read_u32 instead of get_property,read_number kernfs: Replace strncpy with memcpy device: Add #define dev_fmt similar to #define pr_fmt ...
248 lines
7.6 KiB
C
248 lines
7.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* kobject.h - generic kernel object infrastructure.
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*
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* Copyright (c) 2002-2003 Patrick Mochel
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* Copyright (c) 2002-2003 Open Source Development Labs
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* Copyright (c) 2006-2008 Greg Kroah-Hartman <greg@kroah.com>
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* Copyright (c) 2006-2008 Novell Inc.
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*
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* Please read Documentation/kobject.txt before using the kobject
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* interface, ESPECIALLY the parts about reference counts and object
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* destructors.
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*/
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#ifndef _KOBJECT_H_
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#define _KOBJECT_H_
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#include <linux/types.h>
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#include <linux/list.h>
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#include <linux/sysfs.h>
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#include <linux/compiler.h>
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#include <linux/spinlock.h>
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#include <linux/kref.h>
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#include <linux/kobject_ns.h>
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#include <linux/kernel.h>
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#include <linux/wait.h>
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#include <linux/atomic.h>
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#include <linux/workqueue.h>
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#include <linux/uidgid.h>
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#define UEVENT_HELPER_PATH_LEN 256
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#define UEVENT_NUM_ENVP 32 /* number of env pointers */
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#define UEVENT_BUFFER_SIZE 2048 /* buffer for the variables */
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#ifdef CONFIG_UEVENT_HELPER
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/* path to the userspace helper executed on an event */
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extern char uevent_helper[];
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#endif
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/* counter to tag the uevent, read only except for the kobject core */
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extern u64 uevent_seqnum;
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/*
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* The actions here must match the index to the string array
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* in lib/kobject_uevent.c
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*
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* Do not add new actions here without checking with the driver-core
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* maintainers. Action strings are not meant to express subsystem
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* or device specific properties. In most cases you want to send a
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* kobject_uevent_env(kobj, KOBJ_CHANGE, env) with additional event
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* specific variables added to the event environment.
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*/
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enum kobject_action {
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KOBJ_ADD,
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KOBJ_REMOVE,
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KOBJ_CHANGE,
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KOBJ_MOVE,
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KOBJ_ONLINE,
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KOBJ_OFFLINE,
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KOBJ_BIND,
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KOBJ_UNBIND,
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KOBJ_MAX
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};
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struct kobject {
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const char *name;
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struct list_head entry;
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struct kobject *parent;
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struct kset *kset;
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struct kobj_type *ktype;
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struct kernfs_node *sd; /* sysfs directory entry */
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struct kref kref;
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#ifdef CONFIG_DEBUG_KOBJECT_RELEASE
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struct delayed_work release;
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#endif
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unsigned int state_initialized:1;
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unsigned int state_in_sysfs:1;
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unsigned int state_add_uevent_sent:1;
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unsigned int state_remove_uevent_sent:1;
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unsigned int uevent_suppress:1;
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};
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extern __printf(2, 3)
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int kobject_set_name(struct kobject *kobj, const char *name, ...);
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extern __printf(2, 0)
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int kobject_set_name_vargs(struct kobject *kobj, const char *fmt,
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va_list vargs);
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static inline const char *kobject_name(const struct kobject *kobj)
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{
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return kobj->name;
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}
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extern void kobject_init(struct kobject *kobj, struct kobj_type *ktype);
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extern __printf(3, 4) __must_check
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int kobject_add(struct kobject *kobj, struct kobject *parent,
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const char *fmt, ...);
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extern __printf(4, 5) __must_check
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int kobject_init_and_add(struct kobject *kobj,
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struct kobj_type *ktype, struct kobject *parent,
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const char *fmt, ...);
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extern void kobject_del(struct kobject *kobj);
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extern struct kobject * __must_check kobject_create(void);
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extern struct kobject * __must_check kobject_create_and_add(const char *name,
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struct kobject *parent);
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extern int __must_check kobject_rename(struct kobject *, const char *new_name);
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extern int __must_check kobject_move(struct kobject *, struct kobject *);
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extern struct kobject *kobject_get(struct kobject *kobj);
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extern struct kobject * __must_check kobject_get_unless_zero(
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struct kobject *kobj);
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extern void kobject_put(struct kobject *kobj);
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extern const void *kobject_namespace(struct kobject *kobj);
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extern void kobject_get_ownership(struct kobject *kobj,
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kuid_t *uid, kgid_t *gid);
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extern char *kobject_get_path(struct kobject *kobj, gfp_t flag);
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/**
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* kobject_has_children - Returns whether a kobject has children.
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* @kobj: the object to test
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*
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* This will return whether a kobject has other kobjects as children.
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*
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* It does NOT account for the presence of attribute files, only sub
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* directories. It also assumes there is no concurrent addition or
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* removal of such children, and thus relies on external locking.
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*/
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static inline bool kobject_has_children(struct kobject *kobj)
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{
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WARN_ON_ONCE(kref_read(&kobj->kref) == 0);
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return kobj->sd && kobj->sd->dir.subdirs;
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}
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struct kobj_type {
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void (*release)(struct kobject *kobj);
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const struct sysfs_ops *sysfs_ops;
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struct attribute **default_attrs;
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const struct kobj_ns_type_operations *(*child_ns_type)(struct kobject *kobj);
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const void *(*namespace)(struct kobject *kobj);
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void (*get_ownership)(struct kobject *kobj, kuid_t *uid, kgid_t *gid);
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};
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struct kobj_uevent_env {
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char *argv[3];
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char *envp[UEVENT_NUM_ENVP];
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int envp_idx;
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char buf[UEVENT_BUFFER_SIZE];
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int buflen;
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};
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struct kset_uevent_ops {
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int (* const filter)(struct kset *kset, struct kobject *kobj);
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const char *(* const name)(struct kset *kset, struct kobject *kobj);
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int (* const uevent)(struct kset *kset, struct kobject *kobj,
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struct kobj_uevent_env *env);
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};
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struct kobj_attribute {
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struct attribute attr;
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ssize_t (*show)(struct kobject *kobj, struct kobj_attribute *attr,
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char *buf);
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ssize_t (*store)(struct kobject *kobj, struct kobj_attribute *attr,
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const char *buf, size_t count);
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};
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extern const struct sysfs_ops kobj_sysfs_ops;
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struct sock;
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/**
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* struct kset - a set of kobjects of a specific type, belonging to a specific subsystem.
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*
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* A kset defines a group of kobjects. They can be individually
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* different "types" but overall these kobjects all want to be grouped
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* together and operated on in the same manner. ksets are used to
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* define the attribute callbacks and other common events that happen to
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* a kobject.
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*
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* @list: the list of all kobjects for this kset
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* @list_lock: a lock for iterating over the kobjects
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* @kobj: the embedded kobject for this kset (recursion, isn't it fun...)
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* @uevent_ops: the set of uevent operations for this kset. These are
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* called whenever a kobject has something happen to it so that the kset
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* can add new environment variables, or filter out the uevents if so
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* desired.
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*/
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struct kset {
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struct list_head list;
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spinlock_t list_lock;
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struct kobject kobj;
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const struct kset_uevent_ops *uevent_ops;
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} __randomize_layout;
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extern void kset_init(struct kset *kset);
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extern int __must_check kset_register(struct kset *kset);
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extern void kset_unregister(struct kset *kset);
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extern struct kset * __must_check kset_create_and_add(const char *name,
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const struct kset_uevent_ops *u,
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struct kobject *parent_kobj);
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static inline struct kset *to_kset(struct kobject *kobj)
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{
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return kobj ? container_of(kobj, struct kset, kobj) : NULL;
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}
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static inline struct kset *kset_get(struct kset *k)
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{
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return k ? to_kset(kobject_get(&k->kobj)) : NULL;
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}
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static inline void kset_put(struct kset *k)
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{
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kobject_put(&k->kobj);
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}
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static inline struct kobj_type *get_ktype(struct kobject *kobj)
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{
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return kobj->ktype;
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}
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extern struct kobject *kset_find_obj(struct kset *, const char *);
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/* The global /sys/kernel/ kobject for people to chain off of */
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extern struct kobject *kernel_kobj;
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/* The global /sys/kernel/mm/ kobject for people to chain off of */
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extern struct kobject *mm_kobj;
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/* The global /sys/hypervisor/ kobject for people to chain off of */
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extern struct kobject *hypervisor_kobj;
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/* The global /sys/power/ kobject for people to chain off of */
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extern struct kobject *power_kobj;
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/* The global /sys/firmware/ kobject for people to chain off of */
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extern struct kobject *firmware_kobj;
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int kobject_uevent(struct kobject *kobj, enum kobject_action action);
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int kobject_uevent_env(struct kobject *kobj, enum kobject_action action,
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char *envp[]);
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int kobject_synth_uevent(struct kobject *kobj, const char *buf, size_t count);
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__printf(2, 3)
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int add_uevent_var(struct kobj_uevent_env *env, const char *format, ...);
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#endif /* _KOBJECT_H_ */
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