#include "kernfs-internal.h"
/*
- * There's one sysfs_open_file for each open file and one sysfs_open_dirent
+ * There's one kernfs_open_file for each open file and one kernfs_open_node
* for each kernfs_node with one or more open files.
*
- * kernfs_node->s_attr.open points to sysfs_open_dirent. s_attr.open is
- * protected by sysfs_open_dirent_lock.
+ * kernfs_node->attr.open points to kernfs_open_node. attr.open is
+ * protected by kernfs_open_node_lock.
*
* filp->private_data points to seq_file whose ->private points to
- * sysfs_open_file. sysfs_open_files are chained at
- * sysfs_open_dirent->files, which is protected by sysfs_open_file_mutex.
+ * kernfs_open_file. kernfs_open_files are chained at
+ * kernfs_open_node->files, which is protected by kernfs_open_file_mutex.
*/
-static DEFINE_SPINLOCK(sysfs_open_dirent_lock);
-static DEFINE_MUTEX(sysfs_open_file_mutex);
+static DEFINE_SPINLOCK(kernfs_open_node_lock);
+static DEFINE_MUTEX(kernfs_open_file_mutex);
-struct sysfs_open_dirent {
+struct kernfs_open_node {
atomic_t refcnt;
atomic_t event;
wait_queue_head_t poll;
- struct list_head files; /* goes through sysfs_open_file.list */
+ struct list_head files; /* goes through kernfs_open_file.list */
};
-static struct sysfs_open_file *sysfs_of(struct file *file)
+static struct kernfs_open_file *kernfs_of(struct file *file)
{
return ((struct seq_file *)file->private_data)->private;
}
*/
static const struct kernfs_ops *kernfs_ops(struct kernfs_node *kn)
{
- if (kn->s_flags & SYSFS_FLAG_LOCKDEP)
+ if (kn->flags & KERNFS_LOCKDEP)
lockdep_assert_held(kn);
- return kn->s_attr.ops;
+ return kn->attr.ops;
}
static void *kernfs_seq_start(struct seq_file *sf, loff_t *ppos)
{
- struct sysfs_open_file *of = sf->private;
+ struct kernfs_open_file *of = sf->private;
const struct kernfs_ops *ops;
/*
static void *kernfs_seq_next(struct seq_file *sf, void *v, loff_t *ppos)
{
- struct sysfs_open_file *of = sf->private;
+ struct kernfs_open_file *of = sf->private;
const struct kernfs_ops *ops = kernfs_ops(of->kn);
if (ops->seq_next) {
static void kernfs_seq_stop(struct seq_file *sf, void *v)
{
- struct sysfs_open_file *of = sf->private;
+ struct kernfs_open_file *of = sf->private;
const struct kernfs_ops *ops = kernfs_ops(of->kn);
if (ops->seq_stop)
static int kernfs_seq_show(struct seq_file *sf, void *v)
{
- struct sysfs_open_file *of = sf->private;
+ struct kernfs_open_file *of = sf->private;
- of->event = atomic_read(&of->kn->s_attr.open->event);
+ of->event = atomic_read(&of->kn->attr.open->event);
- return of->kn->s_attr.ops->seq_show(sf, v);
+ return of->kn->attr.ops->seq_show(sf, v);
}
static const struct seq_operations kernfs_seq_ops = {
* it difficult to use seq_file. Implement simplistic custom buffering for
* bin files.
*/
-static ssize_t kernfs_file_direct_read(struct sysfs_open_file *of,
+static ssize_t kernfs_file_direct_read(struct kernfs_open_file *of,
char __user *user_buf, size_t count,
loff_t *ppos)
{
static ssize_t kernfs_file_read(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
- struct sysfs_open_file *of = sysfs_of(file);
+ struct kernfs_open_file *of = kernfs_of(file);
- if (of->kn->s_flags & SYSFS_FLAG_HAS_SEQ_SHOW)
+ if (of->kn->flags & KERNFS_HAS_SEQ_SHOW)
return seq_read(file, user_buf, count, ppos);
else
return kernfs_file_direct_read(of, user_buf, count, ppos);
static ssize_t kernfs_file_write(struct file *file, const char __user *user_buf,
size_t count, loff_t *ppos)
{
- struct sysfs_open_file *of = sysfs_of(file);
+ struct kernfs_open_file *of = kernfs_of(file);
ssize_t len = min_t(size_t, count, PAGE_SIZE);
const struct kernfs_ops *ops;
char *buf;
static void kernfs_vma_open(struct vm_area_struct *vma)
{
struct file *file = vma->vm_file;
- struct sysfs_open_file *of = sysfs_of(file);
+ struct kernfs_open_file *of = kernfs_of(file);
if (!of->vm_ops)
return;
static int kernfs_vma_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
{
struct file *file = vma->vm_file;
- struct sysfs_open_file *of = sysfs_of(file);
+ struct kernfs_open_file *of = kernfs_of(file);
int ret;
if (!of->vm_ops)
struct vm_fault *vmf)
{
struct file *file = vma->vm_file;
- struct sysfs_open_file *of = sysfs_of(file);
+ struct kernfs_open_file *of = kernfs_of(file);
int ret;
if (!of->vm_ops)
void *buf, int len, int write)
{
struct file *file = vma->vm_file;
- struct sysfs_open_file *of = sysfs_of(file);
+ struct kernfs_open_file *of = kernfs_of(file);
int ret;
if (!of->vm_ops)
struct mempolicy *new)
{
struct file *file = vma->vm_file;
- struct sysfs_open_file *of = sysfs_of(file);
+ struct kernfs_open_file *of = kernfs_of(file);
int ret;
if (!of->vm_ops)
unsigned long addr)
{
struct file *file = vma->vm_file;
- struct sysfs_open_file *of = sysfs_of(file);
+ struct kernfs_open_file *of = kernfs_of(file);
struct mempolicy *pol;
if (!of->vm_ops)
unsigned long flags)
{
struct file *file = vma->vm_file;
- struct sysfs_open_file *of = sysfs_of(file);
+ struct kernfs_open_file *of = kernfs_of(file);
int ret;
if (!of->vm_ops)
static int kernfs_file_mmap(struct file *file, struct vm_area_struct *vma)
{
- struct sysfs_open_file *of = sysfs_of(file);
+ struct kernfs_open_file *of = kernfs_of(file);
const struct kernfs_ops *ops;
int rc;
* without grabbing @of->mutex by testing HAS_MMAP flag. See the
* comment in kernfs_file_open() for more details.
*/
- if (!(of->kn->s_flags & SYSFS_FLAG_HAS_MMAP))
+ if (!(of->kn->flags & KERNFS_HAS_MMAP))
return -ENODEV;
mutex_lock(&of->mutex);
}
/**
- * sysfs_get_open_dirent - get or create sysfs_open_dirent
+ * sysfs_get_open_dirent - get or create kernfs_open_node
* @kn: target kernfs_node
- * @of: sysfs_open_file for this instance of open
+ * @of: kernfs_open_file for this instance of open
*
- * If @kn->s_attr.open exists, increment its reference count;
- * otherwise, create one. @of is chained to the files list.
+ * If @kn->attr.open exists, increment its reference count; otherwise,
+ * create one. @of is chained to the files list.
*
* LOCKING:
* Kernel thread context (may sleep).
* 0 on success, -errno on failure.
*/
static int sysfs_get_open_dirent(struct kernfs_node *kn,
- struct sysfs_open_file *of)
+ struct kernfs_open_file *of)
{
- struct sysfs_open_dirent *od, *new_od = NULL;
+ struct kernfs_open_node *on, *new_on = NULL;
retry:
- mutex_lock(&sysfs_open_file_mutex);
- spin_lock_irq(&sysfs_open_dirent_lock);
+ mutex_lock(&kernfs_open_file_mutex);
+ spin_lock_irq(&kernfs_open_node_lock);
- if (!kn->s_attr.open && new_od) {
- kn->s_attr.open = new_od;
- new_od = NULL;
+ if (!kn->attr.open && new_on) {
+ kn->attr.open = new_on;
+ new_on = NULL;
}
- od = kn->s_attr.open;
- if (od) {
- atomic_inc(&od->refcnt);
- list_add_tail(&of->list, &od->files);
+ on = kn->attr.open;
+ if (on) {
+ atomic_inc(&on->refcnt);
+ list_add_tail(&of->list, &on->files);
}
- spin_unlock_irq(&sysfs_open_dirent_lock);
- mutex_unlock(&sysfs_open_file_mutex);
+ spin_unlock_irq(&kernfs_open_node_lock);
+ mutex_unlock(&kernfs_open_file_mutex);
- if (od) {
- kfree(new_od);
+ if (on) {
+ kfree(new_on);
return 0;
}
/* not there, initialize a new one and retry */
- new_od = kmalloc(sizeof(*new_od), GFP_KERNEL);
- if (!new_od)
+ new_on = kmalloc(sizeof(*new_on), GFP_KERNEL);
+ if (!new_on)
return -ENOMEM;
- atomic_set(&new_od->refcnt, 0);
- atomic_set(&new_od->event, 1);
- init_waitqueue_head(&new_od->poll);
- INIT_LIST_HEAD(&new_od->files);
+ atomic_set(&new_on->refcnt, 0);
+ atomic_set(&new_on->event, 1);
+ init_waitqueue_head(&new_on->poll);
+ INIT_LIST_HEAD(&new_on->files);
goto retry;
}
/**
- * sysfs_put_open_dirent - put sysfs_open_dirent
+ * sysfs_put_open_dirent - put kernfs_open_node
* @kn: target kernfs_nodet
- * @of: associated sysfs_open_file
+ * @of: associated kernfs_open_file
*
- * Put @kn->s_attr.open and unlink @of from the files list. If
+ * Put @kn->attr.open and unlink @of from the files list. If
* reference count reaches zero, disassociate and free it.
*
* LOCKING:
* None.
*/
static void sysfs_put_open_dirent(struct kernfs_node *kn,
- struct sysfs_open_file *of)
+ struct kernfs_open_file *of)
{
- struct sysfs_open_dirent *od = kn->s_attr.open;
+ struct kernfs_open_node *on = kn->attr.open;
unsigned long flags;
- mutex_lock(&sysfs_open_file_mutex);
- spin_lock_irqsave(&sysfs_open_dirent_lock, flags);
+ mutex_lock(&kernfs_open_file_mutex);
+ spin_lock_irqsave(&kernfs_open_node_lock, flags);
if (of)
list_del(&of->list);
- if (atomic_dec_and_test(&od->refcnt))
- kn->s_attr.open = NULL;
+ if (atomic_dec_and_test(&on->refcnt))
+ kn->attr.open = NULL;
else
- od = NULL;
+ on = NULL;
- spin_unlock_irqrestore(&sysfs_open_dirent_lock, flags);
- mutex_unlock(&sysfs_open_file_mutex);
+ spin_unlock_irqrestore(&kernfs_open_node_lock, flags);
+ mutex_unlock(&kernfs_open_file_mutex);
- kfree(od);
+ kfree(on);
}
static int kernfs_file_open(struct inode *inode, struct file *file)
{
struct kernfs_node *kn = file->f_path.dentry->d_fsdata;
const struct kernfs_ops *ops;
- struct sysfs_open_file *of;
+ struct kernfs_open_file *of;
bool has_read, has_write, has_mmap;
int error = -EACCES;
(!(inode->i_mode & S_IRUGO) || !has_read))
goto err_out;
- /* allocate a sysfs_open_file for the file */
+ /* allocate a kernfs_open_file for the file */
error = -ENOMEM;
- of = kzalloc(sizeof(struct sysfs_open_file), GFP_KERNEL);
+ of = kzalloc(sizeof(struct kernfs_open_file), GFP_KERNEL);
if (!of)
goto err_out;
static int kernfs_file_release(struct inode *inode, struct file *filp)
{
struct kernfs_node *kn = filp->f_path.dentry->d_fsdata;
- struct sysfs_open_file *of = sysfs_of(filp);
+ struct kernfs_open_file *of = kernfs_of(filp);
sysfs_put_open_dirent(kn, of);
seq_release(inode, filp);
void sysfs_unmap_bin_file(struct kernfs_node *kn)
{
- struct sysfs_open_dirent *od;
- struct sysfs_open_file *of;
+ struct kernfs_open_node *on;
+ struct kernfs_open_file *of;
- if (!(kn->s_flags & SYSFS_FLAG_HAS_MMAP))
+ if (!(kn->flags & KERNFS_HAS_MMAP))
return;
- spin_lock_irq(&sysfs_open_dirent_lock);
- od = kn->s_attr.open;
- if (od)
- atomic_inc(&od->refcnt);
- spin_unlock_irq(&sysfs_open_dirent_lock);
- if (!od)
+ spin_lock_irq(&kernfs_open_node_lock);
+ on = kn->attr.open;
+ if (on)
+ atomic_inc(&on->refcnt);
+ spin_unlock_irq(&kernfs_open_node_lock);
+ if (!on)
return;
- mutex_lock(&sysfs_open_file_mutex);
- list_for_each_entry(of, &od->files, list) {
+ mutex_lock(&kernfs_open_file_mutex);
+ list_for_each_entry(of, &on->files, list) {
struct inode *inode = file_inode(of->file);
unmap_mapping_range(inode->i_mapping, 0, 0, 1);
}
- mutex_unlock(&sysfs_open_file_mutex);
+ mutex_unlock(&kernfs_open_file_mutex);
sysfs_put_open_dirent(kn, NULL);
}
*/
static unsigned int kernfs_file_poll(struct file *filp, poll_table *wait)
{
- struct sysfs_open_file *of = sysfs_of(filp);
+ struct kernfs_open_file *of = kernfs_of(filp);
struct kernfs_node *kn = filp->f_path.dentry->d_fsdata;
- struct sysfs_open_dirent *od = kn->s_attr.open;
+ struct kernfs_open_node *on = kn->attr.open;
/* need parent for the kobj, grab both */
if (!sysfs_get_active(kn))
goto trigger;
- poll_wait(filp, &od->poll, wait);
+ poll_wait(filp, &on->poll, wait);
sysfs_put_active(kn);
- if (of->event != atomic_read(&od->event))
+ if (of->event != atomic_read(&on->event))
goto trigger;
return DEFAULT_POLLMASK;
*/
void kernfs_notify(struct kernfs_node *kn)
{
- struct sysfs_open_dirent *od;
+ struct kernfs_open_node *on;
unsigned long flags;
- spin_lock_irqsave(&sysfs_open_dirent_lock, flags);
+ spin_lock_irqsave(&kernfs_open_node_lock, flags);
- if (!WARN_ON(sysfs_type(kn) != SYSFS_KOBJ_ATTR)) {
- od = kn->s_attr.open;
- if (od) {
- atomic_inc(&od->event);
- wake_up_interruptible(&od->poll);
+ if (!WARN_ON(kernfs_type(kn) != KERNFS_FILE)) {
+ on = kn->attr.open;
+ if (on) {
+ atomic_inc(&on->event);
+ wake_up_interruptible(&on->poll);
}
}
- spin_unlock_irqrestore(&sysfs_open_dirent_lock, flags);
+ spin_unlock_irqrestore(&kernfs_open_node_lock, flags);
}
EXPORT_SYMBOL_GPL(kernfs_notify);
void *priv, const void *ns,
struct lock_class_key *key)
{
- struct sysfs_addrm_cxt acxt;
+ struct kernfs_addrm_cxt acxt;
struct kernfs_node *kn;
int rc;
kn = sysfs_new_dirent(kernfs_root(parent), name,
- (mode & S_IALLUGO) | S_IFREG, SYSFS_KOBJ_ATTR);
+ (mode & S_IALLUGO) | S_IFREG, KERNFS_FILE);
if (!kn)
return ERR_PTR(-ENOMEM);
- kn->s_attr.ops = ops;
- kn->s_attr.size = size;
- kn->s_ns = ns;
+ kn->attr.ops = ops;
+ kn->attr.size = size;
+ kn->ns = ns;
kn->priv = priv;
#ifdef CONFIG_DEBUG_LOCK_ALLOC
if (key) {
lockdep_init_map(&kn->dep_map, "s_active", key, 0);
- kn->s_flags |= SYSFS_FLAG_LOCKDEP;
+ kn->flags |= KERNFS_LOCKDEP;
}
#endif
/*
- * kn->s_attr.ops is accesible only while holding active ref. We
+ * kn->attr.ops is accesible only while holding active ref. We
* need to know whether some ops are implemented outside active
* ref. Cache their existence in flags.
*/
if (ops->seq_show)
- kn->s_flags |= SYSFS_FLAG_HAS_SEQ_SHOW;
+ kn->flags |= KERNFS_HAS_SEQ_SHOW;
if (ops->mmap)
- kn->s_flags |= SYSFS_FLAG_HAS_MMAP;
+ kn->flags |= KERNFS_HAS_MMAP;
sysfs_addrm_start(&acxt);
rc = sysfs_add_one(&acxt, kn, parent);
projects / platform / adaptation / renesas_rcar / renesas_kernel.git / blobdiff