/*
* There's one sysfs_open_file for each open file and one sysfs_open_dirent
- * for each sysfs_dirent with one or more open files.
+ * for each kernfs_node with one or more open files.
*
- * sysfs_dirent->s_attr.open points to sysfs_open_dirent. s_attr.open is
+ * kernfs_node->s_attr.open points to sysfs_open_dirent. s_attr.open is
* protected by sysfs_open_dirent_lock.
*
* filp->private_data points to seq_file whose ->private points to
}
/*
- * Determine the kernfs_ops for the given sysfs_dirent. This function must
+ * Determine the kernfs_ops for the given kernfs_node. This function must
* be called while holding an active reference.
*/
-static const struct kernfs_ops *kernfs_ops(struct sysfs_dirent *sd)
+static const struct kernfs_ops *kernfs_ops(struct kernfs_node *kn)
{
- if (sd->s_flags & SYSFS_FLAG_LOCKDEP)
- lockdep_assert_held(sd);
- return sd->s_attr.ops;
+ if (kn->s_flags & SYSFS_FLAG_LOCKDEP)
+ lockdep_assert_held(kn);
+ return kn->s_attr.ops;
}
static void *kernfs_seq_start(struct seq_file *sf, loff_t *ppos)
* the ops aren't called concurrently for the same open file.
*/
mutex_lock(&of->mutex);
- if (!sysfs_get_active(of->sd))
+ if (!sysfs_get_active(of->kn))
return ERR_PTR(-ENODEV);
- ops = kernfs_ops(of->sd);
+ ops = kernfs_ops(of->kn);
if (ops->seq_start) {
return ops->seq_start(sf, ppos);
} else {
static void *kernfs_seq_next(struct seq_file *sf, void *v, loff_t *ppos)
{
struct sysfs_open_file *of = sf->private;
- const struct kernfs_ops *ops = kernfs_ops(of->sd);
+ const struct kernfs_ops *ops = kernfs_ops(of->kn);
if (ops->seq_next) {
return ops->seq_next(sf, v, ppos);
static void kernfs_seq_stop(struct seq_file *sf, void *v)
{
struct sysfs_open_file *of = sf->private;
- const struct kernfs_ops *ops = kernfs_ops(of->sd);
+ const struct kernfs_ops *ops = kernfs_ops(of->kn);
if (ops->seq_stop)
ops->seq_stop(sf, v);
- sysfs_put_active(of->sd);
+ sysfs_put_active(of->kn);
mutex_unlock(&of->mutex);
}
{
struct sysfs_open_file *of = sf->private;
- of->event = atomic_read(&of->sd->s_attr.open->event);
+ of->event = atomic_read(&of->kn->s_attr.open->event);
- return of->sd->s_attr.ops->seq_show(sf, v);
+ return of->kn->s_attr.ops->seq_show(sf, v);
}
static const struct seq_operations kernfs_seq_ops = {
* the ops aren't called concurrently for the same open file.
*/
mutex_lock(&of->mutex);
- if (!sysfs_get_active(of->sd)) {
+ if (!sysfs_get_active(of->kn)) {
len = -ENODEV;
mutex_unlock(&of->mutex);
goto out_free;
}
- ops = kernfs_ops(of->sd);
+ ops = kernfs_ops(of->kn);
if (ops->read)
len = ops->read(of, buf, len, *ppos);
else
len = -EINVAL;
- sysfs_put_active(of->sd);
+ sysfs_put_active(of->kn);
mutex_unlock(&of->mutex);
if (len < 0)
{
struct sysfs_open_file *of = sysfs_of(file);
- if (of->sd->s_flags & SYSFS_FLAG_HAS_SEQ_SHOW)
+ if (of->kn->s_flags & SYSFS_FLAG_HAS_SEQ_SHOW)
return seq_read(file, user_buf, count, ppos);
else
return kernfs_file_direct_read(of, user_buf, count, ppos);
* the ops aren't called concurrently for the same open file.
*/
mutex_lock(&of->mutex);
- if (!sysfs_get_active(of->sd)) {
+ if (!sysfs_get_active(of->kn)) {
mutex_unlock(&of->mutex);
len = -ENODEV;
goto out_free;
}
- ops = kernfs_ops(of->sd);
+ ops = kernfs_ops(of->kn);
if (ops->write)
len = ops->write(of, buf, len, *ppos);
else
len = -EINVAL;
- sysfs_put_active(of->sd);
+ sysfs_put_active(of->kn);
mutex_unlock(&of->mutex);
if (len > 0)
if (!of->vm_ops)
return;
- if (!sysfs_get_active(of->sd))
+ if (!sysfs_get_active(of->kn))
return;
if (of->vm_ops->open)
of->vm_ops->open(vma);
- sysfs_put_active(of->sd);
+ sysfs_put_active(of->kn);
}
static int kernfs_vma_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
if (!of->vm_ops)
return VM_FAULT_SIGBUS;
- if (!sysfs_get_active(of->sd))
+ if (!sysfs_get_active(of->kn))
return VM_FAULT_SIGBUS;
ret = VM_FAULT_SIGBUS;
if (of->vm_ops->fault)
ret = of->vm_ops->fault(vma, vmf);
- sysfs_put_active(of->sd);
+ sysfs_put_active(of->kn);
return ret;
}
if (!of->vm_ops)
return VM_FAULT_SIGBUS;
- if (!sysfs_get_active(of->sd))
+ if (!sysfs_get_active(of->kn))
return VM_FAULT_SIGBUS;
ret = 0;
else
file_update_time(file);
- sysfs_put_active(of->sd);
+ sysfs_put_active(of->kn);
return ret;
}
if (!of->vm_ops)
return -EINVAL;
- if (!sysfs_get_active(of->sd))
+ if (!sysfs_get_active(of->kn))
return -EINVAL;
ret = -EINVAL;
if (of->vm_ops->access)
ret = of->vm_ops->access(vma, addr, buf, len, write);
- sysfs_put_active(of->sd);
+ sysfs_put_active(of->kn);
return ret;
}
if (!of->vm_ops)
return 0;
- if (!sysfs_get_active(of->sd))
+ if (!sysfs_get_active(of->kn))
return -EINVAL;
ret = 0;
if (of->vm_ops->set_policy)
ret = of->vm_ops->set_policy(vma, new);
- sysfs_put_active(of->sd);
+ sysfs_put_active(of->kn);
return ret;
}
if (!of->vm_ops)
return vma->vm_policy;
- if (!sysfs_get_active(of->sd))
+ if (!sysfs_get_active(of->kn))
return vma->vm_policy;
pol = vma->vm_policy;
if (of->vm_ops->get_policy)
pol = of->vm_ops->get_policy(vma, addr);
- sysfs_put_active(of->sd);
+ sysfs_put_active(of->kn);
return pol;
}
if (!of->vm_ops)
return 0;
- if (!sysfs_get_active(of->sd))
+ if (!sysfs_get_active(of->kn))
return 0;
ret = 0;
if (of->vm_ops->migrate)
ret = of->vm_ops->migrate(vma, from, to, flags);
- sysfs_put_active(of->sd);
+ sysfs_put_active(of->kn);
return ret;
}
#endif
* without grabbing @of->mutex by testing HAS_MMAP flag. See the
* comment in kernfs_file_open() for more details.
*/
- if (!(of->sd->s_flags & SYSFS_FLAG_HAS_MMAP))
+ if (!(of->kn->s_flags & SYSFS_FLAG_HAS_MMAP))
return -ENODEV;
mutex_lock(&of->mutex);
rc = -ENODEV;
- if (!sysfs_get_active(of->sd))
+ if (!sysfs_get_active(of->kn))
goto out_unlock;
- ops = kernfs_ops(of->sd);
+ ops = kernfs_ops(of->kn);
rc = ops->mmap(of, vma);
/*
of->vm_ops = vma->vm_ops;
vma->vm_ops = &kernfs_vm_ops;
out_put:
- sysfs_put_active(of->sd);
+ sysfs_put_active(of->kn);
out_unlock:
mutex_unlock(&of->mutex);
/**
* sysfs_get_open_dirent - get or create sysfs_open_dirent
- * @sd: target sysfs_dirent
+ * @kn: target kernfs_node
* @of: sysfs_open_file for this instance of open
*
- * If @sd->s_attr.open exists, increment its reference count;
+ * If @kn->s_attr.open exists, increment its reference count;
* otherwise, create one. @of is chained to the files list.
*
* LOCKING:
* RETURNS:
* 0 on success, -errno on failure.
*/
-static int sysfs_get_open_dirent(struct sysfs_dirent *sd,
+static int sysfs_get_open_dirent(struct kernfs_node *kn,
struct sysfs_open_file *of)
{
struct sysfs_open_dirent *od, *new_od = NULL;
mutex_lock(&sysfs_open_file_mutex);
spin_lock_irq(&sysfs_open_dirent_lock);
- if (!sd->s_attr.open && new_od) {
- sd->s_attr.open = new_od;
+ if (!kn->s_attr.open && new_od) {
+ kn->s_attr.open = new_od;
new_od = NULL;
}
- od = sd->s_attr.open;
+ od = kn->s_attr.open;
if (od) {
atomic_inc(&od->refcnt);
list_add_tail(&of->list, &od->files);
/**
* sysfs_put_open_dirent - put sysfs_open_dirent
- * @sd: target sysfs_dirent
+ * @kn: target kernfs_nodet
* @of: associated sysfs_open_file
*
- * Put @sd->s_attr.open and unlink @of from the files list. If
+ * Put @kn->s_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 sysfs_dirent *sd,
+static void sysfs_put_open_dirent(struct kernfs_node *kn,
struct sysfs_open_file *of)
{
- struct sysfs_open_dirent *od = sd->s_attr.open;
+ struct sysfs_open_dirent *od = kn->s_attr.open;
unsigned long flags;
mutex_lock(&sysfs_open_file_mutex);
list_del(&of->list);
if (atomic_dec_and_test(&od->refcnt))
- sd->s_attr.open = NULL;
+ kn->s_attr.open = NULL;
else
od = NULL;
static int kernfs_file_open(struct inode *inode, struct file *file)
{
- struct sysfs_dirent *attr_sd = file->f_path.dentry->d_fsdata;
+ struct kernfs_node *kn = file->f_path.dentry->d_fsdata;
const struct kernfs_ops *ops;
struct sysfs_open_file *of;
bool has_read, has_write, has_mmap;
int error = -EACCES;
- if (!sysfs_get_active(attr_sd))
+ if (!sysfs_get_active(kn))
return -ENODEV;
- ops = kernfs_ops(attr_sd);
+ ops = kernfs_ops(kn);
has_read = ops->seq_show || ops->read || ops->mmap;
has_write = ops->write || ops->mmap;
else
mutex_init(&of->mutex);
- of->sd = attr_sd;
+ of->kn = kn;
of->file = file;
/*
file->f_mode |= FMODE_PWRITE;
/* make sure we have open dirent struct */
- error = sysfs_get_open_dirent(attr_sd, of);
+ error = sysfs_get_open_dirent(kn, of);
if (error)
goto err_close;
/* open succeeded, put active references */
- sysfs_put_active(attr_sd);
+ sysfs_put_active(kn);
return 0;
err_close:
err_free:
kfree(of);
err_out:
- sysfs_put_active(attr_sd);
+ sysfs_put_active(kn);
return error;
}
static int kernfs_file_release(struct inode *inode, struct file *filp)
{
- struct sysfs_dirent *sd = filp->f_path.dentry->d_fsdata;
+ struct kernfs_node *kn = filp->f_path.dentry->d_fsdata;
struct sysfs_open_file *of = sysfs_of(filp);
- sysfs_put_open_dirent(sd, of);
+ sysfs_put_open_dirent(kn, of);
seq_release(inode, filp);
kfree(of);
return 0;
}
-void sysfs_unmap_bin_file(struct sysfs_dirent *sd)
+void sysfs_unmap_bin_file(struct kernfs_node *kn)
{
struct sysfs_open_dirent *od;
struct sysfs_open_file *of;
- if (!(sd->s_flags & SYSFS_FLAG_HAS_MMAP))
+ if (!(kn->s_flags & SYSFS_FLAG_HAS_MMAP))
return;
spin_lock_irq(&sysfs_open_dirent_lock);
- od = sd->s_attr.open;
+ od = kn->s_attr.open;
if (od)
atomic_inc(&od->refcnt);
spin_unlock_irq(&sysfs_open_dirent_lock);
}
mutex_unlock(&sysfs_open_file_mutex);
- sysfs_put_open_dirent(sd, NULL);
+ sysfs_put_open_dirent(kn, NULL);
}
/* Sysfs attribute files are pollable. The idea is that you read
static unsigned int kernfs_file_poll(struct file *filp, poll_table *wait)
{
struct sysfs_open_file *of = sysfs_of(filp);
- struct sysfs_dirent *attr_sd = filp->f_path.dentry->d_fsdata;
- struct sysfs_open_dirent *od = attr_sd->s_attr.open;
+ struct kernfs_node *kn = filp->f_path.dentry->d_fsdata;
+ struct sysfs_open_dirent *od = kn->s_attr.open;
/* need parent for the kobj, grab both */
- if (!sysfs_get_active(attr_sd))
+ if (!sysfs_get_active(kn))
goto trigger;
poll_wait(filp, &od->poll, wait);
- sysfs_put_active(attr_sd);
+ sysfs_put_active(kn);
if (of->event != atomic_read(&od->event))
goto trigger;
/**
* kernfs_notify - notify a kernfs file
- * @sd: file to notify
+ * @kn: file to notify
*
- * Notify @sd such that poll(2) on @sd wakes up.
+ * Notify @kn such that poll(2) on @kn wakes up.
*/
-void kernfs_notify(struct sysfs_dirent *sd)
+void kernfs_notify(struct kernfs_node *kn)
{
struct sysfs_open_dirent *od;
unsigned long flags;
spin_lock_irqsave(&sysfs_open_dirent_lock, flags);
- if (!WARN_ON(sysfs_type(sd) != SYSFS_KOBJ_ATTR)) {
- od = sd->s_attr.open;
+ 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);
*
* Returns the created node on success, ERR_PTR() value on error.
*/
-struct sysfs_dirent *kernfs_create_file_ns_key(struct sysfs_dirent *parent,
- const char *name,
- umode_t mode, loff_t size,
- const struct kernfs_ops *ops,
- void *priv, const void *ns,
- struct lock_class_key *key)
+struct kernfs_node *kernfs_create_file_ns_key(struct kernfs_node *parent,
+ const char *name,
+ umode_t mode, loff_t size,
+ const struct kernfs_ops *ops,
+ void *priv, const void *ns,
+ struct lock_class_key *key)
{
struct sysfs_addrm_cxt acxt;
- struct sysfs_dirent *sd;
+ struct kernfs_node *kn;
int rc;
- sd = sysfs_new_dirent(kernfs_root(parent), name,
+ kn = sysfs_new_dirent(kernfs_root(parent), name,
(mode & S_IALLUGO) | S_IFREG, SYSFS_KOBJ_ATTR);
- if (!sd)
+ if (!kn)
return ERR_PTR(-ENOMEM);
- sd->s_attr.ops = ops;
- sd->s_attr.size = size;
- sd->s_ns = ns;
- sd->priv = priv;
+ kn->s_attr.ops = ops;
+ kn->s_attr.size = size;
+ kn->s_ns = ns;
+ kn->priv = priv;
#ifdef CONFIG_DEBUG_LOCK_ALLOC
if (key) {
- lockdep_init_map(&sd->dep_map, "s_active", key, 0);
- sd->s_flags |= SYSFS_FLAG_LOCKDEP;
+ lockdep_init_map(&kn->dep_map, "s_active", key, 0);
+ kn->s_flags |= SYSFS_FLAG_LOCKDEP;
}
#endif
/*
- * sd->s_attr.ops is accesible only while holding active ref. We
+ * kn->s_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)
- sd->s_flags |= SYSFS_FLAG_HAS_SEQ_SHOW;
+ kn->s_flags |= SYSFS_FLAG_HAS_SEQ_SHOW;
if (ops->mmap)
- sd->s_flags |= SYSFS_FLAG_HAS_MMAP;
+ kn->s_flags |= SYSFS_FLAG_HAS_MMAP;
sysfs_addrm_start(&acxt);
- rc = sysfs_add_one(&acxt, sd, parent);
+ rc = sysfs_add_one(&acxt, kn, parent);
sysfs_addrm_finish(&acxt);
if (rc) {
- kernfs_put(sd);
+ kernfs_put(kn);
return ERR_PTR(rc);
}
- return sd;
+ return kn;
}
projects / platform / adaptation / renesas_rcar / renesas_kernel.git / blobdiff