diff options
Diffstat (limited to 'fs/kernfs/file.c')
-rw-r--r-- | fs/kernfs/file.c | 172 |
1 files changed, 86 insertions, 86 deletions
diff --git a/fs/kernfs/file.c b/fs/kernfs/file.c index 5277021196a7..2714a394cd81 100644 --- a/fs/kernfs/file.c +++ b/fs/kernfs/file.c @@ -18,27 +18,27 @@ #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->attr.open points to sysfs_open_dirent. 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; } @@ -56,7 +56,7 @@ static const struct kernfs_ops *kernfs_ops(struct kernfs_node *kn) 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; /* @@ -81,7 +81,7 @@ static void *kernfs_seq_start(struct seq_file *sf, loff_t *ppos) 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) { @@ -98,7 +98,7 @@ static void *kernfs_seq_next(struct seq_file *sf, void *v, loff_t *ppos) 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) @@ -110,7 +110,7 @@ static void kernfs_seq_stop(struct seq_file *sf, void *v) 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->attr.open->event); @@ -130,7 +130,7 @@ 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) { @@ -187,7 +187,7 @@ static ssize_t kernfs_file_direct_read(struct sysfs_open_file *of, 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->flags & SYSFS_FLAG_HAS_SEQ_SHOW) return seq_read(file, user_buf, count, ppos); @@ -214,7 +214,7 @@ static ssize_t kernfs_file_read(struct file *file, char __user *user_buf, 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; @@ -259,7 +259,7 @@ out_free: 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; @@ -276,7 +276,7 @@ static void kernfs_vma_open(struct vm_area_struct *vma) 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) @@ -297,7 +297,7 @@ static int kernfs_vma_page_mkwrite(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) @@ -320,7 +320,7 @@ static int kernfs_vma_access(struct vm_area_struct *vma, unsigned long addr, 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) @@ -342,7 +342,7 @@ static int kernfs_vma_set_policy(struct vm_area_struct *vma, 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) @@ -363,7 +363,7 @@ static struct mempolicy *kernfs_vma_get_policy(struct vm_area_struct *vma, 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) @@ -385,7 +385,7 @@ static int kernfs_vma_migrate(struct vm_area_struct *vma, 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) @@ -417,7 +417,7 @@ static const struct vm_operations_struct kernfs_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; @@ -473,9 +473,9 @@ out_unlock: } /** - * 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->attr.open exists, increment its reference count; otherwise, * create one. @of is chained to the files list. @@ -487,49 +487,49 @@ out_unlock: * 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->attr.open && new_od) { - kn->attr.open = new_od; - new_od = NULL; + if (!kn->attr.open && new_on) { + kn->attr.open = new_on; + new_on = NULL; } - od = kn->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->attr.open and unlink @of from the files list. If * reference count reaches zero, disassociate and free it. @@ -538,33 +538,33 @@ static int sysfs_get_open_dirent(struct kernfs_node *kn, * 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->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)) + 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; @@ -586,9 +586,9 @@ static int kernfs_file_open(struct inode *inode, struct file *file) (!(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; @@ -654,7 +654,7 @@ 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); @@ -665,26 +665,26 @@ static int kernfs_file_release(struct inode *inode, struct file *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->flags & SYSFS_FLAG_HAS_MMAP)) return; - spin_lock_irq(&sysfs_open_dirent_lock); - od = kn->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); } @@ -704,19 +704,19 @@ void sysfs_unmap_bin_file(struct kernfs_node *kn) */ 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->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; @@ -733,20 +733,20 @@ static unsigned int kernfs_file_poll(struct file *filp, poll_table *wait) */ 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->attr.open; - if (od) { - atomic_inc(&od->event); - wake_up_interruptible(&od->poll); + 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); @@ -780,7 +780,7 @@ struct kernfs_node *kernfs_create_file_ns_key(struct kernfs_node *parent, 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; |