C++ (Cpp) redo_inode_mask Beispiele

Beispiel #1

void __inode_dir_notify(struct inode *inode, unsigned long event)
{
	struct dnotify_struct *	dn;
	struct dnotify_struct **prev;
	struct fown_struct *	fown;
	int			changed = 0;

	write_lock(&dn_lock);
	prev = &inode->i_dnotify;
	while ((dn = *prev) != NULL) {
		if (dn->dn_magic != DNOTIFY_MAGIC) {
		        printk(KERN_ERR "__inode_dir_notify: bad magic "
				"number in dnotify_struct!\n");
		        goto out;
		}
		if ((dn->dn_mask & event) == 0) {
			prev = &dn->dn_next;
			continue;
		}
		fown = &dn->dn_filp->f_owner;
		if (fown->pid)
		        send_sigio(fown, dn->dn_fd, POLL_MSG);
		if (dn->dn_mask & DN_MULTISHOT)
			prev = &dn->dn_next;
		else {
			*prev = dn->dn_next;
			changed = 1;
			kmem_cache_free(dn_cache, dn);
		}
	}
	if (changed)
		redo_inode_mask(inode);
out:
	write_unlock(&dn_lock);
}

Beispiel #2

void __inode_dir_notify(struct inode *inode, unsigned long event)
{
	struct dnotify_struct *	dn;
	struct dnotify_struct **prev;
	struct fown_struct *	fown;
	int			changed = 0;

	spin_lock(&inode->i_lock);
	prev = &inode->i_dnotify;
	while ((dn = *prev) != NULL) {
		if ((dn->dn_mask & event) == 0) {
			prev = &dn->dn_next;
			continue;
		}
		fown = &dn->dn_filp->f_owner;
		send_sigio(fown, dn->dn_fd, POLL_MSG);
		if (dn->dn_mask & DN_MULTISHOT)
			prev = &dn->dn_next;
		else {
			*prev = dn->dn_next;
			changed = 1;
			kmem_cache_free(dn_cache, dn);
		}
	}
	if (changed)
		redo_inode_mask(inode);
	spin_unlock(&inode->i_lock);
}

Beispiel #3

int fcntl_dirnotify(int fd, struct file *filp, unsigned long arg)
{
	struct dnotify_struct *dn = NULL;
	struct dnotify_struct *odn;
	struct dnotify_struct **prev;
	struct inode *inode;
	int turning_off = (arg & ~DN_MULTISHOT) == 0;
	int error = 0;

	if (!turning_off && !dir_notify_enable)
		return -EINVAL;
	inode = filp->f_dentry->d_inode;
	if (!S_ISDIR(inode->i_mode))
		return -ENOTDIR;
	if (!turning_off) {
		dn = kmem_cache_alloc(dn_cache, SLAB_KERNEL);
		if (dn == NULL)
			return -ENOMEM;
	}
	write_lock(&dn_lock);
	prev = &inode->i_dnotify;
	for (odn = *prev; odn != NULL; prev = &odn->dn_next, odn = *prev)
		if (odn->dn_filp == filp)
			break;
	if (odn != NULL) {
		if (turning_off) {
			*prev = odn->dn_next;
			redo_inode_mask(inode);
			dn = odn;
			goto out_free;
		}
		odn->dn_fd = fd;
		odn->dn_mask |= arg;
		inode->i_dnotify_mask |= arg & ~DN_MULTISHOT;
		goto out_free;
	}
	if (turning_off)
		goto out;
	if ((error = security_file_set_fowner(filp)))
		goto out_free;
	filp->f_owner.pid = current->pid;
	filp->f_owner.uid = current->uid;
	filp->f_owner.euid = current->euid;
	dn->dn_magic = DNOTIFY_MAGIC;
	dn->dn_mask = arg;
	dn->dn_fd = fd;
	dn->dn_filp = filp;
	inode->i_dnotify_mask |= arg & ~DN_MULTISHOT;
	dn->dn_next = inode->i_dnotify;
	inode->i_dnotify = dn;
out:
	write_unlock(&dn_lock);
	return error;
out_free:
	kmem_cache_free(dn_cache, dn);
	goto out;
}

Beispiel #4

void dnotify_flush(struct file *filp, fl_owner_t id)
{
	struct dnotify_struct *dn;
	struct dnotify_struct **prev;
	struct inode *inode;

	inode = filp->f_dentry->d_inode;
	if (!S_ISDIR(inode->i_mode))
		return;
	spin_lock(&inode->i_lock);
	prev = &inode->i_dnotify;
	while ((dn = *prev) != NULL) {
		if ((dn->dn_owner == id) && (dn->dn_filp == filp)) {
			*prev = dn->dn_next;
			redo_inode_mask(inode);
			kmem_cache_free(dn_cache, dn);
			break;
		}
		prev = &dn->dn_next;
	}
	spin_unlock(&inode->i_lock);
}