Ejemplos de zfs_sa_set_xattr en C++ (Cpp)

Ejemplo n.º 1

Archivo: zpl_xattr.c Proyecto: krichter722/zfs

static int
zpl_xattr_set_sa(struct inode *ip, const char *name, const void *value,
    size_t size, int flags, cred_t *cr)
{
	znode_t *zp = ITOZ(ip);
	nvlist_t *nvl;
	size_t sa_size;
	int error = 0;

	mutex_enter(&zp->z_lock);
	if (zp->z_xattr_cached == NULL)
		error = -zfs_sa_get_xattr(zp);
	mutex_exit(&zp->z_lock);

	if (error)
		return (error);

	ASSERT(zp->z_xattr_cached);
	nvl = zp->z_xattr_cached;

	if (value == NULL) {
		error = -nvlist_remove(nvl, name, DATA_TYPE_BYTE_ARRAY);
		if (error == -ENOENT)
			error = zpl_xattr_set_dir(ip, name, NULL, 0, flags, cr);
	} else {
		/* Limited to 32k to keep nvpair memory allocations small */
		if (size > DXATTR_MAX_ENTRY_SIZE)
			return (-EFBIG);

		/* Prevent the DXATTR SA from consuming the entire SA region */
		error = -nvlist_size(nvl, &sa_size, NV_ENCODE_XDR);
		if (error)
			return (error);

		if (sa_size > DXATTR_MAX_SA_SIZE)
			return (-EFBIG);

		error = -nvlist_add_byte_array(nvl, name,
		    (uchar_t *)value, size);
	}

	/*
	 * Update the SA for additions, modifications, and removals. On
	 * error drop the inconsistent cached version of the nvlist, it
	 * will be reconstructed from the ARC when next accessed.
	 */
	if (error == 0)
		error = -zfs_sa_set_xattr(zp);

	if (error) {
		nvlist_free(nvl);
		zp->z_xattr_cached = NULL;
	}

	ASSERT3S(error, <=, 0);

	return (error);
}

Ejemplo n.º 2

Archivo: zpl_xattr.c Proyecto: mschirmacher/zfs

static int
zpl_xattr_set_sa(struct inode *ip, const char *name, const void *value,
    size_t size, int flags, cred_t *cr)
{
	znode_t *zp = ITOZ(ip);
	nvlist_t *nvl;
	size_t sa_size;
	int error;

	ASSERT(zp->z_xattr_cached);
	nvl = zp->z_xattr_cached;

	if (value == NULL) {
		error = -nvlist_remove(nvl, name, DATA_TYPE_BYTE_ARRAY);
		if (error == -ENOENT)
			error = zpl_xattr_set_dir(ip, name, NULL, 0, flags, cr);
	} else {
		/* Do not allow SA xattrs in symlinks (issue #1648) */
		if (S_ISLNK(ip->i_mode))
			return (-EMLINK);

		/* Limited to 32k to keep nvpair memory allocations small */
		if (size > DXATTR_MAX_ENTRY_SIZE)
			return (-EFBIG);

		/* Prevent the DXATTR SA from consuming the entire SA region */
		error = -nvlist_size(nvl, &sa_size, NV_ENCODE_XDR);
		if (error)
			return (error);

		if (sa_size > DXATTR_MAX_SA_SIZE)
			return (-EFBIG);

		error = -nvlist_add_byte_array(nvl, name,
		    (uchar_t *)value, size);
		if (error)
			return (error);
	}

	/* Update the SA for additions, modifications, and removals. */
	if (!error)
		error = -zfs_sa_set_xattr(zp);

	ASSERT3S(error, <=, 0);

	return (error);
}