C++ (Cpp) GFS2_EA_BH2FIRST Exemples

Exemple #1

Fichier : inode.c Projet : AlexShiLucky/linux

static void gfs2_init_xattr(struct gfs2_inode *ip)
{
	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
	struct buffer_head *bh;
	struct gfs2_ea_header *ea;

	bh = gfs2_meta_new(ip->i_gl, ip->i_eattr);
	gfs2_trans_add_meta(ip->i_gl, bh);
	gfs2_metatype_set(bh, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
	gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header));

	ea = GFS2_EA_BH2FIRST(bh);
	ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
	ea->ea_type = GFS2_EATYPE_UNUSED;
	ea->ea_flags = GFS2_EAFLAG_LAST;

	brelse(bh);
}

Exemple #2

static int ea_foreach_i(struct gfs2_inode *ip, struct buffer_head *bh,
			ea_call_t ea_call, void *data)
{
	struct gfs2_ea_header *ea, *prev = NULL;
	int error = 0;

	if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_EA))
		return -EIO;

	for (ea = GFS2_EA_BH2FIRST(bh);; prev = ea, ea = GFS2_EA2NEXT(ea)) {
		if (!GFS2_EA_REC_LEN(ea))
			goto fail;
		if (!(bh->b_data <= (char *)ea && (char *)GFS2_EA2NEXT(ea) <=
						  bh->b_data + bh->b_size))
			goto fail;
		if (!GFS2_EATYPE_VALID(ea->ea_type))
			goto fail;

		error = ea_call(ip, bh, ea, prev, data);
		if (error)
			return error;

		if (GFS2_EA_IS_LAST(ea)) {
			if ((char *)GFS2_EA2NEXT(ea) !=
			    bh->b_data + bh->b_size)
				goto fail;
			break;
		}
	}

	return error;

fail:
	gfs2_consist_inode(ip);
	return -EIO;
}