diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/include/lustre_linkea.h')
| -rw-r--r-- | drivers/staging/lustre/lustre/include/lustre_linkea.h | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/drivers/staging/lustre/lustre/include/lustre_linkea.h b/drivers/staging/lustre/lustre/include/lustre_linkea.h new file mode 100644 index 000000000000..5790be913bf6 --- /dev/null +++ b/drivers/staging/lustre/lustre/include/lustre_linkea.h @@ -0,0 +1,57 @@ +/* + * GPL HEADER START + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 only, + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License version 2 for more details (a copy is included + * in the LICENSE file that accompanied this code). + * + * You should have received a copy of the GNU General Public License + * version 2 along with this program; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 021110-1307, USA + * + * GPL HEADER END + */ +/* + * Copyright (c) 2013, Intel Corporation. + * Use is subject to license terms. + * + * Author: di wang <di.wang@intel.com> + */ + +struct linkea_data { + /** + * Buffer to keep link EA body. + */ + struct lu_buf *ld_buf; + /** + * The matched header, entry and its lenght in the EA + */ + struct link_ea_header *ld_leh; + struct link_ea_entry *ld_lee; + int ld_reclen; +}; + +int linkea_data_new(struct linkea_data *ldata, struct lu_buf *buf); +int linkea_init(struct linkea_data *ldata); +void linkea_entry_unpack(const struct link_ea_entry *lee, int *reclen, + struct lu_name *lname, struct lu_fid *pfid); +int linkea_add_buf(struct linkea_data *ldata, const struct lu_name *lname, + const struct lu_fid *pfid); +void linkea_del_buf(struct linkea_data *ldata, const struct lu_name *lname); +int linkea_links_find(struct linkea_data *ldata, const struct lu_name *lname, + const struct lu_fid *pfid); + +#define LINKEA_NEXT_ENTRY(ldata) \ + (struct link_ea_entry *)((char *)ldata.ld_lee + ldata.ld_reclen) + +#define LINKEA_FIRST_ENTRY(ldata) \ + (struct link_ea_entry *)(ldata.ld_leh + 1) |