diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/include/lustre_linkea.h')
| -rw-r--r-- | drivers/staging/lustre/lustre/include/lustre_linkea.h | 93 |
1 files changed, 0 insertions, 93 deletions
diff --git a/drivers/staging/lustre/lustre/include/lustre_linkea.h b/drivers/staging/lustre/lustre/include/lustre_linkea.h deleted file mode 100644 index 03db1511bfd3..000000000000 --- a/drivers/staging/lustre/lustre/include/lustre_linkea.h +++ /dev/null @@ -1,93 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * 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, see - * http://www.gnu.org/licenses/gpl-2.0.html - * - * GPL HEADER END - */ -/* - * Copyright (c) 2013, 2014, Intel Corporation. - * Use is subject to license terms. - * - * Author: di wang <di.wang@intel.com> - */ - -/* There are several reasons to restrict the linkEA size: - * - * 1. Under DNE mode, if we do not restrict the linkEA size, and if there - * are too many cross-MDTs hard links to the same object, then it will - * casue the llog overflow. - * - * 2. Some backend has limited size for EA. For example, if without large - * EA enabled, the ldiskfs will make all EAs to share one (4K) EA block. - * - * 3. Too many entries in linkEA will seriously affect linkEA performance - * because we only support to locate linkEA entry consecutively. - */ -#define MAX_LINKEA_SIZE 4096 - -struct linkea_data { - /** - * Buffer to keep link EA body. - */ - struct lu_buf *ld_buf; - /** - * The matched header, entry and its length 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); -int linkea_init_with_rec(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_entry_pack(struct link_ea_entry *lee, const struct lu_name *lname, - const 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); - -static inline void linkea_first_entry(struct linkea_data *ldata) -{ - LASSERT(ldata); - LASSERT(ldata->ld_leh); - - if (ldata->ld_leh->leh_reccount == 0) - ldata->ld_lee = NULL; - else - ldata->ld_lee = (struct link_ea_entry *)(ldata->ld_leh + 1); -} - -static inline void linkea_next_entry(struct linkea_data *ldata) -{ - LASSERT(ldata); - LASSERT(ldata->ld_leh); - - if (ldata->ld_lee) { - ldata->ld_lee = (struct link_ea_entry *)((char *)ldata->ld_lee + - ldata->ld_reclen); - if ((char *)ldata->ld_lee >= ((char *)ldata->ld_leh + - ldata->ld_leh->leh_len)) - ldata->ld_lee = NULL; - } -} |