| /* |
| * 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) 2007, 2010, Oracle and/or its affiliates. All rights reserved. |
| * Use is subject to license terms. |
| * |
| * Copyright (c) 2011, 2014, Intel Corporation. |
| * |
| * Copyright 2015 Cray Inc, all rights reserved. |
| * Author: Ben Evans. |
| * |
| * Define lu_seq_range associated functions |
| */ |
| |
| #ifndef _SEQ_RANGE_H_ |
| #define _SEQ_RANGE_H_ |
| |
| #include <uapi/linux/lustre/lustre_idl.h> |
| |
| /** |
| * computes the sequence range type \a range |
| */ |
| |
| static inline unsigned int fld_range_type(const struct lu_seq_range *range) |
| { |
| return range->lsr_flags & LU_SEQ_RANGE_MASK; |
| } |
| |
| /** |
| * Is this sequence range an OST? \a range |
| */ |
| |
| static inline bool fld_range_is_ost(const struct lu_seq_range *range) |
| { |
| return fld_range_type(range) == LU_SEQ_RANGE_OST; |
| } |
| |
| /** |
| * Is this sequence range an MDT? \a range |
| */ |
| |
| static inline bool fld_range_is_mdt(const struct lu_seq_range *range) |
| { |
| return fld_range_type(range) == LU_SEQ_RANGE_MDT; |
| } |
| |
| /** |
| * ANY range is only used when the fld client sends a fld query request, |
| * but it does not know whether the seq is an MDT or OST, so it will send the |
| * request with ANY type, which means any seq type from the lookup can be |
| * expected. /a range |
| */ |
| static inline unsigned int fld_range_is_any(const struct lu_seq_range *range) |
| { |
| return fld_range_type(range) == LU_SEQ_RANGE_ANY; |
| } |
| |
| /** |
| * Apply flags to range \a range \a flags |
| */ |
| |
| static inline void fld_range_set_type(struct lu_seq_range *range, |
| unsigned int flags) |
| { |
| range->lsr_flags |= flags; |
| } |
| |
| /** |
| * Add MDT to range type \a range |
| */ |
| |
| static inline void fld_range_set_mdt(struct lu_seq_range *range) |
| { |
| fld_range_set_type(range, LU_SEQ_RANGE_MDT); |
| } |
| |
| /** |
| * Add OST to range type \a range |
| */ |
| |
| static inline void fld_range_set_ost(struct lu_seq_range *range) |
| { |
| fld_range_set_type(range, LU_SEQ_RANGE_OST); |
| } |
| |
| /** |
| * Add ANY to range type \a range |
| */ |
| |
| static inline void fld_range_set_any(struct lu_seq_range *range) |
| { |
| fld_range_set_type(range, LU_SEQ_RANGE_ANY); |
| } |
| |
| /** |
| * computes width of given sequence range \a range |
| */ |
| |
| static inline u64 lu_seq_range_space(const struct lu_seq_range *range) |
| { |
| return range->lsr_end - range->lsr_start; |
| } |
| |
| /** |
| * initialize range to zero \a range |
| */ |
| |
| static inline void lu_seq_range_init(struct lu_seq_range *range) |
| { |
| memset(range, 0, sizeof(*range)); |
| } |
| |
| /** |
| * check if given seq id \a s is within given range \a range |
| */ |
| |
| static inline bool lu_seq_range_within(const struct lu_seq_range *range, |
| u64 seq) |
| { |
| return seq >= range->lsr_start && seq < range->lsr_end; |
| } |
| |
| /** |
| * Is the range sane? Is the end after the beginning? \a range |
| */ |
| |
| static inline bool lu_seq_range_is_sane(const struct lu_seq_range *range) |
| { |
| return range->lsr_end >= range->lsr_start; |
| } |
| |
| /** |
| * Is the range 0? \a range |
| */ |
| |
| static inline bool lu_seq_range_is_zero(const struct lu_seq_range *range) |
| { |
| return range->lsr_start == 0 && range->lsr_end == 0; |
| } |
| |
| /** |
| * Is the range out of space? \a range |
| */ |
| |
| static inline bool lu_seq_range_is_exhausted(const struct lu_seq_range *range) |
| { |
| return lu_seq_range_space(range) == 0; |
| } |
| |
| /** |
| * return 0 if two ranges have the same location, nonzero if they are |
| * different \a r1 \a r2 |
| */ |
| |
| static inline int lu_seq_range_compare_loc(const struct lu_seq_range *r1, |
| const struct lu_seq_range *r2) |
| { |
| return r1->lsr_index != r2->lsr_index || |
| r1->lsr_flags != r2->lsr_flags; |
| } |
| |
| #if !defined(__REQ_LAYOUT_USER__) |
| /** |
| * byte swap range structure \a range |
| */ |
| |
| void lustre_swab_lu_seq_range(struct lu_seq_range *range); |
| #endif |
| /** |
| * printf string and argument list for sequence range |
| */ |
| #define DRANGE "[%#16.16llx-%#16.16llx]:%x:%s" |
| |
| #define PRANGE(range) \ |
| (range)->lsr_start, \ |
| (range)->lsr_end, \ |
| (range)->lsr_index, \ |
| fld_range_is_mdt(range) ? "mdt" : "ost" |
| |
| #endif |