1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #ifndef _RDC_BITMAP_H 27 #define _RDC_BITMAP_H 28 29 #ifdef __cplusplus 30 extern "C" { 31 #endif 32 33 #ifdef _KERNEL 34 35 extern int rdc_bitmap_mode; /* property from rdc.conf */ 36 37 /* 38 * Possible values of rdc_bitmap_mode - integer flag. 39 */ 40 #define RDC_BMP_AUTO 0x0 /* auto detect bitmap mode */ 41 #define RDC_BMP_ALWAYS 0x1 /* always write the bitmap */ 42 #define RDC_BMP_NEVER 0x2 /* never write the bitmap */ 43 44 #endif /* _KERNEL */ 45 46 /* 47 * Public bitmap interface 48 * The bitmaps are maintained on 32 Kbyte segments 49 */ 50 51 #define LOG_SHFT 15 52 #define IND_BYTE(ind) ((ind) >> 3) 53 #define IND_BIT(ind) (1 << ((ind) & 0x7)) 54 55 #define FBA_LOG_SHFT (LOG_SHFT - FBA_SHFT) 56 #define FBA_TO_LOG_NUM(x) ((x) >> FBA_LOG_SHFT) 57 #define LOG_TO_FBA_NUM(x) ((x) << FBA_LOG_SHFT) 58 #define FBA_TO_LOG_LEN(x) (FBA_TO_LOG_NUM((x)-1) + 1) 59 60 #define BMAP_LOG_BYTES(fbas) (IND_BYTE(FBA_TO_LOG_NUM((fbas)-1))+1) 61 62 #define BITS_IN_BYTE 8 63 64 /* 65 * Private macros for bitmap manipulation 66 */ 67 68 #define BMAP_BIT_SET(bmap, ind) ((bmap)[IND_BYTE(ind)] |= IND_BIT(ind)) 69 #define BMAP_BIT_CLR(bmap, ind) ((bmap)[IND_BYTE(ind)] &= ~IND_BIT(ind)) 70 #define BMAP_BIT_ISSET(bmap, ind) \ 71 ((bmap)[IND_BYTE(ind)] & IND_BIT(ind)) 72 73 #define BIT_TO_FBA(b) (FBA_NUM(b) >> 3) 74 75 #define BMAP_REF_SET(krdc, ind) (((krdc)->bm_refs->bmap_ref_set)(krdc, ind)) 76 #define BMAP_REF_CLR(krdc, ind) (((krdc)->bm_refs->bmap_ref_clr)(krdc, ind)) 77 #define BMAP_REF_ISSET(krdc, ind) (((krdc)->bm_refs->bmap_ref_isset)(krdc, ind)) 78 #define BMAP_REF_FORCE(krdc, ind, val) \ 79 (((krdc)->bm_refs->bmap_ref_force)(krdc, ind, val)) 80 #define BMAP_REF_MAXVAL(krdc) (((krdc)->bm_refs->bmap_ref_maxval)(krdc)) 81 #define BMAP_REF_SIZE(krdc) ((krdc)->bm_refs->bmap_ref_size) 82 #define BMAP_REF_PREF_SIZE (sizeof (unsigned int)) 83 84 #ifndef _KERNEL 85 86 struct bm_ref_ops { 87 void (*bmap_ref_set)(void *, int); 88 void (*bmap_ref_clr)(void *, int); 89 unsigned int (*bmap_ref_isset)(void *, int); 90 void (*bmap_ref_force)(void *, int, unsigned int); 91 unsigned int (*bmap_ref_maxval)(void *); 92 size_t bmap_ref_size; 93 }; 94 95 #else 96 97 struct bm_ref_ops { 98 void (*bmap_ref_set)(rdc_k_info_t *, int); 99 void (*bmap_ref_clr)(rdc_k_info_t *, int); 100 unsigned int (*bmap_ref_isset)(rdc_k_info_t *, int); 101 void (*bmap_ref_force)(rdc_k_info_t *, int, unsigned int); 102 unsigned int (*bmap_ref_maxval)(rdc_k_info_t *); 103 size_t bmap_ref_size; 104 }; 105 106 107 /* convert fba to block number */ 108 #define _BNUM(x) (FBA_TO_LOG_NUM(x)) 109 110 /* force reference clear during sync */ 111 #define RDC_BIT_BUMP 0x0 112 #define RDC_BIT_FORCE 0x1 113 #define RDC_BIT_FLUSHER 0x2 114 115 /* check for overlap, taking account of blocking factor */ 116 #define RDC_OVERLAP(p1, l1, p2, l2) \ 117 ((_BNUM(((p1) + (l1) - 1)) >= _BNUM((p2))) && \ 118 (_BNUM((p1)) <= _BNUM(((p2) + (l2) - 1)))) 119 120 struct rdc_bitmap_ops { 121 int (*set_bitmap)(rdc_k_info_t *, const nsc_off_t, const nsc_size_t, 122 uint_t *); 123 void (*clr_bitmap)(rdc_k_info_t *, const nsc_off_t, const nsc_size_t, 124 const uint_t, const int); 125 int (*count_dirty)(rdc_k_info_t *); 126 int (*bit_isset)(rdc_k_info_t *, const int); 127 int (*fill_bitmap)(rdc_k_info_t *, const int); 128 void (*zero_bitmap)(rdc_k_info_t *); 129 int (*net_bmap)(const struct bmap6 *); 130 int (*net_b_data)(const struct net_bdata6 *); 131 void (*zero_bitref)(rdc_k_info_t *); 132 void (*set_bitmask)(const nsc_off_t, const nsc_size_t, uint_t *); 133 void (*check_bit)(rdc_k_info_t *, nsc_off_t, nsc_size_t); 134 }; 135 136 extern struct rdc_bitmap_ops *rdc_bitmap_ops; 137 138 #define RDC_SET_BITMAP(krdc, pos, len, bitmaskp) \ 139 (*rdc_bitmap_ops->set_bitmap)(krdc, pos, len, bitmaskp) 140 #define RDC_CLR_BITMAP(krdc, pos, len, bitmask, flag) \ 141 (*rdc_bitmap_ops->clr_bitmap)(krdc, pos, len, bitmask, flag) 142 #define RDC_COUNT_BITMAP(krdc) \ 143 (*rdc_bitmap_ops->count_dirty)(krdc) 144 #define RDC_BIT_ISSET(krdc, bit) \ 145 (*rdc_bitmap_ops->bit_isset)(krdc, bit) 146 #define RDC_FILL_BITMAP(krdc, write) \ 147 (*rdc_bitmap_ops->fill_bitmap)(krdc, write) 148 #define RDC_ZERO_BITMAP(krdc) \ 149 (*rdc_bitmap_ops->zero_bitmap)(krdc) 150 #define RDC_SEND_BITMAP(argp) \ 151 (*rdc_bitmap_ops->net_bmap)(argp) 152 #define RDC_OR_BITMAP(argp) \ 153 (*rdc_bitmap_ops->net_b_data)(argp) 154 #define RDC_ZERO_BITREF(krdc) \ 155 (*rdc_bitmap_ops->zero_bitref)(krdc) 156 #define RDC_SET_BITMASK(off, len, maskp) \ 157 (*rdc_bitmap_ops->set_bitmask)(off, len, maskp) 158 #define RDC_CHECK_BIT(krdc, pos, len) \ 159 (*rdc_bitmap_ops->check_bit)(krdc, pos, len) 160 161 /* 162 * Functions 163 */ 164 165 extern void rdc_bitmap_init(void); 166 extern int rdc_move_bitmap(rdc_k_info_t *, char *); 167 extern int rdc_enable_bitmap(rdc_k_info_t *, int); 168 extern int rdc_resume_bitmap(rdc_k_info_t *); 169 extern int rdc_reset_bitmap(rdc_k_info_t *); 170 extern void rdc_free_bitmap(rdc_k_info_t *, int); 171 extern void rdc_close_bitmap(rdc_k_info_t *); 172 extern int rdc_write_bitmap(rdc_k_info_t *); 173 extern int rdc_write_bitmap_fill(rdc_k_info_t *); 174 extern void rdc_set_bitmap_many(rdc_k_info_t *, nsc_off_t, nsc_size_t); 175 extern void rdc_merge_bitmaps(rdc_k_info_t *, rdc_k_info_t *); 176 177 extern int rdc_read_state(rdc_k_info_t *, int *, int *); 178 extern int rdc_clear_state(rdc_k_info_t *); 179 extern void rdc_write_state(rdc_u_info_t *); 180 extern int rdc_ns_io(nsc_fd_t *, int, nsc_off_t, uchar_t *, nsc_size_t); 181 extern int rdc_read_refcount(rdc_k_info_t *); 182 extern int rdc_write_refcount(rdc_k_info_t *); 183 extern size_t rdc_refcntsize(rdc_k_info_t *); 184 185 #endif /* _KERNEL */ 186 187 #ifdef __cplusplus 188 } 189 #endif 190 191 #endif /* _RDC_BITMAP_H */ 192