1 /* 2 * Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved. 3 * 4 * This program is free software; you can redistribute it and/or modify it 5 * under the terms of version 2 of the GNU General Public License as 6 * published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope that it would be useful, but 9 * WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 11 * 12 * Further, this software is distributed without any warranty that it is 13 * free of the rightful claim of any third person regarding infringement 14 * or the like. Any license provided herein, whether implied or 15 * otherwise, applies only to this software file. Patent licenses, if 16 * any, provided herein do not apply to combinations of this program with 17 * other software, or any other product whatsoever. 18 * 19 * You should have received a copy of the GNU General Public License along 20 * with this program; if not, write the Free Software Foundation, Inc., 21 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 22 * 23 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, 24 * Mountain View, CA 94043, or: 25 * 26 * http://www.sgi.com 27 * 28 * For further information regarding this notice, see: 29 * 30 * http://oss.sgi.com/projects/GenInfo/NoticeExplan/ 31 */ 32 /* 33 * Define io syscalls supported by doio 34 */ 35 36 #define READ 1 37 #define WRITE 2 38 #define READA 3 39 #define WRITEA 4 40 #define SSREAD 5 41 #define SSWRITE 6 42 #define LISTIO 7 43 #define LREAD 10 /* listio - single stride, single entry */ 44 #define LREADA 11 45 #define LWRITE 12 46 #define LWRITEA 13 47 #define LSREAD 14 /* listio - multi-stride, single entry */ 48 #define LSREADA 15 49 #define LSWRITE 16 50 #define LSWRITEA 17 51 #define LEREAD 18 /* listio - single stride, multiple entry */ 52 #define LEREADA 19 53 #define LEWRITE 20 54 #define LEWRITEA 21 55 56 /* Irix System Calls */ 57 #define PREAD 100 58 #define PWRITE 101 59 #define READV 102 60 #define WRITEV 103 61 #define AREAD 104 62 #define AWRITE 105 63 #define LLREAD 110 64 #define LLAREAD 111 65 #define LLWRITE 112 66 #define LLAWRITE 113 67 #define MMAPR 120 68 #define MMAPW 121 69 #define RESVSP 122 /* fcntl(F_RESVSP) */ 70 #define UNRESVSP 123 /* fcntl(F_UNRESVSP) */ 71 #define DFFSYNC 124 /* fcntl(F_FSYNC) */ 72 #define FSYNC2 125 /* fsync(2) */ 73 #define FDATASYNC 126 /* fdatasync(2) */ 74 #define BIOSIZE 127 /* fcntl(F_SETBIOSIZE) */ 75 76 #ifdef CRAY 77 /* used: <<doio>> 1.? <<DOIO>> 1.5 <-DOIO-> 1.7*/ 78 #define DOIO_MAGIC '<[DOIO]>' 79 #else 80 #define DOIO_MAGIC 07116601 81 #endif 82 83 /* 84 * Define various user flags (r_uflag field) that io requests can have 85 * specified. 86 */ 87 88 #define F_WORD_ALIGNED 0001 /* force request to be word aligned */ 89 90 /* 91 * define various doio exit status's 92 */ 93 94 #define E_NORMAL 000 /* normal completion */ 95 #define E_USAGE 001 /* cmdline usage error */ 96 #define E_SETUP 002 /* any of a million setup conditions */ 97 #define E_COMPARE 004 /* data compare error from doio child */ 98 #define E_INTERNAL 010 /* various internal errors */ 99 #define E_LOCKD 020 /* lockd startup/timeout errors */ 100 #define E_SIGNAL 040 /* killed by signal */ 101 102 /* 103 * Define async io completion strategies supported by doio. 104 */ 105 106 #define A_POLL 1 /* poll iosw for completion */ 107 #define A_SIGNAL 2 /* get signal for completion */ 108 #define A_RECALL 3 /* use recall(2) to wait */ 109 #define A_RECALLA 4 /* use recalla(2) to wait */ 110 #define A_RECALLS 5 /* use recalls(2) to wait */ 111 #define A_SUSPEND 6 /* use aio_suspend(2) to wait */ 112 #define A_CALLBACK 7 /* use a callback signal op. */ 113 114 /* 115 * Define individual structures for each syscall type. These will all be 116 * unionized into a single io_req structure which io generators fill in and 117 * pass to doio. 118 * 119 * Note: It is VERY important that the r_file, r_oflags, r_offset, and 120 * r_nbytes fields occupy the same record positions in the 121 * read_req, reada_req, write_req, and writea_req structures and 122 * that they have the same type. It is also that r_pattern 123 * has the same type/offset in the write_req and writea_req 124 * structures. 125 * 126 * Since doio.c accesses all information through the r_data 127 * union in io_req, if the above assumptions hold, the above 128 * fields can be accessed without regard to structure type. 129 * This is an allowed assumption in C. 130 */ 131 132 #define MAX_FNAME_LENGTH 128 133 134 struct read_req { 135 char r_file[MAX_FNAME_LENGTH]; 136 int r_oflags; /* open flags */ 137 int r_offset; 138 int r_nbytes; 139 int r_uflags; /* user flags: mem alignment */ 140 int r_aio_strat; /* asynch read completion strategy */ 141 int r_nstrides; /* listio: multiple strides */ 142 int r_nent; /* listio: multiple list entries */ 143 }; 144 145 struct write_req { 146 char r_file[MAX_FNAME_LENGTH]; 147 int r_oflags; 148 int r_offset; 149 int r_nbytes; 150 char r_pattern; 151 int r_uflags; /* user flags: mem alignment */ 152 int r_aio_strat; /* asynch write completion strategy */ 153 int r_nstrides; /* listio: multiple strides */ 154 int r_nent; /* listio: multiple list entries */ 155 }; 156 157 struct ssread_req { 158 int r_nbytes; 159 }; 160 161 struct sswrite_req { 162 int r_nbytes; 163 char r_pattern; 164 }; 165 166 struct listio_req { 167 char r_file[MAX_FNAME_LENGTH]; 168 int r_cmd; /* LC_START or LC_WAIT */ 169 int r_offset; /* file offset */ 170 int r_opcode; /* LO_READ, or LO_WRITE */ 171 int r_nbytes; /* bytes per stride */ 172 int r_nstrides; /* how many strides to make */ 173 int r_nent; /* how many listreq entries to make */ 174 int r_filestride; /* always 0 for now */ 175 int r_memstride; /* always 0 for now */ 176 char r_pattern; /* for LO_WRITE operations */ 177 int r_oflags; /* open(2) flags */ 178 int r_aio_strat; /* async I/O completion strategy */ 179 int r_uflags; /* user flags: memory alignment */ 180 }; 181 182 #define rw_req listio_req /* listio is superset of everything */ 183 184 /* 185 * Main structure for sending a request to doio. Any tools which form IO 186 * for doio must present it using one of these structures. 187 */ 188 189 struct io_req { 190 int r_type; /* must be one of the #defines above */ 191 int r_magic; /* must be set to DOIO_MAGIC by requestor */ 192 union { 193 struct read_req read; 194 struct write_req write; 195 struct ssread_req ssread; 196 struct sswrite_req sswrite; 197 struct listio_req listio; 198 struct rw_req io; 199 } r_data; 200 }; 201
