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Comparing libeio/eio.c (file contents):
Revision 1.27 by root, Wed Oct 22 18:15:36 2008 UTC vs.
Revision 1.48 by root, Sat Jan 2 14:11:32 2010 UTC

1/* 1/*
2 * libeio implementation 2 * libeio implementation
3 * 3 *
4 * Copyright (c) 2007,2008 Marc Alexander Lehmann <libeio@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010 Marc Alexander Lehmann <libeio@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without modifica- 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met: 8 * tion, are permitted provided that the following conditions are met:
9 * 9 *
… …
36 * provisions above, a recipient may use your version of this file under 36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL. 37 * either the BSD or the GPL.
38 */ 38 */
39 39
40#include "eio.h" 40#include "eio.h"
41
42#ifdef EIO_STACKSIZE
43# define XTHREAD_STACKSIZE EIO_STACKSIZE
44#endif
41#include "xthread.h" 45#include "xthread.h"
42 46
43#include <errno.h> 47#include <errno.h>
44#include <stddef.h> 48#include <stddef.h>
45#include <stdlib.h> 49#include <stdlib.h>
… …
64#endif 68#endif
65 69
66#ifdef _WIN32 70#ifdef _WIN32
67 71
68 /*doh*/ 72 /*doh*/
69
70#else 73#else
71 74
72# include "config.h" 75# include "config.h"
73# include <sys/time.h> 76# include <sys/time.h>
74# include <sys/select.h> 77# include <sys/select.h>
78# include <sys/mman.h>
75# include <unistd.h> 79# include <unistd.h>
76# include <utime.h> 80# include <utime.h>
77# include <signal.h> 81# include <signal.h>
78# include <dirent.h> 82# include <dirent.h>
79 83
84/* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */
85# if __freebsd || defined __NetBSD__ || defined __OpenBSD__
86# define _DIRENT_HAVE_D_TYPE /* sigh */
87# define D_INO(de) (de)->d_fileno
88# define D_NAMLEN(de) (de)->d_namlen
89# elif __linux || defined d_ino || _XOPEN_SOURCE >= 600
90# define D_INO(de) (de)->d_ino
91# endif
92
93#ifdef _D_EXACT_NAMLEN
94# undef D_NAMLEN
95# define D_NAMLEN(de) _D_EXACT_NAMLEN (de)
96#endif
97
98# ifdef _DIRENT_HAVE_D_TYPE
99# define D_TYPE(de) (de)->d_type
100# endif
101
80# ifndef EIO_STRUCT_DIRENT 102# ifndef EIO_STRUCT_DIRENT
81# define EIO_STRUCT_DIRENT struct dirent 103# define EIO_STRUCT_DIRENT struct dirent
82# endif 104# endif
83 105
84#endif 106#endif
85 107
86#if HAVE_SENDFILE 108#if HAVE_SENDFILE
87# if __linux 109# if __linux
88# include <sys/sendfile.h> 110# include <sys/sendfile.h>
89# elif __freebsd 111# elif __freebsd || defined __APPLE__
90# include <sys/socket.h> 112# include <sys/socket.h>
91# include <sys/uio.h> 113# include <sys/uio.h>
92# elif __hpux 114# elif __hpux
93# include <sys/socket.h> 115# include <sys/socket.h>
94# elif __solaris /* not yet */ 116# elif __solaris
95# include <sys/sendfile.h> 117# include <sys/sendfile.h>
96# else 118# else
97# error sendfile support requested but not available 119# error sendfile support requested but not available
98# endif 120# endif
121#endif
122
123#ifndef D_TYPE
124# define D_TYPE(de) 0
125#endif
126#ifndef D_INO
127# define D_INO(de) 0
128#endif
129#ifndef D_NAMLEN
130# define D_NAMLEN(de) strlen ((de)->d_name)
99#endif 131#endif
100 132
101/* number of seconds after which an idle threads exit */ 133/* number of seconds after which an idle threads exit */
102#define IDLE_TIMEOUT 10 134#define IDLE_TIMEOUT 10
103 135
… …
155 if (wrk->dirp) \ 187 if (wrk->dirp) \
156 { \ 188 { \
157 closedir (wrk->dirp); \ 189 closedir (wrk->dirp); \
158 wrk->dirp = 0; \ 190 wrk->dirp = 0; \
159 } 191 }
192
160#define ETP_WORKER_COMMON \ 193#define ETP_WORKER_COMMON \
161 void *dbuf; \ 194 void *dbuf; \
162 DIR *dirp; 195 DIR *dirp;
163 196
164/*****************************************************************************/ 197/*****************************************************************************/
165 198
166#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1) 199#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)
167 200
168/* calculcate time difference in ~1/EIO_TICKS of a second */ 201/* calculate time difference in ~1/EIO_TICKS of a second */
169static int tvdiff (struct timeval *tv1, struct timeval *tv2) 202static int tvdiff (struct timeval *tv1, struct timeval *tv2)
170{ 203{
171 return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS 204 return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS
172 + ((tv2->tv_usec - tv1->tv_usec) >> 10); 205 + ((tv2->tv_usec - tv1->tv_usec) >> 10);
173} 206}
… …
565} 598}
566 599
567static void etp_set_max_poll_time (double nseconds) 600static void etp_set_max_poll_time (double nseconds)
568{ 601{
569 if (WORDACCESS_UNSAFE) X_LOCK (reslock); 602 if (WORDACCESS_UNSAFE) X_LOCK (reslock);
570 max_poll_time = nseconds; 603 max_poll_time = nseconds * EIO_TICKS;
571 if (WORDACCESS_UNSAFE) X_UNLOCK (reslock); 604 if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
572} 605}
573 606
574static void etp_set_max_poll_reqs (unsigned int maxreqs) 607static void etp_set_max_poll_reqs (unsigned int maxreqs)
575{ 608{
… …
767 800
768 X_LOCK (preadwritelock); 801 X_LOCK (preadwritelock);
769 ooffset = lseek (fd, 0, SEEK_CUR); 802 ooffset = lseek (fd, 0, SEEK_CUR);
770 lseek (fd, offset, SEEK_SET); 803 lseek (fd, offset, SEEK_SET);
771 res = write (fd, buf, count); 804 res = write (fd, buf, count);
772 lseek (fd, offset, SEEK_SET); 805 lseek (fd, ooffset, SEEK_SET);
773 X_UNLOCK (preadwritelock); 806 X_UNLOCK (preadwritelock);
774 807
775 return res; 808 return res;
776} 809}
777#endif 810#endif
… …
829 | (flags & EIO_SYNC_FILE_RANGE_WAIT_AFTER ? SYNC_FILE_RANGE_WAIT_AFTER : 0); 862 | (flags & EIO_SYNC_FILE_RANGE_WAIT_AFTER ? SYNC_FILE_RANGE_WAIT_AFTER : 0);
830 } 863 }
831 864
832 res = sync_file_range (fd, offset, nbytes, flags); 865 res = sync_file_range (fd, offset, nbytes, flags);
833 866
834 if (res != ENOSYS) 867 if (!res || errno != ENOSYS)
835 return res; 868 return res;
836#endif 869#endif
837 870
838 /* even though we could play tricks with the flags, it's better to always 871 /* even though we could play tricks with the flags, it's better to always
839 * call fdatasync, as thta matches the expectation of it's users best */ 872 * call fdatasync, as that matches the expectation of its users best */
840 return fdatasync (fd); 873 return fdatasync (fd);
841} 874}
842 875
843#if !HAVE_READAHEAD 876#if !HAVE_READAHEAD
844# undef readahead 877# undef readahead
… …
890 if (res < 0 && sbytes) 923 if (res < 0 && sbytes)
891 /* maybe only on EAGAIN: as usual, the manpage leaves you guessing */ 924 /* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
892 res = sbytes; 925 res = sbytes;
893 } 926 }
894 927
928# elif defined (__APPLE__)
929
930 {
931 off_t sbytes = count;
932 res = sendfile (ifd, ofd, offset, &sbytes, 0, 0);
933
934 if (res < 0 && errno == EAGAIN && sbytes)
935 res = sbytes;
936 }
937
895# elif __hpux 938# elif __hpux
896 res = sendfile (ofd, ifd, offset, count, 0, 0); 939 res = sendfile (ofd, ifd, offset, count, 0, 0);
897 940
898# elif __solaris 941# elif __solaris
899 { 942 {
… …
910 if (res < 0 && sbytes) 953 if (res < 0 && sbytes)
911 res = sbytes; 954 res = sbytes;
912 } 955 }
913 956
914# endif 957# endif
958
959#elif defined (_WIN32)
960
961 /* does not work, just for documentation of what would need to be done */
962 {
963 HANDLE h = TO_SOCKET (ifd);
964 SetFilePointer (h, offset, 0, FILE_BEGIN);
965 res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0);
966 }
967
915#else 968#else
916 res = -1; 969 res = -1;
917 errno = ENOSYS; 970 errno = ENOSYS;
918#endif 971#endif
919 972
920 if (res < 0 973 if (res < 0
921 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK 974 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
975 || errno == ENOTSUP || errno == EOPNOTSUPP /* BSDs */
922#if __solaris 976#if __solaris
923 || errno == EAFNOSUPPORT || errno == EPROTOTYPE 977 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
924#endif 978#endif
925 ) 979 )
926 ) 980 )
… …
957 } 1011 }
958 1012
959 return res; 1013 return res;
960} 1014}
961 1015
1016static signed char
1017eio_dent_cmp (const eio_dirent *a, const eio_dirent *b)
1018{
1019 return a->score - b->score ? a->score - b->score /* works because our signed char is always 0..100 */
1020 : a->inode < b->inode ? -1 : a->inode > b->inode ? 1 : 0;
1021}
1022
1023#define EIO_DENT_CMP(i,op,j) eio_dent_cmp (&i, &j) op 0
1024
1025#define EIO_SORT_CUTOFF 30 /* quite high, but performs well on many filesystems */
1026#define EIO_SORT_FAST 60 /* when to only use insertion sort */
1027
1028static void
1029eio_dent_radix_sort (eio_dirent *dents, int size, signed char score_bits, ino_t inode_bits)
1030{
1031 unsigned char bits [9 + sizeof (ino_t) * 8];
1032 unsigned char *bit = bits;
1033
1034 assert (CHAR_BIT == 8);
1035 assert (sizeof (eio_dirent) * 8 < 256);
1036 assert (offsetof (eio_dirent, inode)); /* we use 0 as sentinel */
1037 assert (offsetof (eio_dirent, score)); /* we use 0 as sentinel */
1038
1039 if (size <= EIO_SORT_FAST)
1040 return;
1041
1042 /* first prepare an array of bits to test in our radix sort */
1043 /* try to take endianness into account, as well as differences in ino_t sizes */
1044 /* inode_bits must contain all inodes ORed together */
1045 /* which is used to skip bits that are 0 everywhere, which is very common */
1046 {
1047 ino_t endianness;
1048 int i, j;
1049
1050 /* we store the byte offset of byte n into byte n of "endianness" */
1051 for (i = 0; i < sizeof (ino_t); ++i)
1052 ((unsigned char *)&endianness)[i] = i;
1053
1054 *bit++ = 0;
1055
1056 for (i = 0; i < sizeof (ino_t); ++i)
1057 {
1058 /* shifting off the byte offsets out of "endianness" */
1059 int offs = (offsetof (eio_dirent, inode) + (endianness & 0xff)) * 8;
1060 endianness >>= 8;
1061
1062 for (j = 0; j < 8; ++j)
1063 if (inode_bits & (((ino_t)1) << (i * 8 + j)))
1064 *bit++ = offs + j;
1065 }
1066
1067 for (j = 0; j < 8; ++j)
1068 if (score_bits & (1 << j))
1069 *bit++ = offsetof (eio_dirent, score) * 8 + j;
1070 }
1071
1072 /* now actually do the sorting (a variant of MSD radix sort) */
1073 {
1074 eio_dirent *base_stk [9 + sizeof (ino_t) * 8], *base;
1075 eio_dirent *end_stk [9 + sizeof (ino_t) * 8], *end;
1076 unsigned char *bit_stk [9 + sizeof (ino_t) * 8];
1077 int stk_idx = 0;
1078
1079 base_stk [stk_idx] = dents;
1080 end_stk [stk_idx] = dents + size;
1081 bit_stk [stk_idx] = bit - 1;
1082
1083 do
1084 {
1085 base = base_stk [stk_idx];
1086 end = end_stk [stk_idx];
1087 bit = bit_stk [stk_idx];
1088
1089 for (;;)
1090 {
1091 unsigned char O = *bit >> 3;
1092 unsigned char M = 1 << (*bit & 7);
1093
1094 eio_dirent *a = base;
1095 eio_dirent *b = end;
1096
1097 if (b - a < EIO_SORT_CUTOFF)
1098 break;
1099
1100 /* now bit-partition the array on the bit */
1101 /* this ugly asymmetric loop seems to perform much better than typical */
1102 /* partition algos found in the literature */
1103 do
1104 if (!(((unsigned char *)a)[O] & M))
1105 ++a;
1106 else if (!(((unsigned char *)--b)[O] & M))
1107 {
1108 eio_dirent tmp = *a; *a = *b; *b = tmp;
1109 ++a;
1110 }
1111 while (b > a);
1112
1113 /* next bit, or stop, if no bits left in this path */
1114 if (!*--bit)
1115 break;
1116
1117 base_stk [stk_idx] = a;
1118 end_stk [stk_idx] = end;
1119 bit_stk [stk_idx] = bit;
1120 ++stk_idx;
1121
1122 end = a;
1123 }
1124 }
1125 while (stk_idx--);
1126 }
1127}
1128
1129static void
1130eio_dent_insertion_sort (eio_dirent *dents, int size)
1131{
1132 /* first move the smallest element to the front, to act as a sentinel */
1133 {
1134 int i;
1135 eio_dirent *min = dents;
1136
1137 /* the radix pre-pass ensures that the minimum element is in the first EIO_SORT_CUTOFF + 1 elements */
1138 for (i = size > EIO_SORT_FAST ? EIO_SORT_CUTOFF + 1 : size; --i; )
1139 if (EIO_DENT_CMP (dents [i], <, *min))
1140 min = &dents [i];
1141
1142 /* swap elements 0 and j (minimum) */
1143 {
1144 eio_dirent tmp = *dents; *dents = *min; *min = tmp;
1145 }
1146 }
1147
1148 /* then do standard insertion sort, assuming that all elements are >= dents [0] */
1149 {
1150 eio_dirent *i, *j;
1151
1152 for (i = dents + 1; i < dents + size; ++i)
1153 {
1154 eio_dirent value = *i;
1155
1156 for (j = i - 1; EIO_DENT_CMP (*j, >, value); --j)
1157 j [1] = j [0];
1158
1159 j [1] = value;
1160 }
1161 }
1162}
1163
1164static void
1165eio_dent_sort (eio_dirent *dents, int size, signed char score_bits, ino_t inode_bits)
1166{
1167 if (size <= 1)
1168 return; /* our insertion sort relies on size > 0 */
1169
1170 /* first we use a radix sort, but only for dirs >= EIO_SORT_FAST */
1171 /* and stop sorting when the partitions are <= EIO_SORT_CUTOFF */
1172 eio_dent_radix_sort (dents, size, score_bits, inode_bits);
1173
1174 /* use an insertion sort at the end, or for small arrays, */
1175 /* as insertion sort is more efficient for small partitions */
1176 eio_dent_insertion_sort (dents, size);
1177}
1178
962/* read a full directory */ 1179/* read a full directory */
963static void 1180static void
964eio__scandir (eio_req *req, etp_worker *self) 1181eio__scandir (eio_req *req, etp_worker *self)
965{ 1182{
966 DIR *dirp; 1183 DIR *dirp;
967 EIO_STRUCT_DIRENT *entp; 1184 EIO_STRUCT_DIRENT *entp;
968 char *name, *names; 1185 char *name, *names;
969 int memlen = 4096; 1186 int namesalloc = 4096;
970 int memofs = 0; 1187 int namesoffs = 0;
1188 int flags = req->int1;
1189 eio_dirent *dents = 0;
1190 int dentalloc = 128;
971 int res = 0; 1191 int dentoffs = 0;
1192 ino_t inode_bits = 0;
1193
1194 req->result = -1;
1195
1196 if (!(flags & EIO_READDIR_DENTS))
1197 flags &= ~(EIO_READDIR_DIRS_FIRST | EIO_READDIR_STAT_ORDER);
972 1198
973 X_LOCK (wrklock); 1199 X_LOCK (wrklock);
974 /* the corresponding closedir is in ETP_WORKER_CLEAR */ 1200 /* the corresponding closedir is in ETP_WORKER_CLEAR */
975 self->dirp = dirp = opendir (req->ptr1); 1201 self->dirp = dirp = opendir (req->ptr1);
976 req->flags |= EIO_FLAG_PTR2_FREE; 1202 req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE;
1203 req->ptr1 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0;
977 req->ptr2 = names = malloc (memlen); 1204 req->ptr2 = names = malloc (namesalloc);
978 X_UNLOCK (wrklock); 1205 X_UNLOCK (wrklock);
979 1206
980 if (dirp && names) 1207 if (dirp && names && (!flags || dents))
981 for (;;) 1208 for (;;)
982 { 1209 {
983 errno = 0; 1210 errno = 0;
984 entp = readdir (dirp); 1211 entp = readdir (dirp);
985 1212
986 if (!entp) 1213 if (!entp)
1214 {
1215 if (errno)
1216 break;
1217
1218 /* sort etc. */
1219 req->int1 = flags;
1220 req->result = dentoffs;
1221
1222 if (flags & EIO_READDIR_STAT_ORDER)
1223 eio_dent_sort (dents, dentoffs, 0, inode_bits); /* sort by inode exclusively */
1224 else if (flags & EIO_READDIR_DIRS_FIRST)
1225 if (flags & EIO_READDIR_FOUND_UNKNOWN)
1226 eio_dent_sort (dents, dentoffs, 7, inode_bits); /* sort by score and inode */
1227 else
1228 {
1229 /* in this case, all is known, and we just put dirs first and sort them */
1230 eio_dirent *oth = dents + dentoffs;
1231 eio_dirent *dir = dents;
1232
1233 /* now partition dirs to the front, and non-dirs to the back */
1234 /* by walking from both sides and swapping if necessary */
1235 /* also clear score, so it doesn't influence sorting */
1236 while (oth > dir)
1237 {
1238 if (dir->type == EIO_DT_DIR)
1239 ++dir;
1240 else if ((--oth)->type == EIO_DT_DIR)
1241 {
1242 eio_dirent tmp = *dir; *dir = *oth; *oth = tmp;
1243
1244 ++dir;
1245 }
1246 }
1247
1248 /* now sort the dirs only */
1249 eio_dent_sort (dents, dir - dents, 0, inode_bits);
1250 }
1251
987 break; 1252 break;
1253 }
988 1254
1255 /* now add the entry to our list(s) */
989 name = entp->d_name; 1256 name = entp->d_name;
990 1257
1258 /* skip . and .. entries */
991 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2]))) 1259 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
992 { 1260 {
993 int len = strlen (name) + 1; 1261 int len = D_NAMLEN (entp) + 1;
994 1262
995 res++; 1263 while (expect_false (namesoffs + len > namesalloc))
996
997 while (memofs + len > memlen)
998 { 1264 {
999 memlen *= 2; 1265 namesalloc *= 2;
1000 X_LOCK (wrklock); 1266 X_LOCK (wrklock);
1001 req->ptr2 = names = realloc (names, memlen); 1267 req->ptr2 = names = realloc (names, namesalloc);
1002 X_UNLOCK (wrklock); 1268 X_UNLOCK (wrklock);
1003 1269
1004 if (!names) 1270 if (!names)
1005 break; 1271 break;
1006 } 1272 }
1007 1273
1008 memcpy (names + memofs, name, len); 1274 memcpy (names + namesoffs, name, len);
1275
1276 if (dents)
1277 {
1278 struct eio_dirent *ent;
1279
1280 if (expect_false (dentoffs == dentalloc))
1281 {
1282 dentalloc *= 2;
1283 X_LOCK (wrklock);
1284 req->ptr1 = dents = realloc (dents, dentalloc * sizeof (eio_dirent));
1285 X_UNLOCK (wrklock);
1286
1287 if (!dents)
1288 break;
1289 }
1290
1291 ent = dents + dentoffs;
1292
1293 ent->nameofs = namesoffs; /* rather dirtily we store the offset in the pointer */
1294 ent->namelen = len - 1;
1295 ent->inode = D_INO (entp);
1296
1297 inode_bits |= ent->inode;
1298
1299 switch (D_TYPE (entp))
1300 {
1301 default:
1302 ent->type = EIO_DT_UNKNOWN;
1303 flags |= EIO_READDIR_FOUND_UNKNOWN;
1304 break;
1305
1306 #ifdef DT_FIFO
1307 case DT_FIFO: ent->type = EIO_DT_FIFO; break;
1308 #endif
1309 #ifdef DT_CHR
1310 case DT_CHR: ent->type = EIO_DT_CHR; break;
1311 #endif
1312 #ifdef DT_MPC
1313 case DT_MPC: ent->type = EIO_DT_MPC; break;
1314 #endif
1315 #ifdef DT_DIR
1316 case DT_DIR: ent->type = EIO_DT_DIR; break;
1317 #endif
1318 #ifdef DT_NAM
1319 case DT_NAM: ent->type = EIO_DT_NAM; break;
1320 #endif
1321 #ifdef DT_BLK
1322 case DT_BLK: ent->type = EIO_DT_BLK; break;
1323 #endif
1324 #ifdef DT_MPB
1325 case DT_MPB: ent->type = EIO_DT_MPB; break;
1326 #endif
1327 #ifdef DT_REG
1328 case DT_REG: ent->type = EIO_DT_REG; break;
1329 #endif
1330 #ifdef DT_NWK
1331 case DT_NWK: ent->type = EIO_DT_NWK; break;
1332 #endif
1333 #ifdef DT_CMP
1334 case DT_CMP: ent->type = EIO_DT_CMP; break;
1335 #endif
1336 #ifdef DT_LNK
1337 case DT_LNK: ent->type = EIO_DT_LNK; break;
1338 #endif
1339 #ifdef DT_SOCK
1340 case DT_SOCK: ent->type = EIO_DT_SOCK; break;
1341 #endif
1342 #ifdef DT_DOOR
1343 case DT_DOOR: ent->type = EIO_DT_DOOR; break;
1344 #endif
1345 #ifdef DT_WHT
1346 case DT_WHT: ent->type = EIO_DT_WHT; break;
1347 #endif
1348 }
1349
1350 ent->score = 7;
1351
1352 if (flags & EIO_READDIR_DIRS_FIRST)
1353 {
1354 if (ent->type == EIO_DT_UNKNOWN)
1355 {
1356 if (*name == '.') /* leading dots are likely directories, and, in any case, rare */
1357 ent->score = 1;
1358 else if (!strchr (name, '.')) /* absense of dots indicate likely dirs */
1359 ent->score = len <= 2 ? 4 - len : len <= 4 ? 4 : len <= 7 ? 5 : 6; /* shorter == more likely dir, but avoid too many classes */
1360 }
1361 else if (ent->type == EIO_DT_DIR)
1362 ent->score = 0;
1363 }
1364 }
1365
1009 memofs += len; 1366 namesoffs += len;
1367 ++dentoffs;
1368 }
1369
1370 if (EIO_CANCELLED (req))
1371 {
1372 errno = ECANCELED;
1373 break;
1010 } 1374 }
1011 } 1375 }
1012
1013 if (errno)
1014 res = -1;
1015
1016 req->result = res;
1017} 1376}
1018 1377
1019#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO) 1378#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO)
1020# undef msync 1379# define eio__msync(a,b,c) ((errno = ENOSYS), -1)
1021# define msync(a,b,c) ENOSYS 1380#else
1381
1382int
1383eio__msync (void *mem, size_t len, int flags)
1384{
1385 if (EIO_MS_ASYNC != MS_SYNC
1386 || EIO_MS_INVALIDATE != MS_INVALIDATE
1387 || EIO_MS_SYNC != MS_SYNC)
1388 {
1389 flags = 0
1390 | (flags & EIO_MS_ASYNC ? MS_ASYNC : 0)
1391 | (flags & EIO_MS_INVALIDATE ? MS_INVALIDATE : 0)
1392 | (flags & EIO_MS_SYNC ? MS_SYNC : 0);
1393 }
1394
1395 return msync (mem, len, flags);
1396}
1397
1022#endif 1398#endif
1023 1399
1024int 1400int
1025eio__mtouch (void *mem, size_t len, int flags) 1401eio__mtouch (void *mem, size_t len, int flags)
1026{ 1402{
… …
1033 1409
1034 if (!page) 1410 if (!page)
1035 page = sysconf (_SC_PAGESIZE); 1411 page = sysconf (_SC_PAGESIZE);
1036#endif 1412#endif
1037 1413
1414 /* round down to start of page, although this is probably useless */
1038 addr &= ~(page - 1); /* assume page size is always a power of two */ 1415 addr &= ~(page - 1); /* assume page size is always a power of two */
1039 1416
1040 if (addr < end) 1417 if (addr < end)
1041 if (flags) /* modify */ 1418 if (flags & EIO_MT_MODIFY) /* modify */
1042 do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len); 1419 do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len);
1043 else 1420 else
1044 do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len); 1421 do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len);
1045 1422
1046 return 0; 1423 return 0;
… …
1218 req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break; 1595 req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;
1219 1596
1220 case EIO_SYNC: req->result = 0; sync (); break; 1597 case EIO_SYNC: req->result = 0; sync (); break;
1221 case EIO_FSYNC: req->result = fsync (req->int1); break; 1598 case EIO_FSYNC: req->result = fsync (req->int1); break;
1222 case EIO_FDATASYNC: req->result = fdatasync (req->int1); break; 1599 case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
1223 case EIO_MSYNC: req->result = msync (req->ptr2, req->size, req->int1); break; 1600 case EIO_MSYNC: req->result = eio__msync (req->ptr2, req->size, req->int1); break;
1224 case EIO_MTOUCH: req->result = eio__mtouch (req->ptr2, req->size, req->int1); break; 1601 case EIO_MTOUCH: req->result = eio__mtouch (req->ptr2, req->size, req->int1); break;
1225 case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break; 1602 case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;
1226 1603
1227 case EIO_READDIR: eio__scandir (req, self); break; 1604 case EIO_READDIR: eio__scandir (req, self); break;
1228 1605
… …
1441eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data) 1818eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data)
1442{ 1819{
1443 return eio__1path (EIO_RMDIR, path, pri, cb, data); 1820 return eio__1path (EIO_RMDIR, path, pri, cb, data);
1444} 1821}
1445 1822
1446eio_req *eio_readdir (const char *path, int pri, eio_cb cb, void *data) 1823eio_req *eio_readdir (const char *path, int flags, int pri, eio_cb cb, void *data)
1447{ 1824{
1448 return eio__1path (EIO_READDIR, path, pri, cb, data); 1825 REQ (EIO_READDIR); PATH; req->int1 = flags; SEND;
1449} 1826}
1450 1827
1451eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data) 1828eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data)
1452{ 1829{
1453 REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->int3 = (long)dev; SEND; 1830 REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->int3 = (long)dev; SEND;
… …
1542/* misc garbage */ 1919/* misc garbage */
1543 1920
1544ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count) 1921ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)
1545{ 1922{
1546 etp_worker wrk; 1923 etp_worker wrk;
1924 ssize_t ret;
1547 1925
1548 wrk.dbuf = 0; 1926 wrk.dbuf = 0;
1549 1927
1550 eio__sendfile (ofd, ifd, offset, count, &wrk); 1928 ret = eio__sendfile (ofd, ifd, offset, count, &wrk);
1551 1929
1552 if (wrk.dbuf) 1930 if (wrk.dbuf)
1553 free (wrk.dbuf); 1931 free (wrk.dbuf);
1554}
1555 1932
1933 return ret;
1934}
1935

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