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Comparing cvsroot/libeio/eio.c (file contents):
Revision 1.38 by root, Fri Jun 12 20:01:42 2009 UTC vs.
Revision 1.52 by root, Fri Jan 8 09:29:56 2010 UTC

1/* 1/*
2 * libeio implementation 2 * libeio implementation
3 * 3 *
4 * Copyright (c) 2007,2008,2009 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 *
… …
49#include <stdlib.h> 49#include <stdlib.h>
50#include <string.h> 50#include <string.h>
51#include <errno.h> 51#include <errno.h>
52#include <sys/types.h> 52#include <sys/types.h>
53#include <sys/stat.h> 53#include <sys/stat.h>
54#include <sys/statvfs.h>
54#include <limits.h> 55#include <limits.h>
55#include <fcntl.h> 56#include <fcntl.h>
56#include <assert.h> 57#include <assert.h>
57 58
58#ifndef EIO_FINISH 59#ifndef EIO_FINISH
… …
80# include <utime.h> 81# include <utime.h>
81# include <signal.h> 82# include <signal.h>
82# include <dirent.h> 83# include <dirent.h>
83 84
84/* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */ 85/* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */
85# if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) 86# if __FreeBSD__ || defined __NetBSD__ || defined __OpenBSD__
86# define _DIRENT_HAVE_D_TYPE /* sigh */ 87# define _DIRENT_HAVE_D_TYPE /* sigh */
87# define D_INO(de) (de)->d_fileno 88# define D_INO(de) (de)->d_fileno
88# define D_NAMLEN(de) (de)->d_namlen 89# define D_NAMLEN(de) (de)->d_namlen
89# elif defined(__linux) || defined(d_ino) || _XOPEN_SOURCE >= 600 90# elif __linux || defined d_ino || _XOPEN_SOURCE >= 600
90# define D_INO(de) (de)->d_ino 91# define D_INO(de) (de)->d_ino
91# endif 92# endif
92 93
93#ifdef _D_EXACT_NAMLEN 94#ifdef _D_EXACT_NAMLEN
94# undef D_NAMLEN 95# undef D_NAMLEN
… …
106#endif 107#endif
107 108
108#if HAVE_SENDFILE 109#if HAVE_SENDFILE
109# if __linux 110# if __linux
110# include <sys/sendfile.h> 111# include <sys/sendfile.h>
111# elif __freebsd 112# elif __FreeBSD__ || defined __APPLE__
112# include <sys/socket.h> 113# include <sys/socket.h>
113# include <sys/uio.h> 114# include <sys/uio.h>
114# elif __hpux 115# elif __hpux
115# include <sys/socket.h> 116# include <sys/socket.h>
116# elif __solaris /* not yet */ 117# elif __solaris
117# include <sys/sendfile.h> 118# include <sys/sendfile.h>
118# else 119# else
119# error sendfile support requested but not available 120# error sendfile support requested but not available
120# endif 121# endif
121#endif 122#endif
… …
196 197
197/*****************************************************************************/ 198/*****************************************************************************/
198 199
199#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1) 200#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)
200 201
201/* calculcate time difference in ~1/EIO_TICKS of a second */ 202/* calculate time difference in ~1/EIO_TICKS of a second */
202static int tvdiff (struct timeval *tv1, struct timeval *tv2) 203static int tvdiff (struct timeval *tv1, struct timeval *tv2)
203{ 204{
204 return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS 205 return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS
205 + ((tv2->tv_usec - tv1->tv_usec) >> 10); 206 + ((tv2->tv_usec - tv1->tv_usec) >> 10);
206} 207}
… …
598} 599}
599 600
600static void etp_set_max_poll_time (double nseconds) 601static void etp_set_max_poll_time (double nseconds)
601{ 602{
602 if (WORDACCESS_UNSAFE) X_LOCK (reslock); 603 if (WORDACCESS_UNSAFE) X_LOCK (reslock);
603 max_poll_time = nseconds; 604 max_poll_time = nseconds * EIO_TICKS;
604 if (WORDACCESS_UNSAFE) X_UNLOCK (reslock); 605 if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
605} 606}
606 607
607static void etp_set_max_poll_reqs (unsigned int maxreqs) 608static void etp_set_max_poll_reqs (unsigned int maxreqs)
608{ 609{
… …
867 if (!res || errno != ENOSYS) 868 if (!res || errno != ENOSYS)
868 return res; 869 return res;
869#endif 870#endif
870 871
871 /* even though we could play tricks with the flags, it's better to always 872 /* even though we could play tricks with the flags, it's better to always
872 * call fdatasync, as thta matches the expectation of it's users best */ 873 * call fdatasync, as that matches the expectation of its users best */
873 return fdatasync (fd); 874 return fdatasync (fd);
874} 875}
875 876
876#if !HAVE_READAHEAD 877#if !HAVE_READAHEAD
877# undef readahead 878# undef readahead
… …
909 910
910#if HAVE_SENDFILE 911#if HAVE_SENDFILE
911# if __linux 912# if __linux
912 res = sendfile (ofd, ifd, &offset, count); 913 res = sendfile (ofd, ifd, &offset, count);
913 914
914# elif __freebsd 915# elif __FreeBSD__
915 /* 916 /*
916 * Of course, the freebsd sendfile is a dire hack with no thoughts 917 * Of course, the freebsd sendfile is a dire hack with no thoughts
917 * wasted on making it similar to other I/O functions. 918 * wasted on making it similar to other I/O functions.
918 */ 919 */
919 { 920 {
920 off_t sbytes; 921 off_t sbytes;
921 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0); 922 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
922 923
923 if (res < 0 && sbytes) 924 /* freebsd' sendfile will return 0 on success */
924 /* maybe only on EAGAIN: as usual, the manpage leaves you guessing */ 925 /* freebsd 8 documents it as only setting *sbytes on EINTR and EAGAIN, but */
926 /* not on e.g. EIO or EPIPE - sounds broken */
927 if ((res < 0 && (errno == EAGAIN || errno == EINTR) && sbytes) || res == 0)
928 res = sbytes;
929 }
930
931# elif defined (__APPLE__)
932
933 {
934 off_t sbytes = count;
935 res = sendfile (ifd, ofd, offset, &sbytes, 0, 0);
936
937 /* according to the manpage, sbytes is always valid */
938 if (sbytes)
925 res = sbytes; 939 res = sbytes;
926 } 940 }
927 941
928# elif __hpux 942# elif __hpux
929 res = sendfile (ofd, ifd, offset, count, 0, 0); 943 res = sendfile (ofd, ifd, offset, count, 0, 0);
… …
943 if (res < 0 && sbytes) 957 if (res < 0 && sbytes)
944 res = sbytes; 958 res = sbytes;
945 } 959 }
946 960
947# endif 961# endif
962
963#elif defined (_WIN32)
964
965 /* does not work, just for documentation of what would need to be done */
966 {
967 HANDLE h = TO_SOCKET (ifd);
968 SetFilePointer (h, offset, 0, FILE_BEGIN);
969 res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0);
970 }
971
948#else 972#else
949 res = -1; 973 res = -1;
950 errno = ENOSYS; 974 errno = ENOSYS;
951#endif 975#endif
952 976
953 if (res < 0 977 if (res < 0
954 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK 978 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
979 /* BSDs */
980#ifdef ENOTSUP /* sigh, if the steenking pile called openbsd would only try to at least compile posix code... */
981 || errno == ENOTSUP
982#endif
983 || errno == EOPNOTSUPP /* BSDs */
955#if __solaris 984#if __solaris
956 || errno == EAFNOSUPPORT || errno == EPROTOTYPE 985 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
957#endif 986#endif
958 ) 987 )
959 ) 988 )
… …
993} 1022}
994 1023
995static signed char 1024static signed char
996eio_dent_cmp (const eio_dirent *a, const eio_dirent *b) 1025eio_dent_cmp (const eio_dirent *a, const eio_dirent *b)
997{ 1026{
998 return b->score - a->score ? b->score - a->score /* works because our signed char is always 0..100 */ 1027 return a->score - b->score ? a->score - b->score /* works because our signed char is always 0..100 */
999 : a->inode < b->inode ? -1 : a->inode > b->inode ? 1 : 0; 1028 : a->inode < b->inode ? -1 : a->inode > b->inode ? 1 : 0;
1000} 1029}
1001 1030
1031#define EIO_DENT_CMP(i,op,j) eio_dent_cmp (&i, &j) op 0
1032
1002#define EIO_QSORT_CUTOFF 20 /* quite high, but performs well on many filesystems */ 1033#define EIO_SORT_CUTOFF 30 /* quite high, but performs well on many filesystems */
1034#define EIO_SORT_FAST 60 /* when to only use insertion sort */
1003 1035
1004static void 1036static void
1005eio_dent_sort (eio_dirent *dents, int size) 1037eio_dent_radix_sort (eio_dirent *dents, int size, signed char score_bits, ino_t inode_bits)
1006{ 1038{
1039 unsigned char bits [9 + sizeof (ino_t) * 8];
1040 unsigned char *bit = bits;
1041
1042 assert (CHAR_BIT == 8);
1043 assert (sizeof (eio_dirent) * 8 < 256);
1044 assert (offsetof (eio_dirent, inode)); /* we use 0 as sentinel */
1045 assert (offsetof (eio_dirent, score)); /* we use 0 as sentinel */
1046
1047 if (size <= EIO_SORT_FAST)
1048 return;
1049
1050 /* first prepare an array of bits to test in our radix sort */
1051 /* try to take endianness into account, as well as differences in ino_t sizes */
1052 /* inode_bits must contain all inodes ORed together */
1053 /* which is used to skip bits that are 0 everywhere, which is very common */
1054 {
1055 ino_t endianness;
1007 int i, j; 1056 int i, j;
1008 1057
1009 if (size > EIO_QSORT_CUTOFF * 3) /* skip quicksort for small directories */ 1058 /* we store the byte offset of byte n into byte n of "endianness" */
1059 for (i = 0; i < sizeof (ino_t); ++i)
1060 ((unsigned char *)&endianness)[i] = i;
1061
1062 *bit++ = 0;
1063
1064 for (i = 0; i < sizeof (ino_t); ++i)
1065 {
1066 /* shifting off the byte offsets out of "endianness" */
1067 int offs = (offsetof (eio_dirent, inode) + (endianness & 0xff)) * 8;
1068 endianness >>= 8;
1069
1070 for (j = 0; j < 8; ++j)
1071 if (inode_bits & (((ino_t)1) << (i * 8 + j)))
1072 *bit++ = offs + j;
1073 }
1074
1075 for (j = 0; j < 8; ++j)
1076 if (score_bits & (1 << j))
1077 *bit++ = offsetof (eio_dirent, score) * 8 + j;
1078 }
1079
1080 /* now actually do the sorting (a variant of MSD radix sort) */
1081 {
1082 eio_dirent *base_stk [9 + sizeof (ino_t) * 8], *base;
1083 eio_dirent *end_stk [9 + sizeof (ino_t) * 8], *end;
1084 unsigned char *bit_stk [9 + sizeof (ino_t) * 8];
1085 int stk_idx = 0;
1086
1087 base_stk [stk_idx] = dents;
1088 end_stk [stk_idx] = dents + size;
1089 bit_stk [stk_idx] = bit - 1;
1090
1091 do
1092 {
1093 base = base_stk [stk_idx];
1094 end = end_stk [stk_idx];
1095 bit = bit_stk [stk_idx];
1096
1097 for (;;)
1098 {
1099 unsigned char O = *bit >> 3;
1100 unsigned char M = 1 << (*bit & 7);
1101
1102 eio_dirent *a = base;
1103 eio_dirent *b = end;
1104
1105 if (b - a < EIO_SORT_CUTOFF)
1106 break;
1107
1108 /* now bit-partition the array on the bit */
1109 /* this ugly asymmetric loop seems to perform much better than typical */
1110 /* partition algos found in the literature */
1111 do
1112 if (!(((unsigned char *)a)[O] & M))
1113 ++a;
1114 else if (!(((unsigned char *)--b)[O] & M))
1115 {
1116 eio_dirent tmp = *a; *a = *b; *b = tmp;
1117 ++a;
1118 }
1119 while (b > a);
1120
1121 /* next bit, or stop, if no bits left in this path */
1122 if (!*--bit)
1123 break;
1124
1125 base_stk [stk_idx] = a;
1126 end_stk [stk_idx] = end;
1127 bit_stk [stk_idx] = bit;
1128 ++stk_idx;
1129
1130 end = a;
1131 }
1132 }
1133 while (stk_idx--);
1134 }
1135}
1136
1137static void
1138eio_dent_insertion_sort (eio_dirent *dents, int size)
1139{
1140 /* first move the smallest element to the front, to act as a sentinel */
1141 {
1142 int i;
1143 eio_dirent *min = dents;
1144
1145 /* the radix pre-pass ensures that the minimum element is in the first EIO_SORT_CUTOFF + 1 elements */
1146 for (i = size > EIO_SORT_FAST ? EIO_SORT_CUTOFF + 1 : size; --i; )
1147 if (EIO_DENT_CMP (dents [i], <, *min))
1148 min = &dents [i];
1149
1150 /* swap elements 0 and j (minimum) */
1010 { 1151 {
1011 /* first, use quicksort */ 1152 eio_dirent tmp = *dents; *dents = *min; *min = tmp;
1012 /* should be good for 2**31 entries */ 1153 }
1013 struct rng { int l, r; } rng [32]; 1154 }
1014 1155
1015 i = 0; 1156 /* then do standard insertion sort, assuming that all elements are >= dents [0] */
1016 rng[0].l = 0; 1157 {
1017 rng[0].r = size; 1158 eio_dirent *i, *j;
1018 1159
1019 while (expect_true (i >= 0)) 1160 for (i = dents + 1; i < dents + size; ++i)
1020 { 1161 {
1021 int L = rng [i].l; 1162 eio_dirent value = *i;
1022 int R = rng [i].r - 1;
1023 1163
1024 if (expect_false (L + EIO_QSORT_CUTOFF < R)) 1164 for (j = i - 1; EIO_DENT_CMP (*j, >, value); --j)
1025 { 1165 j [1] = j [0];
1026 eio_dirent piv = dents [L];
1027 1166
1028 while (L < R) 1167 j [1] = value;
1029 {
1030 while (eio_dent_cmp (&dents [R], &piv) >= 0 && L < R)
1031 --R;
1032
1033 if (L < R)
1034 dents [L++] = dents [R];
1035
1036 while (eio_dent_cmp (&dents [L], &piv) <= 0 && L < R)
1037 ++L;
1038
1039 if (L < R)
1040 dents [R--] = dents [L];
1041 }
1042
1043 dents [L] = piv;
1044
1045 ++i;
1046 rng [i].l = L + 1;
1047 rng [i].r = rng [i - 1].r;
1048 rng [i - 1].r = L;
1049
1050 if (rng [i].r - rng [i].l > rng [i - 1].r - rng [i - 1].l)
1051 {
1052 struct rng t;
1053
1054 t = rng [i]; rng [i] = rng [i - 1]; rng [i - 1] = t;
1055 }
1056 }
1057 else
1058 --i;
1059 } 1168 }
1060 } 1169 }
1170}
1061 1171
1062 /* use a simple insertion sort at the end */ 1172static void
1063 for (i = 1; i < size; ++i) 1173eio_dent_sort (eio_dirent *dents, int size, signed char score_bits, ino_t inode_bits)
1064 { 1174{
1065 eio_dirent value = dents [i]; 1175 if (size <= 1)
1176 return; /* our insertion sort relies on size > 0 */
1066 1177
1067 for (j = i - 1; j >= 0 && eio_dent_cmp (&dents [j], &value) > 0; --j) 1178 /* first we use a radix sort, but only for dirs >= EIO_SORT_FAST */
1068 dents [j + 1] = dents [j]; 1179 /* and stop sorting when the partitions are <= EIO_SORT_CUTOFF */
1180 eio_dent_radix_sort (dents, size, score_bits, inode_bits);
1069 1181
1070 dents [j + 1] = value; 1182 /* use an insertion sort at the end, or for small arrays, */
1071 } 1183 /* as insertion sort is more efficient for small partitions */
1184 eio_dent_insertion_sort (dents, size);
1072} 1185}
1073 1186
1074/* read a full directory */ 1187/* read a full directory */
1075static void 1188static void
1076eio__scandir (eio_req *req, etp_worker *self) 1189eio__scandir (eio_req *req, etp_worker *self)
… …
1082 int namesoffs = 0; 1195 int namesoffs = 0;
1083 int flags = req->int1; 1196 int flags = req->int1;
1084 eio_dirent *dents = 0; 1197 eio_dirent *dents = 0;
1085 int dentalloc = 128; 1198 int dentalloc = 128;
1086 int dentoffs = 0; 1199 int dentoffs = 0;
1200 ino_t inode_bits = 0;
1087 1201
1088 req->result = -1; 1202 req->result = -1;
1089 1203
1090 if (!(flags & EIO_READDIR_DENTS)) 1204 if (!(flags & EIO_READDIR_DENTS))
1091 flags &= ~(EIO_READDIR_DIRS_FIRST | EIO_READDIR_STAT_ORDER); 1205 flags &= ~(EIO_READDIR_DIRS_FIRST | EIO_READDIR_STAT_ORDER);
1092 1206
1093 X_LOCK (wrklock); 1207 X_LOCK (wrklock);
1094 /* the corresponding closedir is in ETP_WORKER_CLEAR */ 1208 /* the corresponding closedir is in ETP_WORKER_CLEAR */
1095 self->dirp = dirp = opendir (req->ptr1); 1209 self->dirp = dirp = opendir (req->ptr1);
1096 req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE; 1210 req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE;
1097 req->ptr1 = names = malloc (namesalloc);
1098 req->ptr2 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0; 1211 req->ptr1 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0;
1212 req->ptr2 = names = malloc (namesalloc);
1099 X_UNLOCK (wrklock); 1213 X_UNLOCK (wrklock);
1100 1214
1101 if (dirp && names && (!flags || dents)) 1215 if (dirp && names && (!flags || dents))
1102 for (;;) 1216 for (;;)
1103 { 1217 {
… …
1111 1225
1112 /* sort etc. */ 1226 /* sort etc. */
1113 req->int1 = flags; 1227 req->int1 = flags;
1114 req->result = dentoffs; 1228 req->result = dentoffs;
1115 1229
1116 if (dents)
1117 {
1118 eio_dirent *ent = dents + dentoffs;
1119
1120 while (ent > dents)
1121 (--ent)->name = names + (size_t)ent->name;
1122 }
1123
1124 if (flags & EIO_READDIR_STAT_ORDER 1230 if (flags & EIO_READDIR_STAT_ORDER)
1125 || !(~flags & (EIO_READDIR_DIRS_FIRST | EIO_READDIR_FOUND_UNKNOWN))) 1231 eio_dent_sort (dents, dentoffs, 0, inode_bits); /* sort by inode exclusively */
1126 eio_dent_sort (dents, dentoffs); /* score depends of DIRS_FIRST */
1127 else if (flags & EIO_READDIR_DIRS_FIRST) 1232 else if (flags & EIO_READDIR_DIRS_FIRST)
1233 if (flags & EIO_READDIR_FOUND_UNKNOWN)
1234 eio_dent_sort (dents, dentoffs, 7, inode_bits); /* sort by score and inode */
1235 else
1128 { 1236 {
1129 /* in this case, all is known, and we just put dirs first and sort them */ 1237 /* in this case, all is known, and we just put dirs first and sort them */
1130 eio_dirent *ent = dents + dentoffs; 1238 eio_dirent *oth = dents + dentoffs;
1131 eio_dirent *dir = dents; 1239 eio_dirent *dir = dents;
1132 1240
1133 /* now move dirs to the front, and non-dirs to the back */ 1241 /* now partition dirs to the front, and non-dirs to the back */
1134 /* by walking from both sides and swapping if necessary */ 1242 /* by walking from both sides and swapping if necessary */
1243 /* also clear score, so it doesn't influence sorting */
1135 while (ent > dir) 1244 while (oth > dir)
1136 { 1245 {
1137 if (dir->type == DT_DIR) 1246 if (dir->type == EIO_DT_DIR)
1138 ++dir; 1247 ++dir;
1139 else
1140 {
1141 --ent;
1142
1143 if (ent->type == DT_DIR) 1248 else if ((--oth)->type == EIO_DT_DIR)
1144 { 1249 {
1145 eio_dirent tmp = *dir; 1250 eio_dirent tmp = *dir; *dir = *oth; *oth = tmp;
1146 *dir = *ent;
1147 *ent = tmp;
1148 1251
1149 ++dir; 1252 ++dir;
1150 } 1253 }
1151 } 1254 }
1152 }
1153 1255
1154 /* now sort the dirs only */ 1256 /* now sort the dirs only */
1155 eio_dent_sort (dents, dir - dents); 1257 eio_dent_sort (dents, dir - dents, 0, inode_bits);
1156 } 1258 }
1157
1158 /* only provide the names array unless DENTS is specified */
1159 if (!(flags & EIO_READDIR_DENTS))
1160 {
1161 X_LOCK (wrklock);
1162 assert (!dents);
1163 req->ptr1 = 0;
1164 req->ptr2 = names;
1165 X_UNLOCK (wrklock);
1166 }
1167 1259
1168 break; 1260 break;
1169 } 1261 }
1170 1262
1171 /* now add the entry to our list(s) */ 1263 /* now add the entry to our list(s) */
… …
1178 1270
1179 while (expect_false (namesoffs + len > namesalloc)) 1271 while (expect_false (namesoffs + len > namesalloc))
1180 { 1272 {
1181 namesalloc *= 2; 1273 namesalloc *= 2;
1182 X_LOCK (wrklock); 1274 X_LOCK (wrklock);
1183 req->ptr1 = names = realloc (names, namesalloc); 1275 req->ptr2 = names = realloc (names, namesalloc);
1184 X_UNLOCK (wrklock); 1276 X_UNLOCK (wrklock);
1185 1277
1186 if (!names) 1278 if (!names)
1187 break; 1279 break;
1188 } 1280 }
… …
1195 1287
1196 if (expect_false (dentoffs == dentalloc)) 1288 if (expect_false (dentoffs == dentalloc))
1197 { 1289 {
1198 dentalloc *= 2; 1290 dentalloc *= 2;
1199 X_LOCK (wrklock); 1291 X_LOCK (wrklock);
1200 req->ptr2 = dents = realloc (dents, dentalloc * sizeof (eio_dirent)); 1292 req->ptr1 = dents = realloc (dents, dentalloc * sizeof (eio_dirent));
1201 X_UNLOCK (wrklock); 1293 X_UNLOCK (wrklock);
1202 1294
1203 if (!dents) 1295 if (!dents)
1204 break; 1296 break;
1205 } 1297 }
1206 1298
1207 ent = dents + dentoffs; 1299 ent = dents + dentoffs;
1208 1300
1209 ent->name = (char *)(size_t)namesoffs; /* rather dirtily we store the offset in the pointer */ 1301 ent->nameofs = namesoffs; /* rather dirtily we store the offset in the pointer */
1210 ent->namelen = len - 1; 1302 ent->namelen = len - 1;
1211 ent->inode = D_INO (entp); 1303 ent->inode = D_INO (entp);
1304
1305 inode_bits |= ent->inode;
1212 1306
1213 switch (D_TYPE (entp)) 1307 switch (D_TYPE (entp))
1214 { 1308 {
1215 default: 1309 default:
1216 ent->type = EIO_DT_UNKNOWN; 1310 ent->type = EIO_DT_UNKNOWN;
… …
1259 #ifdef DT_WHT 1353 #ifdef DT_WHT
1260 case DT_WHT: ent->type = EIO_DT_WHT; break; 1354 case DT_WHT: ent->type = EIO_DT_WHT; break;
1261 #endif 1355 #endif
1262 } 1356 }
1263 1357
1264 ent->score = 0; 1358 ent->score = 7;
1265 1359
1266 if (flags & EIO_READDIR_DIRS_FIRST) 1360 if (flags & EIO_READDIR_DIRS_FIRST)
1267 { 1361 {
1268 if (ent->type == EIO_DT_UNKNOWN) 1362 if (ent->type == EIO_DT_UNKNOWN)
1269 { 1363 {
1270 if (*name == '.') /* leading dots are likely directories, and, in any case, rare */ 1364 if (*name == '.') /* leading dots are likely directories, and, in any case, rare */
1271 ent->score = 98; 1365 ent->score = 1;
1272 else if (!strchr (name, '.')) /* absense of dots indicate likely dirs */ 1366 else if (!strchr (name, '.')) /* absense of dots indicate likely dirs */
1273 ent->score = len <= 2 ? len + 6 : len <= 4 ? 5 : len <= 7 ? 4 : 1; /* shorter == more likely dir, but avoid too many classes */ 1367 ent->score = len <= 2 ? 4 - len : len <= 4 ? 4 : len <= 7 ? 5 : 6; /* shorter == more likely dir, but avoid too many classes */
1274 } 1368 }
1275 else if (ent->type == EIO_DT_DIR) 1369 else if (ent->type == EIO_DT_DIR)
1276 ent->score = 100; 1370 ent->score = 0;
1277 } 1371 }
1278 } 1372 }
1279 1373
1280 namesoffs += len; 1374 namesoffs += len;
1281 ++dentoffs; 1375 ++dentoffs;
… …
1288 } 1382 }
1289 } 1383 }
1290} 1384}
1291 1385
1292#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO) 1386#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO)
1293# undef msync
1294# define msync(a,b,c) ((errno = ENOSYS), -1) 1387# define eio__msync(a,b,c) ((errno = ENOSYS), -1)
1388#else
1389
1390int
1391eio__msync (void *mem, size_t len, int flags)
1392{
1393 if (EIO_MS_ASYNC != MS_SYNC
1394 || EIO_MS_INVALIDATE != MS_INVALIDATE
1395 || EIO_MS_SYNC != MS_SYNC)
1396 {
1397 flags = 0
1398 | (flags & EIO_MS_ASYNC ? MS_ASYNC : 0)
1399 | (flags & EIO_MS_INVALIDATE ? MS_INVALIDATE : 0)
1400 | (flags & EIO_MS_SYNC ? MS_SYNC : 0);
1401 }
1402
1403 return msync (mem, len, flags);
1404}
1405
1295#endif 1406#endif
1296 1407
1297int 1408int
1298eio__mtouch (void *mem, size_t len, int flags) 1409eio__mtouch (void *mem, size_t len, int flags)
1299{ 1410{
… …
1306 1417
1307 if (!page) 1418 if (!page)
1308 page = sysconf (_SC_PAGESIZE); 1419 page = sysconf (_SC_PAGESIZE);
1309#endif 1420#endif
1310 1421
1422 /* round down to start of page, although this is probably useless */
1311 addr &= ~(page - 1); /* assume page size is always a power of two */ 1423 addr &= ~(page - 1); /* assume page size is always a power of two */
1312 1424
1313 if (addr < end) 1425 if (addr < end)
1314 if (flags) /* modify */ 1426 if (flags & EIO_MT_MODIFY) /* modify */
1315 do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len); 1427 do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len);
1316 else 1428 else
1317 do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len); 1429 do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len);
1318 1430
1319 return 0; 1431 return 0;
… …
1467 case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT)); 1579 case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
1468 req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break; 1580 req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
1469 case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT)); 1581 case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
1470 req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break; 1582 req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
1471 1583
1584 case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
1585 req->result = statvfs (req->ptr1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
1586 case EIO_FSTATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
1587 req->result = fstatvfs (req->int1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
1588
1472 case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break; 1589 case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
1473 case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break; 1590 case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
1474 case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break; 1591 case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
1475 case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break; 1592 case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
1476 case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break; 1593 case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
… …
1491 req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break; 1608 req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;
1492 1609
1493 case EIO_SYNC: req->result = 0; sync (); break; 1610 case EIO_SYNC: req->result = 0; sync (); break;
1494 case EIO_FSYNC: req->result = fsync (req->int1); break; 1611 case EIO_FSYNC: req->result = fsync (req->int1); break;
1495 case EIO_FDATASYNC: req->result = fdatasync (req->int1); break; 1612 case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
1496 case EIO_MSYNC: req->result = msync (req->ptr2, req->size, req->int1); break; 1613 case EIO_MSYNC: req->result = eio__msync (req->ptr2, req->size, req->int1); break;
1497 case EIO_MTOUCH: req->result = eio__mtouch (req->ptr2, req->size, req->int1); break; 1614 case EIO_MTOUCH: req->result = eio__mtouch (req->ptr2, req->size, req->int1); break;
1498 case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break; 1615 case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;
1499 1616
1500 case EIO_READDIR: eio__scandir (req, self); break; 1617 case EIO_READDIR: eio__scandir (req, self); break;
1501 1618
… …
1623eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data) 1740eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data)
1624{ 1741{
1625 REQ (EIO_FSTAT); req->int1 = fd; SEND; 1742 REQ (EIO_FSTAT); req->int1 = fd; SEND;
1626} 1743}
1627 1744
1745eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data)
1746{
1747 REQ (EIO_FSTATVFS); req->int1 = fd; SEND;
1748}
1749
1628eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data) 1750eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data)
1629{ 1751{
1630 REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND; 1752 REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;
1631} 1753}
1632 1754
… …
1702} 1824}
1703 1825
1704eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data) 1826eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data)
1705{ 1827{
1706 return eio__1path (EIO_LSTAT, path, pri, cb, data); 1828 return eio__1path (EIO_LSTAT, path, pri, cb, data);
1829}
1830
1831eio_req *eio_statvfs (const char *path, int pri, eio_cb cb, void *data)
1832{
1833 return eio__1path (EIO_STATVFS, path, pri, cb, data);
1707} 1834}
1708 1835
1709eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data) 1836eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data)
1710{ 1837{
1711 return eio__1path (EIO_UNLINK, path, pri, cb, data); 1838 return eio__1path (EIO_UNLINK, path, pri, cb, data);

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