1 | #!python3 |
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2 | # |
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3 | # Cforall Version 1.0.0 Copyright (C) 2020 University of Waterloo |
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4 | # |
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5 | # The contents of this file are covered under the licence agreement in the |
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6 | # file "LICENCE" distributed with Cforall. |
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7 | # |
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8 | # call.cfa.in -- Python script to generate io/call.cfa |
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9 | # |
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10 | # Author : Thierry Delisle |
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11 | # Created On : Fri Sep 11 12:41:16 2020 |
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12 | # Last Modified By : |
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13 | # Last Modified On : |
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14 | # Update Count : |
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15 | # |
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16 | |
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17 | Header = """// |
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18 | // Cforall Version 1.0.0 Copyright (C) 2020 University of Waterloo |
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19 | // |
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20 | // The contents of this file are covered under the licence agreement in the |
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21 | // file "LICENCE" distributed with Cforall. |
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22 | // |
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23 | // call.cfa -- Api for cforall |
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24 | // |
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25 | // Author : Generated from call.cfa.in |
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26 | // Created On : {} |
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27 | // |
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28 | |
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29 | """ |
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30 | |
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31 | Prelude = """#define __cforall_thread__ |
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32 | |
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33 | #include "bits/defs.hfa" |
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34 | #include "kernel.hfa" |
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35 | #include "io/types.hfa" |
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36 | |
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37 | //============================================================================================= |
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38 | // I/O uring backend |
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39 | //============================================================================================= |
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40 | |
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41 | #if defined(CFA_HAVE_LINUX_IO_URING_H) |
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42 | #include <assert.h> |
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43 | #include <stdint.h> |
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44 | #include <errno.h> |
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45 | #include <linux/io_uring.h> |
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46 | |
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47 | #include "kernel/fwd.hfa" |
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48 | |
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49 | static const __u8 REGULAR_FLAGS = 0 |
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50 | #if defined(CFA_HAVE_IOSQE_FIXED_FILE) |
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51 | | IOSQE_FIXED_FILE |
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52 | #endif |
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53 | #if defined(CFA_HAVE_IOSQE_IO_DRAIN) |
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54 | | IOSQE_IO_DRAIN |
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55 | #endif |
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56 | #if defined(CFA_HAVE_IOSQE_ASYNC) |
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57 | | IOSQE_ASYNC |
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58 | #endif |
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59 | ; |
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60 | |
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61 | static const __u32 LINK_FLAGS = 0 |
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62 | #if defined(CFA_HAVE_IOSQE_IO_LINK) |
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63 | | IOSQE_IO_LINK |
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64 | #endif |
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65 | #if defined(CFA_HAVE_IOSQE_IO_HARDLINK) |
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66 | | IOSQE_IO_HARDLINK |
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67 | #endif |
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68 | ; |
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69 | |
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70 | static const __u32 SPLICE_FLAGS = 0 |
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71 | #if defined(CFA_HAVE_SPLICE_F_FD_IN_FIXED) |
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72 | | SPLICE_F_FD_IN_FIXED |
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73 | #endif |
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74 | ; |
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75 | |
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76 | extern [* volatile struct io_uring_sqe, __u32] __submit_alloc( struct __io_data & ring, __u64 data ); |
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77 | extern void __submit( struct io_context * ctx, __u32 idx ) __attribute__((nonnull (1))); |
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78 | |
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79 | static inline io_context * __get_io_context( void ) { |
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80 | cluster * cltr = active_cluster(); |
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81 | |
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82 | /* paranoid */ verifyf( cltr, "No active cluster for io operation\\n"); |
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83 | assertf( cltr->io.cnt > 0, "Cluster %p has no default io contexts and no context was specified\\n", cltr ); |
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84 | |
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85 | /* paranoid */ verifyf( cltr->io.ctxs, "default io contexts for cluster %p are missing\\n", cltr); |
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86 | return &cltr->io.ctxs[ thread_rand() % cltr->io.cnt ]; |
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87 | } |
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88 | #endif |
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89 | |
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90 | //============================================================================================= |
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91 | // I/O Forwards |
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92 | //============================================================================================= |
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93 | #include <time.hfa> |
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94 | |
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95 | // Some forward declarations |
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96 | #include <errno.h> |
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97 | #include <unistd.h> |
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98 | |
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99 | extern "C" { |
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100 | #include <sys/types.h> |
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101 | #include <sys/socket.h> |
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102 | #include <sys/syscall.h> |
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103 | |
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104 | #if defined(CFA_HAVE_PREADV2) |
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105 | struct iovec; |
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106 | extern ssize_t preadv2 (int fd, const struct iovec *iov, int iovcnt, off_t offset, int flags); |
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107 | #endif |
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108 | #if defined(CFA_HAVE_PWRITEV2) |
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109 | struct iovec; |
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110 | extern ssize_t pwritev2(int fd, const struct iovec *iov, int iovcnt, off_t offset, int flags); |
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111 | #endif |
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112 | |
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113 | extern int fsync(int fd); |
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114 | |
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115 | #if __OFF_T_MATCHES_OFF64_T |
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116 | typedef __off64_t off_t; |
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117 | #else |
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118 | typedef __off_t off_t; |
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119 | #endif |
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120 | typedef __off64_t off64_t; |
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121 | extern int sync_file_range(int fd, off64_t offset, off64_t nbytes, unsigned int flags); |
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122 | |
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123 | struct msghdr; |
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124 | struct sockaddr; |
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125 | extern ssize_t sendmsg(int sockfd, const struct msghdr *msg, int flags); |
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126 | extern ssize_t recvmsg(int sockfd, struct msghdr *msg, int flags); |
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127 | extern ssize_t send(int sockfd, const void *buf, size_t len, int flags); |
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128 | extern ssize_t recv(int sockfd, void *buf, size_t len, int flags); |
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129 | extern int accept4(int sockfd, struct sockaddr *addr, socklen_t *addrlen, int flags); |
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130 | extern int connect(int sockfd, const struct sockaddr *addr, socklen_t addrlen); |
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131 | |
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132 | extern int fallocate(int fd, int mode, off_t offset, off_t len); |
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133 | extern int posix_fadvise(int fd, off_t offset, off_t len, int advice); |
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134 | extern int madvise(void *addr, size_t length, int advice); |
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135 | |
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136 | extern int openat(int dirfd, const char *pathname, int flags, mode_t mode); |
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137 | extern int close(int fd); |
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138 | |
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139 | extern ssize_t read (int fd, void *buf, size_t count); |
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140 | |
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141 | struct epoll_event; |
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142 | extern int epoll_ctl(int epfd, int op, int fd, struct epoll_event *event); |
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143 | |
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144 | extern ssize_t splice(int fd_in, loff_t *off_in, int fd_out, loff_t *off_out, size_t len, unsigned int flags); |
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145 | extern ssize_t tee(int fd_in, int fd_out, size_t len, unsigned int flags); |
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146 | } |
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147 | |
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148 | //============================================================================================= |
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149 | // I/O Interface |
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150 | //============================================================================================= |
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151 | """ |
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152 | |
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153 | print(Header.format("A Date")) |
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154 | print(Prelude) |
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155 | |
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156 | import re |
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157 | import sys |
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158 | class Call: |
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159 | def __init__(self, op, signature, body, define=None): |
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160 | sig = re.search("(.*) (.*)\((.*)\)", signature) |
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161 | if not sig: |
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162 | print("OP '{}' has invalid signature {}".format(op, signature), file=sys.stderr) |
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163 | sys.exit(1) |
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164 | |
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165 | self.op = op |
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166 | self.ret = sig.group(1) |
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167 | self.name = sig.group(2) |
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168 | self.params = sig.group(3) |
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169 | self.define = define |
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170 | self.body = "" |
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171 | |
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172 | accepted_keys = [ 'ioprio', 'fd', 'off', 'addr2','addr', 'splice_off_in','len', |
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173 | 'rw_flags', 'fsync_flags', 'poll_events', 'poll32_events', |
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174 | 'sync_range_flags', 'msg_flags', 'timeout_flags', 'accept_flags', |
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175 | 'cancel_flags', 'open_flags', 'statx_flags', 'fadvise_advice', |
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176 | 'splice_flags', 'buf_index' ,'buf_group' 'personality', |
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177 | 'splice_fd_in' ] |
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178 | |
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179 | for k, v in body.items(): |
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180 | if not k in accepted_keys: |
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181 | print("OP '{}' has invalid body kew {}".format(op, k), file=sys.stderr) |
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182 | sys.exit(1) |
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183 | |
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184 | self.body += "\n sqe->{key} = {value};".format(key=k, value=v) |
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185 | |
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186 | |
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187 | def args(self): |
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188 | param_a = self.params.split(',') |
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189 | args_a = [p.replace('*', ' ').split()[-1] for p in param_a] |
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190 | for a in args_a: |
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191 | if '*' in a: |
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192 | print("OP '{}' has invalid * in argument {}".format(self.op, a), file=sys.stderr) |
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193 | sys.exit(1) |
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194 | |
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195 | return ', '.join(args_a) |
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196 | |
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197 | AsyncTemplate = """inline void async_{name}(io_future_t & future, {params}, int submit_flags, io_cancellation * cancellation, io_context * context) {{ |
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198 | #if !defined(CFA_HAVE_LINUX_IO_URING_H) || !defined(CFA_HAVE_IORING_OP_{op}) |
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199 | ssize_t res = {name}({args}); |
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200 | if (res >= 0) {{ |
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201 | fulfil(future, res); |
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202 | }} |
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203 | else {{ |
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204 | fulfil(future, -errno); |
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205 | }} |
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206 | #else |
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207 | // we don't support LINK yet |
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208 | if( 0 != (submit_flags & LINK_FLAGS) ) {{ |
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209 | errno = ENOTSUP; return -1; |
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210 | }} |
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211 | |
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212 | if( !context ) {{ |
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213 | context = __get_io_context(); |
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214 | }} |
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215 | if(cancellation) {{ |
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216 | cancellation->target = (__u64)(uintptr_t)&future; |
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217 | }} |
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218 | |
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219 | __u8 sflags = REGULAR_FLAGS & submit_flags; |
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220 | struct __io_data & ring = *context->thrd.ring; |
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221 | |
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222 | __u32 idx; |
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223 | struct io_uring_sqe * sqe; |
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224 | [(volatile struct io_uring_sqe *) sqe, idx] = __submit_alloc( ring, (__u64)(uintptr_t)&future ); |
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225 | |
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226 | sqe->opcode = IORING_OP_{op}; |
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227 | sqe->flags = sflags; |
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228 | sqe->ioprio = 0; |
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229 | sqe->fd = 0; |
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230 | sqe->off = 0; |
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231 | sqe->addr = 0; |
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232 | sqe->len = 0; |
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233 | sqe->accept_flags = 0; |
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234 | sqe->__pad2[0] = 0; |
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235 | sqe->__pad2[1] = 0; |
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236 | sqe->__pad2[2] = 0;{body} |
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237 | |
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238 | asm volatile("": : :"memory"); |
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239 | |
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240 | verify( sqe->user_data == (__u64)(uintptr_t)&future ); |
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241 | __submit( context, idx ); |
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242 | #endif |
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243 | }}""" |
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244 | |
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245 | SyncTemplate = """{ret} cfa_{name}({params}, int submit_flags, Duration timeout, io_cancellation * cancellation, io_context * context) {{ |
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246 | if( timeout >= 0 ) {{ |
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247 | errno = ENOTSUP; |
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248 | return -1; |
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249 | }} |
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250 | io_future_t future; |
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251 | |
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252 | async_{name}( future, {args}, submit_flags, cancellation, context ); |
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253 | |
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254 | wait( future ); |
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255 | if( future.result < 0 ) {{ |
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256 | errno = -future.result; |
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257 | return -1; |
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258 | }} |
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259 | return future.result; |
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260 | }}""" |
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261 | |
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262 | calls = [ |
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263 | # CFA_HAVE_IORING_OP_READV |
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264 | Call('READV', 'ssize_t preadv2(int fd, const struct iovec *iov, int iovcnt, off_t offset, int flags)', { |
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265 | 'fd' : 'fd', |
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266 | 'off' : 'offset', |
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267 | 'addr': '(__u64)iov', |
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268 | 'len' : 'iovcnt', |
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269 | }, define = 'CFA_HAVE_PREADV2'), |
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270 | # CFA_HAVE_IORING_OP_WRITEV |
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271 | Call('WRITEV', 'ssize_t pwritev2(int fd, const struct iovec *iov, int iovcnt, off_t offset, int flags)', { |
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272 | 'fd' : 'fd', |
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273 | 'off' : 'offset', |
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274 | 'addr': '(__u64)iov', |
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275 | 'len' : 'iovcnt' |
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276 | }, define = 'CFA_HAVE_PWRITEV2'), |
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277 | # CFA_HAVE_IORING_OP_FSYNC |
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278 | Call('FSYNC', 'int fsync(int fd)', { |
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279 | 'fd': 'fd' |
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280 | }), |
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281 | # CFA_HAVE_IORING_OP_EPOLL_CTL |
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282 | Call('EPOLL_CTL', 'int epoll_ctl(int epfd, int op, int fd, struct epoll_event *event)', { |
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283 | 'fd': 'epfd', |
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284 | 'addr': 'fd', |
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285 | 'len': 'op', |
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286 | 'off': '(__u64)event' |
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287 | }), |
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288 | # CFA_HAVE_IORING_OP_SYNC_FILE_RANGE |
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289 | Call('SYNC_FILE_RANGE', 'int sync_file_range(int fd, off64_t offset, off64_t nbytes, unsigned int flags)', { |
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290 | 'fd': 'fd', |
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291 | 'off': 'offset', |
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292 | 'len': 'nbytes', |
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293 | 'sync_range_flags': 'flags' |
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294 | }), |
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295 | # CFA_HAVE_IORING_OP_SENDMSG |
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296 | Call('SENDMSG', 'ssize_t sendmsg(int sockfd, const struct msghdr *msg, int flags)', { |
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297 | 'fd': 'sockfd', |
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298 | 'addr': '(__u64)(struct msghdr *)msg', |
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299 | 'len': '1', |
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300 | 'msg_flags': 'flags' |
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301 | }), |
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302 | # CFA_HAVE_IORING_OP_RECVMSG |
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303 | Call('RECVMSG', 'ssize_t recvmsg(int sockfd, struct msghdr *msg, int flags)', { |
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304 | 'fd': 'sockfd', |
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305 | 'addr': '(__u64)(struct msghdr *)msg', |
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306 | 'len': '1', |
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307 | 'msg_flags': 'flags' |
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308 | }), |
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309 | # CFA_HAVE_IORING_OP_SEND |
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310 | Call('SEND', 'ssize_t send(int sockfd, const void *buf, size_t len, int flags)', { |
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311 | 'fd': 'sockfd', |
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312 | 'addr': '(__u64)buf', |
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313 | 'len': 'len', |
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314 | 'msg_flags': 'flags' |
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315 | }), |
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316 | # CFA_HAVE_IORING_OP_RECV |
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317 | Call('RECV', 'ssize_t recv(int sockfd, void *buf, size_t len, int flags)', { |
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318 | 'fd': 'sockfd', |
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319 | 'addr': '(__u64)buf', |
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320 | 'len': 'len', |
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321 | 'msg_flags': 'flags' |
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322 | }), |
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323 | # CFA_HAVE_IORING_OP_ACCEPT |
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324 | Call('ACCEPT', 'int accept4(int sockfd, struct sockaddr *addr, socklen_t *addrlen, int flags)', { |
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325 | 'fd': 'sockfd', |
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326 | 'addr': '(__u64)addr', |
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327 | 'addr2': '(__u64)addrlen', |
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328 | 'accept_flags': 'flags' |
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329 | }), |
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330 | # CFA_HAVE_IORING_OP_CONNECT |
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331 | Call('CONNECT', 'int connect(int sockfd, const struct sockaddr *addr, socklen_t addrlen)', { |
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332 | 'fd': 'sockfd', |
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333 | 'addr': '(__u64)addr', |
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334 | 'off': 'addrlen' |
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335 | }), |
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336 | # CFA_HAVE_IORING_OP_FALLOCATE |
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337 | Call('FALLOCATE', 'int fallocate(int fd, int mode, off_t offset, off_t len)', { |
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338 | 'fd': 'fd', |
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339 | 'addr': '(__u64)len', |
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340 | 'len': 'mode', |
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341 | 'off': 'offset' |
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342 | }), |
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343 | # CFA_HAVE_IORING_OP_FADVISE |
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344 | Call('FADVISE', 'int posix_fadvise(int fd, off_t offset, off_t len, int advice)', { |
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345 | 'fd': 'fd', |
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346 | 'off': 'offset', |
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347 | 'len': 'len', |
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348 | 'fadvise_advice': 'advice' |
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349 | }), |
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350 | # CFA_HAVE_IORING_OP_MADVISE |
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351 | Call('MADVISE', 'int madvise(void *addr, size_t length, int advice)', { |
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352 | 'addr': '(__u64)addr', |
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353 | 'len': 'length', |
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354 | 'fadvise_advice': 'advice' |
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355 | }), |
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356 | # CFA_HAVE_IORING_OP_OPENAT |
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357 | Call('OPENAT', 'int openat(int dirfd, const char *pathname, int flags, mode_t mode)', { |
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358 | 'fd': 'dirfd', |
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359 | 'addr': '(__u64)pathname', |
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360 | 'len': 'mode', |
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361 | 'open_flags': 'flags;' |
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362 | }), |
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363 | # CFA_HAVE_IORING_OP_OPENAT2 |
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364 | Call('OPENAT2', 'int openat2(int dirfd, const char *pathname, struct open_how * how, size_t size)', { |
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365 | 'fd': 'dirfd', |
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366 | 'addr': 'pathname', |
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367 | 'len': 'sizeof(*how)', |
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368 | 'off': '(__u64)how', |
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369 | }, define = 'CFA_HAVE_OPENAT2'), |
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370 | # CFA_HAVE_IORING_OP_CLOSE |
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371 | Call('CLOSE', 'int close(int fd)', { |
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372 | 'fd': 'fd' |
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373 | }), |
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374 | # CFA_HAVE_IORING_OP_STATX |
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375 | Call('STATX', 'int statx(int dirfd, const char *pathname, int flags, unsigned int mask, struct statx *statxbuf)', { |
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376 | 'fd': 'dirfd', |
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377 | 'off': '(__u64)statxbuf', |
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378 | 'addr': 'pathname', |
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379 | 'len': 'mask', |
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380 | 'statx_flags': 'flags' |
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381 | }, define = 'CFA_HAVE_STATX'), |
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382 | # CFA_HAVE_IORING_OP_READ |
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383 | Call('READ', 'ssize_t read(int fd, void * buf, size_t count)', { |
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384 | 'fd': 'fd', |
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385 | 'addr': '(__u64)buf', |
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386 | 'len': 'count' |
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387 | }), |
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388 | # CFA_HAVE_IORING_OP_WRITE |
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389 | Call('WRITE', 'ssize_t write(int fd, void * buf, size_t count)', { |
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390 | 'fd': 'fd', |
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391 | 'addr': '(__u64)buf', |
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392 | 'len': 'count' |
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393 | }), |
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394 | # CFA_HAVE_IORING_OP_SPLICE |
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395 | Call('SPLICE', 'ssize_t splice(int fd_in, loff_t *off_in, int fd_out, loff_t *off_out, size_t len, unsigned int flags)', { |
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396 | 'splice_fd_in': 'fd_in', |
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397 | 'splice_off_in': 'off_in ? (__u64)*off_in : (__u64)-1', |
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398 | 'fd': 'fd_out', |
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399 | 'off': 'off_out ? (__u64)*off_out : (__u64)-1', |
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400 | 'len': 'len', |
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401 | 'splice_flags': 'flags' |
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402 | }), |
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403 | # CFA_HAVE_IORING_OP_TEE |
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404 | Call('TEE', 'ssize_t tee(int fd_in, int fd_out, size_t len, unsigned int flags)', { |
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405 | 'splice_fd_in': 'fd_in', |
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406 | 'fd': 'fd_out', |
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407 | 'len': 'len', |
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408 | 'splice_flags': 'flags' |
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409 | }) |
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410 | ] |
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411 | |
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412 | print("//----------") |
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413 | print("// synchronous calls") |
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414 | for c in calls: |
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415 | if c.define: |
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416 | print("""#if defined({define}) |
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417 | {ret} cfa_{name}({params}, int submit_flags, Duration timeout, io_cancellation * cancellation, io_context * context); |
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418 | #endif""".format(define=c.define,ret=c.ret, name=c.name, params=c.params)) |
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419 | else: |
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420 | print("{ret} cfa_{name}({params}, int submit_flags, Duration timeout, io_cancellation * cancellation, io_context * context);" |
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421 | .format(ret=c.ret, name=c.name, params=c.params)) |
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422 | |
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423 | print("\n//----------") |
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424 | print("// asynchronous calls") |
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425 | for c in calls: |
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426 | if c.define: |
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427 | print("""#if defined({define}) |
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428 | void async_{name}(io_future_t & future, {params}, int submit_flags, io_cancellation * cancellation, io_context * context); |
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429 | #endif""".format(define=c.define,name=c.name, params=c.params)) |
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430 | else: |
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431 | print("void async_{name}(io_future_t & future, {params}, int submit_flags, io_cancellation * cancellation, io_context * context);" |
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432 | .format(name=c.name, params=c.params)) |
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433 | print("\n") |
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434 | |
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435 | for c in calls: |
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436 | print("//-----------------------------------------------------------------------------") |
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437 | print("// {}".format(c.name)) |
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438 | Async = AsyncTemplate.format( |
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439 | name = c.name, |
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440 | ret = c.ret, |
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441 | params = c.params, |
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442 | args = c.args(), |
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443 | op = c.op, |
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444 | body = c.body |
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445 | |
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446 | ) |
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447 | Sync = SyncTemplate.format( |
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448 | name = c.name, |
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449 | ret = c.ret, |
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450 | params = c.params, |
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451 | args = c.args() |
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452 | ) |
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453 | |
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454 | if c.define: |
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455 | print("""#if defined({}) |
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456 | //---------- |
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457 | // asynchronous call |
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458 | {} |
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459 | |
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460 | //---------- |
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461 | // synchronous call |
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462 | {} |
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463 | #endif |
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464 | """.format(c.define, "\n\t".join( Async.splitlines() ), "\n\t".join( Sync.splitlines() ))) |
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465 | else : |
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466 | print("""//---------- |
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467 | // asynchronous call |
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468 | {} |
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469 | |
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470 | //---------- |
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471 | // synchronous call |
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472 | {} |
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473 | """.format(Async, Sync)) |
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474 | |
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475 | print(""" |
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476 | //----------------------------------------------------------------------------- |
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477 | bool cancel(io_cancellation & this) { |
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478 | #if !defined(CFA_HAVE_LINUX_IO_URING_H) || !defined(CFA_HAVE_IORING_OP_ASYNC_CANCEL) |
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479 | return false; |
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480 | #else |
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481 | io_future_t future; |
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482 | |
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483 | io_context * context = __get_io_context(); |
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484 | |
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485 | __u8 sflags = 0; |
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486 | struct __io_data & ring = *context->thrd.ring; |
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487 | |
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488 | __u32 idx; |
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489 | volatile struct io_uring_sqe * sqe; |
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490 | [sqe, idx] = __submit_alloc( ring, (__u64)(uintptr_t)&future ); |
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491 | |
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492 | sqe->__pad2[0] = sqe->__pad2[1] = sqe->__pad2[2] = 0; |
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493 | sqe->opcode = IORING_OP_ASYNC_CANCEL; |
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494 | sqe->flags = sflags; |
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495 | sqe->addr = this.target; |
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496 | |
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497 | verify( sqe->user_data == (__u64)(uintptr_t)&future ); |
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498 | __submit( context, idx ); |
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499 | |
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500 | wait(future); |
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501 | |
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502 | if( future.result == 0 ) return true; // Entry found |
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503 | if( future.result == -EALREADY) return true; // Entry found but in progress |
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504 | if( future.result == -ENOENT ) return false; // Entry not found |
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505 | return false; |
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506 | #endif |
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507 | } |
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508 | |
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509 | //----------------------------------------------------------------------------- |
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510 | // Check if a function is has asynchronous |
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511 | bool has_user_level_blocking( fptr_t func ) { |
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512 | #if defined(CFA_HAVE_LINUX_IO_URING_H)""") |
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513 | |
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514 | for c in calls: |
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515 | if c.define: |
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516 | print(""" #if defined({define}) |
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517 | if( /*func == (fptr_t)preadv2 || */ |
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518 | func == (fptr_t)cfa_{name} || |
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519 | func == (fptr_t)async_{name} ) {{ |
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520 | #if defined(CFA_HAVE_IORING_OP_{op}) |
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521 | return true; |
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522 | #else |
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523 | return false; |
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524 | #endif |
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525 | }} |
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526 | #endif""".format(define=c.define, name=c.name, op=c.op)) |
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527 | else: |
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528 | print(""" if( /*func == (fptr_t)preadv2 || */ |
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529 | func == (fptr_t)cfa_{name} || |
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530 | func == (fptr_t)async_{name} ) {{ |
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531 | #if defined(CFA_HAVE_IORING_OP_{op}) |
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532 | return true; |
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533 | #else |
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534 | return false; |
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535 | #endif |
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536 | }}""".format(name=c.name, op=c.op)) |
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537 | |
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538 | print(""" #endif |
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539 | |
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540 | return false; |
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541 | }""") |
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