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20 | #define ntohll(netlong) __bswap_64(netlong) |
20 | #define ntohll(netlong) __bswap_64(netlong) |
21 | #else |
21 | #else |
22 | error, you should not exist |
22 | error, you should not exist |
23 | #endif |
23 | #endif |
24 | |
24 | |
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25 | struct rstate { |
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26 | struct nbd_request req; |
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27 | u32 req_read; /* how many octets of req are valid */ |
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28 | u32 data_read; /* how many octets of the data sv are valid */ |
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29 | }; |
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30 | |
25 | MODULE = Linux::NBD PACKAGE = Linux::NBD::Client |
31 | MODULE = Linux::NBD PACKAGE = Linux::NBD::Client |
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32 | |
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33 | PROTOTYPES: DISABLE |
26 | |
34 | |
27 | void |
35 | void |
28 | _set_sock (int dev, int fd) |
36 | _set_sock (int dev, int fd) |
29 | CODE: |
37 | CODE: |
30 | ioctl (dev, NBD_SET_SOCK, (unsigned long)fd); |
38 | ioctl (dev, NBD_SET_SOCK, (unsigned long)fd); |
… | |
… | |
63 | ioctl (dev, NBD_SET_BLKSIZE, blocksize); |
71 | ioctl (dev, NBD_SET_BLKSIZE, blocksize); |
64 | |
72 | |
65 | void |
73 | void |
66 | _set_size (int dev, unsigned long size) |
74 | _set_size (int dev, unsigned long size) |
67 | CODE: |
75 | CODE: |
68 | ioctl (dev, NBD_SET_BLKSIZE, size); |
76 | ioctl (dev, NBD_SET_SIZE, size); |
69 | |
77 | |
70 | void |
78 | void |
71 | _set_size_blocks (int dev, unsigned long nblocks) |
79 | _set_size_blocks (int dev, unsigned long nblocks) |
72 | CODE: |
80 | CODE: |
73 | ioctl (dev, NBD_SET_SIZE_BLOCKS, nblocks); |
81 | ioctl (dev, NBD_SET_SIZE_BLOCKS, nblocks); |
74 | |
82 | |
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83 | void |
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84 | _set_timeout (int dev, unsigned long timeout) |
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85 | CODE: |
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86 | ioctl (dev, NBD_SET_TIMEOUT, timeout); |
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87 | |
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88 | void |
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89 | _print_debug (int dev) |
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90 | CODE: |
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91 | ioctl (dev, NBD_PRINT_DEBUG, 0); |
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92 | |
75 | MODULE = Linux::NBD PACKAGE = Linux::NBD::Server |
93 | MODULE = Linux::NBD PACKAGE = Linux::NBD::Server |
76 | |
94 | |
77 | void |
95 | void |
78 | _one_request (SV *obj, int fd) |
96 | _one_request (SV *obj, int fd) |
79 | CODE: |
97 | CODE: |
80 | { |
98 | { |
81 | struct nbd_request req; |
99 | struct rstate *s; |
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100 | u64 from; |
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101 | u32 len; |
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102 | char *method; |
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103 | MAGIC *mg = mg_find (SvRV (obj), PERL_MAGIC_ext); |
82 | |
104 | |
83 | if (read (fd, &req, sizeof (req)) == sizeof (req)) |
105 | if (!mg) |
84 | { |
106 | { |
85 | if (req.magic == htonl (NBD_REQUEST_MAGIC)) |
107 | mg = sv_magicext (SvRV (obj), 0, PERL_MAGIC_ext, 0, 0, 0); |
86 | { |
108 | mg->mg_len = sizeof (struct rstate); |
87 | req.type = htonl (req.type); |
109 | New (0, mg->mg_ptr, mg->mg_len, char); |
88 | |
110 | |
89 | if (req.type < 2) |
111 | ((struct rstate *)mg->mg_ptr)->req_read = 0; /* initialise the state machine */ |
90 | { |
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91 | u64 from = ntohll (req.from); |
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92 | |
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93 | PUSHMARK (SP); |
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94 | EXTEND (SP, 3); |
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95 | PUSHs (obj); |
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96 | PUSHs (sv_2mortal (newSVpvn (req.handle, sizeof (req.handle)))); |
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97 | PUSHs (sv_2mortal (sizeof (UV) < 8 && from > (0xffffffffUL) |
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98 | ? newSVnv (from) |
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99 | : newSVuv (from))); |
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100 | PUSHs (sv_2mortal (newSVuv (ntohl (req.len)))); |
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101 | PUTBACK; |
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102 | call_method (req.type ? "req_write" : "req_read", G_DISCARD); |
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103 | SPAGAIN; |
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104 | |
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105 | XSRETURN_NO; |
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106 | } |
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107 | } |
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108 | } |
112 | } |
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113 | |
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114 | s = (struct rstate *)mg->mg_ptr; |
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115 | |
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116 | if (s->req_read < sizeof (struct nbd_request)) |
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117 | { |
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118 | int res = read (fd, s->req_read + (char *)&s->req, sizeof (struct nbd_request) - s->req_read); |
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119 | |
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120 | if (res > 0) |
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121 | s->req_read += res; |
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122 | else if (res == 0) |
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123 | XSRETURN_UNDEF; /* should req->eof */ |
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124 | else if (errno != EAGAIN && errno != EWOULDBLOCK) |
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125 | XSRETURN_UNDEF; /* should req->error */ |
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126 | |
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127 | s->data_read = 0; |
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128 | } |
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129 | |
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130 | if (s->req_read < sizeof (struct nbd_request)) |
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131 | XSRETURN_NO; |
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132 | |
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133 | /* now we have a full request, so check for data */ |
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134 | if (s->req.magic != htonl (NBD_REQUEST_MAGIC)) |
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135 | croak ("Linux::NBD::Server received illegal request magic %08lx - protocol error.\n", ntohl (s->req.magic)); |
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136 | |
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137 | from = ntohll (s->req.from); |
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138 | len = ntohl (s->req.len); |
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139 | |
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140 | switch (ntohl (s->req.type)) |
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141 | { |
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142 | case NBD_CMD_WRITE: |
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143 | if (!mg->mg_obj) |
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144 | { |
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145 | mg->mg_flags |= MGf_REFCOUNTED; |
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146 | mg->mg_obj = NEWSV (0, len); |
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147 | SvPOK_only (mg->mg_obj); |
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148 | SvCUR_set (mg->mg_obj, len); |
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149 | } |
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150 | |
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151 | if (s->data_read < len) |
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152 | { |
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153 | int res = read (fd, s->data_read + SvPVX (mg->mg_obj), len - s->data_read); |
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154 | |
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155 | if (res > 0) |
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156 | s->data_read += res; |
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157 | else if (res == 0) |
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158 | XSRETURN_UNDEF; /* should req->eof */ |
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159 | else if (errno != EAGAIN && errno != EWOULDBLOCK) |
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160 | XSRETURN_UNDEF; /* should req->error */ |
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161 | } |
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162 | |
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163 | if (s->data_read < len) |
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164 | XSRETURN_NO; |
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165 | |
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166 | /* fallthrough */ |
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167 | case NBD_CMD_READ: |
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168 | s->req_read = 0; |
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169 | |
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170 | PUSHMARK (SP); |
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171 | EXTEND (SP, 4); |
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172 | PUSHs (obj); |
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173 | PUSHs (sv_2mortal (newSVpvn (s->req.handle, sizeof (s->req.handle)))); |
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174 | PUSHs (sv_2mortal (sizeof (UV) < 8 && from > 0xffffffffUL |
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175 | ? newSVnv (from) |
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176 | : newSVuv (from))); |
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177 | |
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178 | if (mg->mg_obj) |
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179 | { |
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180 | PUSHs (sv_2mortal (mg->mg_obj)); |
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181 | mg->mg_obj = 0; |
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182 | method = "req_write"; |
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183 | } |
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184 | else |
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185 | { |
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186 | PUSHs (sv_2mortal (newSVuv (len))); |
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187 | method = "req_read"; |
|
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188 | } |
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189 | |
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190 | break; |
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191 | |
|
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192 | case NBD_CMD_DISC: |
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193 | s->req_read = 0; |
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194 | |
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195 | method = "req_disc"; |
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196 | |
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197 | PUSHMARK (SP); |
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198 | XPUSHs (obj); |
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199 | |
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200 | break; |
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201 | |
|
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202 | default: |
|
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203 | croak ("Linux::NBD::Server received unsupported request type %d.\n", ntohl (s->req.type)); |
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204 | } |
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205 | |
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206 | PUTBACK; |
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207 | call_method (method, G_DISCARD); |
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208 | SPAGAIN; |
109 | |
209 | |
110 | XSRETURN_YES; |
210 | XSRETURN_YES; |
111 | } |
211 | } |
112 | |
212 | |
113 | SV * |
213 | SV * |
114 | _format_reply (SV *handle, unsigned int error = 0, SV *data = 0) |
214 | format_reply (SV *unused, SV *handle, unsigned int error = 0, SV *data = 0) |
115 | CODE: |
215 | CODE: |
116 | { |
216 | { |
117 | struct nbd_reply rep; |
217 | struct nbd_reply rep; |
118 | STRLEN len; |
218 | STRLEN len; |
119 | char *h = SvPV (handle, len); |
219 | char *h = SvPV (handle, len); |