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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 | |
|
|
25 | struct rstate { |
|
|
26 | struct nbd_request req; |
|
|
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 |
26 | |
32 | |
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|
33 | PROTOTYPES: DISABLE |
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|
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); |
31 | |
39 | |
32 | void |
40 | void |
33 | _doit (int dev, int doexit = 0) |
41 | _doit (int dev, int server = 0) |
34 | CODE: |
42 | CODE: |
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43 | if (server) |
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44 | for (server = 0; server < 4095; server++) |
|
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45 | if (server != dev) |
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46 | close (server); |
|
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47 | |
35 | ioctl (dev, NBD_DO_IT); |
48 | ioctl (dev, NBD_DO_IT); |
36 | if (doexit) |
49 | |
|
|
50 | if (server) |
37 | _exit (0); |
51 | _exit (0); |
38 | |
52 | |
39 | void |
53 | void |
40 | _disconnect (int dev) |
54 | _disconnect (int dev) |
41 | CODE: |
55 | CODE: |
… | |
… | |
57 | ioctl (dev, NBD_SET_BLKSIZE, blocksize); |
71 | ioctl (dev, NBD_SET_BLKSIZE, blocksize); |
58 | |
72 | |
59 | void |
73 | void |
60 | _set_size (int dev, unsigned long size) |
74 | _set_size (int dev, unsigned long size) |
61 | CODE: |
75 | CODE: |
62 | ioctl (dev, NBD_SET_BLKSIZE, size); |
76 | ioctl (dev, NBD_SET_SIZE, size); |
63 | |
77 | |
64 | void |
78 | void |
65 | _set_size_blocks (int dev, unsigned long nblocks) |
79 | _set_size_blocks (int dev, unsigned long nblocks) |
66 | CODE: |
80 | CODE: |
67 | ioctl (dev, NBD_SET_SIZE_BLOCKS, nblocks); |
81 | ioctl (dev, NBD_SET_SIZE_BLOCKS, nblocks); |
68 | |
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 | |
69 | MODULE = Linux::NBD PACKAGE = Linux::NBD::Server |
93 | MODULE = Linux::NBD PACKAGE = Linux::NBD::Server |
70 | |
94 | |
71 | void |
95 | void |
72 | _one_request (SV *obj, int fd) |
96 | _one_request (SV *obj, int fd) |
73 | CODE: |
97 | CODE: |
74 | struct nbd_request req; |
98 | { |
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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); |
75 | |
104 | |
76 | if (read (fd, &req, sizeof (req)) == sizeof (req)) |
105 | if (!mg) |
77 | { |
106 | { |
|
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107 | mg = sv_magicext (SvRV (obj), 0, PERL_MAGIC_ext, 0, 0, 0); |
|
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108 | mg->mg_len = sizeof (struct rstate); |
|
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109 | New (0, mg->mg_ptr, mg->mg_len, char); |
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110 | |
|
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111 | ((struct rstate *)mg->mg_ptr)->req_read = 0; /* initialise the state machine */ |
|
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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 | if (s->req_read < sizeof (struct nbd_request)) |
|
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130 | XSRETURN_NO; |
|
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131 | } |
|
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132 | |
|
|
133 | /* now we have a full request, so check for data */ |
78 | if (req.magic == htonl (NBD_REQUEST_MAGIC)) |
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 | |
|
|
140 | switch (ntohl (s->req.type)) |
79 | { |
141 | { |
80 | if (req.type < 2) |
142 | case NBD_CMD_WRITE: |
|
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143 | if (!mg->mg_obj) |
81 | { |
144 | { |
82 | u64 from = ntohll (req.from); |
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 | } |
83 | |
150 | |
84 | PUSHMARK (SP); |
151 | if (s->data_read < len) |
85 | EXTEND (SP, 3); |
152 | { |
86 | PUSHs (obj); |
153 | int res = read (fd, s->data_read + SvPVX (mg->mg_obj), len - s->data_read); |
87 | PUSHs (sv_2mortal (newSVpvn (req.handle, sizeof (req.handle)))); |
|
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88 | PUSHs (sv_2mortal (sizeof (UV) < 8 && from > (0xffffffffUL) |
|
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89 | ? newSVnv (from) |
|
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90 | : newSVuv (from))); |
|
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91 | PUSHs (sv_2mortal (newSVuv (ntohl (req.len)))); |
|
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92 | PUTBACK; |
|
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93 | call_method (req.type ? "req_write" : "req_read", G_DISCARD); |
|
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94 | SPAGAIN; |
|
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95 | |
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 | |
|
|
162 | if (s->data_read < len) |
96 | XSRETURN_NO; |
163 | XSRETURN_NO; |
97 | } |
164 | } |
|
|
165 | |
|
|
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 |
|
|
175 | ? newSVnv (from) |
|
|
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)); |
|
|
181 | mg->mg_obj = 0; |
|
|
182 | method = "req_write"; |
98 | } |
183 | } |
|
|
184 | else |
|
|
185 | { |
|
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186 | PUSHs (sv_2mortal (newSVuv (len))); |
|
|
187 | method = "req_read"; |
|
|
188 | } |
|
|
189 | |
|
|
190 | break; |
|
|
191 | |
|
|
192 | case NBD_CMD_DISC: |
|
|
193 | s->req_read = 0; |
|
|
194 | |
|
|
195 | method = "req_disc"; |
|
|
196 | |
|
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197 | PUSHMARK (SP); |
|
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198 | XPUSHs (obj); |
|
|
199 | |
|
|
200 | break; |
|
|
201 | |
|
|
202 | default: |
|
|
203 | croak ("Linux::NBD::Server received unsupported request type %d.\n", ntohl (s->req.type)); |
99 | } |
204 | } |
100 | |
205 | |
|
|
206 | PUTBACK; |
|
|
207 | call_method (method, G_DISCARD); |
|
|
208 | SPAGAIN; |
|
|
209 | |
101 | XSRETURN_YES; |
210 | XSRETURN_YES; |
|
|
211 | } |
102 | |
212 | |
103 | SV * |
213 | SV * |
104 | _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) |
105 | CODE: |
215 | CODE: |
|
|
216 | { |
106 | struct nbd_reply rep; |
217 | struct nbd_reply rep; |
107 | STRLEN len; |
218 | STRLEN len; |
108 | char *h = SvPV (handle, len); |
219 | char *h = SvPV (handle, len); |
109 | |
220 | |
110 | if (len != sizeof (rep.handle)) |
221 | if (len != sizeof (rep.handle)) |
… | |
… | |
116 | |
227 | |
117 | RETVAL = newSVpvn ((char *)&rep, sizeof (rep)); |
228 | RETVAL = newSVpvn ((char *)&rep, sizeof (rep)); |
118 | |
229 | |
119 | if (data && !error) |
230 | if (data && !error) |
120 | sv_catsv (RETVAL, data); |
231 | sv_catsv (RETVAL, data); |
121 | |
232 | } |
122 | OUTPUT: |
233 | OUTPUT: |
123 | RETVAL |
234 | RETVAL |
124 | |
235 | |