root / snf-pithos-backend / pithos / backends / lib / hashfiler / archipelagomapper.py @ 32293ec0
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1 | 32293ec0 | Chrysostomos Nanakos | # Copyright 2013 GRNET S.A. All rights reserved.
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2 | 32293ec0 | Chrysostomos Nanakos | #
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3 | 32293ec0 | Chrysostomos Nanakos | # Redistribution and use in source and binary forms, with or
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4 | 32293ec0 | Chrysostomos Nanakos | # without modification, are permitted provided that the following
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5 | 32293ec0 | Chrysostomos Nanakos | # conditions are met:
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6 | 32293ec0 | Chrysostomos Nanakos | #
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7 | 32293ec0 | Chrysostomos Nanakos | # 1. Redistributions of source code must retain the above
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8 | 32293ec0 | Chrysostomos Nanakos | # copyright notice, this list of conditions and the following
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9 | 32293ec0 | Chrysostomos Nanakos | # disclaimer.
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10 | 32293ec0 | Chrysostomos Nanakos | #
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11 | 32293ec0 | Chrysostomos Nanakos | # 2. Redistributions in binary form must reproduce the above
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12 | 32293ec0 | Chrysostomos Nanakos | # copyright notice, this list of conditions and the following
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13 | 32293ec0 | Chrysostomos Nanakos | # disclaimer in the documentation and/or other materials
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14 | 32293ec0 | Chrysostomos Nanakos | # provided with the distribution.
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15 | 32293ec0 | Chrysostomos Nanakos | #
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16 | 32293ec0 | Chrysostomos Nanakos | # THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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17 | 32293ec0 | Chrysostomos Nanakos | # OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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18 | 32293ec0 | Chrysostomos Nanakos | # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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19 | 32293ec0 | Chrysostomos Nanakos | # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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20 | 32293ec0 | Chrysostomos Nanakos | # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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21 | 32293ec0 | Chrysostomos Nanakos | # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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22 | 32293ec0 | Chrysostomos Nanakos | # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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23 | 32293ec0 | Chrysostomos Nanakos | # USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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24 | 32293ec0 | Chrysostomos Nanakos | # AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 | 32293ec0 | Chrysostomos Nanakos | # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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26 | 32293ec0 | Chrysostomos Nanakos | # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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27 | 32293ec0 | Chrysostomos Nanakos | # POSSIBILITY OF SUCH DAMAGE.
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28 | 32293ec0 | Chrysostomos Nanakos | #
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29 | 32293ec0 | Chrysostomos Nanakos | # The views and conclusions contained in the software and
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30 | 32293ec0 | Chrysostomos Nanakos | # documentation are those of the authors and should not be
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31 | 32293ec0 | Chrysostomos Nanakos | # interpreted as representing official policies, either expressed
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32 | 32293ec0 | Chrysostomos Nanakos | # or implied, of GRNET S.A.
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33 | 32293ec0 | Chrysostomos Nanakos | |
34 | 32293ec0 | Chrysostomos Nanakos | from binascii import hexlify |
35 | 32293ec0 | Chrysostomos Nanakos | import os, re |
36 | 32293ec0 | Chrysostomos Nanakos | import ctypes |
37 | 32293ec0 | Chrysostomos Nanakos | |
38 | 32293ec0 | Chrysostomos Nanakos | from context_archipelago import ArchipelagoObject |
39 | 32293ec0 | Chrysostomos Nanakos | from archipelago.common import ( |
40 | 32293ec0 | Chrysostomos Nanakos | Request, |
41 | 32293ec0 | Chrysostomos Nanakos | xseg_reply_info, |
42 | 32293ec0 | Chrysostomos Nanakos | xseg_reply_map, |
43 | 32293ec0 | Chrysostomos Nanakos | xseg_reply_map_scatterlist, |
44 | 32293ec0 | Chrysostomos Nanakos | string_at, |
45 | 32293ec0 | Chrysostomos Nanakos | ) |
46 | 32293ec0 | Chrysostomos Nanakos | |
47 | 32293ec0 | Chrysostomos Nanakos | from pithos.workers import ( |
48 | 32293ec0 | Chrysostomos Nanakos | glue, |
49 | 32293ec0 | Chrysostomos Nanakos | monkey, |
50 | 32293ec0 | Chrysostomos Nanakos | ) |
51 | 32293ec0 | Chrysostomos Nanakos | |
52 | 32293ec0 | Chrysostomos Nanakos | monkey.patch_Request() |
53 | 32293ec0 | Chrysostomos Nanakos | |
54 | 32293ec0 | Chrysostomos Nanakos | from pithos.api.settings import BACKEND_ARCHIPELAGO_CONF |
55 | 32293ec0 | Chrysostomos Nanakos | |
56 | 32293ec0 | Chrysostomos Nanakos | |
57 | 32293ec0 | Chrysostomos Nanakos | class ArchipelagoMapper(object): |
58 | 32293ec0 | Chrysostomos Nanakos | """Mapper.
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59 | 32293ec0 | Chrysostomos Nanakos | Required constructor parameters: namelen.
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60 | 32293ec0 | Chrysostomos Nanakos | """
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61 | 32293ec0 | Chrysostomos Nanakos | |
62 | 32293ec0 | Chrysostomos Nanakos | namelen = None
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63 | 32293ec0 | Chrysostomos Nanakos | |
64 | 32293ec0 | Chrysostomos Nanakos | def __init__(self, **params): |
65 | 32293ec0 | Chrysostomos Nanakos | self.params = params
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66 | 32293ec0 | Chrysostomos Nanakos | self.namelen = params['namelen'] |
67 | 32293ec0 | Chrysostomos Nanakos | ioctx_pool = glue.WorkerGlue().ioctx_pool |
68 | 32293ec0 | Chrysostomos Nanakos | cfg = {} |
69 | 32293ec0 | Chrysostomos Nanakos | bcfg = open(BACKEND_ARCHIPELAGO_CONF).read()
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70 | 32293ec0 | Chrysostomos Nanakos | cfg['blockerm'] = re.search('\'blockerm_port\'\s*:\s*\d+', |
71 | 32293ec0 | Chrysostomos Nanakos | bcfg).group(0).split(':')[1] |
72 | 32293ec0 | Chrysostomos Nanakos | cfg['mapperd'] = re.search('\'mapper_port\'\s*:\s*\d+', |
73 | 32293ec0 | Chrysostomos Nanakos | bcfg).group(0).split(':')[1] |
74 | 32293ec0 | Chrysostomos Nanakos | self.ioctx_pool = ioctx_pool
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75 | 32293ec0 | Chrysostomos Nanakos | self.dst_port = int(cfg['blockerm']) |
76 | 32293ec0 | Chrysostomos Nanakos | self.mapperd_port = int(cfg['mapperd']) |
77 | 32293ec0 | Chrysostomos Nanakos | |
78 | 32293ec0 | Chrysostomos Nanakos | def _get_rear_map(self, maphash, create=0): |
79 | 32293ec0 | Chrysostomos Nanakos | name = hexlify(maphash) |
80 | 32293ec0 | Chrysostomos Nanakos | return ArchipelagoObject(name, self.ioctx_pool, self.dst_port, create) |
81 | 32293ec0 | Chrysostomos Nanakos | |
82 | 32293ec0 | Chrysostomos Nanakos | def _check_rear_map(self, maphash): |
83 | 32293ec0 | Chrysostomos Nanakos | name = hexlify(maphash) |
84 | 32293ec0 | Chrysostomos Nanakos | ioctx = self.ioctx_pool.pool_get()
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85 | 32293ec0 | Chrysostomos Nanakos | req = Request.get_info_request(ioctx, self.dst_port, name)
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86 | 32293ec0 | Chrysostomos Nanakos | req.submit() |
87 | 32293ec0 | Chrysostomos Nanakos | req.wait() |
88 | 32293ec0 | Chrysostomos Nanakos | ret = req.success() |
89 | 32293ec0 | Chrysostomos Nanakos | req.put() |
90 | 32293ec0 | Chrysostomos Nanakos | self.ioctx_pool.pool_put(ioctx)
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91 | 32293ec0 | Chrysostomos Nanakos | if ret:
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92 | 32293ec0 | Chrysostomos Nanakos | return True |
93 | 32293ec0 | Chrysostomos Nanakos | else:
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94 | 32293ec0 | Chrysostomos Nanakos | return False |
95 | 32293ec0 | Chrysostomos Nanakos | |
96 | 32293ec0 | Chrysostomos Nanakos | def map_retr(self, maphash, blkoff=0, nr=100000000000000): |
97 | 32293ec0 | Chrysostomos Nanakos | """Return as a list, part of the hashes map of an object
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98 | 32293ec0 | Chrysostomos Nanakos | at the given block offset.
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99 | 32293ec0 | Chrysostomos Nanakos | By default, return the whole hashes map.
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100 | 32293ec0 | Chrysostomos Nanakos | """
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101 | 32293ec0 | Chrysostomos Nanakos | namelen = self.namelen
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102 | 32293ec0 | Chrysostomos Nanakos | hashes = () |
103 | 32293ec0 | Chrysostomos Nanakos | ioctx = self.ioctx_pool.pool_get()
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104 | 32293ec0 | Chrysostomos Nanakos | req = Request.get_info_request(ioctx, self.dst_port,
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105 | 32293ec0 | Chrysostomos Nanakos | hexlify(maphash)) |
106 | 32293ec0 | Chrysostomos Nanakos | req.submit() |
107 | 32293ec0 | Chrysostomos Nanakos | req.wait() |
108 | 32293ec0 | Chrysostomos Nanakos | ret = req.success() |
109 | 32293ec0 | Chrysostomos Nanakos | if ret:
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110 | 32293ec0 | Chrysostomos Nanakos | info = req.get_data(_type=xseg_reply_info) |
111 | 32293ec0 | Chrysostomos Nanakos | size = int(info.contents.size)
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112 | 32293ec0 | Chrysostomos Nanakos | req.put() |
113 | 32293ec0 | Chrysostomos Nanakos | else:
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114 | 32293ec0 | Chrysostomos Nanakos | req.put() |
115 | 32293ec0 | Chrysostomos Nanakos | self.ioctx_pool.pool_put(ioctx)
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116 | 32293ec0 | Chrysostomos Nanakos | raise RuntimeError("Hashmap '%s' doesn't exists" % hexlify(maphash)) |
117 | 32293ec0 | Chrysostomos Nanakos | req = Request.get_read_request(ioctx, self.dst_port,
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118 | 32293ec0 | Chrysostomos Nanakos | hexlify(maphash), size = size) |
119 | 32293ec0 | Chrysostomos Nanakos | req.submit() |
120 | 32293ec0 | Chrysostomos Nanakos | req.wait() |
121 | 32293ec0 | Chrysostomos Nanakos | ret = req.success() |
122 | 32293ec0 | Chrysostomos Nanakos | if ret:
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123 | 32293ec0 | Chrysostomos Nanakos | data = string_at(req.get_data(),size) |
124 | 32293ec0 | Chrysostomos Nanakos | req.put() |
125 | 32293ec0 | Chrysostomos Nanakos | self.ioctx_pool.pool_put(ioctx)
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126 | 32293ec0 | Chrysostomos Nanakos | for idx in xrange(0,len(data),namelen): |
127 | 32293ec0 | Chrysostomos Nanakos | hashes = hashes + (data[idx:idx+namelen],) |
128 | 32293ec0 | Chrysostomos Nanakos | hashes = list(hashes)
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129 | 32293ec0 | Chrysostomos Nanakos | else:
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130 | 32293ec0 | Chrysostomos Nanakos | req.put() |
131 | 32293ec0 | Chrysostomos Nanakos | self.ioctx_pool.pool_put(ioctx)
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132 | 32293ec0 | Chrysostomos Nanakos | raise RuntimeError("Hashmap '%s' doesn't exists" % hexlify(maphash)) |
133 | 32293ec0 | Chrysostomos Nanakos | return hashes
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134 | 32293ec0 | Chrysostomos Nanakos | |
135 | 32293ec0 | Chrysostomos Nanakos | def map_retr_archipelago(self, maphash, size): |
136 | 32293ec0 | Chrysostomos Nanakos | """Retrieve Archipelago mapfile"""
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137 | 32293ec0 | Chrysostomos Nanakos | ioctx = self.ioctx_pool.pool_get()
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138 | 32293ec0 | Chrysostomos Nanakos | maphash = maphash.split("archip:")[1] |
139 | 32293ec0 | Chrysostomos Nanakos | req = Request.get_mapr_request(ioctx, self.mapperd_port, maphash,
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140 | 32293ec0 | Chrysostomos Nanakos | offset=0, size=size)
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141 | 32293ec0 | Chrysostomos Nanakos | req.submit() |
142 | 32293ec0 | Chrysostomos Nanakos | req.wait() |
143 | 32293ec0 | Chrysostomos Nanakos | ret = req.success() |
144 | 32293ec0 | Chrysostomos Nanakos | if ret:
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145 | 32293ec0 | Chrysostomos Nanakos | data = req.get_data(xseg_reply_map) |
146 | 32293ec0 | Chrysostomos Nanakos | Segsarray = xseg_reply_map_scatterlist * data.contents.cnt |
147 | 32293ec0 | Chrysostomos Nanakos | segs = Segsarray.from_address(ctypes.addressof(data.contents.segs)) |
148 | 32293ec0 | Chrysostomos Nanakos | req.put() |
149 | 32293ec0 | Chrysostomos Nanakos | else:
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150 | 32293ec0 | Chrysostomos Nanakos | req.put() |
151 | 32293ec0 | Chrysostomos Nanakos | self.ioctx_pool.pool_put(ioctx)
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152 | 32293ec0 | Chrysostomos Nanakos | raise Exception("Could not retrieve Archipelago mapfile.") |
153 | 32293ec0 | Chrysostomos Nanakos | self.ioctx_pool.pool_put(ioctx)
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154 | 32293ec0 | Chrysostomos Nanakos | return [string_at(segs[idx].target, segs[idx].targetlen) for idx in xrange(len(segs))] |
155 | 32293ec0 | Chrysostomos Nanakos | |
156 | 32293ec0 | Chrysostomos Nanakos | def map_stor(self, maphash, hashes=(), blkoff=0, create=1): |
157 | 32293ec0 | Chrysostomos Nanakos | """Store hashes in the given hashes map."""
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158 | 32293ec0 | Chrysostomos Nanakos | namelen = self.namelen
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159 | 32293ec0 | Chrysostomos Nanakos | if self._check_rear_map(maphash): |
160 | 32293ec0 | Chrysostomos Nanakos | return
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161 | 32293ec0 | Chrysostomos Nanakos | with self._get_rear_map(maphash, 1) as rmap: |
162 | 32293ec0 | Chrysostomos Nanakos | rmap.sync_write_chunks(namelen, blkoff, hashes, None) |