Mercurial > dovecot > core-2.2
annotate src/doveadm/dsync/dsync-brain.c @ 15355:b52f4852e5f8
If prefix="" namespace isn't defined, autocreate it as an unusable namespace.
This avoids having to handle mail_namespace_find() errors all over the
place. Instead now the mailbox accesses will simply fail.
author | Timo Sirainen <tss@iki.fi> |
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date | Mon, 29 Oct 2012 22:03:25 +0200 |
parents | 6c850258002f |
children | af3b86a16ac3 |
rev | line source |
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1 /* Copyright (c) 2012 Dovecot authors, see the included COPYING file */ |
9559 | 2 |
3 #include "lib.h" | |
4 #include "array.h" | |
5 #include "hash.h" | |
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6 #include "mail-namespace.h" |
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7 #include "dsync-mailbox-tree.h" |
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8 #include "dsync-ibc.h" |
9559 | 9 #include "dsync-brain-private.h" |
10 | |
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11 static void dsync_brain_run_io(void *context) |
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12 { |
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13 struct dsync_brain *brain = context; |
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14 bool changed, try_pending; |
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15 |
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16 if (dsync_ibc_has_failed(brain->ibc)) { |
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17 io_loop_stop(current_ioloop); |
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18 brain->failed = TRUE; |
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19 return; |
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20 } |
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21 |
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22 try_pending = TRUE; |
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23 do { |
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24 if (!dsync_brain_run(brain, &changed)) { |
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25 io_loop_stop(current_ioloop); |
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26 break; |
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27 } |
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28 if (changed) |
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29 try_pending = TRUE; |
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30 else if (try_pending) { |
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31 if (dsync_ibc_has_pending_data(brain->ibc)) |
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32 changed = TRUE; |
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33 try_pending = FALSE; |
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34 } |
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35 } while (changed); |
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36 } |
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37 |
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38 static struct dsync_brain * |
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39 dsync_brain_common_init(struct mail_user *user, struct dsync_ibc *ibc) |
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40 { |
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41 struct dsync_brain *brain; |
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42 pool_t pool; |
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43 |
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44 pool = pool_alloconly_create("dsync brain", 10240); |
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45 brain = p_new(pool, struct dsync_brain, 1); |
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46 brain->pool = pool; |
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47 brain->user = user; |
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48 brain->ibc = ibc; |
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49 brain->sync_type = DSYNC_BRAIN_SYNC_TYPE_UNKNOWN; |
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50 hash_table_create(&brain->mailbox_states, pool, 0, |
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51 guid_128_hash, guid_128_cmp); |
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52 p_array_init(&brain->remote_mailbox_states, pool, 64); |
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53 return brain; |
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54 } |
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56 static void |
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57 dsync_brain_set_flags(struct dsync_brain *brain, enum dsync_brain_flags flags) |
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58 { |
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59 brain->guid_requests = |
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60 (flags & DSYNC_BRAIN_FLAG_SEND_GUID_REQUESTS) != 0; |
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61 brain->mails_have_guids = |
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62 (flags & DSYNC_BRAIN_FLAG_MAILS_HAVE_GUIDS) != 0; |
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63 brain->backup_send = (flags & DSYNC_BRAIN_FLAG_BACKUP_SEND) != 0; |
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64 brain->backup_recv = (flags & DSYNC_BRAIN_FLAG_BACKUP_RECV) != 0; |
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65 } |
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66 |
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67 struct dsync_brain * |
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68 dsync_brain_master_init(struct mail_user *user, struct dsync_ibc *ibc, |
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69 struct mail_namespace *sync_ns, |
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70 enum dsync_brain_sync_type sync_type, |
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71 enum dsync_brain_flags flags, |
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72 const char *state) |
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73 { |
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74 struct dsync_ibc_settings ibc_set; |
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75 struct dsync_brain *brain; |
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76 const char *error; |
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77 |
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78 i_assert(sync_type != DSYNC_BRAIN_SYNC_TYPE_UNKNOWN); |
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79 i_assert(sync_type != DSYNC_BRAIN_SYNC_TYPE_STATE || *state != '\0'); |
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80 |
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81 brain = dsync_brain_common_init(user, ibc); |
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82 brain->sync_type = sync_type; |
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83 if (sync_ns != NULL) |
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84 brain->sync_ns = sync_ns; |
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85 brain->master_brain = TRUE; |
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86 dsync_brain_set_flags(brain, flags); |
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87 |
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88 brain->state = DSYNC_STATE_SEND_MAILBOX_TREE; |
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89 if (sync_type == DSYNC_BRAIN_SYNC_TYPE_STATE) { |
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90 if (dsync_mailbox_states_import(brain->mailbox_states, |
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91 brain->pool, state, |
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92 &error) < 0) { |
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93 hash_table_clear(brain->mailbox_states, FALSE); |
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94 i_error("Saved sync state is invalid, " |
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95 "falling back to full sync: %s", error); |
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96 brain->sync_type = sync_type = |
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97 DSYNC_BRAIN_SYNC_TYPE_FULL; |
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98 } else { |
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99 brain->state = DSYNC_STATE_MASTER_SEND_LAST_COMMON; |
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100 } |
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101 } |
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102 dsync_brain_mailbox_trees_init(brain); |
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103 |
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104 memset(&ibc_set, 0, sizeof(ibc_set)); |
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105 ibc_set.sync_ns_prefix = sync_ns == NULL ? NULL : sync_ns->prefix; |
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106 ibc_set.sync_type = sync_type; |
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107 /* reverse the backup direction for the slave */ |
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108 ibc_set.brain_flags = flags & ~(DSYNC_BRAIN_FLAG_BACKUP_SEND | |
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109 DSYNC_BRAIN_FLAG_BACKUP_RECV); |
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110 if ((flags & DSYNC_BRAIN_FLAG_BACKUP_SEND) != 0) |
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111 ibc_set.brain_flags |= DSYNC_BRAIN_FLAG_BACKUP_RECV; |
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112 else if ((flags & DSYNC_BRAIN_FLAG_BACKUP_RECV) != 0) |
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113 ibc_set.brain_flags |= DSYNC_BRAIN_FLAG_BACKUP_SEND; |
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114 dsync_ibc_send_handshake(ibc, &ibc_set); |
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115 |
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116 dsync_ibc_set_io_callback(ibc, dsync_brain_run_io, brain); |
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117 return brain; |
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118 } |
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119 |
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120 struct dsync_brain * |
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121 dsync_brain_slave_init(struct mail_user *user, struct dsync_ibc *ibc) |
9559 | 122 { |
123 struct dsync_brain *brain; | |
124 | |
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125 brain = dsync_brain_common_init(user, ibc); |
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126 brain->state = DSYNC_STATE_SLAVE_RECV_HANDSHAKE; |
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127 |
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128 dsync_ibc_set_io_callback(ibc, dsync_brain_run_io, brain); |
9559 | 129 return brain; |
130 } | |
131 | |
132 int dsync_brain_deinit(struct dsync_brain **_brain) | |
133 { | |
134 struct dsync_brain *brain = *_brain; | |
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135 int ret; |
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136 |
9559 | 137 *_brain = NULL; |
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138 |
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139 if (dsync_ibc_has_failed(brain->ibc) || |
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140 brain->state != DSYNC_STATE_DONE) |
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141 brain->failed = TRUE; |
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142 |
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143 if (brain->box != NULL) |
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144 dsync_brain_sync_mailbox_deinit(brain); |
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145 if (brain->local_tree_iter != NULL) |
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146 dsync_mailbox_tree_iter_deinit(&brain->local_tree_iter); |
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147 if (brain->mailbox_states_iter != NULL) |
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148 hash_table_iterate_deinit(&brain->mailbox_states_iter); |
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149 hash_table_destroy(&brain->mailbox_states); |
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150 |
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151 ret = brain->failed ? -1 : 0; |
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152 pool_unref(&brain->pool); |
9559 | 153 return ret; |
154 } | |
155 | |
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156 static bool dsync_brain_slave_recv_handshake(struct dsync_brain *brain) |
9559 | 157 { |
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158 const struct dsync_ibc_settings *ibc_set; |
9559 | 159 |
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160 i_assert(!brain->master_brain); |
9559 | 161 |
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162 if (dsync_ibc_recv_handshake(brain->ibc, &ibc_set) == 0) |
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163 return FALSE; |
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164 |
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165 if (ibc_set->sync_ns_prefix != NULL) { |
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166 brain->sync_ns = mail_namespace_find(brain->user->namespaces, |
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167 ibc_set->sync_ns_prefix); |
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168 } |
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169 i_assert(brain->sync_type == DSYNC_BRAIN_SYNC_TYPE_UNKNOWN); |
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170 brain->sync_type = ibc_set->sync_type; |
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171 dsync_brain_set_flags(brain, ibc_set->brain_flags); |
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172 |
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173 dsync_brain_mailbox_trees_init(brain); |
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174 |
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175 if (brain->sync_type == DSYNC_BRAIN_SYNC_TYPE_STATE) |
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176 brain->state = DSYNC_STATE_SLAVE_RECV_LAST_COMMON; |
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177 else |
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178 brain->state = DSYNC_STATE_SEND_MAILBOX_TREE; |
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179 return TRUE; |
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180 } |
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181 |
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182 static void dsync_brain_master_send_last_common(struct dsync_brain *brain) |
9559 | 183 { |
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184 struct dsync_mailbox_state *state; |
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185 uint8_t *guid; |
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186 enum dsync_ibc_send_ret ret = DSYNC_IBC_SEND_RET_OK; |
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187 |
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188 i_assert(brain->master_brain); |
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189 |
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190 if (brain->mailbox_states_iter == NULL) { |
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191 brain->mailbox_states_iter = |
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192 hash_table_iterate_init(brain->mailbox_states); |
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193 } |
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194 |
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195 for (;;) { |
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196 if (ret == DSYNC_IBC_SEND_RET_FULL) |
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197 return; |
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198 if (!hash_table_iterate(brain->mailbox_states_iter, |
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199 brain->mailbox_states, &guid, &state)) |
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200 break; |
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201 ret = dsync_ibc_send_mailbox_state(brain->ibc, state); |
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202 } |
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203 hash_table_iterate_deinit(&brain->mailbox_states_iter); |
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204 |
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205 dsync_ibc_send_end_of_list(brain->ibc); |
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206 brain->state = DSYNC_STATE_SEND_MAILBOX_TREE; |
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207 } |
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208 |
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209 static void dsync_mailbox_state_add(struct dsync_brain *brain, |
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210 const struct dsync_mailbox_state *state) |
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211 { |
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212 struct dsync_mailbox_state *dupstate; |
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213 uint8_t *guid_p; |
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214 |
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215 dupstate = p_new(brain->pool, struct dsync_mailbox_state, 1); |
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216 *dupstate = *state; |
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217 guid_p = dupstate->mailbox_guid; |
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218 hash_table_insert(brain->mailbox_states, guid_p, dupstate); |
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219 } |
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220 |
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221 static bool dsync_brain_slave_recv_last_common(struct dsync_brain *brain) |
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222 { |
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223 struct dsync_mailbox_state state; |
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224 enum dsync_ibc_recv_ret ret; |
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225 bool changed = FALSE; |
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226 |
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227 i_assert(!brain->master_brain); |
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228 |
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229 while ((ret = dsync_ibc_recv_mailbox_state(brain->ibc, &state)) > 0) { |
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230 dsync_mailbox_state_add(brain, &state); |
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231 changed = TRUE; |
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232 } |
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233 if (ret == DSYNC_IBC_RECV_RET_FINISHED) { |
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234 brain->state = DSYNC_STATE_SEND_MAILBOX_TREE; |
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235 changed = TRUE; |
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236 } |
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237 return changed; |
10371 | 238 } |
239 | |
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240 static bool dsync_brain_run_real(struct dsync_brain *brain, bool *changed_r) |
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241 { |
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242 bool changed = FALSE, ret = TRUE; |
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243 |
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244 if (brain->failed) |
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245 return FALSE; |
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246 |
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247 switch (brain->state) { |
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248 case DSYNC_STATE_SLAVE_RECV_HANDSHAKE: |
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249 changed = dsync_brain_slave_recv_handshake(brain); |
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250 break; |
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251 case DSYNC_STATE_MASTER_SEND_LAST_COMMON: |
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252 dsync_brain_master_send_last_common(brain); |
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253 changed = TRUE; |
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254 break; |
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255 case DSYNC_STATE_SLAVE_RECV_LAST_COMMON: |
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256 changed = dsync_brain_slave_recv_last_common(brain); |
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257 break; |
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258 case DSYNC_STATE_SEND_MAILBOX_TREE: |
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259 dsync_brain_send_mailbox_tree(brain); |
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260 changed = TRUE; |
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261 break; |
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262 case DSYNC_STATE_RECV_MAILBOX_TREE: |
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263 changed = dsync_brain_recv_mailbox_tree(brain); |
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264 break; |
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265 case DSYNC_STATE_SEND_MAILBOX_TREE_DELETES: |
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266 dsync_brain_send_mailbox_tree_deletes(brain); |
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267 changed = TRUE; |
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268 break; |
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269 case DSYNC_STATE_RECV_MAILBOX_TREE_DELETES: |
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270 changed = dsync_brain_recv_mailbox_tree_deletes(brain); |
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271 break; |
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272 case DSYNC_STATE_MASTER_SEND_MAILBOX: |
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273 dsync_brain_master_send_mailbox(brain); |
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274 changed = TRUE; |
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275 break; |
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276 case DSYNC_STATE_SLAVE_RECV_MAILBOX: |
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277 changed = dsync_brain_slave_recv_mailbox(brain); |
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278 break; |
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279 case DSYNC_STATE_SYNC_MAILS: |
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280 changed = dsync_brain_sync_mails(brain); |
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281 break; |
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282 case DSYNC_STATE_DONE: |
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283 changed = TRUE; |
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284 ret = FALSE; |
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285 break; |
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286 } |
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287 |
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288 *changed_r = changed; |
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289 return brain->failed ? FALSE : ret; |
10371 | 290 } |
291 | |
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292 bool dsync_brain_run(struct dsync_brain *brain, bool *changed_r) |
9559 | 293 { |
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294 bool ret; |
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295 |
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296 *changed_r = FALSE; |
9559 | 297 |
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298 if (dsync_ibc_has_failed(brain->ibc)) { |
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299 brain->failed = TRUE; |
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300 return FALSE; |
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301 } |
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302 |
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303 T_BEGIN { |
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304 ret = dsync_brain_run_real(brain, changed_r); |
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305 } T_END; |
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306 if (!brain->failed) |
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307 dsync_ibc_flush(brain->ibc); |
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308 return ret; |
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309 } |
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310 |
15232
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311 void dsync_brain_get_state(struct dsync_brain *brain, string_t *output) |
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312 { |
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313 struct hash_iterate_context *iter; |
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314 struct dsync_mailbox_node *node; |
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315 const struct dsync_mailbox_state *new_state; |
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316 struct dsync_mailbox_state *state; |
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317 const uint8_t *guid_p; |
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318 uint8_t *guid; |
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319 |
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320 /* update mailbox states */ |
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321 array_foreach(&brain->remote_mailbox_states, new_state) { |
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322 guid_p = new_state->mailbox_guid; |
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323 state = hash_table_lookup(brain->mailbox_states, guid_p); |
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324 if (state != NULL) |
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325 *state = *new_state; |
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326 else |
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327 dsync_mailbox_state_add(brain, new_state); |
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328 } |
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329 |
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330 /* remove nonexistent mailboxes */ |
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331 iter = hash_table_iterate_init(brain->mailbox_states); |
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332 while (hash_table_iterate(iter, brain->mailbox_states, &guid, &state)) { |
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333 node = dsync_mailbox_tree_lookup_guid(brain->local_mailbox_tree, |
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334 guid); |
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335 if (node == NULL || |
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336 node->existence != DSYNC_MAILBOX_NODE_EXISTS) |
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337 hash_table_remove(brain->mailbox_states, guid); |
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338 } |
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339 hash_table_iterate_deinit(&iter); |
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340 |
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341 dsync_mailbox_states_export(brain->mailbox_states, output); |
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342 } |
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343 |
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344 bool dsync_brain_has_failed(struct dsync_brain *brain) |
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345 { |
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346 return brain->failed; |
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347 } |