Mercurial > dovecot > core-2.2
annotate src/lib-storage/index/dbox-single/sdbox-sync.c @ 11820:76ee1fa16012
Renamed "dbox" to "sdbox". Keep also dbox as an alias for it.
author | Timo Sirainen <tss@iki.fi> |
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date | Wed, 14 Jul 2010 17:10:30 +0100 |
parents | 8ec35eb6d7b3 |
children | 28eaaa23f2c6 |
rev | line source |
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Updated copyright notices to include year 2010.
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1 /* Copyright (c) 2007-2010 Dovecot authors, see the included COPYING file */ |
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2 |
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3 #include "lib.h" |
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4 #include "sdbox-storage.h" |
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5 #include "sdbox-file.h" |
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6 #include "sdbox-sync.h" |
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7 |
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8 #define SDBOX_REBUILD_COUNT 3 |
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9 |
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10 static void |
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11 dbox_sync_file_move_if_needed(struct dbox_file *file, |
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12 enum sdbox_sync_entry_type type) |
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13 { |
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14 bool move_to_alt = type == SDBOX_SYNC_ENTRY_TYPE_MOVE_TO_ALT; |
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15 bool deleted; |
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16 |
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17 if (move_to_alt != dbox_file_is_in_alt(file)) { |
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18 /* move the file. if it fails, nothing broke so |
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19 don't worry about it. */ |
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20 if (dbox_file_open(file, &deleted) > 0 && !deleted) |
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21 (void)sdbox_file_move(file, move_to_alt); |
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22 } |
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23 } |
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24 |
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25 static void dbox_sync_file_expunge(struct sdbox_sync_context *ctx, |
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26 struct dbox_file *file, uint32_t seq) |
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27 { |
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28 struct sdbox_file *sfile = (struct sdbox_file *)file; |
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29 struct mailbox *box = &ctx->mbox->box; |
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30 |
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31 if (mail_index_transaction_is_expunged(ctx->trans, seq)) { |
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32 /* already expunged within this transaction */ |
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33 return; |
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34 } |
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35 if (dbox_file_unlink(file) < 0) { |
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36 /* some non-ENOENT error trying to unlink the file */ |
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37 return; |
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38 } |
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39 |
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40 /* file was either unlinked by us or someone else */ |
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41 mail_index_expunge(ctx->trans, seq); |
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42 if (box->v.sync_notify != NULL) |
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43 box->v.sync_notify(box, sfile->uid, MAILBOX_SYNC_TYPE_EXPUNGE); |
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44 } |
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45 |
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46 static void sdbox_sync_file(struct sdbox_sync_context *ctx, |
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47 uint32_t seq, uint32_t uid, |
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48 enum sdbox_sync_entry_type type) |
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49 { |
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50 struct dbox_file *file; |
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51 |
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52 file = sdbox_file_init(ctx->mbox, uid); |
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53 switch (type) { |
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54 case SDBOX_SYNC_ENTRY_TYPE_EXPUNGE: |
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55 dbox_sync_file_expunge(ctx, file, seq); |
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56 break; |
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57 case SDBOX_SYNC_ENTRY_TYPE_MOVE_FROM_ALT: |
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58 case SDBOX_SYNC_ENTRY_TYPE_MOVE_TO_ALT: |
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59 dbox_sync_file_move_if_needed(file, type); |
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60 break; |
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61 } |
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62 dbox_file_unref(&file); |
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63 } |
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64 |
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65 static void sdbox_sync_add(struct sdbox_sync_context *ctx, |
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66 const struct mail_index_sync_rec *sync_rec) |
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67 { |
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68 uint32_t uid; |
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69 enum sdbox_sync_entry_type type; |
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70 uint32_t seq, seq1, seq2; |
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71 |
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72 if (sync_rec->type == MAIL_INDEX_SYNC_TYPE_EXPUNGE) { |
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73 /* we're interested */ |
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74 type = SDBOX_SYNC_ENTRY_TYPE_EXPUNGE; |
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75 } else if (sync_rec->type == MAIL_INDEX_SYNC_TYPE_FLAGS) { |
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76 /* we care only about alt flag changes */ |
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77 if ((sync_rec->add_flags & DBOX_INDEX_FLAG_ALT) != 0) |
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78 type = SDBOX_SYNC_ENTRY_TYPE_MOVE_TO_ALT; |
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79 else if ((sync_rec->remove_flags & DBOX_INDEX_FLAG_ALT) != 0) |
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80 type = SDBOX_SYNC_ENTRY_TYPE_MOVE_FROM_ALT; |
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81 else |
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82 return; |
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83 } else { |
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84 /* not interested */ |
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85 return; |
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86 } |
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87 |
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88 if (!mail_index_lookup_seq_range(ctx->sync_view, |
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89 sync_rec->uid1, sync_rec->uid2, |
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90 &seq1, &seq2)) { |
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91 /* already expunged everything. nothing to do. */ |
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92 return; |
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93 } |
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94 |
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95 for (seq = seq1; seq <= seq2; seq++) { |
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96 mail_index_lookup_uid(ctx->sync_view, seq, &uid); |
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97 sdbox_sync_file(ctx, seq, uid, type); |
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98 } |
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99 } |
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100 |
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101 static int sdbox_sync_index(struct sdbox_sync_context *ctx) |
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102 { |
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103 struct mailbox *box = &ctx->mbox->box; |
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104 const struct mail_index_header *hdr; |
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105 struct mail_index_sync_rec sync_rec; |
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106 uint32_t seq1, seq2; |
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107 |
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108 hdr = mail_index_get_header(ctx->sync_view); |
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109 if (hdr->uid_validity == 0) { |
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110 /* newly created index file */ |
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111 return 0; |
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112 } |
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113 |
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114 /* mark the newly seen messages as recent */ |
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115 if (mail_index_lookup_seq_range(ctx->sync_view, hdr->first_recent_uid, |
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116 hdr->next_uid, &seq1, &seq2)) |
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117 index_mailbox_set_recent_seq(box, ctx->sync_view, seq1, seq2); |
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118 |
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119 while (mail_index_sync_next(ctx->index_sync_ctx, &sync_rec)) |
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120 sdbox_sync_add(ctx, &sync_rec); |
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121 |
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122 if (box->v.sync_notify != NULL) |
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123 box->v.sync_notify(box, 0, 0); |
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124 return 1; |
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125 } |
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126 |
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127 static int |
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128 sdbox_refresh_header(struct sdbox_mailbox *mbox, bool retry, bool log_error) |
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129 { |
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130 struct mail_index_view *view; |
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131 struct sdbox_index_header hdr; |
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132 int ret; |
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133 |
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134 view = mail_index_view_open(mbox->box.index); |
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135 ret = sdbox_read_header(mbox, &hdr, log_error); |
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136 mail_index_view_close(&view); |
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137 |
11025 | 138 if (ret < 0 && retry) { |
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139 (void)mail_index_refresh(mbox->box.index); |
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140 return sdbox_refresh_header(mbox, FALSE, log_error); |
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141 } |
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142 return ret; |
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143 } |
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144 |
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145 int sdbox_sync_begin(struct sdbox_mailbox *mbox, enum sdbox_sync_flags flags, |
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146 struct sdbox_sync_context **ctx_r) |
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147 { |
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148 struct mail_storage *storage = mbox->box.storage; |
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149 struct sdbox_sync_context *ctx; |
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150 enum mail_index_sync_flags sync_flags; |
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151 unsigned int i; |
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152 int ret; |
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153 bool rebuild, force_rebuild; |
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154 |
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155 force_rebuild = (flags & SDBOX_SYNC_FLAG_FORCE_REBUILD) != 0; |
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156 rebuild = force_rebuild || |
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157 mbox->corrupted_rebuild_count != 0 || |
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158 sdbox_refresh_header(mbox, TRUE, FALSE) < 0; |
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159 |
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160 ctx = i_new(struct sdbox_sync_context, 1); |
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161 ctx->mbox = mbox; |
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162 ctx->flags = flags; |
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163 |
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164 sync_flags = index_storage_get_sync_flags(&mbox->box); |
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165 if (!rebuild && (flags & SDBOX_SYNC_FLAG_FORCE) == 0) |
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166 sync_flags |= MAIL_INDEX_SYNC_FLAG_REQUIRE_CHANGES; |
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167 if ((flags & SDBOX_SYNC_FLAG_FSYNC) != 0) |
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168 sync_flags |= MAIL_INDEX_SYNC_FLAG_FSYNC; |
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169 /* don't write unnecessary dirty flag updates */ |
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170 sync_flags |= MAIL_INDEX_SYNC_FLAG_AVOID_FLAG_UPDATES; |
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171 |
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172 for (i = 0;; i++) { |
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173 ret = mail_index_sync_begin(mbox->box.index, |
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174 &ctx->index_sync_ctx, |
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175 &ctx->sync_view, &ctx->trans, |
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176 sync_flags); |
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177 if (ret <= 0) { |
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178 if (ret < 0) |
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179 mail_storage_set_index_error(&mbox->box); |
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180 i_free(ctx); |
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181 *ctx_r = NULL; |
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182 return ret; |
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183 } |
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184 |
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185 if (rebuild) |
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186 ret = 0; |
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187 else { |
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188 if ((ret = sdbox_sync_index(ctx)) > 0) |
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189 break; |
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190 } |
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191 |
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192 /* failure. keep the index locked while we're doing a |
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193 rebuild. */ |
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194 if (ret == 0) { |
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195 if (i >= SDBOX_REBUILD_COUNT) { |
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196 mail_storage_set_critical(storage, |
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197 "sdbox %s: Index keeps breaking", |
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198 ctx->mbox->box.path); |
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199 ret = -1; |
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200 } else { |
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201 /* do a full resync and try again. */ |
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202 i_warning("sdbox %s: Rebuilding index", |
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203 ctx->mbox->box.path); |
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204 rebuild = FALSE; |
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205 ret = sdbox_sync_index_rebuild(mbox, |
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206 force_rebuild); |
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207 } |
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208 } |
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209 mail_index_sync_rollback(&ctx->index_sync_ctx); |
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210 if (ret < 0) { |
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211 i_free(ctx); |
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212 return -1; |
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213 } |
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214 } |
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215 |
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216 *ctx_r = ctx; |
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217 return 0; |
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218 } |
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219 |
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220 int sdbox_sync_finish(struct sdbox_sync_context **_ctx, bool success) |
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221 { |
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222 struct sdbox_sync_context *ctx = *_ctx; |
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223 int ret = success ? 0 : -1; |
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224 |
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225 *_ctx = NULL; |
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226 |
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227 if (success) { |
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228 if (mail_index_sync_commit(&ctx->index_sync_ctx) < 0) { |
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229 mail_storage_set_index_error(&ctx->mbox->box); |
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230 ret = -1; |
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231 } |
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232 } else { |
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233 mail_index_sync_rollback(&ctx->index_sync_ctx); |
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234 } |
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235 |
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236 i_free(ctx); |
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237 return ret; |
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238 } |
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239 |
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240 int sdbox_sync(struct sdbox_mailbox *mbox, enum sdbox_sync_flags flags) |
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241 { |
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242 struct sdbox_sync_context *sync_ctx; |
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243 |
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244 if (sdbox_sync_begin(mbox, flags, &sync_ctx) < 0) |
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245 return -1; |
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246 |
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247 if (sync_ctx == NULL) |
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248 return 0; |
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249 return sdbox_sync_finish(&sync_ctx, TRUE); |
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250 } |
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251 |
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252 struct mailbox_sync_context * |
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253 sdbox_storage_sync_init(struct mailbox *box, enum mailbox_sync_flags flags) |
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254 { |
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255 struct sdbox_mailbox *mbox = (struct sdbox_mailbox *)box; |
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256 enum sdbox_sync_flags sdbox_sync_flags = 0; |
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257 int ret = 0; |
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258 |
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259 if (!box->opened) { |
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260 if (mailbox_open(box) < 0) |
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261 ret = -1; |
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262 } |
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263 |
11025 | 264 if (ret == 0 && index_mailbox_want_full_sync(&mbox->box, flags)) { |
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265 if ((flags & MAILBOX_SYNC_FLAG_FORCE_RESYNC) != 0) |
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266 sdbox_sync_flags |= SDBOX_SYNC_FLAG_FORCE_REBUILD; |
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267 ret = sdbox_sync(mbox, sdbox_sync_flags); |
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268 } |
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269 |
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270 return index_mailbox_sync_init(box, flags, ret < 0); |
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271 } |