Mercurial > dovecot > core-2.2

annotate src/lib-index/mail-transaction-log-private.h @ 9623:3da42dafa798 HEAD

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buffer_create_[const_]data() API change: Take buffer_t as parameter instead of allocating it.
author Timo Sirainen <tss@iki.fi>
date Mon, 13 Jul 2009 21:11:05 -0400
parents 0b3d90514e85
children b09d9350a2d9
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6410
e4eb71ae8e96 Changed .h ifdef/defines to use <NAME>_H format.
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1 #ifndef MAIL_TRANSACTION_LOG_VIEW_H
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2 #define MAIL_TRANSACTION_LOG_VIEW_H
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3
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3da42dafa798 buffer_create_[const_]data() API change: Take buffer_t as parameter instead of allocating it.
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4 #include "buffer.h"
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d11efbf1d341 Added fcntl_lock_disable setting to allow indexes to work with NFS. Some
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5 #include "file-dotlock.h"
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6 #include "mail-transaction-log.h"
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7
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8 /* Synchronization can take a while sometimes, especially when copying lots of
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9 mails. */
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10 #define MAIL_TRANSCATION_LOG_LOCK_TIMEOUT (3*60)
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11 #define MAIL_TRANSCATION_LOG_LOCK_CHANGE_TIMEOUT (3*60)
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12
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13 /* Rotate when log is older than ROTATE_TIME and larger than MIN_SIZE */
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14 #define MAIL_TRANSACTION_LOG_ROTATE_MIN_SIZE (1024*32)
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15 /* If log is larger than MAX_SIZE, rotate regardless of the time */
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16 #define MAIL_TRANSACTION_LOG_ROTATE_MAX_SIZE (1024*1024)
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17 #define MAIL_TRANSACTION_LOG_ROTATE_TIME (60*5)
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18
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19 /* Delete .log.2 files older than this many seconds */
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20 #define MAIL_TRANSACTION_LOG2_STALE_SECS (60*30)
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21
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22 #define MAIL_TRANSACTION_LOG_FILE_IN_MEMORY(file) ((file)->fd == -1)
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23
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24 #define LOG_FILE_MODSEQ_CACHE_SIZE 10
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25
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26 struct modseq_cache {
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27 uoff_t offset;
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28 uint64_t highest_modseq;
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29 };
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30
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31 struct mail_transaction_log_file {
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32 struct mail_transaction_log *log;
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33 struct mail_transaction_log_file *next;
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34
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35 /* refcount=0 is a valid state. files start that way, and they're
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36 freed only when mail_transaction_logs_clean() is called. */
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37 int refcount;
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38
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39 char *filepath;
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40 int fd;
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41
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42 ino_t st_ino;
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43 dev_t st_dev;
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4e0269adb24a Don't rotate transaction log too often
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44 time_t last_mtime;
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0403596c93fd index.log file is now rotated to .index.log.2 file. When log file is
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45 uoff_t last_size;
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46
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47 struct mail_transaction_log_header hdr;
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48 buffer_t mmap_buffer;
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49 buffer_t *buffer;
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50 uoff_t buffer_offset;
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51 void *mmap_base;
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52 size_t mmap_size;
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53
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54 /* points to the next uncommitted transaction. usually same as EOF. */
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55 uoff_t sync_offset;
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56 /* highest modseq at sync_offset */
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57 uint64_t sync_highest_modseq;
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58 /* saved_tail_offset is the offset that was last written to transaction
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59 log. max_tail_offset is what should be written to the log the next
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60 time a transaction is written. transaction log handling may update
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61 max_tail_offset automatically by making it skip external transactions
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62 after the last saved offset (to avoid re-reading them unneededly). */
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63 uoff_t saved_tail_offset, max_tail_offset;
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64 /* don't give warnings about saved_tail_offset shrinking if
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65 sync_offset is less than this. */
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66 uoff_t saved_tail_sync_offset;
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67
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68 struct modseq_cache modseq_cache[LOG_FILE_MODSEQ_CACHE_SIZE];
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69
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70 struct file_lock *file_lock;
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71
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72 unsigned int locked:1;
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73 unsigned int corrupted:1;
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74 };
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75
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76 struct mail_transaction_log {
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77 struct mail_index *index;
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78 struct mail_transaction_log_view *views;
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79
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80 /* files is a linked list of all the opened log files. the list is
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81 sorted by the log file sequence, so that transaction views can use
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82 them easily. head contains a pointer to the newest log file. */
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83 struct mail_transaction_log_file *files, *head;
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84 /* open_file is used temporarily while opening the log file.
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85 if _open() failed, it's left there for _create(). */
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86 struct mail_transaction_log_file *open_file;
1974
d85f71ffeb8f file_dotlock_open/delete/replace now has lock_suffix parameter. NULL
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87
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88 unsigned int dotlock_count;
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9c4aa309dbac Changed dotlocking API.
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89 struct dotlock_settings dotlock_settings, new_dotlock_settings;
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90 struct dotlock *dotlock;
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91 };
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92
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93 void
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94 mail_transaction_log_file_set_corrupted(struct mail_transaction_log_file *file,
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95 const char *fmt, ...)
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6a64e64fa3a3 Renamed __attr_*__ to ATTR_*. Renamed __attrs_used__ to ATTRS_DEFINED.
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96 ATTR_FORMAT(2, 3);
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97
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98 struct mail_transaction_log_file *
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99 mail_transaction_log_file_alloc_in_memory(struct mail_transaction_log *log);
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100 struct mail_transaction_log_file *
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101 mail_transaction_log_file_alloc(struct mail_transaction_log *log,
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102 const char *path);
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103 void mail_transaction_log_file_free(struct mail_transaction_log_file **file);
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104
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105 int mail_transaction_log_file_open(struct mail_transaction_log_file *file,
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106 bool check_existing);
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107 int mail_transaction_log_file_create(struct mail_transaction_log_file *file,
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108 bool reset);
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109 int mail_transaction_log_file_lock(struct mail_transaction_log_file *file);
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110
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111 int mail_transaction_log_find_file(struct mail_transaction_log *log,
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112 uint32_t file_seq, bool nfs_flush,
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113 struct mail_transaction_log_file **file_r);
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114
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115 /* Returns 1 if ok, 0 if file is corrupted or offset range is invalid,
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116 -1 if I/O error */
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117 int mail_transaction_log_file_map(struct mail_transaction_log_file *file,
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118 uoff_t start_offset, uoff_t end_offset);
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119 void mail_transaction_log_file_move_to_memory(struct mail_transaction_log_file
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120 *file);
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121
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122 void mail_transaction_logs_clean(struct mail_transaction_log *log);
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123
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124 bool mail_transaction_log_want_rotate(struct mail_transaction_log *log);
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125 int mail_transaction_log_rotate(struct mail_transaction_log *log, bool reset);
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126 int mail_transaction_log_lock_head(struct mail_transaction_log *log);
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127 void mail_transaction_log_file_unlock(struct mail_transaction_log_file *file);
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128
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129 bool
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130 mail_transaction_header_has_modseq(const struct mail_transaction_header *hdr,
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131 const void *data,
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132 uint64_t cur_modseq);
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133 int mail_transaction_log_file_get_highest_modseq_at(
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Timo Sirainen <tss@iki.fi>
parents: 6802
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134 struct mail_transaction_log_file *file,
d10cb44ab446 Modseqs are no longer calculated from transaction log sequence + offset.
Timo Sirainen <tss@iki.fi>
parents: 6802
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135 uoff_t offset, uint64_t *highest_modseq_r);
d10cb44ab446 Modseqs are no longer calculated from transaction log sequence + offset.
Timo Sirainen <tss@iki.fi>
parents: 6802
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136 int mail_transaction_log_file_get_modseq_next_offset(
d10cb44ab446 Modseqs are no longer calculated from transaction log sequence + offset.
Timo Sirainen <tss@iki.fi>
parents: 6802
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137 struct mail_transaction_log_file *file,
d10cb44ab446 Modseqs are no longer calculated from transaction log sequence + offset.
Timo Sirainen <tss@iki.fi>
parents: 6802
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138 uint64_t modseq, uoff_t *next_offset_r);
d10cb44ab446 Modseqs are no longer calculated from transaction log sequence + offset.
Timo Sirainen <tss@iki.fi>
parents: 6802
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139
1915
79790750c349 importing new index code. mbox still broken.
Timo Sirainen <tss@iki.fi>
parents:
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140 #endif