subversion/libsvn_fs_base/bdb/lock-tokens-table.c

   1 /* lock-tokens-table.c : operations on the `lock-tokens' table
   2  *
   3  * ====================================================================
   4  * Copyright (c) 2000-2004 CollabNet.  All rights reserved.
   5  *
   6  * This software is licensed as described in the file COPYING, which
   7  * you should have received as part of this distribution.  The terms
   8  * are also available at http://subversion.tigris.org/license-1.html.
   9  * If newer versions of this license are posted there, you may use a
  10  * newer version instead, at your option.
  11  *
  12  * This software consists of voluntary contributions made by many
  13  * individuals.  For exact contribution history, see the revision
  14  * history and logs, available at http://subversion.tigris.org/.
  15  * ====================================================================
  16  */
  17
  18 #include <string.h>
  19 #include <assert.h>
  20 #include "bdb_compat.h"
  21
  22 #include "svn_pools.h"
  23 #include "dbt.h"
  24 #include "../err.h"
  25 #include "../fs.h"
  26 #include "../util/skel.h"
  27 #include "../util/fs_skels.h"
  28 #include "../trail.h"
  29 #include "../../libsvn_fs/fs-loader.h"
  30 #include "bdb-err.h"
  31 #include "lock-tokens-table.h"
  32 #include "locks-table.h"
  33
  34 #include "private/svn_fs_util.h"
  35
  36
  37 int
  38 svn_fs_bdb__open_lock_tokens_table(DB **lock_tokens_p,
  39                                    DB_ENV *env,
  40                                    svn_boolean_t create)
  41 {
  42   const u_int32_t open_flags = (create ? (DB_CREATE | DB_EXCL) : 0);
  43   DB *lock_tokens;
  44   int error;
  45
  46   BDB_ERR(svn_fs_bdb__check_version());
  47   BDB_ERR(db_create(&lock_tokens, env, 0));
  48   error = (lock_tokens->open)(SVN_BDB_OPEN_PARAMS(lock_tokens, NULL),
  49                               "lock-tokens", 0, DB_BTREE,
  50                               open_flags, 0666);
  51
  52   /* Create the table if it doesn't yet exist.  This is a form of
  53      automagical repository upgrading. */
  54   if (error == ENOENT && (! create))
  55     {
  56       BDB_ERR(lock_tokens->close(lock_tokens, 0));
  57       return svn_fs_bdb__open_lock_tokens_table(lock_tokens_p, env, TRUE);
  58     }
  59   BDB_ERR(error);
  60
  61   *lock_tokens_p = lock_tokens;
  62   return 0;
  63 }
  64
  65
  66 svn_error_t *
  67 svn_fs_bdb__lock_token_add(svn_fs_t *fs,
  68                            const char *path,
  69                            const char *lock_token,
  70                            trail_t *trail,
  71                            apr_pool_t *pool)
  72 {
  73
  74   base_fs_data_t *bfd = fs->fsap_data;
  75   DBT key, value;
  76
  77   svn_fs_base__str_to_dbt(&key, path);
  78   svn_fs_base__str_to_dbt(&value, lock_token);
  79   svn_fs_base__trail_debug(trail, "lock-tokens", "add");
  80   SVN_ERR(BDB_WRAP(fs, "storing lock token record",
  81                    bfd->lock_tokens->put(bfd->lock_tokens, trail->db_txn,
  82                                          &key, &value, 0)));
  83
  84   return SVN_NO_ERROR;
  85 }
  86
  87
  88 svn_error_t *
  89 svn_fs_bdb__lock_token_delete(svn_fs_t *fs,
  90                               const char *path,
  91                               trail_t *trail,
  92                               apr_pool_t *pool)
  93 {
  94   base_fs_data_t *bfd = fs->fsap_data;
  95   DBT key;
  96   int db_err;
  97
  98   svn_fs_base__str_to_dbt(&key, path);
  99   svn_fs_base__trail_debug(trail, "lock-tokens", "del");
 100   db_err = bfd->lock_tokens->del(bfd->lock_tokens, trail->db_txn, &key, 0);
 101   if (db_err == DB_NOTFOUND)
 102     return SVN_FS__ERR_NO_SUCH_LOCK(fs, path);
 103   SVN_ERR(BDB_WRAP(fs, "deleting entry from 'lock-tokens' table", db_err));
 104
 105   return SVN_NO_ERROR;
 106 }
 107
 108
 109 svn_error_t *
 110 svn_fs_bdb__lock_token_get(const char **lock_token_p,
 111                            svn_fs_t *fs,
 112                            const char *path,
 113                            trail_t *trail,
 114                            apr_pool_t *pool)
 115 {
 116   base_fs_data_t *bfd = fs->fsap_data;
 117   DBT key, value;
 118   svn_error_t *err;
 119   svn_lock_t *lock;
 120   const char *lock_token;
 121   int db_err;
 122
 123   svn_fs_base__trail_debug(trail, "lock-tokens", "get");
 124   db_err = bfd->lock_tokens->get(bfd->lock_tokens, trail->db_txn,
 125                                  svn_fs_base__str_to_dbt(&key, path),
 126                                  svn_fs_base__result_dbt(&value),
 127                                  0);
 128   svn_fs_base__track_dbt(&value, pool);
 129
 130   if (db_err == DB_NOTFOUND)
 131     return SVN_FS__ERR_NO_SUCH_LOCK(fs, path);
 132   SVN_ERR(BDB_WRAP(fs, "reading lock token", db_err));
 133
 134   lock_token = apr_pstrmemdup(pool, value.data, value.size);
 135
 136   /* Make sure the token still points to an existing, non-expired
 137      lock, by doing a lookup in the `locks' table. */
 138   err = svn_fs_bdb__lock_get(&lock, fs, lock_token, trail, pool);
 139   if (err && ((err->apr_err == SVN_ERR_FS_LOCK_EXPIRED)
 140               || (err->apr_err == SVN_ERR_FS_BAD_LOCK_TOKEN)))
 141     {
 142       /* If `locks' doesn't have the lock, then we should lose it too. */
 143       svn_error_t *delete_err;
 144       delete_err = svn_fs_bdb__lock_token_delete(fs, path, trail, pool);
 145       if (delete_err)
 146         svn_error_compose(err, delete_err);
 147       return err;
 148     }
 149   else if (err)
 150     return err;
 151
 152   *lock_token_p = lock_token;
 153   return SVN_NO_ERROR;
 154 }