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2.4 mod_dav_fs: add DAVLockDBType and add global mutex around lockdb use #399

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@notroj notroj commented Dec 8, 2023

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notroj and others added 5 commits December 8, 2023 11:22
  error message references to "property" databases since these
  functions are used for both propdbs and the lock database.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1912477 13f79535-47bb-0310-9956-ffa450edef68
(cherry picked from commit c6d7943)
  APR_MAJOR_VERSION, APU_MAJOR_VERSION is not defined for APR trunk
  since the #include <apu_version.h> is conditional on APR < 2.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1912571 13f79535-47bb-0310-9956-ffa450edef68
(cherry picked from commit fb0ac6a)
* modules/dav/fs/dbm.c (dav_dbm_open_direct): Take a dbmtype argument
  and use it to select the apr_dbm driver type.
  (dav_dbm_open): Continue to use the "default" propdb type to open
  the property databases.

* modules/dav/fs/lock.c: Store and pass through the lockdb_type
  through.

* modules/dav/fs/mod_dav_fs.c (dav_get_lockdb_path): Return the dbm
  type via an output argument.
  (dav_fs_cmd_davlockdbtype): New config directive.
  (dav_fs_merge_server_config): Merge the dbm type.
  (dav_fs_post_config): Set the default lockdb type.

* modules/dav/fs/repos.h: Update prototypes as above; internal API
  only so no compat concerns.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1912718 13f79535-47bb-0310-9956-ffa450edef68
(cherry picked from commit afcdbee)
apr_dbm does not provide thread-safe locking:

* modules/dav/fs/mod_dav_fs.c (dav_fs_get_server_conf):
  Replaces dav_get_lockdb_path.
  (dav_fs_pre_config, dav_fs_child_init): New hooks.
  (dav_fs_post_config): Create & store the mutex here.
  (register_hooks): Register new hooks.

* modules/dav/fs/repos.h: Expose new dav_fs_server_conf struct.

* modules/dav/fs/lock.c (dav_fs_lockdb_cleanup): New cleanup
  which unlocks and closes the dbm handle.
  (dav_fs_really_open_lockdb): Lock the mutex here, register a
  cleanup.
  (dav_fs_open_lockdb): Adjust to use dav_fs_get_server_conf.
  (dav_fs_close_lockdb): Run the cleanup here.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1914438 13f79535-47bb-0310-9956-ffa450edef68
(cherry picked from commit 455147a)
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