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From:   "Stotland, Inga" <inga.stotland@intel.com>
To:     "michal.lowas-rzechonek@silvair.com" 
        <michal.lowas-rzechonek@silvair.com>
CC:     "jakub.witowski@silvair.com" <jakub.witowski@silvair.com>,
        "linux-bluetooth@vger.kernel.org" <linux-bluetooth@vger.kernel.org>,
        "Gix, Brian" <brian.gix@intel.com>
Subject: Re: [PATCH BlueZ 6/9] mesh: Define storage format specific
 read/write routines
Thread-Topic: [PATCH BlueZ 6/9] mesh: Define storage format specific
 read/write routines
Thread-Index: AQHVNt3Aor4cw0IYJkqr20V9gkOC2KbD8IiAgACXHoA=
Date:   Wed, 10 Jul 2019 16:53:37 +0000
Message-ID: <e8479618084fb5056188c86939f911cf144f8be8.camel@intel.com>
References: <20190710050959.7321-1-inga.stotland@intel.com>
         <20190710050959.7321-7-inga.stotland@intel.com>
         <20190710075245.2koao3eyj22wbj7s@mlowasrzechonek2133>
In-Reply-To: <20190710075245.2koao3eyj22wbj7s@mlowasrzechonek2133>
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Hi Michal,

On Wed, 2019-07-10 at 09:52 +0200, Micha=C5=82 Lowas-Rzechonek wrote:
> On 07/09, Inga Stotland wrote:
> > This adds the following generic APIs to mesh-config.h
> >     void *mesh_config_create_config(void);
> >     void mesh_config_release_config(void *config);
> >     void *mesh_config_get_config(const char *dir);
> >     void *mesh_config_get_config_backup(const char *dir);
> >     bool mesh_config_restore_backup(const char *dir);
> >     bool mesh_config_save_config(const char *dir, void *cfg);
> >=20
> > The implementation of these API routines depends on the
> > underlying storage directory structure and can be specific to
> > a chosen configuration file format.
>=20
> I don't like the assumption that each node is stored in a separate
> file,
> and there needs to be a backup file.
>=20
> One of the storage formats I had in mind is a single transactional
> database (some flavor of berkeley db, or maybe even sqlite) that
> would
> hold all the nodes.
>=20
> With this in mind, how about:
>=20
>     union mesh_config *mesh_config_create_config(const uint8_t
> uuid[16]);
>     bool mesh_config_save(union mesh_config *cfg);
>=20
> and to iterate over saved nodes:
>     typedef struct mesh_node *(*mesh_node_load_cb)(union mesh_config
> *cfg,
>                                                     const uint8_t
> uuid[16],
>                                                     void *user_data);
>=20
>     void mesh_config_load_nodes(mesh_node_load_cb cb, void
> *user_data);
>=20
> and move file/directory handling from storage.c to mesh-config-
> json.c?
>=20
>=20
> regards


If we do away with the notion that each node has its own directory,
this means that entire node parsing procedure needs to be pushed into
the corresponding mesh-config-<specific> implementation and storage.c
becomes obsolete.

=20

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