mirror of
https://github.com/containers/fuse-overlayfs.git
synced 2025-09-07 14:21:36 -04:00
b28a23a39d
Add a simple plugin mechanism that will help to expand fuse-overlayfs functionalities, in particular it allows to load data from a layer on demand. A plugin is loaded into fuse-overlayfs using the option: -o plugins=path/to/plugin.so:path/to/another/plugin.so A layer can use a plugin with the syntax: -o lowerdir=//plugin-name/DATA-FOR-THE-PLUGIN/path Each time a file/directory is looked up, if a plugin is registered for a layer, the plugin is first notified about the request. After the callback is invoked, fuse-overlayfs still expects the data to be accessible at the specified directory. Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
42 lines
1.2 KiB
C
42 lines
1.2 KiB
C
/* fuse-overlayfs: Overlay Filesystem in Userspace
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Copyright (C) 2019 Red Hat Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef PLUGIN_H
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# define PLUGIN_H
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# include <config.h>
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# include <fuse-overlayfs.h>
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# include <utils.h>
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typedef struct data_source *(*plugin_load_data_source)(struct ovl_layer *layer, const char *opaque, const char *path);
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typedef int (*plugin_release)(struct ovl_layer *layer);
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typedef const char *(*plugin_name)();
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typedef int (*plugin_version)();
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struct ovl_plugin
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{
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struct ovl_plugin *next;
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const char *name;
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void *handle;
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plugin_load_data_source load;
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plugin_release release;
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};
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#endif
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