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mount: Dump external bind-mounts with plugins

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External bind mounts are those with source sitting outside of the
current FS view. Such are detected in validate_mounts(), so we
just go ahead and call plugins.

The plugin is provided with the mountpoint to decide whether it's
his or not (what else does the guy need?) and an ID with this it
can identify the mountpoint in /proc. The same ID will be used at
restore time to find the needed restore info.

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
This commit is contained in:
Pavel Emelyanov
2013-12-25 16:54:36 +04:00
parent db33a144d2
commit d21ff39aab
6 changed files with 39 additions and 8 deletions
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9
plugin.c
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@@ -19,6 +19,7 @@ struct cr_plugin_entry {
cr_plugin_restore_unix_sk_t *cr_plugin_restore_unix_sk;
cr_plugin_dump_file_t *cr_plugin_dump_file;
cr_plugin_restore_file_t *cr_plugin_restore_file;
cr_plugin_dump_ext_mount_t *cr_plugin_dump_ext_mount;
};
struct cr_plugin_entry *next;
@@ -31,6 +32,7 @@ struct cr_plugins {
struct cr_plugin_entry *cr_plugin_restore_unix_sk;
struct cr_plugin_entry *cr_plugin_dump_file;
struct cr_plugin_entry *cr_plugin_restore_file;
struct cr_plugin_entry *cr_plugin_dump_ext_mount;
};
struct cr_plugins cr_plugins;
@@ -87,6 +89,11 @@ int cr_plugin_restore_file(int id)
return run_plugin_funcs(cr_plugin_restore_file, id);
}
int cr_plugin_dump_ext_mount(char *mountpoint, int id)
{
return run_plugin_funcs(cr_plugin_dump_ext_mount, mountpoint, id);
}
static int cr_lib_load(char *path)
{
struct cr_plugin_entry *ce;
@@ -106,6 +113,8 @@ static int cr_lib_load(char *path)
add_plugin_func(cr_plugin_dump_file);
add_plugin_func(cr_plugin_restore_file);
add_plugin_func(cr_plugin_dump_ext_mount);
ce = NULL;
f_fini = dlsym(h, "cr_plugin_fini");
if (f_fini) {