[PATCH pve-storage 02/13] api: plugins/storage: add initial routes and endpoints

["Max R. Carrara" <m.carrara@proxmox.com>]

Add the following routes / endpoints:

* `GET plugins/storage`
  Subdir index--lists the direct child path components (so, just
  'plugin' currently).

* `GET plugins/storage/plugin`
  Lists all installed storage plugins and their metadata.
  Currently, this is just an array of objects, with each object
  containing the plugin's `type()` and Perl module path.

* `GET plugins/storage/plugin/{type}`
  Returns the metadata for a single plugin given by `{type}`.

Signed-off-by: Max R. Carrara <m.carrara@proxmox.com>
---
 src/PVE/API2/Makefile                  |   1 +
 src/PVE/API2/Plugins/Makefile          |  18 +++++
 src/PVE/API2/Plugins/Storage.pm        |  54 +++++++++++++
 src/PVE/API2/Plugins/Storage/Makefile  |  17 ++++
 src/PVE/API2/Plugins/Storage/Plugin.pm | 104 +++++++++++++++++++++++++
 5 files changed, 194 insertions(+)
 create mode 100644 src/PVE/API2/Plugins/Makefile
 create mode 100644 src/PVE/API2/Plugins/Storage.pm
 create mode 100644 src/PVE/API2/Plugins/Storage/Makefile
 create mode 100644 src/PVE/API2/Plugins/Storage/Plugin.pm

diff --git a/src/PVE/API2/Makefile b/src/PVE/API2/Makefile
index fe316c52..01b7b28f 100644
--- a/src/PVE/API2/Makefile
+++ b/src/PVE/API2/Makefile
@@ -5,3 +5,4 @@ install:
 	install -D -m 0644 Disks.pm ${DESTDIR}${PERLDIR}/PVE/API2/Disks.pm
 	make -C Storage install
 	make -C Disks install
+	make -C Plugins install
diff --git a/src/PVE/API2/Plugins/Makefile b/src/PVE/API2/Plugins/Makefile
new file mode 100644
index 00000000..f59e75b6
--- /dev/null
+++ b/src/PVE/API2/Plugins/Makefile
@@ -0,0 +1,18 @@
+SOURCES = Storage.pm		\
+
+
+SUBDIRS = Storage		\
+
+
+INSTALL_PATH = ${DESTDIR}${PERLDIR}/PVE/API2/Plugins
+
+
+.PHONY: install
+install:
+	set -e && for SOURCE in ${SOURCES}; \
+		do install -D -m 0644 $$SOURCE ${INSTALL_PATH}/$$SOURCE; \
+	done
+	set -e && for SUBDIR in ${SUBDIRS}; \
+		do make -C $$SUBDIR install; \
+	done
+
diff --git a/src/PVE/API2/Plugins/Storage.pm b/src/PVE/API2/Plugins/Storage.pm
new file mode 100644
index 00000000..53b883fd
--- /dev/null
+++ b/src/PVE/API2/Plugins/Storage.pm
@@ -0,0 +1,54 @@
+package PVE::API2::Plugins::Storage;
+
+use v5.36;
+
+use PVE::Storage;
+use PVE::Storage::Plugin;
+
+use PVE::API2::Plugins::Storage::Plugin;
+
+use PVE::RESTHandler;
+use base qw(PVE::RESTHandler);
+
+__PACKAGE__->register_method({
+    subclass => 'PVE::API2::Plugins::Storage::Plugin',
+    path => 'plugin',
+});
+
+# plugins/storage
+
+__PACKAGE__->register_method({
+    name => 'index',
+    path => '',
+    method => 'GET',
+    description => 'Directory index.',
+    permissions => {
+        user => 'all',
+    },
+    parameters => {
+        additionalProperties => 0,
+        properties => {},
+    },
+    returns => {
+        type => 'array',
+        items => {
+            type => "object",
+            additionalProperties => 0,
+            properties => {
+                subdir => {
+                    type => 'string',
+                },
+            },
+        },
+        links => [{ rel => 'child', href => "{subdir}" }],
+    },
+    code => sub($param) {
+        my $result = [
+            { subdir => 'plugin' },
+        ];
+
+        return $result;
+    },
+});
+
+1;
diff --git a/src/PVE/API2/Plugins/Storage/Makefile b/src/PVE/API2/Plugins/Storage/Makefile
new file mode 100644
index 00000000..06473a2f
--- /dev/null
+++ b/src/PVE/API2/Plugins/Storage/Makefile
@@ -0,0 +1,17 @@
+SOURCES = Plugin.pm		\
+
+
+SUBDIRS =
+
+
+INSTALL_PATH = ${DESTDIR}${PERLDIR}/PVE/API2/Plugins/Storage
+
+.PHONY: install
+install:
+	set -e && for SOURCE in ${SOURCES}; \
+		do install -D -m 0644 $$SOURCE ${INSTALL_PATH}/$$SOURCE; \
+	done
+	set -e && for SUBDIR in ${SUBDIRS}; \
+		do make -C $$SUBDIR install; \
+	done
+
diff --git a/src/PVE/API2/Plugins/Storage/Plugin.pm b/src/PVE/API2/Plugins/Storage/Plugin.pm
new file mode 100644
index 00000000..fd0f734b
--- /dev/null
+++ b/src/PVE/API2/Plugins/Storage/Plugin.pm
@@ -0,0 +1,104 @@
+package PVE::API2::Plugins::Storage::Plugin;
+
+use v5.36;
+
+use HTTP::Status qw(:constants);
+
+use PVE::Exception qw(raise);
+use PVE::Storage;
+use PVE::Storage::Plugin;
+use PVE::Tools qw(extract_param);
+
+use PVE::RESTHandler;
+use base qw(PVE::RESTHandler);
+
+my $ALL_PLUGIN_TYPES = PVE::Storage::Plugin->lookup_types();
+
+my $PLUGIN_METADATA_SCHEMA = {
+    type => 'object',
+    additionalProperties => 0,
+    properties => {
+        module => {
+            type => 'string',
+            optional => 0,
+        },
+        type => {
+            type => 'string',
+            optional => 0,
+            enum => $ALL_PLUGIN_TYPES,
+        },
+    },
+};
+
+# plugins/storage/plugin
+
+__PACKAGE__->register_method({
+    name => 'index',
+    path => '',
+    method => 'GET',
+    description => 'List all available storage plugins and their metadata.',
+    permissions => {
+        user => 'all',
+    },
+    parameters => {
+        additionalProperties => 0,
+        properties => {},
+    },
+    returns => {
+        type => 'array',
+        items => $PLUGIN_METADATA_SCHEMA,
+    },
+    code => sub($param) {
+        my $result = [];
+
+        for my $type ($ALL_PLUGIN_TYPES->@*) {
+            my $plugin = PVE::Storage::Plugin->lookup($type);
+
+            my $item = {
+                module => $plugin,
+                type => $type,
+            };
+
+            push($result->@*, $item);
+        }
+
+        return $result;
+    },
+});
+
+# plugins/storage/plugin/{type}
+
+__PACKAGE__->register_method({
+    name => 'info',
+    path => '{type}',
+    method => 'GET',
+    description => 'Fetch metadata of a storage plugin.',
+    permissions => {
+        user => 'all',
+    },
+    parameters => {
+        additionalProperties => 0,
+        properties => {
+            type => {
+                type => 'string',
+            },
+        },
+    },
+    returns => $PLUGIN_METADATA_SCHEMA,
+    code => sub($param) {
+        my $param_type = extract_param($param, 'type');
+
+        my $plugin = eval { PVE::Storage::Plugin->lookup($param_type) };
+        if ($@) {
+            raise("Plugin '$param_type' not found - $@", code => HTTP_NOT_FOUND);
+        }
+
+        my $result = {
+            module => $plugin,
+            type => $param_type,
+        };
+
+        return $result;
+    },
+});
+1;
-- 
2.47.3