src/storage/blobfs/bin/meta/blobfs.cml

// Copyright 2022 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
{
    include: [
        "inspect/client.shard.cml",
        "syslog/client.shard.cml",
        "trace/client.shard.cml",
    ],
    program: {
        runner: "elf",
        binary: "bin/blobfs",
        args: [ "component" ],
        lifecycle: { stop_event: "notify" },
    },
    children: [
        {
            name: "decompressor",
            url: "#meta/decompressor-sandbox.cm",
        },
    ],
    capabilities: [
        {
            directory: "root",
            rights: [ "rw*" ],
            path: "/root",
        },
        {
            directory: "blob-exec",
            rights: [
                "execute",
                "rw*",
            ],
            path: "/root",
        },
        {
            protocol: [
                "fuchsia.fs.Admin",
                "fuchsia.fxfs.BlobCreator",
                "fuchsia.fxfs.BlobReader",
                "fuchsia.update.verify.ComponentOtaHealthCheck",
            ],
        },
        {
            protocol: "fuchsia.fs.startup.Startup",
            path: "/startup/fuchsia.fs.startup.Startup",
        },
    ],
    use: [
        {
            protocol: [
                // Without this, blobfs won't be able to mint executables, but it can still read
                // and write blobs.
                "fuchsia.kernel.VmexResource",

                // Without this, blobfs won't be able to set the deadline profile for it's pager
                // threads, which may degrade performance.
                "fuchsia.scheduler.RoleManager",
            ],
            availability: "optional",
        },
        {
            protocol: "fuchsia.blobfs.internal.DecompressorCreator",
            from: "#decompressor",
        },
    ],
    offer: [
        {
            protocol: "fuchsia.scheduler.RoleManager",
            from: "parent",
            to: "#decompressor",
            availability: "optional",
        },
    ],
    expose: [
        {
            directory: "root",
            from: "self",
        },
        {
            directory: "blob-exec",
            from: "self",
        },
        {
            protocol: [
                "fuchsia.fs.Admin",
                "fuchsia.fs.startup.Startup",
                "fuchsia.fxfs.BlobCreator",
                "fuchsia.fxfs.BlobReader",
                "fuchsia.update.verify.ComponentOtaHealthCheck",
            ],
            from: "self",
        },
        {
            protocol: "fuchsia.update.verify.ComponentOtaHealthCheck",
            from: "self",
            to: "framework",
        },
    ],
    config: {
        // The number of pager threads to spawn.  Setting to <= 0 will result in an
        // implementation-chosen value being used.
        pager_threads: { type: "int32" },
    },
}