fsrepo

Documentation

Overview

package fsrepo

TODO explain the package roadmap...

.ipfs/
├── client/
|   ├── client.lock          <------ protects client/ + signals its own pid
│   ├── ipfs-client.cpuprof
│   └── ipfs-client.memprof
├── config
├── daemon/
│   ├── daemon.lock          <------ protects daemon/ + signals its own address
│   ├── ipfs-daemon.cpuprof
│   └── ipfs-daemon.memprof
├── datastore/
├── repo.lock                <------ protects datastore/ and config
└── version

Index

• Constants
• Variables
• func APIAddr(repoPath string) (ma.Multiaddr, error)
• func AddDatastoreConfigHandler(name string, dsc ConfigFromMap) error
• func BestKnownPath() (string, error)
• func ConfigAt(repoPath string) (*config.Config, error)
• func Init(repoPath string, conf *config.Config) error
• func IsInitialized(path string) bool
• func LockedByOtherProcess(repoPath string) (bool, error)
• func Open(repoPath string) (repo.Repo, error)
• type ConfigFromMap
• type DatastoreConfig
  • func AnyDatastoreConfig(params map[string]interface{}) (DatastoreConfig, error)
  • func LogDatastoreConfig(params map[string]interface{}) (DatastoreConfig, error)
  • func MeasureDatastoreConfig(params map[string]interface{}) (DatastoreConfig, error)
  • func MemDatastoreConfig(params map[string]interface{}) (DatastoreConfig, error)
  • func MountDatastoreConfig(params map[string]interface{}) (DatastoreConfig, error)
• type DiskSpec
  • func (spec DiskSpec) Bytes() []byte
  • func (spec DiskSpec) String() string
• type FSRepo
  • func (r *FSRepo) BackupConfig(prefix string) (string, error)
  • func (r *FSRepo) Close() error
  • func (r *FSRepo) Config() (*config.Config, error)
  • func (r *FSRepo) Datastore() repo.Datastore
  • func (r *FSRepo) FileManager() *filestore.FileManager
  • func (r *FSRepo) GetConfigKey(key string) (interface{}, error)
  • func (r *FSRepo) GetStorageUsage() (uint64, error)
  • func (r *FSRepo) Keystore() keystore.Keystore
  • func (r *FSRepo) Path() string
  • func (r *FSRepo) SetAPIAddr(addr ma.Multiaddr) error
  • func (r *FSRepo) SetConfig(updated *config.Config) error
  • func (r *FSRepo) SetConfigKey(key string, value interface{}) error
  • func (r *FSRepo) SwarmKey() ([]byte, error)
• type NoRepoError
  • func (err NoRepoError) Error() string

Constants

const LockFile = "repo.lock"

LockFile is the filename of the repo lock, relative to config dir TODO rename repo lock and hide name

Variables

var (
	ErrNoVersion     = errors.New("no version file found, please run 0-to-1 migration tool.\n" + migrationInstructions)
	ErrOldRepo       = errors.New("btfs repo found in old '~/.go-btfs' location, please run migration tool.\n" + migrationInstructions)
	ErrNeedMigration = errors.New("btfs repo needs migration")
)

var RepoVersion = 10

version number that we are currently expecting to see

Functions

func APIAddr

func APIAddr(repoPath string) (ma.Multiaddr, error)

APIAddr returns the registered API addr, according to the api file in the fsrepo. This is a concurrent operation, meaning that any process may read this file. modifying this file, therefore, should use "mv" to replace the whole file and avoid interleaved read/writes.

func AddDatastoreConfigHandler

func AddDatastoreConfigHandler(name string, dsc ConfigFromMap) error

func BestKnownPath

func BestKnownPath() (string, error)

BestKnownPath returns the best known fsrepo path. If the ENV override is present, this function returns that value. Otherwise, it returns the default repo path.

func ConfigAt

func ConfigAt(repoPath string) (*config.Config, error)

ConfigAt returns an error if the FSRepo at the given path is not initialized. This function allows callers to read the config file even when another process is running and holding the lock.

func Init

func Init(repoPath string, conf *config.Config) error

Init initializes a new FSRepo at the given path with the provided config. TODO add support for custom datastores.

func IsInitialized

func IsInitialized(path string) bool

IsInitialized returns true if the repo is initialized at provided |path|.

func LockedByOtherProcess

func LockedByOtherProcess(repoPath string) (bool, error)

LockedByOtherProcess returns true if the FSRepo is locked by another process. If true, then the repo cannot be opened by this process.

func Open

func Open(repoPath string) (repo.Repo, error)

Open the FSRepo at path. Returns an error if the repo is not initialized.

Types

type ConfigFromMap

type ConfigFromMap func(map[string]interface{}) (DatastoreConfig, error)

ConfigFromMap creates a new datastore config from a map

type DatastoreConfig

type DatastoreConfig interface {
	// DiskSpec returns a minimal configuration of the datastore
	// represting what is stored on disk.  Run time values are
	// excluded.
	DiskSpec() DiskSpec

	// Create instantiate a new datastore from this config
	Create(path string) (repo.Datastore, error)
}

DatastoreConfig is an abstraction of a datastore config. A "spec" is first converted to a DatastoreConfig and then Create() is called to instantiate a new datastore

func AnyDatastoreConfig

func AnyDatastoreConfig(params map[string]interface{}) (DatastoreConfig, error)

AnyDatastoreConfig returns a DatastoreConfig from a spec based on the "type" parameter

func LogDatastoreConfig

func LogDatastoreConfig(params map[string]interface{}) (DatastoreConfig, error)

LogDatastoreConfig returns a log DatastoreConfig from a spec

func MeasureDatastoreConfig

func MeasureDatastoreConfig(params map[string]interface{}) (DatastoreConfig, error)

MeasureDatastoreConfig returns a measure DatastoreConfig from a spec

func MemDatastoreConfig

func MemDatastoreConfig(params map[string]interface{}) (DatastoreConfig, error)

MemDatastoreConfig returns a memory DatastoreConfig from a spec

func MountDatastoreConfig

func MountDatastoreConfig(params map[string]interface{}) (DatastoreConfig, error)

MountDatastoreConfig returns a mount DatastoreConfig from a spec

type DiskSpec

type DiskSpec map[string]interface{}

DiskSpec is a minimal representation of the characteristic values of the datastore. If two diskspecs are the same, the loader assumes that they refer to exactly the same datastore. If they differ at all, it is assumed they are completely different datastores and a migration will be performed. Runtime values such as cache options or concurrency options should not be added here.

func (DiskSpec) Bytes

func (spec DiskSpec) Bytes() []byte

Bytes returns a minimal JSON encoding of the DiskSpec

func (DiskSpec) String

func (spec DiskSpec) String() string

String returns a minimal JSON encoding of the DiskSpec

type FSRepo

type FSRepo struct {
	// contains filtered or unexported fields
}

FSRepo represents an BTFS FileSystem Repo. It is safe for use by multiple callers.

func (*FSRepo) BackupConfig

func (r *FSRepo) BackupConfig(prefix string) (string, error)

func (*FSRepo) Close

func (r *FSRepo) Close() error

Close closes the FSRepo, releasing held resources.

func (*FSRepo) Config

func (r *FSRepo) Config() (*config.Config, error)

Config the current config. This function DOES NOT copy the config. The caller MUST NOT modify it without first calling `Clone`.

Result when not Open is undefined. The method may panic if it pleases.

func (*FSRepo) Datastore

func (r *FSRepo) Datastore() repo.Datastore

Datastore returns a repo-owned datastore. If FSRepo is Closed, return value is undefined.

func (*FSRepo) FileManager

func (r *FSRepo) FileManager() *filestore.FileManager

func (*FSRepo) GetConfigKey

func (r *FSRepo) GetConfigKey(key string) (interface{}, error)

GetConfigKey retrieves only the value of a particular key.

func (*FSRepo) GetStorageUsage

func (r *FSRepo) GetStorageUsage() (uint64, error)

GetStorageUsage computes the storage space taken by the repo in bytes

func (*FSRepo) Keystore

func (r *FSRepo) Keystore() keystore.Keystore

func (*FSRepo) Path

func (r *FSRepo) Path() string

func (*FSRepo) SetAPIAddr

func (r *FSRepo) SetAPIAddr(addr ma.Multiaddr) error

SetAPIAddr writes the API Addr to the /api file.

func (*FSRepo) SetConfig

func (r *FSRepo) SetConfig(updated *config.Config) error

SetConfig updates the FSRepo's config. The user must not modify the config object after calling this method.

func (*FSRepo) SetConfigKey

func (r *FSRepo) SetConfigKey(key string, value interface{}) error

SetConfigKey writes the value of a particular key.

func (*FSRepo) SwarmKey

func (r *FSRepo) SwarmKey() ([]byte, error)

type NoRepoError

type NoRepoError struct {
	Path string
}

func (NoRepoError) Error

func (err NoRepoError) Error() string