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mount.go
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mount.go
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// Copyright (c) HashiCorp, Inc.
// SPDX-License-Identifier: MPL-2.0
package vault
import (
"context"
"encoding/hex"
"errors"
"fmt"
"os"
"sort"
"strings"
"sync"
"time"
"github.com/armon/go-metrics"
"github.com/hashicorp/go-secure-stdlib/strutil"
"github.com/hashicorp/go-uuid"
"github.com/hashicorp/vault/builtin/plugin"
"github.com/hashicorp/vault/helper/experiments"
"github.com/hashicorp/vault/helper/metricsutil"
"github.com/hashicorp/vault/helper/namespace"
"github.com/hashicorp/vault/helper/versions"
"github.com/hashicorp/vault/sdk/helper/consts"
"github.com/hashicorp/vault/sdk/helper/jsonutil"
"github.com/hashicorp/vault/sdk/logical"
"github.com/mitchellh/copystructure"
)
const (
// coreMountConfigPath is used to store the mount configuration.
// Mounts are protected within the Vault itself, which means they
// can only be viewed or modified after an unseal.
coreMountConfigPath = "core/mounts"
// coreLocalMountConfigPath is used to store mount configuration for local
// (non-replicated) mounts
coreLocalMountConfigPath = "core/local-mounts"
// backendBarrierPrefix is the prefix to the UUID used in the
// barrier view for the backends.
backendBarrierPrefix = "logical/"
// systemBarrierPrefix is the prefix used for the
// system logical backend.
systemBarrierPrefix = "sys/"
// mountTableType is the value we expect to find for the mount table and
// corresponding entries
mountTableType = "mounts"
)
// ListingVisibilityType represents the types for listing visibility
type ListingVisibilityType string
const (
// ListingVisibilityDefault is the default value for listing visibility
ListingVisibilityDefault ListingVisibilityType = ""
// ListingVisibilityHidden is the hidden type for listing visibility
ListingVisibilityHidden ListingVisibilityType = "hidden"
// ListingVisibilityUnauth is the unauth type for listing visibility
ListingVisibilityUnauth ListingVisibilityType = "unauth"
systemMountPath = "sys/"
identityMountPath = "identity/"
cubbyholeMountPath = "cubbyhole/"
systemMountType = "system"
identityMountType = "identity"
cubbyholeMountType = "cubbyhole"
pluginMountType = "plugin"
mountTypeNSCubbyhole = "ns_cubbyhole"
MountTableUpdateStorage = true
MountTableNoUpdateStorage = false
)
// DeprecationStatus errors
var (
errMountDeprecated = errors.New("mount entry associated with deprecated builtin")
errMountPendingRemoval = errors.New("mount entry associated with pending removal builtin")
errMountRemoved = errors.New("mount entry associated with removed builtin")
)
var (
// loadMountsFailed if loadMounts encounters an error
errLoadMountsFailed = errors.New("failed to setup mount table")
// protectedMounts cannot be remounted
protectedMounts = []string{
"audit/",
"auth/",
systemMountPath,
cubbyholeMountPath,
identityMountPath,
}
untunableMounts = []string{
cubbyholeMountPath,
systemMountPath,
"audit/",
identityMountPath,
}
// singletonMounts can only exist in one location and are
// loaded by default. These are types, not paths.
singletonMounts = []string{
cubbyholeMountType,
systemMountType,
"token",
identityMountType,
}
// mountAliases maps old backend names to new backend names, allowing us
// to move/rename backends but maintain backwards compatibility
mountAliases = map[string]string{"generic": "kv"}
)
func (c *Core) generateMountAccessor(entryType string) (string, error) {
var accessor string
for {
randBytes, err := uuid.GenerateRandomBytes(4)
if err != nil {
return "", err
}
accessor = fmt.Sprintf("%s_%s", entryType, fmt.Sprintf("%08x", randBytes[0:4]))
if entry := c.router.MatchingMountByAccessor(accessor); entry == nil {
break
}
}
return accessor, nil
}
// MountTable is used to represent the internal mount table
type MountTable struct {
Type string `json:"type"`
Entries []*MountEntry `json:"entries"`
}
type MountMigrationStatus int
const (
MigrationInProgressStatus MountMigrationStatus = iota
MigrationSuccessStatus
MigrationFailureStatus
)
func (m MountMigrationStatus) String() string {
switch m {
case MigrationInProgressStatus:
return "in-progress"
case MigrationSuccessStatus:
return "success"
case MigrationFailureStatus:
return "failure"
}
return "unknown"
}
type MountMigrationInfo struct {
SourceMount string `json:"source_mount"`
TargetMount string `json:"target_mount"`
MigrationStatus string `json:"status"`
}
// tableMetrics is responsible for setting gauge metrics for
// mount table storage sizes (in bytes) and mount table num
// entries. It does this via setGaugeWithLabels. It then
// saves these metrics in a cache for regular reporting in
// a loop, via AddGaugeLoopMetric.
// Note that the reported storage sizes are pre-encryption
// sizes. Currently barrier uses aes-gcm for encryption, which
// preserves plaintext size, adding a constant of 30 bytes of
// padding, which is negligable and subject to change, and thus
// not accounted for.
func (c *Core) tableMetrics(entryCount int, isLocal bool, isAuth bool, compressedTable []byte) {
if c.metricsHelper == nil {
// do nothing if metrics are not initialized
return
}
typeAuthLabelMap := map[bool]metrics.Label{
true: {Name: "type", Value: "auth"},
false: {Name: "type", Value: "logical"},
}
typeLocalLabelMap := map[bool]metrics.Label{
true: {Name: "local", Value: "true"},
false: {Name: "local", Value: "false"},
}
c.metricSink.SetGaugeWithLabels(metricsutil.LogicalTableSizeName,
float32(entryCount), []metrics.Label{
typeAuthLabelMap[isAuth],
typeLocalLabelMap[isLocal],
})
c.metricsHelper.AddGaugeLoopMetric(metricsutil.LogicalTableSizeName,
float32(entryCount), []metrics.Label{
typeAuthLabelMap[isAuth],
typeLocalLabelMap[isLocal],
})
c.metricSink.SetGaugeWithLabels(metricsutil.PhysicalTableSizeName,
float32(len(compressedTable)), []metrics.Label{
typeAuthLabelMap[isAuth],
typeLocalLabelMap[isLocal],
})
c.metricsHelper.AddGaugeLoopMetric(metricsutil.PhysicalTableSizeName,
float32(len(compressedTable)), []metrics.Label{
typeAuthLabelMap[isAuth],
typeLocalLabelMap[isLocal],
})
}
// shallowClone returns a copy of the mount table that
// keeps the MountEntry locations, so as not to invalidate
// other locations holding pointers. Care needs to be taken
// if modifying entries rather than modifying the table itself
func (t *MountTable) shallowClone() *MountTable {
mt := &MountTable{
Type: t.Type,
Entries: make([]*MountEntry, len(t.Entries)),
}
for i, e := range t.Entries {
mt.Entries[i] = e
}
return mt
}
// setTaint is used to set the taint on given entry Accepts either the mount
// entry's path or namespace + path, i.e. <ns-path>/secret/ or <ns-path>/token/
func (t *MountTable) setTaint(nsID, path string, tainted bool, mountState string) (*MountEntry, error) {
n := len(t.Entries)
for i := 0; i < n; i++ {
if entry := t.Entries[i]; entry.Path == path && entry.Namespace().ID == nsID {
t.Entries[i].Tainted = tainted
t.Entries[i].MountState = mountState
return t.Entries[i], nil
}
}
return nil, nil
}
// remove is used to remove a given path entry; returns the entry that was
// removed
func (t *MountTable) remove(ctx context.Context, path string) (*MountEntry, error) {
n := len(t.Entries)
ns, err := namespace.FromContext(ctx)
if err != nil {
return nil, err
}
for i := 0; i < n; i++ {
if entry := t.Entries[i]; entry.Path == path && entry.Namespace().ID == ns.ID {
t.Entries[i], t.Entries[n-1] = t.Entries[n-1], nil
t.Entries = t.Entries[:n-1]
return entry, nil
}
}
return nil, nil
}
func (t *MountTable) find(ctx context.Context, path string) (*MountEntry, error) {
n := len(t.Entries)
ns, err := namespace.FromContext(ctx)
if err != nil {
return nil, err
}
for i := 0; i < n; i++ {
if entry := t.Entries[i]; entry.Path == path && entry.Namespace().ID == ns.ID {
return entry, nil
}
}
return nil, nil
}
func (t *MountTable) findByBackendUUID(ctx context.Context, backendUUID string) (*MountEntry, error) {
n := len(t.Entries)
ns, err := namespace.FromContext(ctx)
if err != nil {
return nil, err
}
for i := 0; i < n; i++ {
if entry := t.Entries[i]; entry.BackendAwareUUID == backendUUID && entry.Namespace().ID == ns.ID {
return entry, nil
}
}
return nil, nil
}
// sortEntriesByPath sorts the entries in the table by path and returns the
// table; this is useful for tests
func (t *MountTable) sortEntriesByPath() *MountTable {
sort.Slice(t.Entries, func(i, j int) bool {
return t.Entries[i].Path < t.Entries[j].Path
})
return t
}
// sortEntriesByPath sorts the entries in the table by path and returns the
// table; this is useful for tests
func (t *MountTable) sortEntriesByPathDepth() *MountTable {
sort.Slice(t.Entries, func(i, j int) bool {
return len(strings.Split(t.Entries[i].Namespace().Path+t.Entries[i].Path, "/")) < len(strings.Split(t.Entries[j].Namespace().Path+t.Entries[j].Path, "/"))
})
return t
}
const mountStateUnmounting = "unmounting"
// MountEntry is used to represent a mount table entry
type MountEntry struct {
Table string `json:"table"` // The table it belongs to
Path string `json:"path"` // Mount Path
Type string `json:"type"` // Logical backend Type. NB: This is the plugin name, e.g. my-vault-plugin, NOT plugin type (e.g. auth).
Description string `json:"description"` // User-provided description
UUID string `json:"uuid"` // Barrier view UUID
BackendAwareUUID string `json:"backend_aware_uuid"` // UUID that can be used by the backend as a helper when a consistent value is needed outside of storage.
Accessor string `json:"accessor"` // Unique but more human-friendly ID. Does not change, not used for any sensitive things (like as a salt, which the UUID sometimes is).
Config MountConfig `json:"config"` // Configuration related to this mount (but not backend-derived)
Options map[string]string `json:"options"` // Backend options
Local bool `json:"local"` // Local mounts are not replicated or affected by replication
SealWrap bool `json:"seal_wrap"` // Whether to wrap CSPs
ExternalEntropyAccess bool `json:"external_entropy_access,omitempty"` // Whether to allow external entropy source access
Tainted bool `json:"tainted,omitempty"` // Set as a Write-Ahead flag for unmount/remount
MountState string `json:"mount_state,omitempty"` // The current mount state. The only non-empty mount state right now is "unmounting"
NamespaceID string `json:"namespace_id"`
// namespace contains the populated namespace
namespace *namespace.Namespace
// synthesizedConfigCache is used to cache configuration values. These
// particular values are cached since we want to get them at a point-in-time
// without separately managing their locks individually. See SyncCache() for
// the specific values that are being cached.
synthesizedConfigCache sync.Map
// version info
Version string `json:"plugin_version,omitempty"` // The semantic version of the mounted plugin, e.g. v1.2.3.
RunningVersion string `json:"running_plugin_version,omitempty"` // The semantic version of the mounted plugin as reported by the plugin.
RunningSha256 string `json:"running_sha256,omitempty"`
}
// MountConfig is used to hold settable options
type MountConfig struct {
DefaultLeaseTTL time.Duration `json:"default_lease_ttl,omitempty" structs:"default_lease_ttl" mapstructure:"default_lease_ttl"` // Override for global default
MaxLeaseTTL time.Duration `json:"max_lease_ttl,omitempty" structs:"max_lease_ttl" mapstructure:"max_lease_ttl"` // Override for global default
ForceNoCache bool `json:"force_no_cache,omitempty" structs:"force_no_cache" mapstructure:"force_no_cache"` // Override for global default
AuditNonHMACRequestKeys []string `json:"audit_non_hmac_request_keys,omitempty" structs:"audit_non_hmac_request_keys" mapstructure:"audit_non_hmac_request_keys"`
AuditNonHMACResponseKeys []string `json:"audit_non_hmac_response_keys,omitempty" structs:"audit_non_hmac_response_keys" mapstructure:"audit_non_hmac_response_keys"`
ListingVisibility ListingVisibilityType `json:"listing_visibility,omitempty" structs:"listing_visibility" mapstructure:"listing_visibility"`
PassthroughRequestHeaders []string `json:"passthrough_request_headers,omitempty" structs:"passthrough_request_headers" mapstructure:"passthrough_request_headers"`
AllowedResponseHeaders []string `json:"allowed_response_headers,omitempty" structs:"allowed_response_headers" mapstructure:"allowed_response_headers"`
TokenType logical.TokenType `json:"token_type,omitempty" structs:"token_type" mapstructure:"token_type"`
AllowedManagedKeys []string `json:"allowed_managed_keys,omitempty" mapstructure:"allowed_managed_keys"`
UserLockoutConfig *UserLockoutConfig `json:"user_lockout_config,omitempty" mapstructure:"user_lockout_config"`
// PluginName is the name of the plugin registered in the catalog.
//
// Deprecated: MountEntry.Type should be used instead for Vault 1.0.0 and beyond.
PluginName string `json:"plugin_name,omitempty" structs:"plugin_name,omitempty" mapstructure:"plugin_name"`
}
type UserLockoutConfig struct {
LockoutThreshold uint64 `json:"lockout_threshold,omitempty" structs:"lockout_threshold" mapstructure:"lockout_threshold"`
LockoutDuration time.Duration `json:"lockout_duration,omitempty" structs:"lockout_duration" mapstructure:"lockout_duration"`
LockoutCounterReset time.Duration `json:"lockout_counter_reset,omitempty" structs:"lockout_counter_reset" mapstructure:"lockout_counter_reset"`
DisableLockout bool `json:"disable_lockout,omitempty" structs:"disable_lockout" mapstructure:"disable_lockout"`
}
type APIUserLockoutConfig struct {
LockoutThreshold string `json:"lockout_threshold,omitempty" structs:"lockout_threshold" mapstructure:"lockout_threshold"`
LockoutDuration string `json:"lockout_duration,omitempty" structs:"lockout_duration" mapstructure:"lockout_duration"`
LockoutCounterResetDuration string `json:"lockout_counter_reset_duration,omitempty" structs:"lockout_counter_reset_duration" mapstructure:"lockout_counter_reset_duration"`
DisableLockout *bool `json:"lockout_disable,omitempty" structs:"lockout_disable" mapstructure:"lockout_disable"`
}
// APIMountConfig is an embedded struct of api.MountConfigInput
type APIMountConfig struct {
DefaultLeaseTTL string `json:"default_lease_ttl" structs:"default_lease_ttl" mapstructure:"default_lease_ttl"`
MaxLeaseTTL string `json:"max_lease_ttl" structs:"max_lease_ttl" mapstructure:"max_lease_ttl"`
ForceNoCache bool `json:"force_no_cache" structs:"force_no_cache" mapstructure:"force_no_cache"`
AuditNonHMACRequestKeys []string `json:"audit_non_hmac_request_keys,omitempty" structs:"audit_non_hmac_request_keys" mapstructure:"audit_non_hmac_request_keys"`
AuditNonHMACResponseKeys []string `json:"audit_non_hmac_response_keys,omitempty" structs:"audit_non_hmac_response_keys" mapstructure:"audit_non_hmac_response_keys"`
ListingVisibility ListingVisibilityType `json:"listing_visibility,omitempty" structs:"listing_visibility" mapstructure:"listing_visibility"`
PassthroughRequestHeaders []string `json:"passthrough_request_headers,omitempty" structs:"passthrough_request_headers" mapstructure:"passthrough_request_headers"`
AllowedResponseHeaders []string `json:"allowed_response_headers,omitempty" structs:"allowed_response_headers" mapstructure:"allowed_response_headers"`
TokenType string `json:"token_type" structs:"token_type" mapstructure:"token_type"`
AllowedManagedKeys []string `json:"allowed_managed_keys,omitempty" mapstructure:"allowed_managed_keys"`
UserLockoutConfig *UserLockoutConfig `json:"user_lockout_config,omitempty" mapstructure:"user_lockout_config"`
PluginVersion string `json:"plugin_version,omitempty" mapstructure:"plugin_version"`
// PluginName is the name of the plugin registered in the catalog.
//
// Deprecated: MountEntry.Type should be used instead for Vault 1.0.0 and beyond.
PluginName string `json:"plugin_name,omitempty" structs:"plugin_name,omitempty" mapstructure:"plugin_name"`
}
type FailedLoginUser struct {
aliasName string
mountAccessor string
}
type FailedLoginInfo struct {
count uint
lastFailedLoginTime int
}
// Clone returns a deep copy of the mount entry
func (e *MountEntry) Clone() (*MountEntry, error) {
cp, err := copystructure.Copy(e)
if err != nil {
return nil, err
}
return cp.(*MountEntry), nil
}
// IsExternalPlugin returns whether the plugin is running externally
// if the RunningSha256 is non-empty, the builtin is external. Otherwise, it's builtin
func (e *MountEntry) IsExternalPlugin() bool {
return e.RunningSha256 != ""
}
// MountClass returns the mount class based on Accessor and Path
func (e *MountEntry) MountClass() string {
if e.Accessor == "" || strings.HasPrefix(e.Path, fmt.Sprintf("%s/", systemMountPath)) {
return ""
}
if e.Table == credentialTableType {
return consts.PluginTypeCredential.String()
}
return consts.PluginTypeSecrets.String()
}
// Namespace returns the namespace for the mount entry
func (e *MountEntry) Namespace() *namespace.Namespace {
return e.namespace
}
// APIPath returns the full API Path for the given mount entry
func (e *MountEntry) APIPath() string {
path := e.Path
if e.Table == credentialTableType {
path = credentialRoutePrefix + path
}
return e.namespace.Path + path
}
// APIPathNoNamespace returns the API Path without the namespace for the given mount entry
func (e *MountEntry) APIPathNoNamespace() string {
path := e.Path
if e.Table == credentialTableType {
path = credentialRoutePrefix + path
}
return path
}
// SyncCache syncs tunable configuration values to the cache. In the case of
// cached values, they should be retrieved via synthesizedConfigCache.Load()
// instead of accessing them directly through MountConfig.
func (e *MountEntry) SyncCache() {
if len(e.Config.AuditNonHMACRequestKeys) == 0 {
e.synthesizedConfigCache.Delete("audit_non_hmac_request_keys")
} else {
e.synthesizedConfigCache.Store("audit_non_hmac_request_keys", e.Config.AuditNonHMACRequestKeys)
}
if len(e.Config.AuditNonHMACResponseKeys) == 0 {
e.synthesizedConfigCache.Delete("audit_non_hmac_response_keys")
} else {
e.synthesizedConfigCache.Store("audit_non_hmac_response_keys", e.Config.AuditNonHMACResponseKeys)
}
if len(e.Config.PassthroughRequestHeaders) == 0 {
e.synthesizedConfigCache.Delete("passthrough_request_headers")
} else {
e.synthesizedConfigCache.Store("passthrough_request_headers", e.Config.PassthroughRequestHeaders)
}
if len(e.Config.AllowedResponseHeaders) == 0 {
e.synthesizedConfigCache.Delete("allowed_response_headers")
} else {
e.synthesizedConfigCache.Store("allowed_response_headers", e.Config.AllowedResponseHeaders)
}
if len(e.Config.AllowedManagedKeys) == 0 {
e.synthesizedConfigCache.Delete("allowed_managed_keys")
} else {
e.synthesizedConfigCache.Store("allowed_managed_keys", e.Config.AllowedManagedKeys)
}
}
func (entry *MountEntry) Deserialize() map[string]interface{} {
return map[string]interface{}{
"mount_path": entry.Path,
"mount_namespace": entry.Namespace().Path,
"uuid": entry.UUID,
"accessor": entry.Accessor,
"mount_type": entry.Type,
}
}
func (c *Core) decodeMountTable(ctx context.Context, raw []byte) (*MountTable, error) {
// Decode into mount table
mountTable := new(MountTable)
if err := jsonutil.DecodeJSON(raw, mountTable); err != nil {
return nil, err
}
// Populate the namespace in memory
var mountEntries []*MountEntry
for _, entry := range mountTable.Entries {
if entry.NamespaceID == "" {
entry.NamespaceID = namespace.RootNamespaceID
}
ns, err := NamespaceByID(ctx, entry.NamespaceID, c)
if err != nil {
return nil, err
}
if ns == nil {
c.logger.Error("namespace on mount entry not found", "namespace_id", entry.NamespaceID, "mount_path", entry.Path, "mount_description", entry.Description)
continue
}
entry.namespace = ns
mountEntries = append(mountEntries, entry)
}
return &MountTable{
Type: mountTable.Type,
Entries: mountEntries,
}, nil
}
// Mount is used to mount a new backend to the mount table.
func (c *Core) mount(ctx context.Context, entry *MountEntry) error {
// Ensure we end the path in a slash
if !strings.HasSuffix(entry.Path, "/") {
entry.Path += "/"
}
// Prevent protected paths from being mounted
for _, p := range protectedMounts {
if strings.HasPrefix(entry.Path, p) && entry.namespace == nil {
return logical.CodedError(403, fmt.Sprintf("cannot mount %q", entry.Path))
}
}
// Do not allow more than one instance of a singleton mount
for _, p := range singletonMounts {
if entry.Type == p {
return logical.CodedError(403, fmt.Sprintf("mount type of %q is not mountable", entry.Type))
}
}
// Mount internally
if err := c.mountInternal(ctx, entry, MountTableUpdateStorage); err != nil {
return err
}
return nil
}
func (c *Core) mountInternal(ctx context.Context, entry *MountEntry, updateStorage bool) error {
c.mountsLock.Lock()
c.authLock.Lock()
unlock := func() {
c.authLock.Unlock()
c.mountsLock.Unlock()
}
defer unlock()
ns, err := namespace.FromContext(ctx)
if err != nil {
return err
}
if err := verifyNamespace(c, ns, entry); err != nil {
return err
}
entry.NamespaceID = ns.ID
entry.namespace = ns
// Ensure the cache is populated, don't need the result
NamespaceByID(ctx, ns.ID, c)
// Basic check for matching names
for _, ent := range c.mounts.Entries {
if ns.ID == ent.NamespaceID {
switch {
// Existing is oauth/github/ new is oauth/ or
// existing is oauth/ and new is oauth/github/
case strings.HasPrefix(ent.Path, entry.Path):
fallthrough
case strings.HasPrefix(entry.Path, ent.Path):
return logical.CodedError(409, fmt.Sprintf("path is already in use at %s", ent.Path))
}
}
}
// Verify there are no conflicting mounts in the router
if match := c.router.MountConflict(ctx, entry.Path); match != "" {
return logical.CodedError(409, fmt.Sprintf("existing mount at %s", match))
}
// Generate a new UUID and view
if entry.UUID == "" {
entryUUID, err := uuid.GenerateUUID()
if err != nil {
return err
}
entry.UUID = entryUUID
}
if entry.BackendAwareUUID == "" {
bUUID, err := uuid.GenerateUUID()
if err != nil {
return err
}
entry.BackendAwareUUID = bUUID
}
if entry.Accessor == "" {
accessor, err := c.generateMountAccessor(entry.Type)
if err != nil {
return err
}
entry.Accessor = accessor
}
// Sync values to the cache
entry.SyncCache()
// Resolution to absolute storage paths (versus uuid-relative) needs
// to happen prior to calling into the forwarded writer. Thus we
// intercept writes just before they hit barrier storage.
forwarded, err := c.NewForwardedWriter(ctx, c.barrier, entry.Local)
if err != nil {
return fmt.Errorf("error creating forwarded writer: %v", err)
}
viewPath := entry.ViewPath()
view := NewBarrierView(forwarded, viewPath)
// Singleton mounts cannot be filtered manually on a per-secondary basis
// from replication.
if strutil.StrListContains(singletonMounts, entry.Type) {
addFilterablePath(c, viewPath)
}
addKnownPath(c, viewPath)
nilMount, err := preprocessMount(c, entry, view)
if err != nil {
return err
}
origReadOnlyErr := view.getReadOnlyErr()
// Mark the view as read-only until the mounting is complete and
// ensure that it is reset after. This ensures that there will be no
// writes during the construction of the backend.
view.setReadOnlyErr(logical.ErrSetupReadOnly)
// We defer this because we're already up and running so we don't need to
// time it for after postUnseal
defer view.setReadOnlyErr(origReadOnlyErr)
var backend logical.Backend
sysView := c.mountEntrySysView(entry)
backend, entry.RunningSha256, err = c.newLogicalBackend(ctx, entry, sysView, view)
if err != nil {
return err
}
if backend == nil {
return fmt.Errorf("nil backend of type %q returned from creation function", entry.Type)
}
// Check for the correct backend type
backendType := backend.Type()
if backendType != logical.TypeLogical {
if entry.Type != "kv" && entry.Type != "system" && entry.Type != "cubbyhole" {
return fmt.Errorf(`unknown backend type: "%s"`, entry.Type)
}
}
// update the entry running version with the configured version, which was verified during registration.
entry.RunningVersion = entry.Version
if entry.RunningVersion == "" {
// don't set the running version to a builtin if it is running as an external plugin
if entry.RunningSha256 == "" {
entry.RunningVersion = versions.GetBuiltinVersion(consts.PluginTypeSecrets, entry.Type)
}
}
addPathCheckers(c, entry, backend, viewPath)
c.setCoreBackend(entry, backend, view)
// If the mount is filtered or we are on a DR secondary we don't want to
// keep the actual backend running, so we clean it up and set it to nil
// so the router does not have a pointer to the object.
if nilMount {
backend.Cleanup(ctx)
backend = nil
}
newTable := c.mounts.shallowClone()
newTable.Entries = append(newTable.Entries, entry)
if updateStorage {
if err := c.persistMounts(ctx, newTable, &entry.Local); err != nil {
c.logger.Error("failed to update mount table", "error", err)
if err == logical.ErrReadOnly && c.perfStandby {
return err
}
return logical.CodedError(500, "failed to update mount table")
}
}
c.mounts = newTable
if err := c.router.Mount(backend, entry.Path, entry, view); err != nil {
return err
}
// Re-evaluate filtered paths
if err := runFilteredPathsEvaluation(ctx, c, false); err != nil {
c.logger.Error("failed to evaluate filtered paths", "error", err)
unlock()
unlock = func() {}
// We failed to evaluate filtered paths so we are undoing the mount operation
if unmountInternalErr := c.unmountInternal(ctx, entry.Path, MountTableUpdateStorage); unmountInternalErr != nil {
c.logger.Error("failed to unmount", "error", unmountInternalErr)
}
return err
}
if !nilMount {
// restore the original readOnlyErr, so we can write to the view in
// Initialize() if necessary
view.setReadOnlyErr(origReadOnlyErr)
// initialize, using the core's active context.
err := backend.Initialize(c.activeContext, &logical.InitializationRequest{Storage: view})
if err != nil {
return err
}
}
if c.logger.IsInfo() {
c.logger.Info("successful mount", "namespace", entry.Namespace().Path, "path", entry.Path, "type", entry.Type, "version", entry.Version)
}
return nil
}
// builtinTypeFromMountEntry attempts to find a builtin PluginType associated
// with the specified MountEntry. Returns consts.PluginTypeUnknown if not found.
func (c *Core) builtinTypeFromMountEntry(ctx context.Context, entry *MountEntry) consts.PluginType {
if c.builtinRegistry == nil || entry == nil {
return consts.PluginTypeUnknown
}
if !versions.IsBuiltinVersion(entry.RunningVersion) {
return consts.PluginTypeUnknown
}
builtinPluginType := func(name string, pluginType consts.PluginType) (consts.PluginType, bool) {
plugin, err := c.pluginCatalog.Get(ctx, name, pluginType, entry.RunningVersion)
if err == nil && plugin != nil && plugin.Builtin {
return plugin.Type, true
}
return consts.PluginTypeUnknown, false
}
// auth plugins have their own dedicated mount table
if pluginType, err := consts.ParsePluginType(entry.Table); err == nil {
if builtinType, ok := builtinPluginType(entry.Type, pluginType); ok {
return builtinType
}
}
// Check for possible matches
var builtinTypes []consts.PluginType
for _, pluginType := range [...]consts.PluginType{consts.PluginTypeSecrets, consts.PluginTypeDatabase} {
if builtinType, ok := builtinPluginType(entry.Type, pluginType); ok {
builtinTypes = append(builtinTypes, builtinType)
}
}
if len(builtinTypes) == 1 {
return builtinTypes[0]
}
return consts.PluginTypeUnknown
}
// Unmount is used to unmount a path. The boolean indicates whether the mount
// was found.
func (c *Core) unmount(ctx context.Context, path string) error {
// Ensure we end the path in a slash
if !strings.HasSuffix(path, "/") {
path += "/"
}
// Prevent protected paths from being unmounted
for _, p := range protectedMounts {
if strings.HasPrefix(path, p) {
return fmt.Errorf("cannot unmount %q", path)
}
}
// Unmount mount internally
if err := c.unmountInternal(ctx, path, MountTableUpdateStorage); err != nil {
return err
}
// Re-evaluate filtered paths
if err := runFilteredPathsEvaluation(ctx, c, true); err != nil {
// Even we failed to evaluate filtered paths, the unmount operation was still successful
c.logger.Error("failed to evaluate filtered paths", "error", err)
}
return nil
}
func (c *Core) unmountInternal(ctx context.Context, path string, updateStorage bool) error {
ns, err := namespace.FromContext(ctx)
if err != nil {
return err
}
// Verify exact match of the route
match := c.router.MatchingMount(ctx, path)
if match == "" || ns.Path+path != match {
return fmt.Errorf("no matching mount")
}
// Get the view for this backend
view := c.router.MatchingStorageByAPIPath(ctx, path)
// Get the backend/mount entry for this path, used to remove ignored
// replication prefixes
backend := c.router.MatchingBackend(ctx, path)
entry := c.router.MatchingMountEntry(ctx, path)
// Mark the entry as tainted
if err := c.taintMountEntry(ctx, ns.ID, path, updateStorage, true); err != nil {
c.logger.Error("failed to taint mount entry for path being unmounted", "error", err, "path", path)
return err
}
// Taint the router path to prevent routing. Note that in-flight requests
// are uncertain, right now.
if err := c.router.Taint(ctx, path); err != nil {
return err
}
rCtx := namespace.ContextWithNamespace(c.activeContext, ns)
if backend != nil && c.rollback != nil {
// Invoke the rollback manager a final time
if err := c.rollback.Rollback(rCtx, path); err != nil {
return err
}
}
if backend != nil && c.expiration != nil && updateStorage {
// Revoke all the dynamic keys
if err := c.expiration.RevokePrefix(rCtx, path, true); err != nil {
return err
}
}
if backend != nil {
// Call cleanup function if it exists
backend.Cleanup(ctx)
}
viewPath := entry.ViewPath()
switch {
case !updateStorage:
// Don't attempt to clear data, replication will handle this
case c.IsDRSecondary():
// If we are a dr secondary we want to clear the view, but the provided
// view is marked as read only. We use the barrier here to get around
// it.
if err := logical.ClearViewWithLogging(ctx, NewBarrierView(c.barrier, viewPath), c.logger.Named("secrets.deletion").With("namespace", ns.ID, "path", path)); err != nil {
c.logger.Error("failed to clear view for path being unmounted", "error", err, "path", path)
return err
}
case entry.Local, !c.IsPerfSecondary():
// Have writable storage, remove the whole thing
if err := logical.ClearViewWithLogging(ctx, view, c.logger.Named("secrets.deletion").With("namespace", ns.ID, "path", path)); err != nil {
c.logger.Error("failed to clear view for path being unmounted", "error", err, "path", path)
return err
}
case !entry.Local && c.IsPerfSecondary():
if err := clearIgnoredPaths(ctx, c, backend, viewPath); err != nil {
return err
}
}
// Remove the mount table entry
if err := c.removeMountEntry(ctx, path, updateStorage); err != nil {
c.logger.Error("failed to remove mount entry for path being unmounted", "error", err, "path", path)
return err
}
// Unmount the backend entirely
if err := c.router.Unmount(ctx, path); err != nil {
return err
}
removePathCheckers(c, entry, viewPath)
if c.quotaManager != nil {
if err := c.quotaManager.HandleBackendDisabling(ctx, ns.Path, path); err != nil {
c.logger.Error("failed to update quotas after disabling mount", "path", path, "error", err)
return err
}
}
if c.logger.IsInfo() {
c.logger.Info("successfully unmounted", "path", path, "namespace", ns.Path)
}
return nil
}
// removeMountEntry is used to remove an entry from the mount table
func (c *Core) removeMountEntry(ctx context.Context, path string, updateStorage bool) error {
c.mountsLock.Lock()
defer c.mountsLock.Unlock()
// Remove the entry from the mount table
newTable := c.mounts.shallowClone()
entry, err := newTable.remove(ctx, path)
if err != nil {
return err
}
if entry == nil {
c.logger.Error("nil entry found removing entry in mounts table", "path", path)
return logical.CodedError(500, "failed to remove entry in mounts table")
}
// When unmounting all entries the JSON code will load back up from storage
// as a nil slice, which kills tests...just set it nil explicitly
if len(newTable.Entries) == 0 {
newTable.Entries = nil
}
if updateStorage {
// Update the mount table
if err := c.persistMounts(ctx, newTable, &entry.Local); err != nil {
c.logger.Error("failed to remove entry from mounts table", "error", err)
return logical.CodedError(500, "failed to remove entry from mounts table")
}
}
c.mounts = newTable
return nil
}
// taintMountEntry is used to mark an entry in the mount table as tainted
func (c *Core) taintMountEntry(ctx context.Context, nsID, mountPath string, updateStorage, unmounting bool) error {
c.mountsLock.Lock()
defer c.mountsLock.Unlock()
mountState := ""
if unmounting {
mountState = mountStateUnmounting
}
// As modifying the taint of an entry affects shallow clones,
// we simply use the original
entry, err := c.mounts.setTaint(nsID, mountPath, true, mountState)
if err != nil {
return err
}
if entry == nil {
c.logger.Error("nil entry found tainting entry in mounts table", "path", mountPath)
return logical.CodedError(500, "failed to taint entry in mounts table")
}
if updateStorage {
// Update the mount table
if err := c.persistMounts(ctx, c.mounts, &entry.Local); err != nil {
if err == logical.ErrReadOnly && c.perfStandby {
return err
}
c.logger.Error("failed to taint entry in mounts table", "error", err)
return logical.CodedError(500, "failed to taint entry in mounts table")
}
}