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acl.go
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acl.go
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//
// (C) Copyright 2021-2024 Intel Corporation.
//
// SPDX-License-Identifier: BSD-2-Clause-Patent
//
package main
/*
#include "util.h"
void
free_ace_list(char **str, size_t str_count)
{
int i;
for (i = 0; i < str_count; i++)
D_FREE(str[i]);
D_FREE(str);
}
*/
import "C"
import (
"fmt"
"io"
"os"
"strings"
"unsafe"
"github.com/pkg/errors"
"github.com/daos-stack/daos/src/control/lib/control"
)
func getAclStrings(e *C.struct_daos_prop_entry) (out []string) {
acl := (*C.struct_daos_acl)(C.get_dpe_val_ptr(e))
if acl == nil {
return
}
var aces **C.char
var acesNr C.size_t
rc := C.daos_acl_to_strs(acl, &aces, &acesNr)
if err := daosError(rc); err != nil || aces == nil {
return
}
defer C.free_ace_list(aces, acesNr)
for _, ace := range (*[1 << 30]*C.char)(unsafe.Pointer(aces))[:acesNr:acesNr] {
out = append(out, C.GoString(ace))
}
return
}
func aclStringer(e *C.struct_daos_prop_entry, name string) string {
if e == nil {
return propNotFound(name)
}
return strings.Join(getAclStrings(e), ", ")
}
func getContAcl(hdl C.daos_handle_t) ([]*property, func(), error) {
expPropNr := 3 // ACL, user, group
var props *C.daos_prop_t
rc := C.daos_cont_get_acl(hdl, &props, nil)
if err := daosError(rc); err != nil {
return nil, nil, err
}
if props.dpp_nr != C.uint(expPropNr) {
return nil, nil, errors.Errorf("invalid number of ACL props (%d != %d)",
props.dpp_nr, expPropNr)
}
entries := createPropSlice(props, expPropNr)
outProps := make([]*property, len(entries))
for i, entry := range entries {
switch entry.dpe_type {
case C.DAOS_PROP_CO_ACL:
outProps[i] = &property{
entry: &entries[i],
toString: aclStringer,
Name: "acl",
Description: "Access Control List",
}
case C.DAOS_PROP_CO_OWNER:
outProps[i] = &property{
entry: &entries[i],
toString: strValStringer,
Name: "user",
Description: "User",
}
case C.DAOS_PROP_CO_OWNER_GROUP:
outProps[i] = &property{
entry: &entries[i],
toString: strValStringer,
Name: "group",
Description: "Group",
}
}
}
return outProps, func() { C.daos_prop_free(props) }, nil
}
type aclCmd struct {
existingContainerCmd
}
func (cmd *aclCmd) getACL(ap *C.struct_cmd_args_s) (*control.AccessControlList, error) {
props, cleanup, err := getContAcl(ap.cont)
if err != nil {
return nil, err
}
defer cleanup()
return convertACLProps(props), nil
}
func (cmd *aclCmd) outputACL(out io.Writer, acl *control.AccessControlList, verbose bool) error {
if cmd.JSONOutputEnabled() {
return cmd.OutputJSON(acl, nil)
}
_, err := fmt.Fprint(out, control.FormatACL(acl, verbose))
return err
}
type containerOverwriteACLCmd struct {
aclCmd
File string `long:"acl-file" short:"f" required:"1"`
}
func (cmd *containerOverwriteACLCmd) Execute(args []string) error {
ap, deallocCmdArgs, err := allocCmdArgs(cmd.Logger)
if err != nil {
return err
}
defer deallocCmdArgs()
cleanup, err := cmd.resolveAndConnect(C.DAOS_COO_RW, ap)
if err != nil {
return err
}
defer cleanup()
cACL, cleanupACL, err := aclFileToC(cmd.File)
if err != nil {
return err
}
defer cleanupACL()
rc := C.daos_cont_overwrite_acl(ap.cont, cACL, nil)
if err := daosError(rc); err != nil {
return errors.Wrapf(err,
"failed to overwrite ACL for container %s",
cmd.ContainerID())
}
acl, err := cmd.getACL(ap)
if err != nil {
return errors.Wrap(err, "unable to fetch updated ACL")
}
return cmd.outputACL(os.Stdout, acl, false)
}
func aclFileToC(aclFile string) (*C.struct_daos_acl, func(), error) {
acl, err := control.ReadACLFile(aclFile)
if err != nil {
return nil, nil, err
}
return aclToC(acl)
}
func aclToC(acl *control.AccessControlList) (*C.struct_daos_acl, func(), error) {
aceStrs := make([]*C.char, len(acl.Entries))
for i, ace := range acl.Entries {
aceStrs[i] = C.CString(ace)
defer C.free(unsafe.Pointer(aceStrs[i]))
}
var cACL *C.struct_daos_acl
rc := C.daos_acl_from_strs(&aceStrs[0], C.ulong(len(aceStrs)), &cACL)
if err := daosError(rc); err != nil {
return nil, nil, errors.Wrapf(err,
"unable to create ACL structure")
}
return cACL, func() { C.daos_acl_free(cACL) }, nil
}
type containerUpdateACLCmd struct {
aclCmd
Entry string `long:"entry" short:"e"`
File string `long:"acl-file" short:"f"`
}
func (cmd *containerUpdateACLCmd) Execute(args []string) error {
var cACL *C.struct_daos_acl
var cleanupACL func()
var err error
switch {
case cmd.Entry != "" && cmd.File != "":
return errors.New("only one of --entry or --acl-file may be supplied")
case cmd.Entry != "":
acl := &control.AccessControlList{
Entries: []string{cmd.Entry},
}
cACL, cleanupACL, err = aclToC(acl)
case cmd.File != "":
cACL, cleanupACL, err = aclFileToC(cmd.File)
default:
return errors.New("one of --entry or --acl-file must be supplied")
}
if err != nil {
return err
}
defer cleanupACL()
ap, deallocCmdArgs, err := allocCmdArgs(cmd.Logger)
if err != nil {
return err
}
defer deallocCmdArgs()
cleanup, err := cmd.resolveAndConnect(C.DAOS_COO_RW, ap)
if err != nil {
return err
}
defer cleanup()
rc := C.daos_cont_update_acl(ap.cont, cACL, nil)
if err := daosError(rc); err != nil {
return errors.Wrapf(err,
"failed to update ACL for container %s",
cmd.ContainerID())
}
acl, err := cmd.getACL(ap)
if err != nil {
return errors.Wrap(err, "unable to fetch updated ACL")
}
return cmd.outputACL(os.Stdout, acl, false)
}
type containerDeleteACLCmd struct {
aclCmd
Principal string `long:"principal" short:"P" required:"1"`
}
func (cmd *containerDeleteACLCmd) Execute(args []string) error {
ap, deallocCmdArgs, err := allocCmdArgs(cmd.Logger)
if err != nil {
return err
}
defer deallocCmdArgs()
cleanup, err := cmd.resolveAndConnect(C.DAOS_COO_RW, ap)
if err != nil {
return err
}
defer cleanup()
cPrincipal := C.CString(cmd.Principal)
defer C.free(unsafe.Pointer(cPrincipal))
var cType C.enum_daos_acl_principal_type
var cName *C.char
rc := C.daos_acl_principal_from_str(cPrincipal, &cType, &cName)
if err := daosError(rc); err != nil {
return errors.Wrapf(err, "unable to parse principal string %q", cmd.Principal)
}
rc = C.daos_cont_delete_acl(ap.cont, cType, cName, nil)
if err := daosError(rc); err != nil {
return errors.Wrapf(err,
"failed to delete ACL for container %s",
cmd.ContainerID())
}
acl, err := cmd.getACL(ap)
if err != nil {
return errors.Wrap(err, "unable to fetch updated ACL")
}
return cmd.outputACL(os.Stdout, acl, false)
}
func convertACLProps(props []*property) (acl *control.AccessControlList) {
acl = new(control.AccessControlList)
for _, prop := range props {
switch prop.entry.dpe_type {
case C.DAOS_PROP_CO_ACL:
acl.Entries = strings.Split(prop.toString(prop.entry, "acls"), ", ")
case C.DAOS_PROP_CO_OWNER:
acl.Owner = prop.toString(prop.entry, "owner")
case C.DAOS_PROP_CO_OWNER_GROUP:
acl.OwnerGroup = prop.toString(prop.entry, "group")
}
}
return
}
type containerGetACLCmd struct {
aclCmd
File string `long:"outfile" short:"O" description:"write ACL to file"`
Force bool `long:"force" short:"f" description:"overwrite existing outfile"`
Verbose bool `long:"verbose" short:"V" description:"show verbose output"`
}
func (cmd *containerGetACLCmd) Execute(args []string) error {
ap, deallocCmdArgs, err := allocCmdArgs(cmd.Logger)
if err != nil {
return err
}
defer deallocCmdArgs()
cleanup, err := cmd.resolveAndConnect(C.DAOS_COO_RO, ap)
if err != nil {
return err
}
defer cleanup()
acl, err := cmd.getACL(ap)
if err != nil {
return errors.Wrapf(err, "failed to query ACL for container %s", cmd.contUUID)
}
output := os.Stdout
if cmd.File != "" {
flags := os.O_CREATE | os.O_WRONLY
if !cmd.Force {
flags |= os.O_EXCL
}
output, err = os.OpenFile(cmd.File, flags, 0644)
if err != nil {
return errors.Wrap(err,
"failed to open ACL output file")
}
defer output.Close()
}
return cmd.outputACL(output, acl, cmd.Verbose)
}
type containerSetOwnerCmd struct {
existingContainerCmd
User string `long:"user" short:"u" description:"user who will own the container"`
Group string `long:"group" short:"g" description:"group who will own the container"`
}
func (cmd *containerSetOwnerCmd) Execute(args []string) error {
if cmd.User == "" && cmd.Group == "" {
return errors.New("at least one of user or group must be supplied")
}
ap, deallocCmdArgs, err := allocCmdArgs(cmd.Logger)
if err != nil {
return err
}
defer deallocCmdArgs()
cleanup, err := cmd.resolveAndConnect(C.DAOS_COO_RW, ap)
if err != nil {
return err
}
defer cleanup()
var user *C.char
var group *C.char
if cmd.User != "" {
if !strings.ContainsRune(cmd.User, '@') {
cmd.User += "@"
}
user = C.CString(cmd.User)
defer C.free(unsafe.Pointer(user))
}
if cmd.Group != "" {
if !strings.ContainsRune(cmd.Group, '@') {
cmd.Group += "@"
}
group = C.CString(cmd.Group)
defer C.free(unsafe.Pointer(group))
}
props, entries, err := allocProps(3)
if err != nil {
return err
}
entries[0].dpe_type = C.DAOS_PROP_CO_LAYOUT_TYPE
props.dpp_nr++
defer func() { C.daos_prop_free(props) }()
rc := C.daos_cont_query(cmd.cContHandle, nil, props, nil)
if err := daosError(rc); err != nil {
return errors.Wrapf(err, "failed to query container %s", cmd.ContainerID())
}
lType := C.get_dpe_val(&entries[0])
if lType == C.DAOS_PROP_CO_LAYOUT_POSIX {
if err := dfsError(C.dfs_cont_set_owner(ap.cont, user, group)); err != nil {
return errors.Wrapf(err, "%s failed", fsOpString((ap.fs_op)))
}
} else {
rc := C.daos_cont_set_owner(ap.cont, user, group, nil)
if err := daosError(rc); err != nil {
return errors.Wrapf(err, "failed to set owner for container %s",
cmd.ContainerID())
}
}
if cmd.JSONOutputEnabled() {
return cmd.OutputJSON(nil, nil)
}
var contID string
if cmd.ContainerID().Empty() {
contID = cmd.Path
} else {
contID = cmd.ContainerID().String()
}
cmd.Infof("Successfully set owner for container %s", contID)
return nil
}