mirror of
https://github.com/ceph/ceph-csi.git
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445c6e3638
By reading the contents of /proc/filesystems, and checking if "ceph" is
included there, running "modprobe ceph" can be skipped.
Fixes: #4376
Signed-off-by: Niels de Vos <ndevos@ibm.com>
(cherry picked from commit ab87045afb)
140 lines
3.5 KiB
Go
140 lines
3.5 KiB
Go
/*
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Copyright 2021 The Ceph-CSI Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package mounter
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import (
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"context"
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"fmt"
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"os"
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"strings"
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"github.com/ceph/ceph-csi/internal/cephfs/store"
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"github.com/ceph/ceph-csi/internal/util"
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)
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const (
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volumeMounterKernel = "kernel"
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netDev = "_netdev"
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kernelModule = "ceph"
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)
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// testErrorf can be set by unit test for enhanced error reporting.
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var testErrorf = func(fmt string, args ...any) { /* do nothing */ }
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type KernelMounter interface {
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Mount(
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ctx context.Context,
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mountPoint string,
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cr *util.Credentials,
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volOptions *store.VolumeOptions,
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) error
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Name() string
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}
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type kernelMounter struct {
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// needsModprobe indicates that the ceph kernel module is not loaded in
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// the kernel yet (or compiled into it)
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needsModprobe bool
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}
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func NewKernelMounter() KernelMounter {
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return &kernelMounter{
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needsModprobe: !filesystemSupported(kernelModule),
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}
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}
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func (m *kernelMounter) mountKernel(
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ctx context.Context,
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mountPoint string,
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cr *util.Credentials,
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volOptions *store.VolumeOptions,
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) error {
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if m.needsModprobe {
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if err := execCommandErr(ctx, "modprobe", kernelModule); err != nil {
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return err
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}
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m.needsModprobe = false
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}
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args := []string{
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"-t", "ceph",
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fmt.Sprintf("%s:%s", volOptions.Monitors, volOptions.RootPath),
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mountPoint,
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}
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optionsStr := fmt.Sprintf("name=%s,secretfile=%s", cr.ID, cr.KeyFile)
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mdsNamespace := ""
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if volOptions.FsName != "" {
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mdsNamespace = fmt.Sprintf("mds_namespace=%s", volOptions.FsName)
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}
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optionsStr = util.MountOptionsAdd(optionsStr, mdsNamespace, volOptions.KernelMountOptions, netDev)
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args = append(args, "-o", optionsStr)
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var (
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stderr string
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err error
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)
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if volOptions.NetNamespaceFilePath != "" {
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_, stderr, err = util.ExecuteCommandWithNSEnter(ctx, volOptions.NetNamespaceFilePath, "mount", args[:]...)
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} else {
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_, stderr, err = util.ExecCommand(ctx, "mount", args[:]...)
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}
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if err != nil {
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return fmt.Errorf("%w stderr: %s", err, stderr)
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}
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return err
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}
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func (m *kernelMounter) Mount(
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ctx context.Context,
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mountPoint string,
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cr *util.Credentials,
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volOptions *store.VolumeOptions,
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) error {
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if err := util.CreateMountPoint(mountPoint); err != nil {
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return err
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}
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return m.mountKernel(ctx, mountPoint, cr, volOptions)
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}
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func (m *kernelMounter) Name() string { return "Ceph kernel client" }
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// filesystemSupported checks if the passed name of the filesystem is included
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// in /proc/filesystems.
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func filesystemSupported(fs string) bool {
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// /proc/filesystems contains a list of all supported filesystems,
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// either compiled into the kernel, or as loadable module.
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data, err := os.ReadFile("/proc/filesystems")
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if err != nil {
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testErrorf("failed to read /proc/filesystems: %v", err)
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return false
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}
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// The format of /proc/filesystems is one filesystem per line, an
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// optional keyword ("nodev") followed by a tab and the name of the
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// filesystem. Matching <tab>ceph<eol> for the ceph kernel module that
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// supports CephFS.
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return strings.Contains(string(data), "\t"+fs+"\n")
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}
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