sysinfo: print file system of datadir

fixes #3098

Signed-off-by: Natanael Copa <[email protected]>

internal/pkg/sysinfo/probes/filesystem.go

@@ -0,0 +1,37 @@
+/*
+Copyright 2024 k0s authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package probes
+
+import (
+	"fmt"
+)
+
+// AssertFileSystem asserts a minimum amount of free disk space.
+func AssertFileSystem(parent ParentProbe, fsPath string) {
+	parent.Set("filesystem:"+fsPath, func(path ProbePath, current Probe) Probe {
+		return &assertFileSystem{path, fsPath}
+	})
+}
+
+type assertFileSystem struct {
+	path   ProbePath
+	fsPath string
+}
+
+func (a *assertFileSystem) desc() ProbeDesc {
+	return NewProbeDesc(fmt.Sprintf("File system of %s", a.fsPath), a.path)
+}

internal/pkg/sysinfo/probes/filesystem_linux.go

@@ -0,0 +1,132 @@
+/*
+Copyright 2024 k0s authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package probes
+
+import (
+	"os"
+	"path"
+
+	"golang.org/x/sys/unix"
+)
+
+func (a *assertFileSystem) Probe(reporter Reporter) error {
+	// https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/plain/include/uapi/linux/magic.h
+	fsTypes := map[int64]string{
+		0xadf5:     "adfs",
+		0xadff:     "affs",
+		0x5346414f: "afs",
+		0x0187:     "autofs",
+		0x00c36400: "ceph",
+		0x73757245: "coda",
+		0x28cd3d45: "cramfs",
+		0x453dcd28: "cramfs (wrong endian)",
+		0x64626720: "debugfs",
+		0x73636673: "securityfs",
+		0xf97cff8c: "selinux",
+		0x43415d53: "smack",
+		0x858458f6: "ramfs",
+		0x01021994: "tmpfs",
+		0x958458f6: "hugetlbfs",
+		0x73717368: "squashfs",
+		0xf15f:     "ecryptfs",
+		0x414a53:   "efs",
+		0xe0f5e1e2: "erofs v1",
+		0xabba1974: "xenfs",
+		0xef53:     "ext4",
+		0x9123683e: "btrfs",
+		0x3434:     "nilfs",
+		0xf2f52010: "f2fs",
+		0xf995e849: "hpfs",
+		0x9660:     "isofs",
+		0x72b6:     "jffs2",
+		0x58465342: "xfs",
+		0x6165676c: "pstore",
+		0xde5e81e4: "efivarfs",
+		0x00c0ffee: "hostfs",
+		0x794c7630: "overlayfs",
+		0x65735546: "fuse",
+		0xca451a4e: "bcachefs",
+		0x137f:     "minix",
+		0x138f:     "minix (30 char names)",
+		0x2468:     "minix v2",
+		0x2478:     "minix v2 (30 char names)",
+		0x4d5a:     "minix v3",
+		0x4d44:     "msdos",
+		0x2011bab0: "exfat",
+		0x564c:     "ncp",
+		0x6969:     "nfs",
+		0x7461636f: "ocfs2",
+		0x9fa1:     "openprom",
+		0x002f:     "qnx4",
+		0x68191122: "qnx6",
+		0x6b414653: "afs",
+		0x52654973: "reiserfs",
+		0x517b:     "smb",
+		0xff534d42: "cifs",
+		0xfe534d42: "smb2",
+		0x27e0eb:   "cgroup",
+		0x63677270: "cgroup2",
+		0x7655821:  "rdtgroup",
+		0x57ac6e9d: "stack_end",
+		0x74726163: "tracefs",
+		0x01021997: "v9fs",
+		0x62646576: "bdevfs",
+		0x64646178: "daxfs",
+		0x42494e4d: "binfmtfs",
+		0x1cd1:     "devpts",
+		0x6c6f6f70: "binderfs",
+		0xbad1dea:  "futexfs",
+		0x50495045: "pipefs",
+		0x9fa0:     "proc",
+		0x534f434b: "sockfs",
+		0x62656572: "sysfs",
+		0x9fa2:     "usbdevice",
+		0x11307854: "mtd_inode_fs",
+		0x09041934: "anon_inode_fs",
+		0x73727279: "btrfs_test",
+		0x6e736673: "nsfs",
+		0xcafe4a11: "bpf_fs",
+		0x5a3c69f0: "aafs",
+		0x5a4f4653: "zonefs",
+		0x15013346: "udf",
+		0x444d4142: "dma_buf",
+		0x454d444d: "devmem",
+		0x5345434d: "secretmem",
+		0x50494446: "pid_fs",
+	}
+
+	var stat unix.Statfs_t
+	for p := a.fsPath; ; {
+		if err := unix.Statfs(p, &stat); err != nil {
+			if os.IsNotExist(err) {
+				if parent := path.Dir(p); parent != p {
+					p = parent
+					continue
+				}
+			}
+			return reporter.Error(a.desc(), err)
+		}
+
+		break
+	}
+
+	fs, found := fsTypes[stat.Type]
+	if !found {
+		fs = "unknown"
+	}
+	return reporter.Pass(a.desc(), StringProp(fs))
+}

internal/pkg/sysinfo/probes/filesystem_other.go

@@ -0,0 +1,23 @@
+//go:build !linux
+
+/*
+Copyright 2024 k0s authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package probes
+
+func (a *assertFileSystem) Probe(reporter Reporter) error {
+	return reporter.Warn(a.desc(), probeUnsupported("Filesystem detection unsupported on this platform"), "")
+}

internal/pkg/sysinfo/sysinfo.go

@@ -71,6 +71,7 @@ func (s *K0sSysinfoSpec) NewSysinfoProbes() probes.Probes {
 		minFreeDiskSpace = minFreeDiskSpace + 1300*probes.Mi
 	}
 	probes.AssertFreeDiskSpace(p, s.DataDir, minFreeDiskSpace)
+	probes.AssertFileSystem(p, s.DataDir)
 	probes.RequireNameResolution(p, net.LookupIP, "localhost")
 
 	s.addHostSpecificProbes(p)