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incusd/storage: Fix squashfs unpacking to NFS destinations #2149

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Merged
stgraber merged 1 commit into from
May 27, 2025
Merged

incusd/storage: Fix squashfs unpacking to NFS destinations #2149

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10 changes: 10 additions & 0 deletions internal/linux/filesystem.go
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Original file line number Diff line number Diff line change
Expand Up @@ -42,6 +42,16 @@ func DetectFilesystem(path string) (string, error) {
return FSTypeToName(int32(fs.Type))
}

// IsNFS returns true if the path exists and is on a NFS mount.
func IsNFS(path string) bool {
backingFs, err := DetectFilesystem(path)
if err != nil {
return false
}

return backingFs == "nfs"
}

// FSTypeToName returns the name of the given fs type.
// The fsType is from the Type field of unix.Statfs_t. We use int32 so that this function behaves the same on both
// 32bit and 64bit platforms by requiring any 64bit FS types to be overflowed before being passed in. They will
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8 changes: 8 additions & 0 deletions shared/archive/archive.go
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Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,7 @@ import (

"golang.org/x/sys/unix"

"github.com/lxc/incus/v6/internal/linux"
"github.com/lxc/incus/v6/shared/ioprogress"
"github.com/lxc/incus/v6/shared/logger"
"github.com/lxc/incus/v6/shared/subprocess"
Expand Down Expand Up @@ -200,6 +201,13 @@ func Unpack(file string, path string, blockBackend bool, maxMemory int64, tracke
}
}

// NFS 4.2 can support xattrs, but not security.xattr.
if linux.IsNFS(path) {
logger.Warn("Unpack: destination path is NFS, disabling non-user xatttr unpacking", logger.Ctx{"file": file, "command": command, "extension": extension, "path": path, "args": args})

args = append(args, "-user-xattrs")
}

args = append(args, file)
} else {
return fmt.Errorf("Unsupported image format: %s", extension)
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