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Go
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160package knotserver
import ( "context" "fmt" "os" "syscall"
"github.com/urfave/cli/v3" "tangled.org/core/hook" "tangled.org/core/knotserver/db" "tangled.org/core/knotserver/sandbox" "tangled.org/core/log")
// MigrateIsolationCommand returns the CLI command for migrate-isolation.func MigrateIsolationCommand() *cli.Command { return &cli.Command{ Name: "migrate-isolation", Usage: "chown existing repos to their owner virtual UIDs and refresh hooks (run once before enabling --secure-mode)", Action: RunMigrateIsolation, Flags: []cli.Flag{ &cli.StringFlag{ Name: "git-dir", Usage: "base directory for git repos", Value: "/home/git", }, &cli.StringFlag{ Name: "db", Usage: "path to knotserver SQLite database", Value: "knotserver.db", }, &cli.StringFlag{ Name: "internal-api", Usage: "internal API address for hook configuration", Value: "127.0.0.1:5444", }, &cli.BoolFlag{ Name: "force", Usage: "re-run chown/chmod even on already-migrated repos", }, }, }}
// RunMigrateIsolation iterates over all repos in the DB, assigns virtual UIDs// to their owners, chowns the repo trees recursively, and records isolated_at.func RunMigrateIsolation(ctx context.Context, cmd *cli.Command) error { logger := log.FromContext(ctx) logger = log.SubLogger(logger, "migrate-isolation")
gitDir := cmd.String("git-dir") dbPath := cmd.String("db") internalApi := cmd.String("internal-api")
serviceGid, err := sandbox.ServiceGid(gitDir) if err != nil { return fmt.Errorf("resolve service gid: %w", err) }
hookCfg := hook.Config( hook.WithScanPath(gitDir), hook.WithInternalApi(internalApi), )
d, err := db.Setup(ctx, dbPath) if err != nil { return fmt.Errorf("failed to open db: %w", err) }
repos, err := d.AllReposForMigration(cmd.Bool("force")) if err != nil { return fmt.Errorf("failed to list repos: %w", err) }
if len(repos) == 0 { logger.Info("no repos need migration") return nil }
logger.Info("starting isolation migration", "total", len(repos))
var migrated, skipped, failed int
for _, repo := range repos { repoPath, _, _, err := d.ResolveRepoDIDOnDisk(gitDir, repo.RepoDID) if err != nil { logger.Error("repo not on disk, skipping", "repo_did", repo.RepoDID, "error", err) skipped++ continue }
ownerUID, err := d.GetOrAssignOwnerUID(repo.OwnerDID) if err != nil { logger.Error("failed to get/assign UID", "repo_did", repo.RepoDID, "owner_did", repo.OwnerDID, "error", err) failed++ continue }
// regenerate hooks first so the chown walk preserves their 0755 mode // via the executable-bit check in ChownRepoTree. if err := hook.SetupRepo(hookCfg, repoPath); err != nil { logger.Error("failed to set up hooks", "repo_did", repo.RepoDID, "path", repoPath, "error", err) failed++ continue }
if err := sandbox.ChmodRepoTree(repoPath); err != nil { logger.Error("chmod failed", "repo_did", repo.RepoDID, "path", repoPath, "error", err) failed++ continue }
if err := sandbox.ChownRepoTree(repoPath, int(ownerUID), int(serviceGid)); err != nil { // EPERM: process lacks cap_chown; log and continue rather than // aborting so all failures are reported. if isEPERM(err) { logger.Error("chown failed: process lacks cap_chown "+ "(run as root or grant cap_chown to the binary)", "repo_did", repo.RepoDID, "path", repoPath, "uid", ownerUID) } else { logger.Error("chown failed", "repo_did", repo.RepoDID, "path", repoPath, "uid", ownerUID, "error", err) } failed++ continue }
if err := d.MarkRepoIsolated(repo.RepoDID); err != nil { logger.Error("failed to record isolated_at", "repo_did", repo.RepoDID, "error", err) failed++ continue }
logger.Info("migrated repo", "repo_did", repo.RepoDID, "owner_did", repo.OwnerDID, "uid", ownerUID, "path", repoPath) migrated++ }
logger.Info("migration complete", "migrated", migrated, "skipped", skipped, "failed", failed, "total", len(repos))
if failed > 0 { return fmt.Errorf("%d repo(s) failed to migrate", failed) } return nil}
func isEPERM(err error) bool { if pathErr, ok := err.(*os.PathError); ok { return pathErr.Err == syscall.EPERM } return false}