fixed more lock/transaction issues

backend/internal/db/block-extras.go

@@ -533,8 +533,8 @@ func (s *Store) DeleteBlockAttachment(ctx context.Context, boardID, blockID, att
 	}
 	err = scanBlockAttachment(
 		tx.QueryRow(`SELECT`+blockAttachmentSelectCols+blockAttachmentSelectFrom+`
-		JOIN boards brd ON brd.id = bl.board_id
+			JOIN boards brd ON brd.id = bl.board_id
-		WHERE brd.public_id = ? AND bl.public_id = ? AND bl.delete_at = 0 AND ba.public_id = ? AND ba.delete_at = 0`,
+			WHERE brd.public_id = ? AND bl.public_id = ? AND bl.delete_at = 0 AND ba.public_id = ? AND ba.delete_at = 0`,
 			boardID, blockID, attachmentID),
 		&item)
 	if err == sql.ErrNoRows {
@@ -570,10 +570,9 @@ func (s *Store) DeleteBlockAttachment(ctx context.Context, boardID, blockID, att
 		return item, ErrBlockAttachmentNotFound
 	}
 	item.DeleteAt = now
+
 	err = commitIfOwned(tx, owned)
-	if err != nil {
+	if err != nil { return item, err }
-		return item, err
-	}
 	return item, nil
 }
 

backend/internal/db/db.go

@@ -8,6 +8,9 @@ import "os"
 import "path/filepath"
 import "sort"
 import "strings"
+import "time"
+
+const IndependentDBOperationTimeout = 10 * time.Second
 
 type sqlExecutor interface {
 	Exec(query string, args ...any) (sql.Result, error)

backend/internal/docker/registry.go

@@ -16,6 +16,7 @@ import "codit/config"
 import "codit/internal/db"
 import "codit/internal/middleware"
 import "codit/internal/models"
+import "codit/internal/repolock"
 import "codit/internal/util"
 import codit_logger "codit/logger"
 
@@ -27,17 +28,19 @@ type HTTPServer struct {
 	auth    AuthFunc
 	logger  codit_logger.Logger
 	prefix  string
+	locks   *repolock.Manager
 }
 
 const logIDDocker string = "docker"
 
-func NewHTTPServer(store *db.Store, baseDir string, auth AuthFunc, logger codit_logger.Logger, prefix string) *HTTPServer {
+func NewHTTPServer(store *db.Store, baseDir string, auth AuthFunc, logger codit_logger.Logger, prefix string, locks *repolock.Manager) *HTTPServer {
 	return &HTTPServer{
 		store:   store,
 		baseDir: baseDir,
 		auth:    auth,
 		logger:  logger,
 		prefix:  config.NormalizeHTTPPrefix(prefix, "/v2"),
+		locks:   locks,
 	}
 }
 
@@ -107,6 +110,8 @@ func (s *HTTPServer) handle(w http.ResponseWriter, r *http.Request) *http.Reques
 	var project models.Project
 	var imageName string
 	var imagePath string
+	var unlock func()
+	var locked bool
 	var err error
 	path = r.URL.Path
 	store = s.requestStore(r)
@@ -128,6 +133,14 @@ func (s *HTTPServer) handle(w http.ResponseWriter, r *http.Request) *http.Reques
 		w.WriteHeader(http.StatusNotFound)
 		return r
 	}
+	if s.isWriteRequest(action, r.Method) {
+		unlock, locked = s.tryLockRepo(repo.ID)
+		if !locked {
+			w.WriteHeader(http.StatusConflict)
+			return r
+		}
+		defer unlock()
+	}
 	r = WithRequestLogInfo(r, RequestLogInfo{
 		OrgPath:     path,
 		ProjectID:   project.ID,
@@ -153,6 +166,20 @@ func (s *HTTPServer) handle(w http.ResponseWriter, r *http.Request) *http.Reques
 	return r
 }
 
+func (s *HTTPServer) tryLockRepo(repoID string) (func(), bool) {
+	if s.locks == nil { return func() {}, true }
+	return s.locks.TryLock(repoID)
+}
+
+func (s *HTTPServer) isWriteRequest(action string, method string) bool {
+	if action == "manifest" && method == http.MethodPut { return true }
+	if action == "upload_start" && method == http.MethodPost { return true }
+	if action == "upload" {
+		if method == http.MethodPatch || method == http.MethodPut || method == http.MethodDelete { return true }
+	}
+	return false
+}
+
 func (s *HTTPServer) requestStore(r *http.Request) *db.Store {
 	var store *db.Store
 	var ok bool

backend/internal/handlers/api.go

@@ -28,6 +28,7 @@ import "codit/internal/git"
 import "codit/internal/middleware"
 import "codit/internal/models"
 import "codit/internal/rpm"
+import "codit/internal/repolock"
 import "codit/internal/storage"
 import "codit/internal/util"
 import codit_logger "codit/logger"
@@ -46,6 +47,7 @@ type APIOptions struct {
 	Logger                     codit_logger.Logger
 	OnTLSListenersChanged      func()
 	OnTLSListenerRuntimeStatus func() map[string]int
+	RepoLocks                  *repolock.Manager
 }
 
 type API struct {
@@ -68,6 +70,7 @@ type API struct {
 	SSHPreparedSessionStore    *SSHPreparedSessionStore
 	OnTLSListenersChanged      func()
 	OnTLSListenerRuntimeStatus func() map[string]int
+	RepoLocks                  *repolock.Manager
 }
 
 type appInfoResponse struct {
@@ -104,10 +107,28 @@ func NewAPI(options APIOptions) *API {
 		SSHPreparedSessionStore:    NewSSHPreparedSessionStore(),
 		OnTLSListenersChanged:      options.OnTLSListenersChanged,
 		OnTLSListenerRuntimeStatus: options.OnTLSListenerRuntimeStatus,
+		RepoLocks:                  options.RepoLocks,
 	}
+	if api.RepoLocks == nil { api.RepoLocks = repolock.NewManager() }
 	return api
 }
 
+func (api *API) lockRepo(repoID string) func() {
+	return api.RepoLocks.Lock(repoID)
+}
+
+func (api *API) lockRepos(repoIDs []string) func() {
+	return api.RepoLocks.LockMany(repoIDs)
+}
+
+func (api *API) tryLockRepo(repoID string) (func(), bool) {
+	return api.RepoLocks.TryLock(repoID)
+}
+
+func (api *API) tryLockRepos(repoIDs []string) (func(), bool) {
+	return api.RepoLocks.TryLockMany(repoIDs)
+}
+
 func (api *API) serverId() string {
 	return config.NormalizeServerId(api.ServerId)
 }
@@ -890,6 +911,7 @@ func (api *API) UploadMyAvatar(w http.ResponseWriter, r *http.Request, _ map[str
 	var copied int64
 	var ts string
 	var closeErr error
+	var txStore *db.Store
 
 	ctxUser, ok = middleware.UserFromContext(r.Context())
 	if !ok {
@@ -930,9 +952,7 @@ func (api *API) UploadMyAvatar(w http.ResponseWriter, r *http.Request, _ map[str
 	}
 	copied, err = io.Copy(out, file)
 	closeErr = out.Close()
-	if err == nil {
+	if err == nil { err = closeErr }
-		err = closeErr
-	}
 	if err != nil {
 		_ = os.Remove(tempPath)
 		WriteJSONWithErrorReason(w, r, http.StatusInternalServerError, err.Error())
@@ -949,21 +969,44 @@ func (api *API) UploadMyAvatar(w http.ResponseWriter, r *http.Request, _ map[str
 		WriteJSONWithErrorReason(w, r, http.StatusInternalServerError, err.Error())
 		return
 	}
-	oldAvatar, oldErr = api.store(r).GetUserAvatar(ctxUser.ID)
+
-	err = api.store(r).UpdateUserAvatar(ctxUser.ID, finalPath, contentType)
+	txStore, err = api.Store.BeginImmediateStore(r.Context())
 	if err != nil {
 		_ = os.Remove(finalPath)
 		WriteJSONWithErrorReason(w, r, http.StatusInternalServerError, err.Error())
 		return
 	}
+	oldAvatar, oldErr = txStore.GetUserAvatar(ctxUser.ID)
+	if oldErr != nil && oldErr != sql.ErrNoRows {
+		_ = txStore.Rollback()
+		_ = os.Remove(finalPath)
+		WriteJSONWithErrorReason(w, r, http.StatusInternalServerError, oldErr.Error())
+		return
+	}
+	err = txStore.UpdateUserAvatar(ctxUser.ID, finalPath, contentType)
+	if err != nil {
+		_ = txStore.Rollback()
+		_ = os.Remove(finalPath)
+		WriteJSONWithErrorReason(w, r, http.StatusInternalServerError, err.Error())
+		return
+	}
+	user, err = txStore.GetUserByID(ctxUser.ID)
+	if err != nil {
+		_ = txStore.Rollback()
+		_ = os.Remove(finalPath)
+		WriteJSONWithErrorReason(w, r, http.StatusInternalServerError, err.Error())
+		return
+	}
+	err = txStore.Commit()
+	if err != nil {
+		_ = txStore.Rollback()
+		_ = os.Remove(finalPath)
+		WriteJSONWithErrorReason(w, r, http.StatusInternalServerError, err.Error())
+		return
+	}
 	if oldErr == nil && oldAvatar.StoragePath != "" && oldAvatar.StoragePath != finalPath {
 		_ = os.Remove(oldAvatar.StoragePath)
 	}
-	user, err = api.store(r).GetUserByID(ctxUser.ID)
-	if err != nil {
-		WriteJSONWithErrorReason(w, r, http.StatusInternalServerError, err.Error())
-		return
-	}
 	WriteJSON(w, http.StatusOK, user)
 }
 
@@ -973,30 +1016,45 @@ func (api *API) DeleteMyAvatar(w http.ResponseWriter, r *http.Request, _ map[str
 	var avatar models.UserAvatar
 	var ok bool
 	var err error
+	var txStore *db.Store
 
 	ctxUser, ok = middleware.UserFromContext(r.Context())
 	if !ok {
 		w.WriteHeader(http.StatusUnauthorized)
 		return
 	}
-	avatar, err = api.store(r).GetUserAvatar(ctxUser.ID)
+	txStore, err = api.Store.BeginImmediateStore(r.Context())
-	if err != nil && err != sql.ErrNoRows {
+	if err != nil {
 		WriteJSONWithErrorReason(w, r, http.StatusInternalServerError, err.Error())
 		return
 	}
-	err = api.store(r).ClearUserAvatar(ctxUser.ID)
+	avatar, err = txStore.GetUserAvatar(ctxUser.ID)
+	if err != nil && err != sql.ErrNoRows {
+		_ = txStore.Rollback()
+		WriteJSONWithErrorReason(w, r, http.StatusInternalServerError, err.Error())
+		return
+	}
+	err = txStore.ClearUserAvatar(ctxUser.ID)
 	if err != nil {
+		_ = txStore.Rollback()
+		WriteJSONWithErrorReason(w, r, http.StatusInternalServerError, err.Error())
+		return
+	}
+	user, err = txStore.GetUserByID(ctxUser.ID)
+	if err != nil {
+		_ = txStore.Rollback()
+		WriteJSONWithErrorReason(w, r, http.StatusInternalServerError, err.Error())
+		return
+	}
+	err = txStore.Commit()
+	if err != nil {
+		_ = txStore.Rollback()
 		WriteJSONWithErrorReason(w, r, http.StatusInternalServerError, err.Error())
 		return
 	}
 	if avatar.StoragePath != "" {
 		_ = os.Remove(avatar.StoragePath)
 	}
-	user, err = api.store(r).GetUserByID(ctxUser.ID)
-	if err != nil {
-		WriteJSONWithErrorReason(w, r, http.StatusInternalServerError, err.Error())
-		return
-	}
 	WriteJSON(w, http.StatusOK, user)
 }
 
@@ -2212,6 +2270,9 @@ func (api *API) DeleteProject(w http.ResponseWriter, r *http.Request, params map
 	var sourcePaths []string
 	var temp string
 	var txStore *db.Store
+	var repoIDs []string
+	var unlock func()
+	var locked bool
 
 	if !api.requireProjectRole(w, r, params["id"], models.RoleAdmin) { return }
 
@@ -2220,15 +2281,28 @@ func (api *API) DeleteProject(w http.ResponseWriter, r *http.Request, params map
 		WriteJSONWithErrorReason(w, r, http.StatusInternalServerError, err.Error())
 		return
 	}
+	for i = 0; i < len(repos); i++ {
+		repoIDs = append(repoIDs, repos[i].ID)
+	}
+	unlock, locked = api.tryLockRepos(repoIDs)
+	if !locked {
+		WriteJSONWithErrorReason(w, r, http.StatusConflict, "repository is busy")
+		return
+	}
+	defer unlock()
+	currentRepos, err = api.store(r).ListReposOwned(params["id"])
+	if err != nil {
+		WriteJSONWithErrorReason(w, r, http.StatusInternalServerError, err.Error())
+		return
+	}
+	if !sameRepoIDSet(repos, currentRepos) {
+		WriteJSONWithErrorReason(w, r, http.StatusConflict, "project repositories changed while deletion was starting")
+		return
+	}
+	repos = currentRepos
 
-	// Prevent deletion if a repo row is still in the provisioning window.
+	// Keep the explicit path check as a guard against incomplete or corrupted
-	// This can happen due to race condition with CreateRepo.
+	// repo rows. Normal in-process repo creation is serialized by repo locks.
-	// CreateRepo has two transactions:
-	//   1. Short DB transaction creates repo row with path="".
-	//   2. Transaction commits.
-	//   3. Handler initializes filesystem/git storage.
-	//   4. Second short DB transaction updates the repo row with the final path.
-	// If DeleteProject comes while 3 is ongoing, there is a risk.
 	for i = 0; i < len(repos); i++ {
 		if repos[i].Path == "" {
 			WriteJSON(w, http.StatusConflict, map[string]string{"error": "repository storage is not ready", "repo_id": repos[i].ID, "repo_name": repos[i].Name})
@@ -2710,6 +2784,7 @@ func (api *API) CreateRepo(w http.ResponseWriter, r *http.Request, params map[st
 	var dockerURL string
 	var ok bool
 	var err error
+	var unlock func()
 
 	if !api.requireProjectRole(w, r, params["projectId"], models.RoleWriter) { return }
 
@@ -2738,6 +2813,8 @@ func (api *API) CreateRepo(w http.ResponseWriter, r *http.Request, params map[st
 		WriteJSONWithErrorReason(w, r, http.StatusInternalServerError, "failed to create repo")
 		return
 	}
+	unlock = api.lockRepo(repoID)
+	defer unlock()
 
 	repo = models.Repo{
 		ID:          repoID,
@@ -3066,6 +3143,8 @@ func (api *API) DeleteRepo(w http.ResponseWriter, r *http.Request, params map[st
 	var rpmURL string
 	var dockerURL string
 	var err error
+	var unlock func()
+	var locked bool
 
 	repo, err = api.getRepoResolved(api.store(r), params["id"])
 	if err != nil {
@@ -3074,6 +3153,12 @@ func (api *API) DeleteRepo(w http.ResponseWriter, r *http.Request, params map[st
 	}
 
 	if !api.requireProjectRole(w, r, repo.ProjectID, models.RoleWriter) { return }
+	unlock, locked = api.tryLockRepo(repo.ID)
+	if !locked {
+		WriteJSONWithErrorReason(w, r, http.StatusConflict, "repository is busy")
+		return
+	}
+	defer unlock()
 
 	txStore, err = api.Store.BeginImmediateStore(r.Context())
 	if err != nil {
@@ -3081,7 +3166,8 @@ func (api *API) DeleteRepo(w http.ResponseWriter, r *http.Request, params map[st
 		return
 	}
 
-	// re-read to avoid race condition with CreateRepo which has uses two transactions
+	// Re-read under the delete transaction to validate current DB state before
+	// moving repository storage.
 	repo, err = txStore.GetRepo(params["id"])
 	if err != nil {
 		_ = txStore.Rollback()
@@ -3230,6 +3316,25 @@ func sameRepoStorageSet(a []models.Repo, b []models.Repo) bool {
 	return true
 }
 
+func sameRepoIDSet(a []models.Repo, b []models.Repo) bool {
+	var seen map[string]bool
+	var i int
+
+	if len(a) != len(b) {
+		return false
+	}
+	seen = make(map[string]bool, len(a))
+	for i = 0; i < len(a); i++ {
+		seen[a[i].ID] = true
+	}
+	for i = 0; i < len(b); i++ {
+		if !seen[b[i].ID] {
+			return false
+		}
+	}
+	return true
+}
+
 func moveToTrash(path string) (string, error) {
 	var dir string
 	var base string
@@ -3372,6 +3477,8 @@ func (api *API) RepoSetDefaultBranch(w http.ResponseWriter, r *http.Request, par
 	var repo models.Repo
 	var err error
 	var req repoBranchRequest
+	var unlock func()
+
 	if !api.requireRepoRole(w, r, params["id"], models.RoleAdmin) {
 		return
 	}
@@ -3380,6 +3487,8 @@ func (api *API) RepoSetDefaultBranch(w http.ResponseWriter, r *http.Request, par
 		WriteJSONWithErrorReason(w, r, http.StatusNotFound, "repo not found")
 		return
 	}
+	unlock = api.lockRepo(repo.ID)
+	defer unlock()
 	err = DecodeJSON(r, &req)
 	if err != nil || strings.TrimSpace(req.Name) == "" {
 		WriteJSONWithErrorReason(w, r, http.StatusBadRequest, "branch name required")
@@ -3398,6 +3507,8 @@ func (api *API) RepoDeleteBranch(w http.ResponseWriter, r *http.Request, params
 	var err error
 	var req repoBranchRequest
 	var name string
+	var unlock func()
+
 	if !api.requireRepoRole(w, r, params["id"], models.RoleAdmin) {
 		return
 	}
@@ -3406,6 +3517,8 @@ func (api *API) RepoDeleteBranch(w http.ResponseWriter, r *http.Request, params
 		WriteJSONWithErrorReason(w, r, http.StatusNotFound, "repo not found")
 		return
 	}
+	unlock = api.lockRepo(repo.ID)
+	defer unlock()
 	err = DecodeJSON(r, &req)
 	if err != nil {
 		WriteJSONWithErrorReason(w, r, http.StatusBadRequest, "invalid json")
@@ -3430,6 +3543,8 @@ func (api *API) RepoRenameBranch(w http.ResponseWriter, r *http.Request, params
 	var req repoBranchRenameRequest
 	var from string
 	var to string
+	var unlock func()
+
 	if !api.requireRepoRole(w, r, params["id"], models.RoleAdmin) {
 		return
 	}
@@ -3438,6 +3553,8 @@ func (api *API) RepoRenameBranch(w http.ResponseWriter, r *http.Request, params
 		WriteJSONWithErrorReason(w, r, http.StatusNotFound, "repo not found")
 		return
 	}
+	unlock = api.lockRepo(repo.ID)
+	defer unlock()
 	err = DecodeJSON(r, &req)
 	if err != nil {
 		WriteJSONWithErrorReason(w, r, http.StatusBadRequest, "invalid json")
@@ -3465,6 +3582,8 @@ func (api *API) RepoCreateBranch(w http.ResponseWriter, r *http.Request, params
 	var repo models.Repo
 	var err error
 	var req repoBranchCreateRequest
+	var unlock func()
+
 	if !api.requireRepoRole(w, r, params["id"], models.RoleAdmin) {
 		return
 	}
@@ -3473,6 +3592,8 @@ func (api *API) RepoCreateBranch(w http.ResponseWriter, r *http.Request, params
 		WriteJSONWithErrorReason(w, r, http.StatusNotFound, "repo not found")
 		return
 	}
+	unlock = api.lockRepo(repo.ID)
+	defer unlock()
 	err = DecodeJSON(r, &req)
 	if err != nil {
 		WriteJSONWithErrorReason(w, r, http.StatusBadRequest, "invalid json")
@@ -3905,6 +4026,8 @@ func (api *API) RepoRPMCreateSubdir(w http.ResponseWriter, r *http.Request, para
 	var allowDelete bool
 	var tlsInsecureSkipVerify bool
 	var syncIntervalSec int64
+	var unlock func()
+
 	repo, err = api.getRepoResolved(api.store(r), params["id"])
 	if err != nil {
 		WriteJSONWithErrorReason(w, r, http.StatusNotFound, "repo not found")
@@ -3917,6 +4040,8 @@ func (api *API) RepoRPMCreateSubdir(w http.ResponseWriter, r *http.Request, para
 		WriteJSONWithErrorReason(w, r, http.StatusBadRequest, "repo is not rpm")
 		return
 	}
+	unlock = api.lockRepo(repo.ID)
+	defer unlock()
 	err = DecodeJSON(r, &req)
 	if err != nil {
 		WriteJSONWithErrorReason(w, r, http.StatusBadRequest, "invalid json")
@@ -3996,6 +4121,14 @@ func (api *API) RepoRPMCreateSubdir(w http.ResponseWriter, r *http.Request, para
 		}
 	}
 	fullPath = filepath.Join(repo.Path, parentPath, name)
+	_, err = os.Stat(fullPath)
+	if err == nil {
+		WriteJSONWithErrorReason(w, r, http.StatusConflict, "path already exists")
+		return
+	} else if err != nil && !os.IsNotExist(err) {
+		WriteJSONWithErrorReason(w, r, http.StatusInternalServerError, err.Error())
+		return
+	}
 	err = os.MkdirAll(fullPath, 0o755)
 	if err != nil {
 		WriteJSONWithErrorReason(w, r, http.StatusInternalServerError, err.Error())
@@ -4005,6 +4138,7 @@ func (api *API) RepoRPMCreateSubdir(w http.ResponseWriter, r *http.Request, para
 		repodataPath = filepath.Join(fullPath, "repodata")
 		err = os.MkdirAll(repodataPath, 0o755)
 		if err != nil {
+			_ = os.RemoveAll(fullPath)
 			WriteJSONWithErrorReason(w, r, http.StatusInternalServerError, err.Error())
 			return
 		}
@@ -4023,6 +4157,7 @@ func (api *API) RepoRPMCreateSubdir(w http.ResponseWriter, r *http.Request, para
 		}
 		err = api.store(r).UpsertRPMRepoDir(dirConfig)
 		if err != nil {
+			_ = os.RemoveAll(fullPath)
 			WriteJSONWithErrorReason(w, r, http.StatusInternalServerError, err.Error())
 			return
 		}
@@ -4036,6 +4171,7 @@ func (api *API) RepoRPMGetSubdir(w http.ResponseWriter, r *http.Request, params
 	var normalizedPath string
 	var config models.RPMRepoDir
 	var err error
+
 	repo, err = api.getRepoResolved(api.store(r), params["id"])
 	if err != nil {
 		WriteJSONWithErrorReason(w, r, http.StatusNotFound, "repo not found")
@@ -4076,18 +4212,24 @@ func (api *API) RepoRPMSyncSubdir(w http.ResponseWriter, r *http.Request, params
 	var normalizedPath string
 	var config models.RPMRepoDir
 	var err error
+	var unlock func()
+
 	repo, err = api.getRepoResolved(api.store(r), params["id"])
 	if err != nil {
 		WriteJSONWithErrorReason(w, r, http.StatusNotFound, "repo not found")
 		return
 	}
-	if !api.requireRepoRole(w, r, repo.ID, models.RoleWriter) {
+
-		return
+	if !api.requireRepoRole(w, r, repo.ID, models.RoleWriter) { return }
-	}
+
 	if repo.Type != models.RepoTypeRPM {
 		WriteJSONWithErrorReason(w, r, http.StatusBadRequest, "repo is not rpm")
 		return
 	}
+
+	unlock = api.lockRepo(repo.ID)
+	defer unlock()
+
 	relPath = strings.TrimSpace(r.URL.Query().Get("path"))
 	if relPath == "" {
 		WriteJSONWithErrorReason(w, r, http.StatusBadRequest, "path required")
@@ -4115,6 +4257,7 @@ func (api *API) RepoRPMSyncSubdir(w http.ResponseWriter, r *http.Request, params
 		WriteJSONWithErrorReason(w, r, http.StatusBadRequest, "mirror sync is suspended")
 		return
 	}
+
 	err = api.store(r).MarkRPMMirrorTaskDirty(repo.ID, normalizedPath)
 	if err != nil {
 		WriteJSONWithErrorReason(w, r, http.StatusInternalServerError, err.Error())
@@ -4138,18 +4281,24 @@ func (api *API) RepoRPMRebuildSubdirMetadata(w http.ResponseWriter, r *http.Requ
 	var fullPath string
 	var repodataPath string
 	var err error
+	var unlock func()
+
 	repo, err = api.getRepoResolved(api.store(r), params["id"])
 	if err != nil {
 		WriteJSONWithErrorReason(w, r, http.StatusNotFound, "repo not found")
 		return
 	}
-	if !api.requireRepoRole(w, r, repo.ID, models.RoleWriter) {
+
-		return
+	if !api.requireRepoRole(w, r, repo.ID, models.RoleWriter) { return }
-	}
+
 	if repo.Type != models.RepoTypeRPM {
 		WriteJSONWithErrorReason(w, r, http.StatusBadRequest, "repo is not rpm")
 		return
 	}
+
+	unlock = api.lockRepo(repo.ID)
+	defer unlock()
+
 	relPath = strings.TrimSpace(r.URL.Query().Get("path"))
 	if relPath == "" {
 		WriteJSONWithErrorReason(w, r, http.StatusBadRequest, "path required")
@@ -4186,6 +4335,8 @@ func (api *API) RepoRPMCancelSubdirSync(w http.ResponseWriter, r *http.Request,
 	var config models.RPMRepoDir
 	var canceled bool
 	var err error
+	var unlock func()
+
 	repo, err = api.getRepoResolved(api.store(r), params["id"])
 	if err != nil {
 		WriteJSONWithErrorReason(w, r, http.StatusNotFound, "repo not found")
@@ -4198,6 +4349,8 @@ func (api *API) RepoRPMCancelSubdirSync(w http.ResponseWriter, r *http.Request,
 		WriteJSONWithErrorReason(w, r, http.StatusBadRequest, "repo is not rpm")
 		return
 	}
+	unlock = api.lockRepo(repo.ID)
+	defer unlock()
 	relPath = strings.TrimSpace(r.URL.Query().Get("path"))
 	if relPath == "" {
 		WriteJSONWithErrorReason(w, r, http.StatusBadRequest, "path required")
@@ -4244,6 +4397,8 @@ func (api *API) repoRPMSetSyncEnabled(w http.ResponseWriter, r *http.Request, pa
 	var config models.RPMRepoDir
 	var cancelRequested bool
 	var err error
+	var unlock func()
+
 	repo, err = api.getRepoResolved(api.store(r), params["id"])
 	if err != nil {
 		WriteJSONWithErrorReason(w, r, http.StatusNotFound, "repo not found")
@@ -4256,6 +4411,8 @@ func (api *API) repoRPMSetSyncEnabled(w http.ResponseWriter, r *http.Request, pa
 		WriteJSONWithErrorReason(w, r, http.StatusBadRequest, "repo is not rpm")
 		return
 	}
+	unlock = api.lockRepo(repo.ID)
+	defer unlock()
 	relPath = strings.TrimSpace(r.URL.Query().Get("path"))
 	if relPath == "" {
 		WriteJSONWithErrorReason(w, r, http.StatusBadRequest, "path required")
@@ -4390,6 +4547,11 @@ func (api *API) RepoRPMDeleteSubdir(w http.ResponseWriter, r *http.Request, para
 	var relPathClean string
 	var parentPath string
 	var repodataPath string
+	var ctx context.Context
+	var cancel context.CancelFunc
+	var txStore *db.Store
+	var unlock func()
+
 	repo, err = api.getRepoResolved(api.store(r), params["id"])
 	if err != nil {
 		WriteJSONWithErrorReason(w, r, http.StatusNotFound, "repo not found")
@@ -4402,6 +4564,8 @@ func (api *API) RepoRPMDeleteSubdir(w http.ResponseWriter, r *http.Request, para
 		WriteJSONWithErrorReason(w, r, http.StatusBadRequest, "repo is not rpm")
 		return
 	}
+	unlock = api.lockRepo(repo.ID)
+	defer unlock()
 	relPath = strings.TrimSpace(r.URL.Query().Get("path"))
 	if relPath == "" {
 		WriteJSONWithErrorReason(w, r, http.StatusBadRequest, "path required")
@@ -4495,17 +4659,32 @@ func (api *API) RepoRPMDeleteSubdir(w http.ResponseWriter, r *http.Request, para
 		WriteJSONWithErrorReason(w, r, http.StatusInternalServerError, err.Error())
 		return
 	}
-	err = api.store(r).DeleteRPMRepoDirSubtree(repo.ID, relPathClean)
+
+	ctx, cancel = context.WithTimeout(context.Background(), db.IndependentDBOperationTimeout)
+	defer cancel()
+	txStore, err = api.Store.BeginImmediateStore(ctx)
 	if err != nil {
 		WriteJSONWithErrorReason(w, r, http.StatusInternalServerError, err.Error())
 		return
 	}
+	err = txStore.DeleteRPMRepoDirSubtree(repo.ID, relPathClean)
+	if err != nil {
+		_ = txStore.Rollback()
+		WriteJSONWithErrorReason(w, r, http.StatusInternalServerError, err.Error())
+		return
+	}
+	err = txStore.Commit()
+	if err != nil {
+		_ = txStore.Rollback()
+		WriteJSONWithErrorReason(w, r, http.StatusInternalServerError, err.Error())
+		return
+	}
+
 	parentPath = filepath.Dir(fullPath)
 	repodataPath = filepath.Join(parentPath, "repodata")
 	_, err = os.Stat(repodataPath)
-	if err == nil && api.RpmMeta != nil {
+	if err == nil && api.RpmMeta != nil { api.RpmMeta.Schedule(parentPath) }
-		api.RpmMeta.Schedule(parentPath)
+
-	}
 	WriteJSON(w, http.StatusOK, map[string]string{"status": "ok"})
 }
 
@@ -4545,18 +4724,25 @@ func (api *API) RepoRPMRenameSubdir(w http.ResponseWriter, r *http.Request, para
 	var busy bool
 	var busyPath string
 	var busyReason string
+	var ctx context.Context
+	var cancel context.CancelFunc
+	var txStore *db.Store
+	var unlock func()
+
 	repo, err = api.getRepoResolved(api.store(r), params["id"])
 	if err != nil {
 		WriteJSONWithErrorReason(w, r, http.StatusNotFound, "repo not found")
 		return
 	}
-	if !api.requireRepoRole(w, r, repo.ID, models.RoleWriter) {
+
-		return
+	if !api.requireRepoRole(w, r, repo.ID, models.RoleWriter) { return }
-	}
+
 	if repo.Type != models.RepoTypeRPM {
 		WriteJSONWithErrorReason(w, r, http.StatusBadRequest, "repo is not rpm")
 		return
 	}
+	unlock = api.lockRepo(repo.ID)
+	defer unlock()
 	err = DecodeJSON(r, &req)
 	if err != nil {
 		WriteJSONWithErrorReason(w, r, http.StatusBadRequest, "invalid json")
@@ -4628,13 +4814,13 @@ func (api *API) RepoRPMRenameSubdir(w http.ResponseWriter, r *http.Request, para
 		WriteJSONWithErrorReason(w, r, http.StatusBadRequest, "path is not a directory")
 		return
 	}
+
 	parentRel = filepath.Dir(filepath.FromSlash(relPathClean))
-	if parentRel == "." {
+	if parentRel == "." { parentRel = "" }
-		parentRel = ""
-	}
 	parentPath = filepath.FromSlash(parentRel)
 	newPath = filepath.Join(repo.Path, parentPath, newName)
 	newRelPath = filepath.ToSlash(filepath.Join(parentRel, newName))
+
 	_, err = api.store(r).GetRPMRepoDir(repo.ID, newRelPath)
 	if err == nil {
 		targetConfigExists = true
@@ -4754,20 +4940,14 @@ func (api *API) RepoRPMRenameSubdir(w http.ResponseWriter, r *http.Request, para
 			WriteJSONWithErrorReason(w, r, http.StatusInternalServerError, err.Error())
 			return
 		}
-		err = os.Rename(fullPath, newPath)
+			err = os.Rename(fullPath, newPath)
-		if err != nil {
+			if err != nil {
-			WriteJSONWithErrorReason(w, r, http.StatusInternalServerError, err.Error())
+				WriteJSONWithErrorReason(w, r, http.StatusInternalServerError, err.Error())
-			return
+				return
+			}
 		}
-		err = api.store(r).MoveRPMRepoDir(r.Context(), repo.ID, relPathClean, newRelPath)
+		if isRepoDir {
-		if err != nil {
+			dirConfig = models.RPMRepoDir{
-			_ = os.Rename(newPath, fullPath)
-			WriteJSONWithErrorReason(w, r, http.StatusInternalServerError, err.Error())
-			return
-		}
-	}
-	if isRepoDir {
-		dirConfig = models.RPMRepoDir{
 			RepoID:                repo.ID,
 			Path:                  newRelPath,
 			Mode:                  newMode,
@@ -4788,14 +4968,24 @@ func (api *API) RepoRPMRenameSubdir(w http.ResponseWriter, r *http.Request, para
 				WriteJSONWithErrorReason(w, r, http.StatusInternalServerError, err.Error())
 				return
 			}
-			dirConfig.SyncEnabled = true
+				dirConfig.SyncEnabled = true
-		}
+			}
-		err = api.store(r).UpsertRPMRepoDir(dirConfig)
-		if err != nil {
-			WriteJSONWithErrorReason(w, r, http.StatusInternalServerError, err.Error())
-			return
 		}
+		if renamed || isRepoDir {
+			ctx, cancel = context.WithTimeout(context.Background(), db.IndependentDBOperationTimeout)
+			defer cancel()
+			txStore, err = api.Store.BeginImmediateStore(ctx)
+			if err == nil && renamed { err = txStore.MoveRPMRepoDir(ctx, repo.ID, relPathClean, newRelPath) }
+			if err == nil && isRepoDir { err = txStore.UpsertRPMRepoDir(dirConfig) }
+			if err == nil { err = txStore.Commit() }
+			if err != nil {
+				if txStore != nil { _ = txStore.Rollback() }
+				if renamed { _ = os.Rename(newPath, fullPath) }
+				WriteJSONWithErrorReason(w, r, http.StatusInternalServerError, err.Error())
+				return
+			}
 	}
+
 	repodataPath = filepath.Join(filepath.Join(repo.Path, parentPath), "repodata")
 	_, err = os.Stat(repodataPath)
 	if err == nil && api.RpmMeta != nil {
@@ -4817,6 +5007,8 @@ func (api *API) RepoRPMDeleteFile(w http.ResponseWriter, r *http.Request, params
 	var parentPath string
 	var repodataPath string
 	var lower string
+	var unlock func()
+
 	repo, err = api.getRepoResolved(api.store(r), params["id"])
 	if err != nil {
 		WriteJSONWithErrorReason(w, r, http.StatusNotFound, "repo not found")
@@ -4829,6 +5021,8 @@ func (api *API) RepoRPMDeleteFile(w http.ResponseWriter, r *http.Request, params
 		WriteJSONWithErrorReason(w, r, http.StatusBadRequest, "repo is not rpm")
 		return
 	}
+	unlock = api.lockRepo(repo.ID)
+	defer unlock()
 	relPath = strings.TrimSpace(r.URL.Query().Get("path"))
 	if relPath == "" {
 		WriteJSONWithErrorReason(w, r, http.StatusBadRequest, "path required")
@@ -5053,6 +5247,7 @@ func (api *API) RepoRPMUpload(w http.ResponseWriter, r *http.Request, params map
 	var info os.FileInfo
 	var oldTemp string
 	var ts string
+	var unlock func()
 
 	repo, err = api.getRepoResolved(api.store(r), params["id"])
 	if err != nil {
@@ -5066,6 +5261,8 @@ func (api *API) RepoRPMUpload(w http.ResponseWriter, r *http.Request, params map
 		WriteJSONWithErrorReason(w, r, http.StatusBadRequest, "repo is not rpm")
 		return
 	}
+	unlock = api.lockRepo(repo.ID)
+	defer unlock()
 	relPath = strings.TrimSpace(r.URL.Query().Get("path"))
 	overwriteParam = strings.TrimSpace(r.URL.Query().Get("overwrite"))
 	overwriteParam = strings.ToLower(overwriteParam)
@@ -5501,6 +5698,8 @@ func (api *API) RepoDockerDeleteTag(w http.ResponseWriter, r *http.Request, para
 	var image string
 	var tag string
 	var imagePath string
+	var unlock func()
+
 	repo, err = api.getRepoResolved(api.store(r), params["id"])
 	if err != nil {
 		WriteJSONWithErrorReason(w, r, http.StatusNotFound, "repo not found")
@@ -5513,6 +5712,8 @@ func (api *API) RepoDockerDeleteTag(w http.ResponseWriter, r *http.Request, para
 		WriteJSONWithErrorReason(w, r, http.StatusBadRequest, "repo is not docker")
 		return
 	}
+	unlock = api.lockRepo(repo.ID)
+	defer unlock()
 	image = strings.TrimSpace(r.URL.Query().Get("image"))
 	tag = strings.TrimSpace(r.URL.Query().Get("tag"))
 	if tag == "" {
@@ -5532,6 +5733,8 @@ func (api *API) RepoDockerDeleteImage(w http.ResponseWriter, r *http.Request, pa
 	var repo models.Repo
 	var err error
 	var image string
+	var unlock func()
+
 	repo, err = api.getRepoResolved(api.store(r), params["id"])
 	if err != nil {
 		WriteJSONWithErrorReason(w, r, http.StatusNotFound, "repo not found")
@@ -5544,6 +5747,8 @@ func (api *API) RepoDockerDeleteImage(w http.ResponseWriter, r *http.Request, pa
 		WriteJSONWithErrorReason(w, r, http.StatusBadRequest, "repo is not docker")
 		return
 	}
+	unlock = api.lockRepo(repo.ID)
+	defer unlock()
 	image = strings.TrimSpace(r.URL.Query().Get("image"))
 	err = docker.DeleteImage(repo.Path, image)
 	if err != nil {
@@ -5561,6 +5766,8 @@ func (api *API) RepoDockerRenameTag(w http.ResponseWriter, r *http.Request, para
 	var from string
 	var to string
 	var imagePath string
+	var unlock func()
+
 	repo, err = api.getRepoResolved(api.store(r), params["id"])
 	if err != nil {
 		WriteJSONWithErrorReason(w, r, http.StatusNotFound, "repo not found")
@@ -5573,6 +5780,8 @@ func (api *API) RepoDockerRenameTag(w http.ResponseWriter, r *http.Request, para
 		WriteJSONWithErrorReason(w, r, http.StatusBadRequest, "repo is not docker")
 		return
 	}
+	unlock = api.lockRepo(repo.ID)
+	defer unlock()
 	err = DecodeJSON(r, &req)
 	if err != nil {
 		WriteJSONWithErrorReason(w, r, http.StatusBadRequest, "invalid json")
@@ -5604,6 +5813,8 @@ func (api *API) RepoDockerRenameImage(w http.ResponseWriter, r *http.Request, pa
 	var req repoDockerRenameImageRequest
 	var from string
 	var to string
+	var unlock func()
+
 	repo, err = api.getRepoResolved(api.store(r), params["id"])
 	if err != nil {
 		WriteJSONWithErrorReason(w, r, http.StatusNotFound, "repo not found")
@@ -5616,6 +5827,8 @@ func (api *API) RepoDockerRenameImage(w http.ResponseWriter, r *http.Request, pa
 		WriteJSONWithErrorReason(w, r, http.StatusBadRequest, "repo is not docker")
 		return
 	}
+	unlock = api.lockRepo(repo.ID)
+	defer unlock()
 	err = DecodeJSON(r, &req)
 	if err != nil {
 		WriteJSONWithErrorReason(w, r, http.StatusBadRequest, "invalid json")

backend/internal/handlers/block-extras.go

@@ -421,9 +421,8 @@ func (api *API) DeleteBlockAttachment(w http.ResponseWriter, r *http.Request, pa
 	var item models.BlockAttachment
 	var err error
 
-	if !api.requireBoardRole(w, r, params["boardId"], models.RoleWriter) {
+	if !api.requireBoardRole(w, r, params["boardId"], models.RoleWriter) { return }
-		return
+
-	}
 	item, err = api.store(r).DeleteBlockAttachment(r.Context(), params["boardId"], params["blockId"], params["attachmentId"])
 	if err != nil {
 		if errors.Is(err, db.ErrBlockAttachmentNotFound) {

backend/internal/repolock/manager.go

@@ -0,0 +1,112 @@
+package repolock
+
+import "sort"
+import "strings"
+import "sync"
+
+type Manager struct {
+	locks sync.Map
+}
+
+func NewManager() *Manager {
+	return &Manager{}
+}
+
+func (m *Manager) Lock(repoID string) func() {
+	var key string
+	var value any
+	var actual any
+	var lock *sync.Mutex
+	var ok bool
+
+	if m == nil { return func() {} }
+	key = strings.TrimSpace(repoID)
+	if key == "" { key = "-" }
+	value = &sync.Mutex{}
+	actual, _ = m.locks.LoadOrStore(key, value)
+	lock, ok = actual.(*sync.Mutex)
+	if !ok || lock == nil { return func() {} }
+	lock.Lock()
+	return func() {
+		lock.Unlock()
+	}
+}
+
+func (m *Manager) TryLock(repoID string) (func(), bool) {
+	var key string
+	var value any
+	var actual any
+	var lock *sync.Mutex
+	var ok bool
+
+	if m == nil { return func() {}, true }
+	key = strings.TrimSpace(repoID)
+	if key == "" { key = "-" }
+	value = &sync.Mutex{}
+	actual, _ = m.locks.LoadOrStore(key, value)
+	lock, ok = actual.(*sync.Mutex)
+	if !ok || lock == nil { return func() {}, true }
+	if !lock.TryLock() { return nil, false }
+	return func() {
+		lock.Unlock()
+	}, true
+}
+
+func (m *Manager) LockMany(repoIDs []string) func() {
+	var ids []string
+	var seen map[string]bool
+	var unlocks []func()
+	var id string
+	var i int
+
+	seen = make(map[string]bool)
+	for i = 0; i < len(repoIDs); i++ {
+		id = strings.TrimSpace(repoIDs[i])
+		if id == "" || seen[id] { continue }
+		seen[id] = true
+		ids = append(ids, id)
+	}
+	sort.Strings(ids)
+	for i = 0; i < len(ids); i++ {
+		unlocks = append(unlocks, m.Lock(ids[i]))
+	}
+	return func() {
+		for i = len(unlocks) - 1; i >= 0; i-- {
+			if unlocks[i] != nil { unlocks[i]() }
+		}
+	}
+}
+
+func (m *Manager) TryLockMany(repoIDs []string) (func(), bool) {
+	var ids []string
+	var seen map[string]bool
+	var unlocks []func()
+	var unlock func()
+	var ok bool
+	var id string
+	var i int
+
+	seen = make(map[string]bool)
+	for i = 0; i < len(repoIDs); i++ {
+		id = strings.TrimSpace(repoIDs[i])
+		if id == "" || seen[id] { continue }
+		seen[id] = true
+		ids = append(ids, id)
+	}
+	sort.Strings(ids)
+	for i = 0; i < len(ids); i++ {
+		unlock, ok = m.TryLock(ids[i])
+		if !ok {
+			for i = len(unlocks) - 1; i >= 0; i-- {
+				if unlocks[i] != nil { unlocks[i]() }
+			}
+			return nil, false
+		}
+		unlocks = append(unlocks, unlock)
+	}
+	return func() {
+		for i = len(unlocks) - 1; i >= 0; i-- {
+			if unlocks[i] != nil { unlocks[i]() }
+		}
+	}, true
+}

backend/server.go

@@ -32,6 +32,7 @@ import codit_http "codit/internal/http"
 import "codit/internal/middleware"
 import "codit/internal/models"
 import "codit/internal/pkiutil"
+import "codit/internal/repolock"
 import "codit/internal/rpm"
 import "codit/internal/storage"
 import "codit/internal/util"
@@ -52,11 +53,13 @@ type server_http_log_writer struct {
 type gitPathRewriteHandler struct {
 	next  http.Handler
 	store *db.Store
+	locks *repolock.Manager
 }
 
 type gitIDPathRewriteHandler struct {
 	next  http.Handler
 	store *db.Store
+	locks *repolock.Manager
 }
 
 type rpmPathRewriteHandler struct {
@@ -157,6 +160,7 @@ type Server struct {
 	rpm_meta         *rpm.MetaManager
 	rpm_mirror       *rpm.MirrorManager
 	upload_store     *storage.FileStore
+	repo_locks       *repolock.Manager
 
 	docker_server    http.Handler
 	git_server       http.Handler
@@ -188,6 +192,8 @@ func (h *gitPathRewriteHandler) ServeHTTP(w http.ResponseWriter, r *http.Request
 	var repoStorageID int64
 	var err error
 	var newPath string
+	var unlock func()
+	var locked bool
 
 	currentStore = requestStore(r, h.store)
 	path = strings.TrimPrefix(r.URL.Path, "/")
@@ -233,6 +239,14 @@ func (h *gitPathRewriteHandler) ServeHTTP(w http.ResponseWriter, r *http.Request
 		RepoName:    repo.Name,
 	})
 	r.URL.Path = newPath
+	if classifyServiceOperation(serviceGit, r) == opWrite {
+		unlock, locked = h.locks.TryLock(repo.ID)
+		if !locked {
+			http.Error(w, "repository is busy", http.StatusConflict)
+			return
+		}
+		defer unlock()
+	}
 	h.next.ServeHTTP(w, r)
 }
 
@@ -250,6 +264,8 @@ func (h *gitIDPathRewriteHandler) ServeHTTP(w http.ResponseWriter, r *http.Reque
 	var err error
 	var newPath string
 	var repoID string
+	var unlock func()
+	var locked bool
 	currentStore = requestStore(r, h.store)
 	path = strings.TrimPrefix(r.URL.Path, "/")
 	if path == "" {
@@ -289,6 +305,14 @@ func (h *gitIDPathRewriteHandler) ServeHTTP(w http.ResponseWriter, r *http.Reque
 		RepoName:    repo.Name,
 	})
 	r.URL.Path = newPath
+	if classifyServiceOperation(serviceGit, r) == opWrite {
+		unlock, locked = h.locks.TryLock(repo.ID)
+		if !locked {
+			http.Error(w, "repository is busy", http.StatusConflict)
+			return
+		}
+		defer unlock()
+	}
 	h.next.ServeHTTP(w, r)
 }
 
@@ -589,6 +613,7 @@ func newServerWithInternalConfig(cfg *codit_config.Config, logger Logger, identi
 	app.rpm_meta = rpm.NewMetaManager()
 	app.rpm_mirror = rpm.NewMirrorManager(app.store, logger, app.rpm_meta)
 	app.upload_store = &storage.FileStore{BaseDir: app.uploads_base_dir}
+	app.repo_locks = repolock.NewManager()
 
 	for _, dir = range []string{app.docker_base_dir, app.git_base_dir, app.rpm_base_dir, app.uploads_base_dir} {
 		err = os.MkdirAll(dir, 0o755)
@@ -598,7 +623,7 @@ func newServerWithInternalConfig(cfg *codit_config.Config, logger Logger, identi
 		}
 	}
 
-	app.docker_server = docker.NewHTTPServer(app.store, app.docker_base_dir, nil, logger, cfg.DockerHTTPPrefix)
+	app.docker_server = docker.NewHTTPServer(app.store, app.docker_base_dir, nil, logger, cfg.DockerHTTPPrefix, app.repo_locks)
 
 	app.git_server, err = git.NewHTTPServer(app.git_base_dir, nil, logger)
 	if err != nil {
@@ -733,6 +758,7 @@ func (app *Server) initHandlers() (*handlers.API, *http.ServeMux, error) {
 		DockerBase:  app.docker_base_dir,
 		Uploads:     *app.upload_store,
 		Logger:      logger,
+		RepoLocks:   app.repo_locks,
 	})
 
 	router = codit_http.NewRouter()
@@ -754,8 +780,8 @@ func (app *Server) initHandlers() (*handlers.API, *http.ServeMux, error) {
 	router.Handle("GET", "/api/auth/oidc/:id/callback", api.OIDCCallbackWithProvider)
 	router.Handle("GET", "/api/me", txRead(api.Me))
 	router.Handle("PATCH", "/api/me", txWrite(api.UpdateMe))
-	router.Handle("POST", "/api/me/avatar", txWrite(api.UploadMyAvatar))
+	router.Handle("POST", "/api/me/avatar", api.UploadMyAvatar)
-	router.Handle("DELETE", "/api/me/avatar", txWrite(api.DeleteMyAvatar))
+	router.Handle("DELETE", "/api/me/avatar", api.DeleteMyAvatar)
 	router.Handle("GET", "/api/me/totp", txRead(api.GetMyTOTP))
 	router.Handle("POST", "/api/me/totp/setup", txWrite(api.SetupMyTOTP))
 	router.Handle("POST", "/api/me/totp/enable", txWrite(api.EnableMyTOTP))
@@ -987,7 +1013,7 @@ func (app *Server) initHandlers() (*handlers.API, *http.ServeMux, error) {
 	router.Handle("GET", "/api/boards/:boardId/blocks/:blockId/attachments", txRead(api.ListBlockAttachments))
 	router.Handle("POST", "/api/boards/:boardId/blocks/:blockId/attachments", api.CreateBlockAttachment)
 	router.Handle("GET", "/api/boards/:boardId/blocks/:blockId/attachments/:attachmentId/download", api.DownloadBlockAttachment)
-	router.Handle("DELETE", "/api/boards/:boardId/blocks/:blockId/attachments/:attachmentId", txWrite(api.DeleteBlockAttachment))
+	router.Handle("DELETE", "/api/boards/:boardId/blocks/:blockId/attachments/:attachmentId", api.DeleteBlockAttachment)
 	router.Handle("GET", "/api/boards/:boardId/blocks/:blockId/properties", txRead(api.GetBlockProperties))
 	router.Handle("PUT", "/api/boards/:boardId/blocks/:blockId/properties", txWrite(api.UpsertBlockProperties))
 	router.Handle("GET", "/api/boards/:boardId/members", txRead(api.ListBoardMembers))
@@ -1023,19 +1049,19 @@ func (app *Server) initHandlers() (*handlers.API, *http.ServeMux, error) {
 	router.Handle("GET", "/api/repos/:id/stats", api.RepoStats)
 	router.Handle("GET", "/api/repos/:id/rpm/packages", txRead(api.RepoRPMPackages))
 	router.Handle("GET", "/api/repos/:id/rpm/package", txRead(api.RepoRPMPackage))
-	router.Handle("POST", "/api/repos/:id/rpm/subdirs", txWrite(api.RepoRPMCreateSubdir))
+	router.Handle("POST", "/api/repos/:id/rpm/subdirs", api.RepoRPMCreateSubdir)
 	router.Handle("GET", "/api/repos/:id/rpm/subdir", txRead(api.RepoRPMGetSubdir))
-	router.Handle("POST", "/api/repos/:id/rpm/subdir/update", txWrite(api.RepoRPMRenameSubdir))
+	router.Handle("POST", "/api/repos/:id/rpm/subdir/update", api.RepoRPMRenameSubdir)
-	router.Handle("POST", "/api/repos/:id/rpm/subdir/rename", txWrite(api.RepoRPMRenameSubdir))
+	router.Handle("POST", "/api/repos/:id/rpm/subdir/rename", api.RepoRPMRenameSubdir)
-	router.Handle("POST", "/api/repos/:id/rpm/subdir/sync", txWrite(api.RepoRPMSyncSubdir))
+	router.Handle("POST", "/api/repos/:id/rpm/subdir/sync", api.RepoRPMSyncSubdir)
-	router.Handle("POST", "/api/repos/:id/rpm/subdir/suspend", txWrite(api.RepoRPMSuspendSubdir))
+	router.Handle("POST", "/api/repos/:id/rpm/subdir/suspend", api.RepoRPMSuspendSubdir)
-	router.Handle("POST", "/api/repos/:id/rpm/subdir/resume", txWrite(api.RepoRPMResumeSubdir))
+	router.Handle("POST", "/api/repos/:id/rpm/subdir/resume", api.RepoRPMResumeSubdir)
 	router.Handle("POST", "/api/repos/:id/rpm/subdir/rebuild-metadata", api.RepoRPMRebuildSubdirMetadata)
-	router.Handle("POST", "/api/repos/:id/rpm/subdir/cancel", txWrite(api.RepoRPMCancelSubdirSync))
+	router.Handle("POST", "/api/repos/:id/rpm/subdir/cancel", api.RepoRPMCancelSubdirSync)
 	router.Handle("GET", "/api/repos/:id/rpm/subdir/runs", txRead(api.RepoRPMMirrorRuns))
 	router.Handle("DELETE", "/api/repos/:id/rpm/subdir/runs", txWrite(api.RepoRPMClearMirrorRuns))
-	router.Handle("DELETE", "/api/repos/:id/rpm/subdir", txWrite(api.RepoRPMDeleteSubdir))
+	router.Handle("DELETE", "/api/repos/:id/rpm/subdir", api.RepoRPMDeleteSubdir)
-	router.Handle("DELETE", "/api/repos/:id/rpm/file", txWrite(api.RepoRPMDeleteFile))
+	router.Handle("DELETE", "/api/repos/:id/rpm/file", api.RepoRPMDeleteFile)
 	router.Handle("GET", "/api/repos/:id/rpm/file", api.RepoRPMFile)
 	router.Handle("GET", "/api/repos/:id/rpm/tree", txRead(api.RepoRPMTree))
 	router.Handle("POST", "/api/repos/:id/rpm/upload", api.RepoRPMUpload)
@@ -1086,32 +1112,27 @@ func (app *Server) initHandlers() (*handlers.API, *http.ServeMux, error) {
 
 	mux = http.NewServeMux()
 
-	gitRewrite = &gitPathRewriteHandler{next: app.git_server, store: store}
+	gitRewrite = &gitPathRewriteHandler{next: app.git_server, store: store, locks: app.repo_locks}
 	gitHandler = withServiceAuth(serviceGit, cfg.GitHTTPPrefix, http.StripPrefix(cfg.GitHTTPPrefix, gitRewrite), auth_user, store, logger)
-	gitHandler = middleware.WithStoreTransactionUnbuffered(store, gitHandler)
 	gitHandler = middleware.WithRequestStore(store, gitHandler)
 	mux.Handle(cfg.GitHTTPPrefix+"/", gitHandler)
 
-	gitIDRewrite = &gitIDPathRewriteHandler{next: app.git_server, store: store}
+	gitIDRewrite = &gitIDPathRewriteHandler{next: app.git_server, store: store, locks: app.repo_locks}
 	gitIDHandler = withServiceAuth(serviceGit, cfg.GitHTTPPrefix+"-id", http.StripPrefix(cfg.GitHTTPPrefix+"-id", gitIDRewrite), auth_user, store, logger)
-	gitIDHandler = middleware.WithStoreTransactionUnbuffered(store, gitIDHandler)
 	gitIDHandler = middleware.WithRequestStore(store, gitIDHandler)
 	mux.Handle(cfg.GitHTTPPrefix+"-id/", gitIDHandler)
 
 	rpmRewrite = &rpmPathRewriteHandler{next: app.rpm_server, store: store}
 	rpmHandler = withServiceAuth(serviceRPM, cfg.RPMHTTPPrefix, http.StripPrefix(cfg.RPMHTTPPrefix, rpmRewrite), auth_user, store, logger)
-	rpmHandler = middleware.WithStoreTransactionUnbuffered(store, rpmHandler)
 	rpmHandler = middleware.WithRequestStore(store, rpmHandler)
 	mux.Handle(cfg.RPMHTTPPrefix+"/", rpmHandler)
 
 	rpmIDRewrite = &rpmIDPathRewriteHandler{next: app.rpm_server, store: store}
 	rpmIDHandler = withServiceAuth(serviceRPM, cfg.RPMHTTPPrefix+"-id", http.StripPrefix(cfg.RPMHTTPPrefix+"-id", rpmIDRewrite), auth_user, store, logger)
-	rpmIDHandler = middleware.WithStoreTransactionUnbuffered(store, rpmIDHandler)
 	rpmIDHandler = middleware.WithRequestStore(store, rpmIDHandler)
 	mux.Handle(cfg.RPMHTTPPrefix+"-id/", rpmIDHandler)
 
 	dockerHandler = withServiceAuth(serviceV2, cfg.DockerHTTPPrefix, app.docker_server, auth_user, store, logger)
-	dockerHandler = middleware.WithStoreTransactionUnbuffered(store, dockerHandler)
 	dockerHandler = middleware.WithRequestStore(store, dockerHandler)
 	mux.Handle(cfg.DockerHTTPPrefix, dockerHandler)
 	mux.Handle(cfg.DockerHTTPPrefix+"/", dockerHandler)
@@ -1739,36 +1760,26 @@ func withAPIAuth(next http.Handler, auth func(store *db.Store, username string,
 
 func classifyServiceOperation(service serviceKind, r *http.Request) opKind {
 	var serviceName string
+	var path string
+	var method string
+
 	serviceName = ""
 	if r != nil {
 		serviceName = r.URL.Query().Get("service")
+		path = r.URL.Path
+		method = r.Method
 	}
+
 	if service == serviceGit {
-		if strings.Contains(r.URL.Path, "git-receive-pack") || serviceName == "git-receive-pack" {
+		if strings.Contains(path, "git-receive-pack") || serviceName == "git-receive-pack" { return opWrite }
-			return opWrite
+	} else if service == serviceAPI {
-		}
+		if method != http.MethodGet && method != http.MethodHead && method != http.MethodOptions { return opWrite }
-		return opRead
+	} else if service == serviceRPM {
-	}
+		if method != http.MethodGet && method != http.MethodHead && method != http.MethodOptions { return opWrite }
-	if service == serviceAPI {
+	} else if service == serviceV2 {
-		if r.Method == http.MethodGet || r.Method == http.MethodHead || r.Method == http.MethodOptions {
+		if method == http.MethodPost || method == http.MethodPut || method == http.MethodPatch || method == http.MethodDelete { return opWrite }
-			return opRead
-		}
-		return opWrite
-	}
-	if service == serviceRPM {
-		if r.Method == http.MethodGet || r.Method == http.MethodHead || r.Method == http.MethodOptions {
-			return opRead
-		}
-		return opWrite
-	}
-	if service == serviceV2 {
-		if r.Method == http.MethodGet || r.Method == http.MethodHead {
-			return opRead
-		}
-		if r.Method == http.MethodPost || r.Method == http.MethodPut || r.Method == http.MethodPatch || r.Method == http.MethodDelete {
-			return opWrite
-		}
 	}
+
 	return opRead
 }