if (!lock->lk)
lock->lk = xcalloc(1, sizeof(struct lock_file));
- if (hold_lock_file_for_update(lock->lk, ref_file.buf, LOCK_NO_DEREF) < 0) {
+ if (hold_lock_file_for_update_timeout(
+ lock->lk, ref_file.buf, LOCK_NO_DEREF,
+ get_files_ref_lock_timeout_ms()) < 0) {
if (errno == ENOENT && --attempts_remaining > 0) {
/*
* Maybe somebody just deleted one of the
const char *prefix, unsigned int flags)
{
struct files_ref_store *refs;
- struct ref_iterator *loose_iter, *packed_iter;
+ struct ref_iterator *loose_iter, *packed_iter, *overlay_iter;
struct files_ref_iterator *iter;
struct ref_iterator *ref_iterator;
unsigned int required_flags = REF_STORE_READ;
refs = files_downcast(ref_store, required_flags, "ref_iterator_begin");
- iter = xcalloc(1, sizeof(*iter));
- ref_iterator = &iter->base;
- base_ref_iterator_init(ref_iterator, &files_ref_iterator_vtable);
-
/*
* We must make sure that all loose refs are read before
* accessing the packed-refs file; this avoids a race
refs->packed_ref_store, prefix, 0,
DO_FOR_EACH_INCLUDE_BROKEN);
- iter->iter0 = overlay_ref_iterator_begin(loose_iter, packed_iter);
+ overlay_iter = overlay_ref_iterator_begin(loose_iter, packed_iter);
+
+ iter = xcalloc(1, sizeof(*iter));
+ ref_iterator = &iter->base;
+ base_ref_iterator_init(ref_iterator, &files_ref_iterator_vtable,
+ overlay_iter->ordered);
+ iter->iter0 = overlay_iter;
iter->flags = flags;
return ref_iterator;
{
struct lock_file *lk = cb;
- return hold_lock_file_for_update(lk, path, LOCK_NO_DEREF) < 0 ? -1 : 0;
+ return hold_lock_file_for_update_timeout(
+ lk, path, LOCK_NO_DEREF,
+ get_files_ref_lock_timeout_ms()) < 0 ? -1 : 0;
}
/*
strbuf_release(&err);
}
-static void prune_refs(struct files_ref_store *refs, struct ref_to_prune *r)
+/*
+ * Prune the loose versions of the references in the linked list
+ * `*refs_to_prune`, freeing the entries in the list as we go.
+ */
+static void prune_refs(struct files_ref_store *refs, struct ref_to_prune **refs_to_prune)
{
- while (r) {
+ while (*refs_to_prune) {
+ struct ref_to_prune *r = *refs_to_prune;
+ *refs_to_prune = r->next;
prune_ref(refs, r);
- r = r->next;
+ free(r);
}
}
int ok;
struct ref_to_prune *refs_to_prune = NULL;
struct strbuf err = STRBUF_INIT;
+ struct ref_transaction *transaction;
+
+ transaction = ref_store_transaction_begin(refs->packed_ref_store, &err);
+ if (!transaction)
+ return -1;
packed_refs_lock(refs->packed_ref_store, LOCK_DIE_ON_ERROR, &err);
continue;
/*
- * Create an entry in the packed-refs cache equivalent
- * to the one from the loose ref cache, except that
- * we don't copy the peeled status, because we want it
- * to be re-peeled.
+ * Add a reference creation for this reference to the
+ * packed-refs transaction:
*/
- add_packed_ref(refs->packed_ref_store, iter->refname, iter->oid);
+ if (ref_transaction_update(transaction, iter->refname,
+ iter->oid->hash, NULL,
+ REF_NODEREF, NULL, &err))
+ die("failure preparing to create packed reference %s: %s",
+ iter->refname, err.buf);
/* Schedule the loose reference for pruning if requested. */
if ((flags & PACK_REFS_PRUNE)) {
if (ok != ITER_DONE)
die("error while iterating over references");
- if (commit_packed_refs(refs->packed_ref_store, &err))
- die("unable to overwrite old ref-pack file: %s", err.buf);
+ if (ref_transaction_commit(transaction, &err))
+ die("unable to write new packed-refs: %s", err.buf);
+
+ ref_transaction_free(transaction);
+
packed_refs_unlock(refs->packed_ref_store);
- prune_refs(refs, refs_to_prune);
+ prune_refs(refs, &refs_to_prune);
strbuf_release(&err);
return 0;
}
if (packed_refs_lock(refs->packed_ref_store, 0, &err))
goto error;
- if (repack_without_refs(refs->packed_ref_store, refnames, &err)) {
+ if (refs_delete_refs(refs->packed_ref_store, msg, refnames, flags)) {
packed_refs_unlock(refs->packed_ref_store);
goto error;
}
struct ref_iterator *ref_iterator = &iter->base;
struct strbuf sb = STRBUF_INIT;
- base_ref_iterator_init(ref_iterator, &files_reflog_iterator_vtable);
+ base_ref_iterator_init(ref_iterator, &files_reflog_iterator_vtable, 0);
files_reflog_path(refs, &sb, NULL);
iter->dir_iterator = dir_iterator_begin(sb.buf);
iter->ref_store = ref_store;
return 0;
}
+struct files_transaction_backend_data {
+ struct ref_transaction *packed_transaction;
+ int packed_refs_locked;
+};
+
/*
* Unlock any references in `transaction` that are still locked, and
* mark the transaction closed.
*/
-static void files_transaction_cleanup(struct ref_transaction *transaction)
+static void files_transaction_cleanup(struct files_ref_store *refs,
+ struct ref_transaction *transaction)
{
size_t i;
+ struct files_transaction_backend_data *backend_data =
+ transaction->backend_data;
+ struct strbuf err = STRBUF_INIT;
for (i = 0; i < transaction->nr; i++) {
struct ref_update *update = transaction->updates[i];
}
}
+ if (backend_data->packed_transaction &&
+ ref_transaction_abort(backend_data->packed_transaction, &err)) {
+ error("error aborting transaction: %s", err.buf);
+ strbuf_release(&err);
+ }
+
+ if (backend_data->packed_refs_locked)
+ packed_refs_unlock(refs->packed_ref_store);
+
+ free(backend_data);
+
transaction->state = REF_TRANSACTION_CLOSED;
}
char *head_ref = NULL;
int head_type;
struct object_id head_oid;
+ struct files_transaction_backend_data *backend_data;
+ struct ref_transaction *packed_transaction = NULL;
assert(err);
if (!transaction->nr)
goto cleanup;
+ backend_data = xcalloc(1, sizeof(*backend_data));
+ transaction->backend_data = backend_data;
+
/*
* Fail if a refname appears more than once in the
* transaction. (If we end up splitting up any updates using
head_ref, &affected_refnames, err);
if (ret)
break;
+
+ if (update->flags & REF_DELETING &&
+ !(update->flags & REF_LOG_ONLY) &&
+ !(update->flags & REF_ISPRUNING)) {
+ /*
+ * This reference has to be deleted from
+ * packed-refs if it exists there.
+ */
+ if (!packed_transaction) {
+ packed_transaction = ref_store_transaction_begin(
+ refs->packed_ref_store, err);
+ if (!packed_transaction) {
+ ret = TRANSACTION_GENERIC_ERROR;
+ goto cleanup;
+ }
+
+ backend_data->packed_transaction =
+ packed_transaction;
+ }
+
+ ref_transaction_add_update(
+ packed_transaction, update->refname,
+ update->flags & ~REF_HAVE_OLD,
+ update->new_oid.hash, update->old_oid.hash,
+ NULL);
+ }
+ }
+
+ if (packed_transaction) {
+ if (packed_refs_lock(refs->packed_ref_store, 0, err)) {
+ ret = TRANSACTION_GENERIC_ERROR;
+ goto cleanup;
+ }
+ backend_data->packed_refs_locked = 1;
+ ret = ref_transaction_prepare(packed_transaction, err);
}
cleanup:
string_list_clear(&affected_refnames, 0);
if (ret)
- files_transaction_cleanup(transaction);
+ files_transaction_cleanup(refs, transaction);
else
transaction->state = REF_TRANSACTION_PREPARED;
files_downcast(ref_store, 0, "ref_transaction_finish");
size_t i;
int ret = 0;
- struct string_list refs_to_delete = STRING_LIST_INIT_NODUP;
- struct string_list_item *ref_to_delete;
struct strbuf sb = STRBUF_INIT;
+ struct files_transaction_backend_data *backend_data;
+ struct ref_transaction *packed_transaction;
+
assert(err);
return 0;
}
+ backend_data = transaction->backend_data;
+ packed_transaction = backend_data->packed_transaction;
+
/* Perform updates first so live commits remain referenced */
for (i = 0; i < transaction->nr; i++) {
struct ref_update *update = transaction->updates[i];
}
}
}
- /* Perform deletes now that updates are safely completed */
+
+ /*
+ * Now that updates are safely completed, we can perform
+ * deletes. First delete the reflogs of any references that
+ * will be deleted, since (in the unexpected event of an
+ * error) leaving a reference without a reflog is less bad
+ * than leaving a reflog without a reference (the latter is a
+ * mildly invalid repository state):
+ */
+ for (i = 0; i < transaction->nr; i++) {
+ struct ref_update *update = transaction->updates[i];
+ if (update->flags & REF_DELETING &&
+ !(update->flags & REF_LOG_ONLY) &&
+ !(update->flags & REF_ISPRUNING)) {
+ strbuf_reset(&sb);
+ files_reflog_path(refs, &sb, update->refname);
+ if (!unlink_or_warn(sb.buf))
+ try_remove_empty_parents(refs, update->refname,
+ REMOVE_EMPTY_PARENTS_REFLOG);
+ }
+ }
+
+ /*
+ * Perform deletes now that updates are safely completed.
+ *
+ * First delete any packed versions of the references, while
+ * retaining the packed-refs lock:
+ */
+ if (packed_transaction) {
+ ret = ref_transaction_commit(packed_transaction, err);
+ ref_transaction_free(packed_transaction);
+ packed_transaction = NULL;
+ backend_data->packed_transaction = NULL;
+ if (ret)
+ goto cleanup;
+ }
+
+ /* Now delete the loose versions of the references: */
for (i = 0; i < transaction->nr; i++) {
struct ref_update *update = transaction->updates[i];
struct ref_lock *lock = update->backend_data;
}
update->flags |= REF_DELETED_LOOSE;
}
-
- if (!(update->flags & REF_ISPRUNING))
- string_list_append(&refs_to_delete,
- lock->ref_name);
}
}
- if (packed_refs_lock(refs->packed_ref_store, 0, err)) {
- ret = TRANSACTION_GENERIC_ERROR;
- goto cleanup;
- }
-
- if (repack_without_refs(refs->packed_ref_store, &refs_to_delete, err)) {
- ret = TRANSACTION_GENERIC_ERROR;
- packed_refs_unlock(refs->packed_ref_store);
- goto cleanup;
- }
-
- packed_refs_unlock(refs->packed_ref_store);
-
- /* Delete the reflogs of any references that were deleted: */
- for_each_string_list_item(ref_to_delete, &refs_to_delete) {
- strbuf_reset(&sb);
- files_reflog_path(refs, &sb, ref_to_delete->string);
- if (!unlink_or_warn(sb.buf))
- try_remove_empty_parents(refs, ref_to_delete->string,
- REMOVE_EMPTY_PARENTS_REFLOG);
- }
-
clear_loose_ref_cache(refs);
cleanup:
- files_transaction_cleanup(transaction);
+ files_transaction_cleanup(refs, transaction);
for (i = 0; i < transaction->nr; i++) {
struct ref_update *update = transaction->updates[i];
}
strbuf_release(&sb);
- string_list_clear(&refs_to_delete, 0);
return ret;
}
struct ref_transaction *transaction,
struct strbuf *err)
{
- files_transaction_cleanup(transaction);
+ struct files_ref_store *refs =
+ files_downcast(ref_store, 0, "ref_transaction_abort");
+
+ files_transaction_cleanup(refs, transaction);
return 0;
}
size_t i;
int ret = 0;
struct string_list affected_refnames = STRING_LIST_INIT_NODUP;
+ struct ref_transaction *packed_transaction = NULL;
assert(err);
&affected_refnames))
die("BUG: initial ref transaction called with existing refs");
+ packed_transaction = ref_store_transaction_begin(refs->packed_ref_store, err);
+ if (!packed_transaction) {
+ ret = TRANSACTION_GENERIC_ERROR;
+ goto cleanup;
+ }
+
for (i = 0; i < transaction->nr; i++) {
struct ref_update *update = transaction->updates[i];
ret = TRANSACTION_NAME_CONFLICT;
goto cleanup;
}
+
+ /*
+ * Add a reference creation for this reference to the
+ * packed-refs transaction:
+ */
+ ref_transaction_add_update(packed_transaction, update->refname,
+ update->flags & ~REF_HAVE_OLD,
+ update->new_oid.hash, update->old_oid.hash,
+ NULL);
}
if (packed_refs_lock(refs->packed_ref_store, 0, err)) {
goto cleanup;
}
- for (i = 0; i < transaction->nr; i++) {
- struct ref_update *update = transaction->updates[i];
-
- if ((update->flags & REF_HAVE_NEW) &&
- !is_null_oid(&update->new_oid))
- add_packed_ref(refs->packed_ref_store, update->refname,
- &update->new_oid);
- }
-
- if (commit_packed_refs(refs->packed_ref_store, err)) {
+ if (initial_ref_transaction_commit(packed_transaction, err)) {
ret = TRANSACTION_GENERIC_ERROR;
goto cleanup;
}
cleanup:
+ if (packed_transaction)
+ ref_transaction_free(packed_transaction);
packed_refs_unlock(refs->packed_ref_store);
transaction->state = REF_TRANSACTION_CLOSED;
string_list_clear(&affected_refnames, 0);
projects / thirdparty / git.git / blobdiff