--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/lib-storage/index/dbox-single/sdbox-storage.c	Tue Oct 06 19:22:42 2009 -0400
@@ -0,0 +1,378 @@
+/* Copyright (c) 2007-2009 Dovecot authors, see the included COPYING file */
+
+#include "lib.h"
+#include "array.h"
+#include "ioloop.h"
+#include "hex-binary.h"
+#include "randgen.h"
+#include "mkdir-parents.h"
+#include "unlink-directory.h"
+#include "unlink-old-files.h"
+#include "index-mail.h"
+#include "mail-index-modseq.h"
+#include "mailbox-uidvalidity.h"
+#include "dbox-mail.h"
+#include "dbox-save.h"
+#include "sdbox-file.h"
+#include "sdbox-sync.h"
+#include "sdbox-storage.h"
+
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/stat.h>
+
+#define SDBOX_LIST_CONTEXT(obj) \
+	MODULE_CONTEXT(obj, sdbox_mailbox_list_module)
+
+struct sdbox_mailbox_list {
+	union mailbox_list_module_context module_ctx;
+};
+
+extern struct mail_storage dbox_storage;
+extern struct mailbox sdbox_mailbox;
+extern struct dbox_storage_vfuncs sdbox_dbox_storage_vfuncs;
+
+static MODULE_CONTEXT_DEFINE_INIT(sdbox_mailbox_list_module,
+				  &mailbox_list_module_register);
+
+static struct mail_storage *sdbox_storage_alloc(void)
+{
+	struct sdbox_storage *storage;
+	pool_t pool;
+
+	pool = pool_alloconly_create("dbox storage", 512+256);
+	storage = p_new(pool, struct sdbox_storage, 1);
+	storage->storage.v = sdbox_dbox_storage_vfuncs;
+	storage->storage.storage = dbox_storage;
+	storage->storage.storage.pool = pool;
+	return &storage->storage.storage;
+}
+
+struct mailbox *
+sdbox_mailbox_alloc(struct mail_storage *storage, struct mailbox_list *list,
+		    const char *name, struct istream *input,
+		    enum mailbox_flags flags)
+{
+	struct sdbox_mailbox *mbox;
+	pool_t pool;
+
+	/* dbox can't work without index files */
+	flags &= ~MAILBOX_FLAG_NO_INDEX_FILES;
+
+	pool = pool_alloconly_create("dbox mailbox", 1024+512);
+	mbox = p_new(pool, struct sdbox_mailbox, 1);
+	mbox->ibox.box = sdbox_mailbox;
+	mbox->ibox.box.pool = pool;
+	mbox->ibox.box.storage = storage;
+	mbox->ibox.box.list = list;
+	mbox->ibox.mail_vfuncs = &sdbox_mail_vfuncs;
+
+	mbox->ibox.save_commit_pre = sdbox_transaction_save_commit_pre;
+	mbox->ibox.save_commit_post = sdbox_transaction_save_commit_post;
+	mbox->ibox.save_rollback = sdbox_transaction_save_rollback;
+
+	index_storage_mailbox_alloc(&mbox->ibox, name, input, flags,
+				    DBOX_INDEX_PREFIX);
+	mail_index_set_fsync_types(mbox->ibox.index,
+				   MAIL_INDEX_SYNC_TYPE_APPEND |
+				   MAIL_INDEX_SYNC_TYPE_EXPUNGE);
+
+	mbox->ibox.index_flags |= MAIL_INDEX_OPEN_FLAG_KEEP_BACKUPS |
+		MAIL_INDEX_OPEN_FLAG_NEVER_IN_MEMORY;
+
+	mbox->storage = (struct sdbox_storage *)storage;
+	mbox->alt_path =
+		p_strconcat(pool, list->set.alt_dir, "/",
+			    list->set.maildir_name, NULL);
+	mbox->hdr_ext_id =
+		mail_index_ext_register(mbox->ibox.index, "dbox-hdr",
+					sizeof(struct sdbox_index_header), 0, 0);
+	return &mbox->ibox.box;
+}
+
+int sdbox_read_header(struct sdbox_mailbox *mbox,
+		      struct sdbox_index_header *hdr)
+{
+	const void *data;
+	size_t data_size;
+
+	mail_index_get_header_ext(mbox->ibox.view, mbox->hdr_ext_id,
+				  &data, &data_size);
+	if (data_size < SDBOX_INDEX_HEADER_MIN_SIZE &&
+	    (!mbox->creating || data_size != 0)) {
+		mail_storage_set_critical(&mbox->storage->storage.storage,
+			"dbox %s: Invalid dbox header size",
+			mbox->ibox.box.path);
+		return -1;
+	}
+	memset(hdr, 0, sizeof(*hdr));
+	memcpy(hdr, data, I_MIN(data_size, sizeof(*hdr)));
+	return 0;
+}
+
+void sdbox_update_header(struct sdbox_mailbox *mbox,
+			 struct mail_index_transaction *trans,
+			 const struct mailbox_update *update)
+{
+	struct sdbox_index_header hdr, new_hdr;
+
+	if (sdbox_read_header(mbox, &hdr) < 0)
+		memset(&hdr, 0, sizeof(hdr));
+
+	new_hdr = hdr;
+
+	if (update != NULL && !mail_guid_128_is_empty(update->mailbox_guid)) {
+		memcpy(new_hdr.mailbox_guid, update->mailbox_guid,
+		       sizeof(new_hdr.mailbox_guid));
+	} else if (mail_guid_128_is_empty(new_hdr.mailbox_guid)) {
+		mail_generate_guid_128(new_hdr.mailbox_guid);
+	}
+
+	if (memcmp(&hdr, &new_hdr, sizeof(hdr)) != 0) {
+		mail_index_update_header_ext(trans, mbox->hdr_ext_id, 0,
+					     &new_hdr, sizeof(new_hdr));
+	}
+}
+
+static int sdbox_write_index_header(struct mailbox *box,
+				    const struct mailbox_update *update)
+{
+	struct sdbox_mailbox *mbox = (struct sdbox_mailbox *)box;
+	struct mail_index_transaction *trans;
+	const struct mail_index_header *hdr;
+	uint32_t uid_validity, uid_next;
+
+	hdr = mail_index_get_header(mbox->ibox.view);
+	trans = mail_index_transaction_begin(mbox->ibox.view, 0);
+	sdbox_update_header(mbox, trans, update);
+
+	if (update != NULL && update->uid_validity != 0)
+		uid_validity = update->uid_validity;
+	else if (hdr->uid_validity == 0) {
+		/* set uidvalidity */
+		uid_validity = dbox_get_uidvalidity_next(box->list);
+	}
+
+	if (hdr->uid_validity != uid_validity) {
+		mail_index_update_header(trans,
+			offsetof(struct mail_index_header, uid_validity),
+			&uid_validity, sizeof(uid_validity), TRUE);
+	}
+	if (update != NULL && hdr->next_uid < update->min_next_uid) {
+		uid_next = update->min_next_uid;
+		mail_index_update_header(trans,
+			offsetof(struct mail_index_header, next_uid),
+			&uid_next, sizeof(uid_next), TRUE);
+	}
+	if (update != NULL && update->min_highest_modseq != 0 &&
+	    mail_index_modseq_get_highest(mbox->ibox.view) <
+	    					update->min_highest_modseq) {
+		mail_index_update_highest_modseq(trans,
+						 update->min_highest_modseq);
+	}
+
+	if (mail_index_transaction_commit(&trans) < 0) {
+		mail_storage_set_internal_error(box->storage);
+		mail_index_reset_error(mbox->ibox.index);
+		return -1;
+	}
+	return 0;
+}
+
+static int sdbox_mailbox_create_indexes(struct mailbox *box,
+					const struct mailbox_update *update)
+{
+	struct sdbox_mailbox *mbox = (struct sdbox_mailbox *)box;
+	const char *origin;
+	mode_t mode;
+	gid_t gid;
+	int ret;
+
+	mailbox_list_get_dir_permissions(box->list, NULL, &mode, &gid, &origin);
+	if (mkdir_parents_chgrp(box->path, mode, gid, origin) == 0) {
+		/* create indexes immediately with the dbox header */
+		if (index_storage_mailbox_open(box) < 0)
+			return -1;
+		mbox->creating = TRUE;
+		ret = sdbox_write_index_header(box, update);
+		mbox->creating = FALSE;
+		if (ret < 0)
+			return -1;
+	} else if (errno != EEXIST) {
+		if (!mail_storage_set_error_from_errno(box->storage)) {
+			mail_storage_set_critical(box->storage,
+				"mkdir(%s) failed: %m", box->path);
+		}
+		return -1;
+	}
+	return 0;
+}
+
+static void sdbox_storage_get_status_guid(struct mailbox *box,
+					  struct mailbox_status *status_r)
+{
+	struct sdbox_mailbox *mbox = (struct sdbox_mailbox *)box;
+	struct sdbox_index_header hdr;
+
+	if (sdbox_read_header(mbox, &hdr) < 0)
+		memset(&hdr, 0, sizeof(hdr));
+
+	if (mail_guid_128_is_empty(hdr.mailbox_guid)) {
+		/* regenerate it */
+		if (sdbox_write_index_header(box, NULL) < 0 ||
+		    sdbox_read_header(mbox, &hdr) < 0)
+			return;
+	}
+	memcpy(status_r->mailbox_guid, hdr.mailbox_guid,
+	       sizeof(status_r->mailbox_guid));
+}
+
+static void
+dbox_storage_get_status(struct mailbox *box, enum mailbox_status_items items,
+			struct mailbox_status *status_r)
+{
+	index_storage_get_status(box, items, status_r);
+
+	if ((items & STATUS_GUID) != 0)
+		sdbox_storage_get_status_guid(box, status_r);
+}
+
+static int
+dbox_mailbox_update(struct mailbox *box, const struct mailbox_update *update)
+{
+	if (!box->opened) {
+		if (index_storage_mailbox_open(box) < 0)
+			return -1;
+	}
+	return sdbox_write_index_header(box, update);
+}
+
+static int
+sdbox_list_delete_mailbox(struct mailbox_list *list, const char *name)
+{
+	struct sdbox_mailbox_list *mlist = SDBOX_LIST_CONTEXT(list);
+	const char *trash_dest;
+	int ret;
+
+	/* Make sure the indexes are closed before trying to delete the
+	   directory that contains them. It can still fail with some NFS
+	   implementations if indexes are opened by another session, but
+	   that can't really be helped. */
+	index_storage_destroy_unrefed();
+
+	/* delete the index and control directories */
+	if (mlist->module_ctx.super.delete_mailbox(list, name) < 0)
+		return -1;
+
+	if ((ret = dbox_list_delete_mailbox1(list, name, &trash_dest)) < 0)
+		return -1;
+	return dbox_list_delete_mailbox2(list, name, ret, trash_dest);
+}
+
+static int
+sdbox_list_rename_mailbox(struct mailbox_list *oldlist, const char *oldname,
+			  struct mailbox_list *newlist, const char *newname,
+			  bool rename_children)
+{
+	struct sdbox_mailbox_list *oldmlist = SDBOX_LIST_CONTEXT(oldlist);
+
+	if (oldmlist->module_ctx.super.
+	    		rename_mailbox(oldlist, oldname, newlist, newname,
+				       rename_children) < 0)
+		return -1;
+	return dbox_list_rename_mailbox(oldlist, oldname, newlist, newname,
+					rename_children);
+}
+
+static void sdbox_storage_add_list(struct mail_storage *storage ATTR_UNUSED,
+				   struct mailbox_list *list)
+{
+	struct sdbox_mailbox_list *mlist;
+
+	mlist = p_new(list->pool, struct sdbox_mailbox_list, 1);
+	mlist->module_ctx.super = list->v;
+
+	list->v.iter_is_mailbox = dbox_list_iter_is_mailbox;
+	list->v.delete_mailbox = sdbox_list_delete_mailbox;
+	list->v.rename_mailbox = sdbox_list_rename_mailbox;
+	list->v.rename_mailbox_pre = dbox_list_rename_mailbox_pre;
+
+	MODULE_CONTEXT_SET(list, sdbox_mailbox_list_module, mlist);
+}
+
+struct mail_storage dbox_storage = {
+	MEMBER(name) SDBOX_STORAGE_NAME,
+	MEMBER(class_flags) 0,
+
+	{
+                NULL,
+		sdbox_storage_alloc,
+		NULL,
+		index_storage_destroy,
+		sdbox_storage_add_list,
+		dbox_storage_get_list_settings,
+		NULL,
+		sdbox_mailbox_alloc,
+		NULL
+	}
+};
+
+struct mailbox sdbox_mailbox = {
+	MEMBER(name) NULL,
+	MEMBER(storage) NULL,
+	MEMBER(list) NULL,
+
+	{
+		index_storage_is_readonly,
+		index_storage_allow_new_keywords,
+		index_storage_mailbox_enable,
+		dbox_mailbox_open,
+		index_storage_mailbox_close,
+		dbox_mailbox_create,
+		dbox_mailbox_update,
+		dbox_storage_get_status,
+		NULL,
+		NULL,
+		sdbox_storage_sync_init,
+		index_mailbox_sync_next,
+		index_mailbox_sync_deinit,
+		NULL,
+		dbox_notify_changes,
+		index_transaction_begin,
+		index_transaction_commit,
+		index_transaction_rollback,
+		index_transaction_set_max_modseq,
+		index_keywords_create,
+		index_keywords_create_from_indexes,
+		index_keywords_ref,
+		index_keywords_unref,
+		index_keyword_is_valid,
+		index_storage_get_seq_range,
+		index_storage_get_uid_range,
+		index_storage_get_expunges,
+		NULL,
+		NULL,
+		NULL,
+		dbox_mail_alloc,
+		index_header_lookup_init,
+		index_header_lookup_deinit,
+		index_storage_search_init,
+		index_storage_search_deinit,
+		index_storage_search_next_nonblock,
+		index_storage_search_next_update_seq,
+		sdbox_save_alloc,
+		sdbox_save_begin,
+		dbox_save_continue,
+		sdbox_save_finish,
+		sdbox_save_cancel,
+		sdbox_copy,
+		index_storage_is_inconsistent
+	}
+};
+
+struct dbox_storage_vfuncs sdbox_dbox_storage_vfuncs = {
+	dbox_file_free,
+	sdbox_file_create_fd,
+	sdbox_mail_open,
+	sdbox_mailbox_create_indexes
+};