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/* Copyright (c) 2002-2018 Dovecot authors, see the included COPYING file */
#include "lib.h"
#include "nfs-workarounds.h"
#include "fs-api.h"
#include "dbox-save.h"
#include "dbox-attachment.h"
#include "sdbox-storage.h"
#include "sdbox-file.h"
#include "mail-copy.h"
static int
sdbox_file_copy_attachments(struct sdbox_file *src_file,
struct sdbox_file *dest_file)
{
struct dbox_storage *src_storage = src_file->file.storage;
struct dbox_storage *dest_storage = dest_file->file.storage;
struct fs_file *src_fsfile, *dest_fsfile;
ARRAY_TYPE(mail_attachment_extref) extrefs;
const struct mail_attachment_extref *extref;
const char *extrefs_line, *src, *dest, *dest_relpath;
pool_t pool;
int ret;
if (src_storage->attachment_dir == NULL) {
/* no attachments in source storage */
return 1;
}
if (dest_storage->attachment_dir == NULL ||
strcmp(src_storage->attachment_dir,
dest_storage->attachment_dir) != 0 ||
strcmp(src_storage->storage.set->mail_attachment_fs,
dest_storage->storage.set->mail_attachment_fs) != 0 ||
strcmp(src_storage->storage.set->mail_attachment_hash,
dest_storage->storage.set->mail_attachment_hash) != 0) {
/* different attachment dirs/settings between storages.
have to copy the slow way. */
return 0;
}
if ((ret = sdbox_file_get_attachments(&src_file->file,
&extrefs_line)) <= 0)
return ret < 0 ? -1 : 1;
pool = pool_alloconly_create("sdbox attachments copy", 1024);
p_array_init(&extrefs, pool, 16);
if (!index_attachment_parse_extrefs(extrefs_line, pool, &extrefs)) {
mailbox_set_critical(&dest_file->mbox->box,
"Can't copy %s with corrupted extref metadata: %s",
src_file->file.cur_path, extrefs_line);
pool_unref(&pool);
return -1;
}
dest_file->attachment_pool =
pool_alloconly_create("sdbox attachment copy paths", 512);
p_array_init(&dest_file->attachment_paths, dest_file->attachment_pool,
array_count(&extrefs));
ret = 1;
array_foreach(&extrefs, extref) T_BEGIN {
src = t_strdup_printf("%s/%s", dest_storage->attachment_dir,
sdbox_file_attachment_relpath(src_file, extref->path));
dest_relpath = p_strconcat(dest_file->attachment_pool,
extref->path, "-",
guid_generate(), NULL);
dest = t_strdup_printf("%s/%s", dest_storage->attachment_dir,
dest_relpath);
/* we verified above that attachment_fs is compatible for
src and dest, so it doesn't matter which storage's
attachment_fs we use. in any case we need to use the same
one or fs_copy() will crash with assert. */
src_fsfile = fs_file_init(dest_storage->attachment_fs, src,
FS_OPEN_MODE_READONLY);
dest_fsfile = fs_file_init(dest_storage->attachment_fs, dest,
FS_OPEN_MODE_READONLY);
if (fs_copy(src_fsfile, dest_fsfile) < 0) {
mailbox_set_critical(&dest_file->mbox->box, "%s",
fs_file_last_error(dest_fsfile));
ret = -1;
} else {
array_push_back(&dest_file->attachment_paths,
&dest_relpath);
}
fs_file_deinit(&src_fsfile);
fs_file_deinit(&dest_fsfile);
} T_END;
pool_unref(&pool);
return ret;
}
static int
sdbox_copy_hardlink(struct mail_save_context *_ctx, struct mail *mail)
{
struct dbox_save_context *ctx = DBOX_SAVECTX(_ctx);
struct sdbox_mailbox *dest_mbox = SDBOX_MAILBOX(_ctx->transaction->box);
struct sdbox_mailbox *src_mbox;
struct dbox_file *src_file, *dest_file;
const char *src_path, *dest_path;
int ret;
if (strcmp(mail->box->storage->name, SDBOX_STORAGE_NAME) == 0)
src_mbox = SDBOX_MAILBOX(mail->box);
else {
/* Source storage isn't sdbox, can't hard link */
return 0;
}
src_file = sdbox_file_init(src_mbox, mail->uid);
dest_file = sdbox_file_init(dest_mbox, 0);
ctx->ctx.data.flags &= ENUM_NEGATE(DBOX_INDEX_FLAG_ALT);
src_path = src_file->primary_path;
dest_path = dest_file->primary_path;
ret = nfs_safe_link(src_path, dest_path, FALSE);
if (ret < 0 && errno == ENOENT && src_file->alt_path != NULL) {
src_path = src_file->alt_path;
if (dest_file->alt_path != NULL) {
dest_path = dest_file->cur_path = dest_file->alt_path;
ctx->ctx.data.flags |= DBOX_INDEX_FLAG_ALT;
}
ret = nfs_safe_link(src_path, dest_path, FALSE);
}
if (ret < 0) {
if (ECANTLINK(errno))
ret = 0;
else if (errno == ENOENT) {
/* try if the fallback copying code can still
read the file (the mail could still have the
stream open) */
ret = 0;
} else {
mail_set_critical(mail, "link(%s, %s) failed: %m",
src_path, dest_path);
}
dbox_file_unref(&src_file);
dbox_file_unref(&dest_file);
return ret;
}
ret = sdbox_file_copy_attachments((struct sdbox_file *)src_file,
(struct sdbox_file *)dest_file);
if (ret <= 0) {
(void)sdbox_file_unlink_aborted_save((struct sdbox_file *)dest_file);
dbox_file_unref(&src_file);
dbox_file_unref(&dest_file);
return ret;
}
((struct sdbox_file *)dest_file)->written_to_disk = TRUE;
dbox_save_add_to_index(ctx);
index_copy_cache_fields(_ctx, mail, ctx->seq);
sdbox_save_add_file(_ctx, dest_file);
mail_set_seq_saving(_ctx->dest_mail, ctx->seq);
dbox_file_unref(&src_file);
return 1;
}
int sdbox_copy(struct mail_save_context *_ctx, struct mail *mail)
{
struct dbox_save_context *ctx = (struct dbox_save_context *)_ctx;
struct mailbox_transaction_context *_t = _ctx->transaction;
struct sdbox_mailbox *mbox = (struct sdbox_mailbox *)_t->box;
int ret;
i_assert((_t->flags & MAILBOX_TRANSACTION_FLAG_EXTERNAL) != 0);
ctx->finished = TRUE;
if (mail_storage_copy_can_use_hardlink(mail->box, &mbox->box) &&
_ctx->data.guid == NULL) {
T_BEGIN {
ret = sdbox_copy_hardlink(_ctx, mail);
} T_END;
if (ret != 0) {
index_save_context_free(_ctx);
return ret > 0 ? 0 : -1;
}
/* non-fatal hardlinking failure, try the slow way */
}
return mail_storage_copy(_ctx, mail);
}
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