static ya_result
journal_ix_reopen(journal *jh)
{
journal_ix *jix = (journal_ix*)jh;
ya_result ret = SUCCESS;
journal_ix_writelock(jix);
if(jix->fd < 0)
{
if(ISOK(ret = open_ex(jix->journal_name, O_RDWR)))
{
jix->fd = ret;
}
else
{
ret = ERRNO_ERROR;
if(ret == MAKE_ERRNO_ERROR(ENOENT))
{
ret = ZDB_ERROR_ICMTL_NOTFOUND;
}
}
}
journal_ix_writeunlock(jix);
return ret;
}
static ya_result
journal_ix_get_ixfr_stream_at_serial(journal *jh, u32 serial_from, input_stream *out_input_stream, dns_resource_record *last_soa_rr)
{
journal_ix *jix = (journal_ix*)jh;
ya_result return_value = SUCCESS;
journal_ix_readlock(jix);
/*
* check that serial_from in in the journal range
* set the file descriptor to the position
* create a stream that'll stop at the current end of the stream
*/
if(serial_lt(serial_from, jix->first_serial) || serial_ge(serial_from, jix->last_serial) || ((jix->first_serial == 0) && (jix->last_serial == 0)))
{
/* out of known range */
journal_ix_readunlock(jix);
if(serial_from == jix->last_serial)
{
return SUCCESS;
}
else
{
return ZDB_JOURNAL_SERIAL_OUT_OF_KNOWN_RANGE;
}
}
/*
* On success, dup() returns a new file descriptor that has the following in common with the original:
*
* _ Same open file (or pipe)
* _ Same file pointer (both file descriptors share one file pointer) <= THIS is a problem
* _ Same access mode (read, write, or read/write)
*
* So this is wrong:
*
* cloned_fd = dup(jix->fd);
*/
int cloned_fd;
while((cloned_fd = open_ex(jix->journal_name, O_RDONLY)) < 0)
{
int err = errno;
if(err == EINTR)
{
continue;
}
return_value = MAKE_ERRNO_ERROR(err);
#ifdef DEBUG
log_debug("journal: ix: unable to clone the file descriptor: %r", return_value);
#endif
journal_ix_readunlock(jix);
return return_value;
}
/*
* given that I use a clone of the fd and
* given that only appends are done in the file and
* given that the limit of the file has already been processed (should be at this point)
*
* THEN
*
* there is no point keeping the lock for reading (on unix systems)
*/
struct stat journal_stat;
s64 last_page_offset = jix->last_page_offset;
if(fstat(cloned_fd, &journal_stat) < 0)
{
return_value = ERRNO_ERROR;
log_err("journal: ix: unable to get journal file status", return_value);
close_ex(cloned_fd);
return return_value;
}
s64 file_size = journal_stat.st_size;
#if DEBUG_JOURNAL
log_debug("journal: ix: the last page starts at position %lld", last_page_offset);
#endif
journal_ix_readunlock(jix);
jix = NULL;
input_stream fis;
fd_input_stream_attach(&fis, cloned_fd);
if(last_soa_rr != NULL)
{
/* seek and store the last SOA print*/
last_soa_rr->tctr.qtype = 0; // clear type
if(lseek(cloned_fd, last_page_offset, SEEK_SET) >= 0)
{
/* deleted SOA */
if((return_value = dns_resource_record_read(last_soa_rr, &fis)) > 0 ) // Not FAIL nor EOF
{
if(last_soa_rr->tctr.qtype == TYPE_SOA)
{
/* DEL records */
last_soa_rr->tctr.qtype = 0; // clear type
/* scan until added SOA found */
while((return_value = dns_resource_record_read(last_soa_rr, &fis)) > 0 ) // Not FAIL nor EOF
{
if(last_soa_rr->tctr.qtype == TYPE_SOA)
{
break;
}
}
}
}
// if the SOA has not been found, it's an error (EOF has been reached is covered by this)
if(ISOK(return_value))
{
if(last_soa_rr->tctr.qtype != TYPE_SOA)
{
return_value = ZDB_JOURNAL_SOA_RECORD_EXPECTED;
}
}
}
else
{
return_value = ERRNO_ERROR;
}
if(FAIL(return_value))
{
input_stream_close(&fis);
return return_value;
}
}
/*
* this format has no indexing so we scan for a page that STARTS with a DELETE of the SOA with serial = serial_from
*/
if(lseek(cloned_fd, 0, SEEK_SET) != 0) /* the resulting offset MUST be zero */
{
return_value = ERRNO_ERROR;
if(ISOK(return_value))
{
return_value = ERROR;
}
input_stream_close(&fis);
return return_value;
}
input_stream bis;
dns_resource_record rr;
dns_resource_record_init(&rr);
buffer_input_stream_init(&fis, &bis, 512);
s64 offset = 0;
/* skip until the right serial is found */
u32 soa_count = 0;
#ifdef DEBUG_JOURNAL
u32 rr_count = 0;
#endif
for(;;)
{
if( (return_value = dns_resource_record_read(&rr, &bis)) <= 0 ) // FAIL or nothing to
{
return_value = ZDB_JOURNAL_ERROR_READING_JOURNAL; /* is the journal file broken ? */
break;
}
#ifdef DEBUG_JOURNAL
rr_count++;
#endif
u32 record_size = return_value;
if(rr.tctr.qtype == TYPE_SOA)
{
// ((0+1)&1) != 0 => Y N Y N
if((++soa_count & 1) != 0) // 1 2 3 4
{
u8 *p = rr.rdata;
if(FAIL(return_value = dnsname_len(p)))
{
break;
}
p += return_value;
if(FAIL(return_value = dnsname_len(p)))
{
break;
}
p += return_value;
u32 serial = ntohl(GET_U32_AT(*p));
if(serial_ge(serial, serial_from))
{
if(serial == serial_from)
{
/* setup the serial to be from 'offset' up to the current length of the stream */
return_value = SUCCESS;
}
else
{
/* the serial does not exist in the range */
return_value = ZDB_JOURNAL_SERIAL_OUT_OF_KNOWN_RANGE;
}
break;
}
}
}
offset += record_size;
}
#if DEBUG_JOURNAL
log_debug("journal: ix: serial %08x (%d) is at offset %lld. %d records parsed", serial_from, serial_from, offset, rr_count);
#endif
dns_resource_record_clear(&rr);
/*
* detach the file descriptor from the file stream in the buffer stream
* I do it like this because the streams are not needed anymore but the
* file descriptor still is (if no error occurred)
*/
fd_input_stream_detach(buffer_input_stream_get_filtered(&bis));
input_stream_close(&bis);
if(ISOK(return_value))
{
// offset is the start of the page we are looking for
if(lseek(cloned_fd, offset, SEEK_SET) >= 0)
{
fd_input_stream_attach(&fis, cloned_fd);
limited_input_stream_init(&fis, out_input_stream, file_size - offset);
}
else
{
return_value = ERRNO_ERROR;
close_ex(cloned_fd);
}
}
else
{
close_ex(cloned_fd);
}
return return_value;
}
static void*
scheduler_queue_zone_write_thread(void* data_)
{
char fullname_tmp[MAX_PATH];
zone_write_param *zwp = (zone_write_param*)data_;
zdb_zone *zone = zwp->zone;
u32 serial;
log_info("zone write text: writing %{dnsname} zone file", zone->origin);
if(ZDB_ZONE_INVALID(zone))
{
log_err("zone write text: zone %{dnsname} marked as invalid", zone->origin);
scheduler_schedule_task(scheduler_queue_zone_write_callback, zwp);
return NULL;
}
if(FAIL(zdb_zone_getserial(zone, &serial)))
{
log_err("zone write text: no SOA in %{dnsname}", zone->origin);
scheduler_schedule_task(scheduler_queue_zone_write_callback, zwp);
return NULL;
}
if(FAIL(snformat(fullname_tmp, sizeof (fullname_tmp), "%s.%d.tmp", zwp->file_path, serial)))
{
log_err("zone write text: path '%s.%d.tmp' is too big", zwp->file_path, serial);
scheduler_schedule_task(scheduler_queue_zone_write_callback, zwp);
/* WARNING: From this point forward, 'zone' cannot be used anymore */
return NULL;
}
/**
* @todo check there is not already a zone file writer working here ...
*
*/
/*
* delete the temp file if it exists already
*/
if(unlink(fullname_tmp) < 0)
{
int err = errno;
if(err != ENOENT)
{
log_err("zone write text: cannot cleanup '%s': %r", MAKE_ERRNO_ERROR(err));
scheduler_schedule_task(scheduler_queue_zone_write_callback, zwp);
/* WARNING: From this point forward, 'zone' cannot be used anymore */
return NULL;
}
}
log_info("zone write text: writing '%s'", fullname_tmp);
zdb_zone_lock(zone, ZDB_ZONE_MUTEX_SIMPLEREADER);
zdb_zone_write_text_file(zone, fullname_tmp, FALSE);
zdb_zone_unlock(zone, ZDB_ZONE_MUTEX_SIMPLEREADER);
log_info("zone write text: renaming '%s' to '%s'", fullname_tmp, zwp->file_path);
if(rename(fullname_tmp, zwp->file_path) < 0)
{
log_err("zone write text: unable to rename tmp zone file into '%s': %r", zwp->file_path, ERRNO_ERROR);
scheduler_schedule_task(scheduler_queue_zone_write_callback, zwp);
/** @note Calling this so the scheduler gets a SCHEDULER_TASK_FINISHED is mandatory. */
return NULL;
}
log_info("zone write text: %{dnsname} zone file written", zone->origin);
scheduler_schedule_task(scheduler_queue_zone_write_callback, zwp);
/* WARNING: From this point forward, 'zwp' cannot be used anymore */
return NULL;
}
static ya_result
config_main_verify_and_update_directory(const char *base_path, char **dirp)
{
char fullpath[PATH_MAX];
char tempfile[PATH_MAX];
if(dirp == NULL)
{
return UNEXPECTED_NULL_ARGUMENT_ERROR;
}
char *dir = *dirp;
if(dir == NULL)
{
return UNEXPECTED_NULL_ARGUMENT_ERROR;
}
ya_result fullpath_len = snprintf(fullpath, sizeof(fullpath),"/%s/%s", base_path, dir);
if(FAIL(fullpath_len))
{
return fullpath_len;
}
bool dirsep = TRUE;
int j = 1;
for(int i = 1; i <= fullpath_len; i++)
{
char c = fullpath[i];
if(c == '/')
{
if(!dirsep)
{
fullpath[j++] = c;
}
dirsep = TRUE;
}
else
{
fullpath[j++] = fullpath[i];
dirsep = FALSE;
}
}
struct stat ds;
if(stat(fullpath, &ds) < 0)
{
int err = errno;
ttylog_err("error: '%s': %s", fullpath, strerror(err));
return MAKE_ERRNO_ERROR(err);
}
if((ds.st_mode & S_IFMT) != S_IFDIR)
{
ttylog_err("error: '%s' is not a directory", dir);
return INVALID_PATH;
}
snformat(tempfile, sizeof(tempfile), "%s/ydf.XXXXXX", fullpath);
int tempfd;
if((tempfd = mkstemp(tempfile)) < 0)
{
int return_code = ERRNO_ERROR;
ttylog_err("error: '%s' is not writable: %r", fullpath, return_code);
return return_code;
}
unlink(tempfile);
close_ex(tempfd);
free(dir);
*dirp = strdup(fullpath);
chroot_manage_path(dirp, fullpath, FALSE);
return SUCCESS;
}
ya_result
tcp_input_output_stream_connect_sockaddr(const struct sockaddr *sa, input_stream *istream_, output_stream *ostream_, struct sockaddr *bind_from, u8 to_sec)
{
int fd;
while((fd = socket(sa->sa_family, SOCK_STREAM, 0)) < 0)
{
int err = errno;
if(err != EINTR)
{
return MAKE_ERRNO_ERROR(err);
}
}
/*
* Bind the socket if required.
*/
if(bind_from != NULL)
{
while((bind(fd, bind_from, sizeof(socketaddress))) < 0)
{
int err = errno;
if(err != EINTR)
{
close_ex(fd); /* could clear errno */
return MAKE_ERRNO_ERROR(err);
}
}
}
int ssec, susec, rsec, rusec;
tcp_get_sendtimeout(fd, &ssec, &susec);
tcp_get_recvtimeout(fd, &rsec, &rusec);
tcp_set_sendtimeout(fd, to_sec, 0);
tcp_set_recvtimeout(fd, to_sec, 0);
tcp_set_nodelay(fd, tcp_nodelay);
tcp_set_cork(fd, tcp_cork);
#if HAS_SOCKADDR_SA_LEN
while(connect(fd, sa, sa->sa_len) < 0)
#else
while(connect(fd, sa, sizeof(socketaddress)) < 0)
#endif
{
int err = errno;
if(err != EINTR)
{
close_ex(fd);
// Linux quirk
if(err == EINPROGRESS)
{
err = ETIMEDOUT;
}
return MAKE_ERRNO_ERROR(err);
}
}
/* can only fail if fd < 0, which is never the case here */
fd_input_stream_attach(istream_, fd);
fd_output_stream_attach_noclose(ostream_, fd);
tcp_set_sendtimeout(fd, ssec, susec);
tcp_set_recvtimeout(fd, rsec, rusec);
return fd;
}