freebsd-skq/sbin/hastd/parse.y
pjd 25b3d91c28 If the underlying provider doesn't support BIO_FLUSH, log it only once
and don't bother trying in the future.

MFC after:	3 days
2011-09-28 13:19:47 +00:00

968 lines
20 KiB
Plaintext

%{
/*-
* Copyright (c) 2009-2010 The FreeBSD Foundation
* Copyright (c) 2011 Pawel Jakub Dawidek <pawel@dawidek.net>
* All rights reserved.
*
* This software was developed by Pawel Jakub Dawidek under sponsorship from
* the FreeBSD Foundation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include <sys/param.h> /* MAXHOSTNAMELEN */
#include <sys/queue.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <arpa/inet.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>
#include <pjdlog.h>
#include "hast.h"
extern int depth;
extern int lineno;
extern FILE *yyin;
extern char *yytext;
static struct hastd_config *lconfig;
static struct hast_resource *curres;
static bool mynode, hadmynode;
static char depth0_control[HAST_ADDRSIZE];
static char depth0_listen_tcp4[HAST_ADDRSIZE];
static char depth0_listen_tcp6[HAST_ADDRSIZE];
static TAILQ_HEAD(, hastd_listen) depth0_listen;
static int depth0_replication;
static int depth0_checksum;
static int depth0_compression;
static int depth0_timeout;
static char depth0_exec[PATH_MAX];
static int depth0_metaflush;
static char depth1_provname[PATH_MAX];
static char depth1_localpath[PATH_MAX];
static int depth1_metaflush;
extern void yyrestart(FILE *);
static int
isitme(const char *name)
{
char buf[MAXHOSTNAMELEN];
char *pos;
size_t bufsize;
/*
* First check if the give name matches our full hostname.
*/
if (gethostname(buf, sizeof(buf)) < 0) {
pjdlog_errno(LOG_ERR, "gethostname() failed");
return (-1);
}
if (strcmp(buf, name) == 0)
return (1);
/*
* Now check if it matches first part of the host name.
*/
pos = strchr(buf, '.');
if (pos != NULL && (size_t)(pos - buf) == strlen(name) &&
strncmp(buf, name, pos - buf) == 0) {
return (1);
}
/*
* At the end check if name is equal to our host's UUID.
*/
bufsize = sizeof(buf);
if (sysctlbyname("kern.hostuuid", buf, &bufsize, NULL, 0) < 0) {
pjdlog_errno(LOG_ERR, "sysctlbyname(kern.hostuuid) failed");
return (-1);
}
if (strcasecmp(buf, name) == 0)
return (1);
/*
* Looks like this isn't about us.
*/
return (0);
}
static bool
family_supported(int family)
{
int sock;
sock = socket(family, SOCK_STREAM, 0);
if (sock == -1 && errno == EPROTONOSUPPORT)
return (false);
if (sock >= 0)
(void)close(sock);
return (true);
}
static int
node_names(char **namesp)
{
static char names[MAXHOSTNAMELEN * 3];
char buf[MAXHOSTNAMELEN];
char *pos;
size_t bufsize;
if (gethostname(buf, sizeof(buf)) < 0) {
pjdlog_errno(LOG_ERR, "gethostname() failed");
return (-1);
}
/* First component of the host name. */
pos = strchr(buf, '.');
if (pos != NULL && pos != buf) {
(void)strlcpy(names, buf, MIN((size_t)(pos - buf + 1),
sizeof(names)));
(void)strlcat(names, ", ", sizeof(names));
}
/* Full host name. */
(void)strlcat(names, buf, sizeof(names));
(void)strlcat(names, ", ", sizeof(names));
/* Host UUID. */
bufsize = sizeof(buf);
if (sysctlbyname("kern.hostuuid", buf, &bufsize, NULL, 0) < 0) {
pjdlog_errno(LOG_ERR, "sysctlbyname(kern.hostuuid) failed");
return (-1);
}
(void)strlcat(names, buf, sizeof(names));
*namesp = names;
return (0);
}
void
yyerror(const char *str)
{
pjdlog_error("Unable to parse configuration file at line %d near '%s': %s",
lineno, yytext, str);
}
struct hastd_config *
yy_config_parse(const char *config, bool exitonerror)
{
int ret;
curres = NULL;
mynode = false;
depth = 0;
lineno = 0;
depth0_timeout = HAST_TIMEOUT;
depth0_replication = HAST_REPLICATION_FULLSYNC;
depth0_checksum = HAST_CHECKSUM_NONE;
depth0_compression = HAST_COMPRESSION_HOLE;
strlcpy(depth0_control, HAST_CONTROL, sizeof(depth0_control));
TAILQ_INIT(&depth0_listen);
strlcpy(depth0_listen_tcp4, HASTD_LISTEN_TCP4,
sizeof(depth0_listen_tcp4));
strlcpy(depth0_listen_tcp6, HASTD_LISTEN_TCP6,
sizeof(depth0_listen_tcp6));
depth0_exec[0] = '\0';
depth0_metaflush = 1;
lconfig = calloc(1, sizeof(*lconfig));
if (lconfig == NULL) {
pjdlog_error("Unable to allocate memory for configuration.");
if (exitonerror)
exit(EX_TEMPFAIL);
return (NULL);
}
TAILQ_INIT(&lconfig->hc_listen);
TAILQ_INIT(&lconfig->hc_resources);
yyin = fopen(config, "r");
if (yyin == NULL) {
pjdlog_errno(LOG_ERR, "Unable to open configuration file %s",
config);
yy_config_free(lconfig);
if (exitonerror)
exit(EX_OSFILE);
return (NULL);
}
yyrestart(yyin);
ret = yyparse();
fclose(yyin);
if (ret != 0) {
yy_config_free(lconfig);
if (exitonerror)
exit(EX_CONFIG);
return (NULL);
}
/*
* Let's see if everything is set up.
*/
if (lconfig->hc_controladdr[0] == '\0') {
strlcpy(lconfig->hc_controladdr, depth0_control,
sizeof(lconfig->hc_controladdr));
}
if (!TAILQ_EMPTY(&depth0_listen))
TAILQ_CONCAT(&lconfig->hc_listen, &depth0_listen, hl_next);
if (TAILQ_EMPTY(&lconfig->hc_listen)) {
struct hastd_listen *lst;
if (family_supported(AF_INET)) {
lst = calloc(1, sizeof(*lst));
if (lst == NULL) {
pjdlog_error("Unable to allocate memory for listen address.");
yy_config_free(lconfig);
if (exitonerror)
exit(EX_TEMPFAIL);
return (NULL);
}
(void)strlcpy(lst->hl_addr, depth0_listen_tcp4,
sizeof(lst->hl_addr));
TAILQ_INSERT_TAIL(&lconfig->hc_listen, lst, hl_next);
} else {
pjdlog_debug(1,
"No IPv4 support in the kernel, not listening on IPv4 address.");
}
if (family_supported(AF_INET6)) {
lst = calloc(1, sizeof(*lst));
if (lst == NULL) {
pjdlog_error("Unable to allocate memory for listen address.");
yy_config_free(lconfig);
if (exitonerror)
exit(EX_TEMPFAIL);
return (NULL);
}
(void)strlcpy(lst->hl_addr, depth0_listen_tcp6,
sizeof(lst->hl_addr));
TAILQ_INSERT_TAIL(&lconfig->hc_listen, lst, hl_next);
} else {
pjdlog_debug(1,
"No IPv6 support in the kernel, not listening on IPv6 address.");
}
if (TAILQ_EMPTY(&lconfig->hc_listen)) {
pjdlog_error("No address to listen on.");
yy_config_free(lconfig);
if (exitonerror)
exit(EX_TEMPFAIL);
return (NULL);
}
}
TAILQ_FOREACH(curres, &lconfig->hc_resources, hr_next) {
PJDLOG_ASSERT(curres->hr_provname[0] != '\0');
PJDLOG_ASSERT(curres->hr_localpath[0] != '\0');
PJDLOG_ASSERT(curres->hr_remoteaddr[0] != '\0');
if (curres->hr_replication == -1) {
/*
* Replication is not set at resource-level.
* Use global or default setting.
*/
curres->hr_replication = depth0_replication;
}
if (curres->hr_replication == HAST_REPLICATION_MEMSYNC ||
curres->hr_replication == HAST_REPLICATION_ASYNC) {
pjdlog_warning("Replication mode \"%s\" is not implemented, falling back to \"%s\".",
curres->hr_replication == HAST_REPLICATION_MEMSYNC ?
"memsync" : "async", "fullsync");
curres->hr_replication = HAST_REPLICATION_FULLSYNC;
}
if (curres->hr_checksum == -1) {
/*
* Checksum is not set at resource-level.
* Use global or default setting.
*/
curres->hr_checksum = depth0_checksum;
}
if (curres->hr_compression == -1) {
/*
* Compression is not set at resource-level.
* Use global or default setting.
*/
curres->hr_compression = depth0_compression;
}
if (curres->hr_timeout == -1) {
/*
* Timeout is not set at resource-level.
* Use global or default setting.
*/
curres->hr_timeout = depth0_timeout;
}
if (curres->hr_exec[0] == '\0') {
/*
* Exec is not set at resource-level.
* Use global or default setting.
*/
strlcpy(curres->hr_exec, depth0_exec,
sizeof(curres->hr_exec));
}
if (curres->hr_metaflush == -1) {
/*
* Metaflush is not set at resource-level.
* Use global or default setting.
*/
curres->hr_metaflush = depth0_metaflush;
}
}
return (lconfig);
}
void
yy_config_free(struct hastd_config *config)
{
struct hastd_listen *lst;
struct hast_resource *res;
while ((lst = TAILQ_FIRST(&depth0_listen)) != NULL) {
TAILQ_REMOVE(&depth0_listen, lst, hl_next);
free(lst);
}
while ((lst = TAILQ_FIRST(&config->hc_listen)) != NULL) {
TAILQ_REMOVE(&config->hc_listen, lst, hl_next);
free(lst);
}
while ((res = TAILQ_FIRST(&config->hc_resources)) != NULL) {
TAILQ_REMOVE(&config->hc_resources, res, hr_next);
free(res);
}
free(config);
}
%}
%token CONTROL LISTEN PORT REPLICATION CHECKSUM COMPRESSION METAFLUSH
%token TIMEOUT EXEC EXTENTSIZE RESOURCE NAME LOCAL REMOTE SOURCE ON OFF
%token FULLSYNC MEMSYNC ASYNC NONE CRC32 SHA256 HOLE LZF
%token NUM STR OB CB
%type <str> remote_str
%type <num> replication_type
%type <num> checksum_type
%type <num> compression_type
%type <num> boolean
%union
{
int num;
char *str;
}
%token <num> NUM
%token <str> STR
%%
statements:
|
statements statement
;
statement:
control_statement
|
listen_statement
|
replication_statement
|
checksum_statement
|
compression_statement
|
timeout_statement
|
exec_statement
|
metaflush_statement
|
node_statement
|
resource_statement
;
control_statement: CONTROL STR
{
switch (depth) {
case 0:
if (strlcpy(depth0_control, $2,
sizeof(depth0_control)) >=
sizeof(depth0_control)) {
pjdlog_error("control argument is too long.");
free($2);
return (1);
}
break;
case 1:
if (!mynode)
break;
if (strlcpy(lconfig->hc_controladdr, $2,
sizeof(lconfig->hc_controladdr)) >=
sizeof(lconfig->hc_controladdr)) {
pjdlog_error("control argument is too long.");
free($2);
return (1);
}
break;
default:
PJDLOG_ABORT("control at wrong depth level");
}
free($2);
}
;
listen_statement: LISTEN STR
{
struct hastd_listen *lst;
lst = calloc(1, sizeof(*lst));
if (lst == NULL) {
pjdlog_error("Unable to allocate memory for listen address.");
free($2);
return (1);
}
if (strlcpy(lst->hl_addr, $2, sizeof(lst->hl_addr)) >=
sizeof(lst->hl_addr)) {
pjdlog_error("listen argument is too long.");
free($2);
free(lst);
return (1);
}
switch (depth) {
case 0:
TAILQ_INSERT_TAIL(&depth0_listen, lst, hl_next);
break;
case 1:
if (mynode)
TAILQ_INSERT_TAIL(&depth0_listen, lst, hl_next);
else
free(lst);
break;
default:
PJDLOG_ABORT("listen at wrong depth level");
}
free($2);
}
;
replication_statement: REPLICATION replication_type
{
switch (depth) {
case 0:
depth0_replication = $2;
break;
case 1:
PJDLOG_ASSERT(curres != NULL);
curres->hr_replication = $2;
break;
default:
PJDLOG_ABORT("replication at wrong depth level");
}
}
;
replication_type:
FULLSYNC { $$ = HAST_REPLICATION_FULLSYNC; }
|
MEMSYNC { $$ = HAST_REPLICATION_MEMSYNC; }
|
ASYNC { $$ = HAST_REPLICATION_ASYNC; }
;
checksum_statement: CHECKSUM checksum_type
{
switch (depth) {
case 0:
depth0_checksum = $2;
break;
case 1:
PJDLOG_ASSERT(curres != NULL);
curres->hr_checksum = $2;
break;
default:
PJDLOG_ABORT("checksum at wrong depth level");
}
}
;
checksum_type:
NONE { $$ = HAST_CHECKSUM_NONE; }
|
CRC32 { $$ = HAST_CHECKSUM_CRC32; }
|
SHA256 { $$ = HAST_CHECKSUM_SHA256; }
;
compression_statement: COMPRESSION compression_type
{
switch (depth) {
case 0:
depth0_compression = $2;
break;
case 1:
PJDLOG_ASSERT(curres != NULL);
curres->hr_compression = $2;
break;
default:
PJDLOG_ABORT("compression at wrong depth level");
}
}
;
compression_type:
NONE { $$ = HAST_COMPRESSION_NONE; }
|
HOLE { $$ = HAST_COMPRESSION_HOLE; }
|
LZF { $$ = HAST_COMPRESSION_LZF; }
;
timeout_statement: TIMEOUT NUM
{
if ($2 <= 0) {
pjdlog_error("Negative or zero timeout.");
return (1);
}
switch (depth) {
case 0:
depth0_timeout = $2;
break;
case 1:
PJDLOG_ASSERT(curres != NULL);
curres->hr_timeout = $2;
break;
default:
PJDLOG_ABORT("timeout at wrong depth level");
}
}
;
exec_statement: EXEC STR
{
switch (depth) {
case 0:
if (strlcpy(depth0_exec, $2, sizeof(depth0_exec)) >=
sizeof(depth0_exec)) {
pjdlog_error("Exec path is too long.");
free($2);
return (1);
}
break;
case 1:
PJDLOG_ASSERT(curres != NULL);
if (strlcpy(curres->hr_exec, $2,
sizeof(curres->hr_exec)) >=
sizeof(curres->hr_exec)) {
pjdlog_error("Exec path is too long.");
free($2);
return (1);
}
break;
default:
PJDLOG_ABORT("exec at wrong depth level");
}
free($2);
}
;
metaflush_statement: METAFLUSH boolean
{
switch (depth) {
case 0:
depth0_metaflush = $2;
break;
case 1:
PJDLOG_ASSERT(curres != NULL);
depth1_metaflush = $2;
break;
case 2:
if (!mynode)
break;
PJDLOG_ASSERT(curres != NULL);
curres->hr_metaflush = $2;
break;
default:
PJDLOG_ABORT("metaflush at wrong depth level");
}
}
;
boolean:
ON { $$ = 1; }
|
OFF { $$ = 0; }
;
node_statement: ON node_start OB node_entries CB
{
mynode = false;
}
;
node_start: STR
{
switch (isitme($1)) {
case -1:
free($1);
return (1);
case 0:
break;
case 1:
mynode = true;
break;
default:
PJDLOG_ABORT("invalid isitme() return value");
}
free($1);
}
;
node_entries:
|
node_entries node_entry
;
node_entry:
control_statement
|
listen_statement
;
resource_statement: RESOURCE resource_start OB resource_entries CB
{
if (curres != NULL) {
/*
* There must be section for this node, at least with
* remote address configuration.
*/
if (!hadmynode) {
char *names;
if (node_names(&names) != 0)
return (1);
pjdlog_error("No resource %s configuration for this node (acceptable node names: %s).",
curres->hr_name, names);
return (1);
}
/*
* Let's see if there are some resource-level settings
* that we can use for node-level settings.
*/
if (curres->hr_provname[0] == '\0' &&
depth1_provname[0] != '\0') {
/*
* Provider name is not set at node-level,
* but is set at resource-level, use it.
*/
strlcpy(curres->hr_provname, depth1_provname,
sizeof(curres->hr_provname));
}
if (curres->hr_localpath[0] == '\0' &&
depth1_localpath[0] != '\0') {
/*
* Path to local provider is not set at
* node-level, but is set at resource-level,
* use it.
*/
strlcpy(curres->hr_localpath, depth1_localpath,
sizeof(curres->hr_localpath));
}
if (curres->hr_metaflush == -1 && depth1_metaflush != -1) {
/*
* Metaflush is not set at node-level,
* but is set at resource-level, use it.
*/
curres->hr_metaflush = depth1_metaflush;
}
/*
* If provider name is not given, use resource name
* as provider name.
*/
if (curres->hr_provname[0] == '\0') {
strlcpy(curres->hr_provname, curres->hr_name,
sizeof(curres->hr_provname));
}
/*
* Remote address has to be configured at this point.
*/
if (curres->hr_remoteaddr[0] == '\0') {
pjdlog_error("Remote address not configured for resource %s.",
curres->hr_name);
return (1);
}
/*
* Path to local provider has to be configured at this
* point.
*/
if (curres->hr_localpath[0] == '\0') {
pjdlog_error("Path to local component not configured for resource %s.",
curres->hr_name);
return (1);
}
/* Put it onto resource list. */
TAILQ_INSERT_TAIL(&lconfig->hc_resources, curres, hr_next);
curres = NULL;
}
}
;
resource_start: STR
{
/* Check if there is no duplicate entry. */
TAILQ_FOREACH(curres, &lconfig->hc_resources, hr_next) {
if (strcmp(curres->hr_name, $1) == 0) {
pjdlog_error("Resource %s configured more than once.",
curres->hr_name);
free($1);
return (1);
}
}
/*
* Clear those, so we can tell if they were set at
* resource-level or not.
*/
depth1_provname[0] = '\0';
depth1_localpath[0] = '\0';
depth1_metaflush = -1;
hadmynode = false;
curres = calloc(1, sizeof(*curres));
if (curres == NULL) {
pjdlog_error("Unable to allocate memory for resource.");
free($1);
return (1);
}
if (strlcpy(curres->hr_name, $1,
sizeof(curres->hr_name)) >=
sizeof(curres->hr_name)) {
pjdlog_error("Resource name is too long.");
free($1);
return (1);
}
free($1);
curres->hr_role = HAST_ROLE_INIT;
curres->hr_previous_role = HAST_ROLE_INIT;
curres->hr_replication = -1;
curres->hr_checksum = -1;
curres->hr_compression = -1;
curres->hr_timeout = -1;
curres->hr_exec[0] = '\0';
curres->hr_provname[0] = '\0';
curres->hr_localpath[0] = '\0';
curres->hr_localfd = -1;
curres->hr_localflush = true;
curres->hr_metaflush = -1;
curres->hr_remoteaddr[0] = '\0';
curres->hr_sourceaddr[0] = '\0';
curres->hr_ggateunit = -1;
}
;
resource_entries:
|
resource_entries resource_entry
;
resource_entry:
replication_statement
|
checksum_statement
|
compression_statement
|
timeout_statement
|
exec_statement
|
metaflush_statement
|
name_statement
|
local_statement
|
resource_node_statement
;
name_statement: NAME STR
{
switch (depth) {
case 1:
if (strlcpy(depth1_provname, $2,
sizeof(depth1_provname)) >=
sizeof(depth1_provname)) {
pjdlog_error("name argument is too long.");
free($2);
return (1);
}
break;
case 2:
if (!mynode)
break;
PJDLOG_ASSERT(curres != NULL);
if (strlcpy(curres->hr_provname, $2,
sizeof(curres->hr_provname)) >=
sizeof(curres->hr_provname)) {
pjdlog_error("name argument is too long.");
free($2);
return (1);
}
break;
default:
PJDLOG_ABORT("name at wrong depth level");
}
free($2);
}
;
local_statement: LOCAL STR
{
switch (depth) {
case 1:
if (strlcpy(depth1_localpath, $2,
sizeof(depth1_localpath)) >=
sizeof(depth1_localpath)) {
pjdlog_error("local argument is too long.");
free($2);
return (1);
}
break;
case 2:
if (!mynode)
break;
PJDLOG_ASSERT(curres != NULL);
if (strlcpy(curres->hr_localpath, $2,
sizeof(curres->hr_localpath)) >=
sizeof(curres->hr_localpath)) {
pjdlog_error("local argument is too long.");
free($2);
return (1);
}
break;
default:
PJDLOG_ABORT("local at wrong depth level");
}
free($2);
}
;
resource_node_statement:ON resource_node_start OB resource_node_entries CB
{
mynode = false;
}
;
resource_node_start: STR
{
if (curres != NULL) {
switch (isitme($1)) {
case -1:
free($1);
return (1);
case 0:
break;
case 1:
mynode = hadmynode = true;
break;
default:
PJDLOG_ABORT("invalid isitme() return value");
}
}
free($1);
}
;
resource_node_entries:
|
resource_node_entries resource_node_entry
;
resource_node_entry:
name_statement
|
local_statement
|
remote_statement
|
source_statement
|
metaflush_statement
;
remote_statement: REMOTE remote_str
{
PJDLOG_ASSERT(depth == 2);
if (mynode) {
PJDLOG_ASSERT(curres != NULL);
if (strlcpy(curres->hr_remoteaddr, $2,
sizeof(curres->hr_remoteaddr)) >=
sizeof(curres->hr_remoteaddr)) {
pjdlog_error("remote argument is too long.");
free($2);
return (1);
}
}
free($2);
}
;
remote_str:
NONE { $$ = strdup("none"); }
|
STR { }
;
source_statement: SOURCE STR
{
PJDLOG_ASSERT(depth == 2);
if (mynode) {
PJDLOG_ASSERT(curres != NULL);
if (strlcpy(curres->hr_sourceaddr, $2,
sizeof(curres->hr_sourceaddr)) >=
sizeof(curres->hr_sourceaddr)) {
pjdlog_error("source argument is too long.");
free($2);
return (1);
}
}
free($2);
}
;