Commit 931d7365 authored by Marek Vavruša's avatar Marek Vavruša

daemon/worker: cleanup and fixed early memset

parent 3600b073
/* Dummy file, no real configuration here */
\ No newline at end of file
/* Dummy file, no real configuration here */
#define HAVE_ATTRIBUTE_COLD 1
#define HAVE_ATTRIBUTE_NORETURN 1
#define HAVE_ATTRIBUTE_PURE 1
#define HAVE_ATTRIBUTE_UNUSED 1
\ No newline at end of file
......@@ -87,7 +87,6 @@
#ifdef __GNUC__
#undef inline
#define NONRET __attribute__((noreturn)) /** Function does not return **/
#define UNUSED __attribute__((unused)) /** Variable/parameter is knowingly unused **/
#define CONSTRUCTOR __attribute__((constructor)) /** Call function upon start of program **/
......@@ -124,128 +123,8 @@
* === Basic logging functions (see <<log:,Logging>> and <ucw/log.h> for more)
***/
enum log_levels { /** The available log levels to pass to msg() and friends. **/
L_DEBUG=0, // 'D' - Debugging
L_INFO, // 'I' - Informational
L_WARN, // 'W' - Warning
L_ERROR, // 'E' - Error, but non-critical
L_INFO_R, // 'i' - An alternative set of levels for messages caused by remote events
L_WARN_R, // 'w' (e.g., a packet received via network)
L_ERROR_R, // 'e'
L_FATAL, // '!' - Fatal error
L_MAX
};
#define LOG_LEVEL_NAMES P(DEBUG) P(INFO) P(WARN) P(ERROR) P(INFO_R) P(WARN_R) P(ERROR_R) P(FATAL)
// Return the letter associated with a given severity level
#define LS_LEVEL_LETTER(level) ("DIWEiwe!###"[( level )])
#define L_SIGHANDLER 0x80000000 /** Avoid operations that are unsafe in signal handlers **/
#define L_LOGGER_ERR 0x40000000 /** Used internally to avoid infinite reporting of logging errors **/
/**
* This is the basic printf-like function for logging a message.
* The @flags contain the log level and possibly other flag bits (like `L_SIGHANDLER`).
**/
void msg(uint flags, const char *fmt, ...) FORMAT_CHECK(printf,2,3);
void vmsg(uint flags, const char *fmt, va_list args); /** A vararg version of msg(). **/
void die(const char *, ...) NONRET FORMAT_CHECK(printf,1,2); /** Log a fatal error message and exit the program. **/
void vdie(const char *fmt, va_list args) NONRET; /** va_list version of die() **/
extern char *log_title; /** An optional log message title. Set to program name by log_init(). **/
extern int log_pid; /** An optional PID printed in each log message. Set to 0 if it shouldn't be logged. **/
extern void (*log_die_hook)(void); /** An optional function called just before die() exists. **/ // API: log_die_hook
void log_init(const char *argv0); /** Set @log_title to the program name extracted from @argv[0]. **/
void log_fork(void); /** Call after fork() to update @log_pid. **/
void log_file(const char *name); /** Establish logging to the named file. Also redirect stderr there. **/
void assert_failed(const char *assertion, const char *file, int line) NONRET;
void assert_failed_msg(const char *assertion, const char *file, int line, const char *fmt, ...) NONRET FORMAT_CHECK(printf,4,5);
void assert_failed_noinfo(void) NONRET;
#ifdef DEBUG_ASSERTS
/**
* Check an assertion. If the condition @x is false, stop the program with a fatal error.
* Assertion checks are compiled only when `DEBUG_ASSERTS` is defined.
**/
#define ASSERT(x) ({ if (unlikely(!(x))) assert_failed(#x, __FILE__, __LINE__); 1; })
/**
* Check an assertion with a debug message. If the condition @cond is false,
* print the message and stop the program with fatal error.
* Assertion checks are compiled only when `DEBUG_ASSERTS` is defined.
**/
#define ASSERT_MSG(cond,str,x...) ({ if (unlikely(!(cond))) assert_failed_msg(#cond, __FILE__, __LINE__, str,##x); 1; })
#else
#define ASSERT(x) ({ if (__builtin_constant_p(x) && !(x)) assert_failed_noinfo(); 1; })
#define ASSERT_MSG(cond,str,x...) ASSERT(cond)
#endif
#define COMPILE_ASSERT(name,x) typedef char _COMPILE_ASSERT_##name[!!(x)-1]
#ifdef LOCAL_DEBUG
#define DBG(x,y...) msg(L_DEBUG, x,##y) /** If `LOCAL_DEBUG` is defined before including <ucw/lib.h>, log a debug message. Otherwise do nothing. **/
/**
* If `LOCAL_DEBUG` is defined before including <ucw/lib.h>, log current
* file name and line number. Otherwise do nothing.
**/
#define DBG_SPOT msg(L_DEBUG, "%s:%d (%s)", __FILE__, __LINE__, __func__)
#else
#define DBG(x,y...) do { } while(0)
#define DBG_SPOT do { } while(0)
#endif
#ifdef DEBUG_ASSERTS
/**
* Sometimes, we may want to check that a pointer points to a valid memory
* location before we start using it for anything more complicated. This
* macro checks pointer validity by reading the byte it points to.
**/
#define ASSERT_READABLE(ptr) ({ volatile char *__p = (ptr); *__p; })
/** Like the previous macro, but it checks writeability, too. **/
#define ASSERT_WRITEABLE(ptr) ({ volatile char *__p = (ptr); *__p = *__p; })
#else
#define ASSERT_READABLE(ptr) do { } while(0)
#define ASSERT_WRITEABLE(ptr) do { } while(0)
#endif
/*** === Memory allocation ***/
/*
* Unfortunately, several libraries we might want to link to define
* their own xmalloc and we don't want to interfere with them, hence
* the renaming.
*/
#define xmalloc ucw_xmalloc
#define xrealloc ucw_xrealloc
#define xfree ucw_xfree
void *xmalloc(size_t) LIKE_MALLOC; /** Allocate memory and die() if there is none. **/
void *xrealloc(void *, size_t); /** Reallocate memory and die() if there is none. **/
void xfree(void *); /** Free memory allocated by xmalloc() or xrealloc(). **/
void *xmalloc_zero(size_t) LIKE_MALLOC; /** Allocate memory and fill it by zeroes. **/
char *xstrdup(const char *) LIKE_MALLOC; /** Make a xmalloc()'ed copy of a string. Returns NULL for NULL string. **/
/* bigalloc.c */
void *page_alloc(u64 len) LIKE_MALLOC; // Internal: allocates a multiple of CPU_PAGE_SIZE bytes with mmap
void *page_alloc_zero(u64 len) LIKE_MALLOC;
void page_free(void *start, u64 len);
void *page_realloc(void *start, u64 old_len, u64 new_len);
void *big_alloc(u64 len) LIKE_MALLOC; /** Allocate a large memory block in the most efficient way available. **/
void *big_alloc_zero(u64 len) LIKE_MALLOC; /** Allocate and clear a large memory block. **/
void big_free(void *start, u64 len); /** Free block allocated by @big_alloc() or @big_alloc_zero(). **/
/*** === Random numbers (random.c) ***/
uint random_u32(void); /** Return a pseudorandom 32-bit number. **/
uint random_max(uint max); /** Return a pseudorandom 32-bit number in range [0,@max). **/
u64 random_u64(void); /** Return a pseudorandom 64-bit number. **/
u64 random_max_u64(u64 max); /** Return a pseudorandom 64-bit number in range [0,@max). **/
#define ASSERT(x)
#endif
......@@ -17,7 +17,8 @@
#include <uv.h>
#include <libknot/packet/pkt.h>
#include <libknot/internal/net.h>
#include <ucw/mempool.h>
#include <contrib/ucw/lib.h>
#include <contrib/ucw/mempool.h>
#if defined(__GLIBC__) && defined(_GNU_SOURCE)
#include <malloc.h>
#endif
......@@ -99,6 +100,15 @@ static int parse_query(knot_pkt_t *query)
static struct qr_task *qr_task_create(struct worker_ctx *worker, uv_handle_t *handle, knot_pkt_t *query, const struct sockaddr *addr)
{
/* How much can client handle? */
size_t answer_max = KNOT_WIRE_MIN_PKTSIZE;
if (!addr) { /* TCP */
answer_max = KNOT_WIRE_MAX_PKTSIZE;
} else if (knot_pkt_has_edns(query)) { /* EDNS */
answer_max = MAX(knot_edns_get_payload(query->opt_rr), KNOT_WIRE_MIN_PKTSIZE);
}
size_t pktbuf_max = MAX(KNOT_EDNS_MAX_UDP_PAYLOAD, answer_max);
/* Recycle available mempool if possible */
mm_ctx_t pool = {
.ctx = NULL,
......@@ -111,38 +121,15 @@ static struct qr_task *qr_task_create(struct worker_ctx *worker, uv_handle_t *ha
pool.ctx = mp_new (4 * CPU_PAGE_SIZE);
}
/* Create worker task */
/* Create resolution task */
struct engine *engine = worker->engine;
struct qr_task *task = mm_alloc(&pool, sizeof(*task));
memset(task, 0, sizeof(*task));
if (!task) {
mp_delete(pool.ctx);
return NULL;
}
task->worker = worker;
/* Create packet buffers for answer and subrequests */
task->req.pool = pool;
task->source.handle = handle;
if (addr) {
memcpy(&task->source.addr, addr, sockaddr_len(addr));
}
/* How much can client handle? */
size_t answer_max = KNOT_WIRE_MIN_PKTSIZE;
if (!addr) { /* TCP */
answer_max = KNOT_WIRE_MAX_PKTSIZE;
} else if (knot_pkt_has_edns(query)) { /* EDNS */
answer_max = knot_edns_get_payload(query->opt_rr);
if (answer_max < KNOT_WIRE_MIN_PKTSIZE) {
answer_max = KNOT_WIRE_MIN_PKTSIZE;
}
}
/* How much space do we need for intermediate packets? */
size_t pktbuf_max = KNOT_EDNS_MAX_UDP_PAYLOAD;
if (pktbuf_max < answer_max) {
pktbuf_max = answer_max;
}
/* Create buffers */
knot_pkt_t *pktbuf = knot_pkt_new(NULL, pktbuf_max, &task->req.pool);
knot_pkt_t *answer = knot_pkt_new(NULL, answer_max, &task->req.pool);
if (!pktbuf || !answer) {
......@@ -151,10 +138,20 @@ static struct qr_task *qr_task_create(struct worker_ctx *worker, uv_handle_t *ha
}
task->req.answer = answer;
task->next_query = pktbuf;
/* Start resolution */
task->next_handle = NULL;
task->iter_count = 0;
task->flags = 0;
task->worker = worker;
task->source.handle = handle;
uv_timer_init(worker->loop, &task->timeout);
task->timeout.data = task;
if (addr) {
memcpy(&task->source.addr, addr, sockaddr_len(addr));
} else {
task->source.addr.ip4.sin_family = AF_UNSPEC;
}
/* Start resolution */
kr_resolve_begin(&task->req, &engine->resolver, answer);
worker->stats.concurrent += 1;
return task;
......@@ -180,7 +177,7 @@ static void qr_task_free(uv_handle_t *handle)
}
#if defined(__GLIBC__) && defined(_GNU_SOURCE)
/* Decommit memory every once in a while */
static size_t mp_delete_count = 0;
static int mp_delete_count = 0;
if (++mp_delete_count == 100 * MP_FREELIST_SIZE) {
malloc_trim(0);
mp_delete_count = 0;
......@@ -322,7 +319,7 @@ static int qr_task_step(struct qr_task *task, knot_pkt_t *packet)
int state = kr_resolve_consume(&task->req, packet);
while (state == KNOT_STATE_PRODUCE) {
state = kr_resolve_produce(&task->req, &addr, &sock_type, next_query);
if (++task->iter_count > KR_ITER_LIMIT) {
if (unlikely(++task->iter_count > KR_ITER_LIMIT)) {
return qr_task_finalize(task, KNOT_STATE_FAIL);
}
}
......@@ -330,10 +327,7 @@ static int qr_task_step(struct qr_task *task, knot_pkt_t *packet)
/* We're done, no more iterations needed */
if (state & (KNOT_STATE_DONE|KNOT_STATE_FAIL)) {
return qr_task_finalize(task, state);
}
/* Not done, but no next address given. */
if (!addr || sock_type < 0) {
} else if (!addr || sock_type < 0) {
return qr_task_step(task, NULL);
}
......@@ -346,17 +340,17 @@ static int qr_task_step(struct qr_task *task, knot_pkt_t *packet)
/* Connect or issue query datagram */
io_create(task->worker->loop, task->next_handle, sock_type);
task->next_handle->data = task;
if (sock_type == SOCK_STREAM) {
if (sock_type == SOCK_DGRAM) {
if (qr_task_send(task, task->next_handle, addr, next_query) != 0) {
return qr_task_step(task, NULL);
}
} else {
struct ioreq *req = ioreq_take(task->worker);
if (!req || uv_tcp_connect(&req->as.connect, (uv_tcp_t *)task->next_handle, addr, on_connect) != 0) {
ioreq_release(task->worker, req);
return qr_task_step(task, NULL);
}
req->as.connect.data = task;
} else {
if (qr_task_send(task, task->next_handle, addr, next_query) != 0) {
return qr_task_step(task, NULL);
}
}
/* Start next step with timeout */
......
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