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fdlimit.patch
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From 4023c008cdc9fe777c5fb3c4332bf2588cfca79c Mon Sep 17 00:00:00 2001
From: Vitaly Potyarkin <[email protected]>
Date: Wed, 2 Jun 2021 14:59:15 +0300
Subject: [PATCH] Lift 1024 open files limit (switch to curl polling API)
Backported from https://github.com/transmission/transmission/pull/893
---
CMakeLists.txt | 2 +-
configure.ac | 2 +-
libtransmission/fdlimit.c | 26 --------------
libtransmission/web.c | 73 ++++++++++-----------------------------
4 files changed, 20 insertions(+), 83 deletions(-)
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 62bf87b..eb009d5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -97,7 +97,7 @@ string(SUBSTRING "${TR_VCS_REVISION}" 0 10 TR_VCS_REVISION)
set_property(GLOBAL PROPERTY USE_FOLDERS ON)
-set(CURL_MINIMUM 7.15.4)
+set(CURL_MINIMUM 7.28.0)
set(EVENT2_MINIMUM 2.0.10)
set(OPENSSL_MINIMUM 0.9.7)
set(CYASSL_MINIMUM 3.0)
diff --git a/configure.ac b/configure.ac
index 57d3cae..1a1058a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -39,7 +39,7 @@ AM_CONDITIONAL(HAVE_REVISION_FILE, test -f REVISION)
##
##
-CURL_MINIMUM=7.15.4
+CURL_MINIMUM=7.28.0
AC_SUBST(CURL_MINIMUM)
LIBEVENT_MINIMUM=2.0.10
AC_SUBST(LIBEVENT_MINIMUM)
diff --git a/libtransmission/fdlimit.c b/libtransmission/fdlimit.c
index 7886d17..bfdd492 100644
--- a/libtransmission/fdlimit.c
+++ b/libtransmission/fdlimit.c
@@ -10,11 +10,6 @@
#include <inttypes.h>
#include <string.h>
-#ifndef _WIN32
-#include <sys/time.h> /* getrlimit */
-#include <sys/resource.h> /* getrlimit */
-#endif
-
#include "transmission.h"
#include "error.h"
#include "error-types.h"
@@ -389,27 +384,6 @@ static void ensureSessionFdInfoExists(tr_session* session)
i = tr_new0(struct tr_fdInfo, 1);
fileset_construct(&i->fileset, FILE_CACHE_SIZE);
session->fdInfo = i;
-
-#ifndef _WIN32
-
- /* set the open-file limit to the largest safe size wrt FD_SETSIZE */
- struct rlimit limit;
-
- if (getrlimit(RLIMIT_NOFILE, &limit) == 0)
- {
- int const old_limit = (int)limit.rlim_cur;
- int const new_limit = MIN(limit.rlim_max, FD_SETSIZE);
-
- if (new_limit != old_limit)
- {
- limit.rlim_cur = new_limit;
- setrlimit(RLIMIT_NOFILE, &limit);
- getrlimit(RLIMIT_NOFILE, &limit);
- tr_logAddInfo("Changed open file limit from %d to %d", old_limit, (int)limit.rlim_cur);
- }
- }
-
-#endif
}
}
diff --git a/libtransmission/web.c b/libtransmission/web.c
index 744f576..4a12210 100644
--- a/libtransmission/web.c
+++ b/libtransmission/web.c
@@ -11,9 +11,6 @@
#ifdef _WIN32
#include <windows.h>
#include <wincrypt.h>
-#include <ws2tcpip.h>
-#else
-#include <sys/select.h>
#endif
#include <curl/curl.h>
@@ -391,41 +388,6 @@ struct tr_web_task* tr_webRunWebseed(tr_torrent* tor, char const* url, char cons
return tr_webRunImpl(tor->session, tr_torrentId(tor), url, range, NULL, done_func, done_func_user_data, buffer);
}
-/**
- * Portability wrapper for select().
- *
- * http://msdn.microsoft.com/en-us/library/ms740141%28VS.85%29.aspx
- * On win32, any two of the parameters, readfds, writefds, or exceptfds,
- * can be given as null. At least one must be non-null, and any non-null
- * descriptor set must contain at least one handle to a socket.
- */
-static void tr_select(int nfds, fd_set* r_fd_set, fd_set* w_fd_set, fd_set* c_fd_set, struct timeval* t)
-{
-#ifdef _WIN32
-
- (void)nfds;
-
- if (r_fd_set->fd_count == 0 && w_fd_set->fd_count == 0 && c_fd_set->fd_count == 0)
- {
- long int const msec = t->tv_sec * 1000 + t->tv_usec / 1000;
- tr_wait_msec(msec);
- }
- else if (select(0, r_fd_set->fd_count != 0 ? r_fd_set : NULL, w_fd_set->fd_count != 0 ? w_fd_set : NULL,
- c_fd_set->fd_count != 0 ? c_fd_set : NULL, t) == -1)
- {
- char errstr[512];
- int const e = EVUTIL_SOCKET_ERROR();
- tr_net_strerror(errstr, sizeof(errstr), e);
- dbgmsg("Error: select (%d) %s", e, errstr);
- }
-
-#else
-
- select(nfds, r_fd_set, w_fd_set, c_fd_set, t);
-
-#endif
-}
-
static void tr_webThreadFunc(void* vsession)
{
char* str;
@@ -434,6 +396,7 @@ static void tr_webThreadFunc(void* vsession)
int taskCount = 0;
struct tr_web_task* task;
tr_session* session = vsession;
+ uint32_t repeats = 0;
/* try to enable ssl for https support; but if that fails,
* try a plain vanilla init */
@@ -473,6 +436,7 @@ static void tr_webThreadFunc(void* vsession)
for (;;)
{
long msec;
+ int numfds;
int unused;
CURLMsg* msg;
CURLMcode mcode;
@@ -538,28 +502,27 @@ static void tr_webThreadFunc(void* vsession)
if (msec > 0)
{
- int usec;
- int max_fd;
- struct timeval t;
- fd_set r_fd_set;
- fd_set w_fd_set;
- fd_set c_fd_set;
-
- max_fd = 0;
- FD_ZERO(&r_fd_set);
- FD_ZERO(&w_fd_set);
- FD_ZERO(&c_fd_set);
- curl_multi_fdset(multi, &r_fd_set, &w_fd_set, &c_fd_set, &max_fd);
-
if (msec > THREADFUNC_MAX_SLEEP_MSEC)
{
msec = THREADFUNC_MAX_SLEEP_MSEC;
}
- usec = msec * 1000;
- t.tv_sec = usec / 1000000;
- t.tv_usec = usec % 1000000;
- tr_select(max_fd + 1, &r_fd_set, &w_fd_set, &c_fd_set, &t);
+ curl_multi_wait(multi, NULL, 0, msec, &numfds);
+ if (!numfds)
+ {
+ repeats++;
+ if (repeats > 1)
+ {
+ /* curl_multi_wait() returns immediately if there are
+ * no fds to wait for, so we need an explicit wait here
+ * to emulate select() behavior */
+ tr_wait_msec(MIN(msec, THREADFUNC_MAX_SLEEP_MSEC / 2));
+ }
+ }
+ else
+ {
+ repeats = 0;
+ }
}
/* call curl_multi_perform() */
--
2.30.2.windows.1