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ru.linux
- RU.LINUX ---------------------------------------------------------------------
From : Sergey A. Cherukhin 2:5020/400 22 Dec 2004 08:58:17
To : Eugene B. Berdnikov
Subject : Re: Так причина битья определилась ? (Бьются большие файлы при закачке.
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"Eugene B. Berdnikov" <berd@desert.ihep.su> wrote in message
news:986aqc.ftb.ln@protva.ru...
> Alex Korchmar <hue-moe@so.yandex.ru> wrote:
> AK> Eugene B. Berdnikov <berd@desert.ihep.su> wrote:
> AK>
> EBB>> Т.е. файл залить на сервер теперь нельзя, но "на работу это не
влияет"?
> AK> как я понимаю, залить файл _по_udp_ без обертки и раньше было нельзя,
> AK> но с другой диагностикой.
Файл по UDP не получалось залить и раньше, и сейчас. Проверял так: на
сервере запускал nc слушать UDP на 20000 порту и с другого компа подключался
nc, на stdin которого посылал передаваемый файл. Затем на сервере проверял
размер принятого файла. Когда размер переставал увеличиваться, нажимал ^C с
обеих сторон и смотрел, сколько байт передано и принято. Передающая сторона
показывала что ушли все байты, а принимаюшая показывала меньшую цифру.
После замены драйвера e100 на eepro100 nc _со стороны сервера_ стал вылетать
с воплем "Resource temporarily unavailable", но _не всегда_, в части случаев
поведение такое-же как и с e100 (т.е. доходят не все пакеты).
>
> Да и откуда вообще udp взялся, если исходно речь о tcp шла?
А я хотел убедиться что дело не в реализации проверки контрольной суммы TCP,
а в чем-то другом (в карте или драйвере). Если бы файл по UDP залился
нормально, это однозначно бы указывало на баг в реализации TCP.
>
> В общем, strace nc, но и tcpdump такого диковинного момента со сторонней
машины
> не мешало бы рассмотреть.
Вот вывод strace:
execve("/usr/bin/nc", ["nc", "-v", "-v", "-v", "-u", "-l", "-p", "20000"],
[/* 21 vars */]) = 0
uname({sys="Linux", node="server.internal", ...}) = 0
brk(0) = 0x804c364
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
= 0x40013000
open("/etc/ld.so.preload", O_RDONLY) = -1 ENOENT (No such file or
directory)
open("/etc/ld.so.cache", O_RDONLY) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=13889, ...}) = 0
old_mmap(NULL, 13889, PROT_READ, MAP_PRIVATE, 3, 0) = 0x40014000
close(3) = 0
open("/lib/libc.so.6", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0XW\1\000"..., 512) =
512
fstat64(3, {st_mode=S_IFREG|0755, st_size=1197344, ...}) = 0
old_mmap(NULL, 1207332, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x40018000
old_mmap(0x40139000, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3,
0x120000) = 0x40139000
old_mmap(0x4013c000, 11300, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x4013c000
close(3) = 0
munmap(0x40014000, 13889) = 0
open("/dev/urandom", O_RDONLY) = 3
read(3, "\214\274C(b3P\362qB\31\262\315\177\6\234%\351I\227\273"..., 256) =
256
close(3) = 0
open("/dev/urandom", O_RDONLY) = 3
read(3, "\206\366\353\33\302\307\306YM\306\27\244+\337mxo\225\206"..., 136)
= 136
close(3) = 0
brk(0) = 0x804c364
brk(0x804d364) = 0x804d364
brk(0) = 0x804d364
brk(0x804e000) = 0x804e000
open("/etc/resolv.conf", O_RDONLY) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=108, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
= 0x40014000
read(3, "# MADE-BY-RP-PPPOE\ndomain intern"..., 4096) = 108
read(3, "", 4096) = 0
close(3) = 0
munmap(0x40014000, 4096) = 0
brk(0) = 0x804e000
brk(0x804f000) = 0x804f000
brk(0) = 0x804f000
brk(0x8051000) = 0x8051000
rt_sigaction(SIGINT, {0x8048ff0, [INT], SA_RESTORER|SA_RESTART, 0x4003ee38},
{SIG_DFL}, 8) = 0
rt_sigaction(SIGQUIT, {0x8048ff0, [QUIT], SA_RESTORER|SA_RESTART,
0x4003ee38}, {SIG_DFL}, 8) = 0
rt_sigaction(SIGTERM, {0x8048ff0, [TERM], SA_RESTORER|SA_RESTART,
0x4003ee38}, {SIG_DFL}, 8) = 0
rt_sigaction(SIGURG, {SIG_IGN}, {SIG_DFL}, 8) = 0
rt_sigaction(SIGPIPE, {SIG_IGN}, {SIG_DFL}, 8) = 0
open("/etc/nsswitch.conf", O_RDONLY) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=1696, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
= 0x40014000
read(3, "#\n# /etc/nsswitch.conf\n#\n# An ex"..., 4096) = 1696
brk(0) = 0x8051000
brk(0x8052000) = 0x8052000
read(3, "", 4096) = 0
close(3) = 0
munmap(0x40014000, 4096) = 0
open("/etc/ld.so.cache", O_RDONLY) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=13889, ...}) = 0
old_mmap(NULL, 13889, PROT_READ, MAP_PRIVATE, 3, 0) = 0x40014000
close(3) = 0
open("/lib/libnss_files.so.2", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\320\34"..., 512) =
512
fstat64(3, {st_mode=S_IFREG|0755, st_size=41408, ...}) = 0
old_mmap(NULL, 44700, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x4013f000
old_mmap(0x40149000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3,
0x9000) = 0x40149000
close(3) = 0
munmap(0x40014000, 13889) = 0
open("/etc/services", O_RDONLY) = 3
fcntl64(3, F_GETFD) = 0
fcntl64(3, F_SETFD, FD_CLOEXEC) = 0
fstat64(3, {st_mode=S_IFREG|0644, st_size=19935, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
= 0x40014000
read(3, "# /etc/services:\n# $Id: services"..., 4096) = 4096
read(3, "BIOS Name Service\nnetbios-ns\t137"..., 4096) = 4096
read(3, "cs\t\t994/udp\npop3s\t\t995/tcp\t\t\t\t# "..., 4096) = 4096
read(3, "de effect\ncodasrv\t\t2432/tcp\t\t\t# "..., 4096) = 4096
read(3, "\t2/ddp\t\t\t\t# Name Binding Protoco"..., 4096) = 3551
read(3, "", 4096) = 0
close(3) = 0
munmap(0x40014000, 4096) = 0
socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP) = 3
setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
bind(3, {sa_family=AF_INET, sin_port=htons(20000),
sin_addr=inet_addr("0.0.0.0")}, 16) = 0
getsockname(3, {sa_family=AF_INET, sin_port=htons(20000),
sin_addr=inet_addr("0.0.0.0")}, [16]) = 0
write(2, "listening on [any] 20000 ...", 28) = 28
write(2, "\n", 1) = 1
rt_sigaction(SIGALRM, {SIG_IGN}, {SIG_DFL}, 8) = 0
alarm(0) = 0
recvfrom(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...,
8192, MSG_PEEK, {sa_family=AF_INET, sin_port=htons(1372),
sin_addr=inet_addr("192.168.5.1")}, [16]) = 8192
rt_sigaction(SIGALRM, {SIG_IGN}, {SIG_IGN}, 8) = 0
alarm(0) = 0
connect(3, {sa_family=AF_INET, sin_port=htons(1372),
sin_addr=inet_addr("192.168.5.1")}, 16) = 0
getsockopt(3, SOL_IP, IP_OPTIONS, "", [0]) = 0
getsockname(3, {sa_family=AF_INET, sin_port=htons(20000),
sin_addr=inet_addr("192.168.5.2")}, [16]) = 0
socket(PF_UNIX, SOCK_STREAM, 0) = 4
connect(4, {sa_family=AF_UNIX, path="/var/run/.nscd_socket"}, 110) = -1
ENOENT (No such file or directory)
close(4) = 0
open("/etc/host.conf", O_RDONLY) = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=17, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
= 0x40014000
read(4, "order hosts,bind\n", 4096) = 17
read(4, "", 4096) = 0
close(4) = 0
munmap(0x40014000, 4096) = 0
open("/etc/hosts", O_RDONLY) = 4
fcntl64(4, F_GETFD) = 0
fcntl64(4, F_SETFD, FD_CLOEXEC) = 0
fstat64(4, {st_mode=S_IFREG|0644, st_size=62, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
= 0x40014000
read(4, "127.0.0.1 localhost.localdomain"..., 4096) = 62
read(4, "", 4096) = 0
close(4) = 0
munmap(0x40014000, 4096) = 0
open("/etc/ld.so.cache", O_RDONLY) = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=13889, ...}) = 0
old_mmap(NULL, 13889, PROT_READ, MAP_PRIVATE, 4, 0) = 0x40014000
close(4) = 0
open("/lib/libnss_dns.so.2", O_RDONLY) = 4
read(4, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\\\16\0"..., 512) =
512
fstat64(4, {st_mode=S_IFREG|0755, st_size=13424, ...}) = 0
old_mmap(NULL, 16240, PROT_READ|PROT_EXEC, MAP_PRIVATE, 4, 0) = 0x4014a000
old_mmap(0x4014d000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 4,
0x2000) = 0x4014d000
close(4) = 0
open("/lib/libresolv.so.2", O_RDONLY) = 4
read(4, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\330*\0"..., 512) =
512
fstat64(4, {st_mode=S_IFREG|0755, st_size=57732, ...}) = 0
old_mmap(NULL, 71216, PROT_READ|PROT_EXEC, MAP_PRIVATE, 4, 0) = 0x4014e000
old_mmap(0x4015c000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 4,
0xd000) = 0x4015c000
old_mmap(0x4015d000, 9776, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x4015d000
close(4) = 0
munmap(0x40014000, 13889) = 0
open("/dev/urandom", O_RDONLY) = 4
read(4, "b\226\201\252\200$q\'u\3109\"\311\20\35c\276\233L\334\361"..., 256)
= 256
close(4) = 0
open("/dev/urandom", O_RDONLY) = 4
read(4, "\320b\355\303p\31V1\"\261\350\321Ww\341\312\37\216\34}"..., 136) =
136
close(4) = 0
socket(PF_INET, SOCK_DGRAM, IPPROTO_IP) = 4
connect(4, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("192.168.5.2")}, 28) = 0
send(4, "K\332\1\0\0\1\0\0\0\0\0\0\0011\0015\003168\003192\7in-"..., 42, 0)
= 42
gettimeofday({1103688092, 868476}, NULL) = 0
poll([{fd=4, events=POLLIN, revents=POLLIN}], 1, 5000) = 1
ioctl(4, FIONREAD, [95]) = 0
recvfrom(4, "K\332\205\200\0\1\0\1\0\1\0\0\0011\0015\003168\003192\7"...,
1024, 0, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("192.168.5.2")}, [16]) = 95
close(4) = 0
brk(0) = 0x8052000
brk(0x8053000) = 0x8053000
socket(PF_UNIX, SOCK_STREAM, 0) = 4
connect(4, {sa_family=AF_UNIX, path="/var/run/.nscd_socket"}, 110) = -1
ENOENT (No such file or directory)
close(4) = 0
open("/etc/hosts", O_RDONLY) = 4
fcntl64(4, F_GETFD) = 0
fcntl64(4, F_SETFD, FD_CLOEXEC) = 0
fstat64(4, {st_mode=S_IFREG|0644, st_size=62, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
= 0x40014000
read(4, "127.0.0.1 localhost.localdomain"..., 4096) = 62
read(4, "", 4096) = 0
close(4) = 0
munmap(0x40014000, 4096) = 0
socket(PF_INET, SOCK_DGRAM, IPPROTO_IP) = 4
connect(4, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("192.168.5.2")}, 28) = 0
send(4, "&\26\1\0\0\1\0\0\0\0\0\0\2gw\10internal\0\0\1\0\1", 29, 0) = 29
gettimeofday({1103688092, 885287}, NULL) = 0
poll([{fd=4, events=POLLIN, revents=POLLIN}], 1, 5000) = 1
ioctl(4, FIONREAD, [78]) = 0
recvfrom(4, "&\26\205\200\0\1\0\1\0\1\0\1\2gw\10internal\0\0\1\0\1\300"...,
1024, 0, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("192.168.5.2")}, [16]) = 78
close(4) = 0
write(2, "connect to [192.168.5.2] from gw"..., 60) = 60
write(2, "\n", 1) = 1
select(16, [0 3], NULL, NULL, NULL) = 1 (in [3])
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 8192) =
8192
write(1, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 8192)
= 8192
select(16, [0 3], NULL, NULL, NULL) = 1 (in [3])
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 8192) =
8192
write(1, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 8192)
= 8192
...
...
...
select(16, [0 3], NULL, NULL, NULL) = 1 (in [3])
read(3, "@\205\300t(\213D$\24\211E\f\213\213\224\0\0\0Q\350hG\0"..., 8192) =
8192
write(1, "@\205\300t(\213D$\24\211E\f\213\213\224\0\0\0Q\350hG\0"..., 8192)
= 8192
select(16, [0 3], NULL, NULL, NULL) = 1 (in [3])
read(3, 0x804e3a8, 8192) = -1 EAGAIN (Resource temporarily
unavailable)
close(3) = 0
write(2, " sent 0, rcvd 81641472", 22) = 22
write(2, " : Resource temporarily unavaila"..., 36) = 36
exit_group(0) = ?
Поскольку никаким O_NONBLOCK и не пахнет, могу сделать предположение, что не
хватает памяти под буфера в ядре.
--
WBW
Sergey A. Cherukhin
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