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failed to call nfs_mount using the qt program (compilation kit qt5.15.2 msvc2019 64 bit) on window #511

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JieBinCao opened this issue Dec 26, 2024 · 27 comments
Open

failed to call nfs_mount using the qt program (compilation kit qt5.15.2 msvc2019 64 bit) on window #511

JieBinCao opened this issue Dec 26, 2024 · 27 comments

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@JieBinCao
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I failed to call nfs_mount using the qt program (compilation kit qt5.15.2 msvc2019 64 bit) on window, with a status code of -5 and error message: nfs_service failed， How to solve the problem that both ends of the network can be pinged? The RPC information of my Linux server is as follows:
program vers proto port service
100000 4 tcp 111
100000 3 tcp 111
100000 2 tcp 111
100000 4 udp 111
100000 3 udp 111
100000 2 udp 111
100024 1 udp 42449
100024 1 tcp 50421
100003 3 tcp 2049
100021 1 udp 36680
100021 3 udp 36680
100021 4 udp 36680
100021 1 tcp 33051
100021 3 tcp 33051
100021 4 tcp 33051
100005 1 udp 35199
100005 1 tcp 58483
100005 2 udp 50381
100005 2 tcp 35065
100005 3 udp 56087
100005 3 tcp 42365
My code snippet is as follows:
WSADATA wsaData;
#ifdef WIN32
if (WSAStartup(MAKEWORD(2,2), &wsaData) != 0) {
printf("Failed to start Winsock2\n");
return;
}
#endif
struct nfs_context *nfs = NULL;
struct nfsfh *nfsfh = NULL;
struct nfs_url *url = NULL;
struct nfsdir *nfsdir;
nfs = nfs_init_context();
if (nfs == NULL) {
printf("failed to init context\n");
return;
}
nfs_set_version(nfs, 3);
QString fp = "nfs://192.168.xxx.xxx/home/user/";
url = nfs_parse_url_full(nfs, fp.toStdString().c_str());
if (url == NULL) {
fprintf(stderr, "%s\n", nfs_get_error(nfs));
return;
}
int ret = nfs_mount(nfs, url->server, url->path);
if ( ret != 0) {
fprintf(stderr,"return ret: %d \n\r",ret);
fprintf(stderr, "Failed to mount nfs share : %s\n", nfs_get_error(nfs));
return;
}
@JieBinCao
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The error message for tracking RPC is: Read from socket(1120) failed, errno:10057 (Unknown error). Closing socket.

@JieBinCao
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I added this sentence to the above code snippet: nfs_set_mountport(nfs, 2049); After returning a -14 status code, the breakpoint was traced and entered into the rpc_process_deply interface implemented in pdu. c at the following location: case PROG_UNAVAIL:
status = RPC_STATUS_ERROR;
data = "Server responded: Program not available";

@sahlberg
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Collect a network trace with wireshark.

Generally, PROG_UNAVAIL means that either NFS or Portmapper is not configured/running on the server.

Run "rpcinfo" on the server. It should list a whole bunch of program such as:
100003 3 tcp 0.0.0.0.8.1 nfs superuser
100003 4 tcp 0.0.0.0.8.1 nfs superuser
and other stuff.

@JieBinCao
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Collect a network trace with wireshark.

Generally, PROG_UNAVAIL means that either NFS or Portmapper is not configured/running on the server.

Run "rpcinfo" on the server. It should list a whole bunch of program such as: 100003 3 tcp 0.0.0.0.8.1 nfs superuser 100003 4 tcp 0.0.0.0.8.1 nfs superuser and other stuff.

The result of running the 'rpcinfo' command is as follows:
program version netid address service owner
100000 4 tcp6 ::.0.111 - superuser
100000 3 tcp6 ::.0.111 - superuser
100000 4 udp6 ::.0.111 - superuser
100000 3 udp6 ::.0.111 - superuser
100000 4 tcp 0.0.0.0.0.111 - superuser
100000 3 tcp 0.0.0.0.0.111 - superuser
100000 2 tcp 0.0.0.0.0.111 - superuser
100000 4 udp 0.0.0.0.0.111 - superuser
100000 3 udp 0.0.0.0.0.111 - superuser
100000 2 udp 0.0.0.0.0.111 - superuser
100000 4 local /var/run/rpcbind.sock - superuser
100000 3 local /var/run/rpcbind.sock - superuser
100024 1 udp 0.0.0.0.165.209 - superuser
100024 1 tcp 0.0.0.0.196.245 - superuser
100024 1 udp6 ::.209.41 - superuser
100024 1 tcp6 ::.207.181 - superuser
100003 3 tcp 0.0.0.0.8.1 - superuser
100003 3 tcp6 ::.8.1 - superuser
100021 1 udp 0.0.0.0.143.72 - superuser
100021 3 udp 0.0.0.0.143.72 - superuser
100021 4 udp 0.0.0.0.143.72 - superuser
100021 1 tcp 0.0.0.0.129.27 - superuser
100021 3 tcp 0.0.0.0.129.27 - superuser
100021 4 tcp 0.0.0.0.129.27 - superuser
100021 1 udp6 ::.233.242 - superuser
100021 3 udp6 ::.233.242 - superuser
100021 4 udp6 ::.233.242 - superuser
100021 1 tcp6 ::.141.243 - superuser
100021 3 tcp6 ::.141.243 - superuser
100021 4 tcp6 ::.141.243 - superuser
100005 1 udp 0.0.0.0.137.127 - superuser
100005 1 tcp 0.0.0.0.228.115 - superuser
100005 1 udp6 ::.180.247 - superuser
100005 1 tcp6 ::.179.103 - superuser
100005 2 udp 0.0.0.0.196.205 - superuser
100005 2 tcp 0.0.0.0.136.249 - superuser
100005 2 udp6 ::.196.221 - superuser
100005 2 tcp6 ::.142.223 - superuser
100005 3 udp 0.0.0.0.219.23 - superuser
100005 3 tcp 0.0.0.0.165.125 - superuser
100005 3 udp6 ::.151.137 - superuser
100005 3 tcp6 ::.227.71 - superuser

It seems to have NFS or Portmapper configured/running.
Strangely enough, I can mount it normally using the NFS client that comes with my Windows computer.This is a bit confusing.

@sahlberg
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Ok. Collect a network trace with wireshark when you try to mount the share and I can have a look.

@JieBinCao
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Author

Ok. Collect a network trace with wireshark when you try to mount the share and I can have a look.
I've collected the network trace with Wireshark. Here it is for your review.
20250102133032
Could you please help me analyze what caused it? Thank you!

@sundermann sundermann mentioned this issue Jan 9, 2025
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7 tasks
@kambala-decapitator
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kambala-decapitator commented Jan 10, 2025 •
edited
Loading

seeing the same issue with v6, but only on Windows. Android and macOS were confirmed to work correctly. Issue observed in Kodi, see the link just above this comment. To be precise: with v5.0.2 all's fine, with v6.0.2 the issue is reproducible,

@sahlberg
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Ok. Collect a network trace with wireshark when you try to mount the share and I can have a look.
I've collected the network trace with Wireshark. Here it is for your review.
20250102133032
Could you please help me analyze what caused it? Thank you!

Can you send me the actual network trace. Not a screenshot of it but the pcap file that wireshark created.

@kambala-decapitator
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@sahlberg here you go. NFS server is at 192.168.1.100
nfs.pcapng.gz

@JieBinCao
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Ok. Collect a network trace with wireshark when you try to mount the share and I can have a look.
I've collected the network trace with Wireshark. Here it is for your review.
20250102133032
Could you please help me analyze what caused it? Thank you!

Can you send me the actual network trace. Not a screenshot of it but the pcap file that wireshark created.

OK.This is the collected network tracking file：
tracking.zip

@sahlberg
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sahlberg commented Jan 13, 2025 via email

@JieBinCao
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Looks like a configuration error in your environment. Look at packet 133. The server responds to the MOUNT NULL procedure. Open the "Remote Procedure Call" expansion and look at the last line : "Accept state: remote hasn't exported program"
…
On Mon, 13 Jan 2025 at 13:20, JieBinCao @.> wrote: Ok. Collect a network trace with wireshark when you try to mount the share and I can have a look. I've collected the network trace with Wireshark. Here it is for your review. [image: 20250102133032] https://private-user-images.githubusercontent.com/42132793/399620105-b04b536f-518f-490f-a30a-a661bf2ef314.png?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.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.TiBCODq5p_0zUzAO0ul7ttPjwW5cjNueLnXVfR4hGWo Could you please help me analyze what caused it? Thank you! Can you send me the actual network trace. Not a screenshot of it but the pcap file that wireshark created. OK.This is the collected network tracking file： tracking.zip https://github.com/user-attachments/files/18392394/tracking.zip — Reply to this email directly, view it on GitHub <#511 (comment)>, or unsubscribe https://github.com/notifications/unsubscribe-auth/AADY3EALXOSAXFUXVBREQR32KMWGPAVCNFSM6AAAAABUG22V2OVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDKOBWGEYDGNJYHA . You are receiving this because you were mentioned.Message ID: @.>

OK.My code is written like this, can you help me analyze where the problem occurred?
`void MainWindow::doReadFile(){
WSADATA wsaData;
#ifdef WIN32
if (WSAStartup(MAKEWORD(2,2), &wsaData) != 0) {
printf("Failed to start Winsock2\n");
return;
}
#endif

struct nfs_context *nfs = NULL;
struct nfs_url *url = NULL;

nfs = nfs_init_context();
if (nfs == NULL) {
    printf("failed to init context\n");
    return;
}
nfs_set_version(nfs, 3);

nfs_set_autoreconnect(nfs, -1);
nfs_set_mountport(nfs, 2049);

QString fp = "nfs://192.168.100.12/home/user/";

url = nfs_parse_url_full(nfs, fp.toStdString().c_str());
if (url == NULL) {
    fprintf(stderr, "%s\n", nfs_get_error(nfs));
    return;
}
int ret = nfs_mount(nfs, url->server, url->path);
if ( ret != 0) {
    fprintf(stderr,"return ret: %d \n\r",ret);
    fprintf(stderr, "Failed to mount nfs share : %s\n", nfs_get_error(nfs));
    return;
}

}`

@sahlberg
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sahlberg commented Jan 13, 2025 via email

@JieBinCao
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Get rid of this : nfs_set_mountport(nfs, 2049); The mount program is very likely not running on 2049 but on an ephemeral port.

Get rid of this :
nfs_set_countport (nfs, 2049);
Report this issue: nfs_service failed

@kambala-decapitator
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Looks like a configuration error in your environment. Look at packet 133. The server responds to the MOUNT NULL procedure. Open the "Remote Procedure Call" expansion and look at the last line : "Accept state: remote hasn't exported program"

why does the issue manifest only on Windows but not on macOS / Android?

@kambala-decapitator
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kambala-decapitator commented Jan 13, 2025 •
edited
Loading

as far as I can see, in Kodi the only windows-specific code is a few defines that are used here: https://github.com/xbmc/xbmc/blob/e7e6ee63bf222e4a5896598d5520dd509dbaef1d/xbmc/filesystem/NFSFile.cpp#L947

ret = nfs_creat(m_pNfsContext, filename.c_str(), S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH, &m_pFileHandle);

the defines are: https://github.com/xbmc/xbmc/blob/e7e6ee63bf222e4a5896598d5520dd509dbaef1d/xbmc/filesystem/NFSFile.cpp#L35-L40

#define S_IRGRP 0
#define S_IROTH 0
#define S_IWUSR _S_IWRITE
#define S_IRUSR _S_IREAD

and there's no nfs_set_mountport call

@JieBinCao
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seeing the same issue with v6, but only on Windows. Android and macOS were confirmed to work correctly. Issue observed in Kodi, see the link just above this comment. To be precise: with v5.0.2 all's fine, with v6.0.2 the issue is reproducible,

Indeed, everything was normal in v5.0.2, but in v6.0.2, this issue is reproducible

@sahlberg
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So, I can't compile on windows and visual studio online must be the most clunky and insane development environment ever created. May god have mercy on people forced to use it :-)

So, unless we get someone that can actually build and debug on windows we will have to do it the hard way :-(
I will send updated versions of libnfs with debug statements, and someone of you need to build and test it.

Please test the debug-511 branch. It will print a bunch of lines of what is happening in rpc_service() which is where all the socket stuff happens.
Please send me all the outputs of this as well as a wiresharp pcap file of when your test application runs and fails.

@JieBinCao
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as far as I can see, in Kodi the only windows-specific code is a few defines that are used here: https://github.com/xbmc/xbmc/blob/e7e6ee63bf222e4a5896598d5520dd509dbaef1d/xbmc/filesystem/NFSFile.cpp#L947

ret = nfs_creat(m_pNfsContext, filename.c_str(), S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH, &m_pFileHandle);

the defines are: https://github.com/xbmc/xbmc/blob/e7e6ee63bf222e4a5896598d5520dd509dbaef1d/xbmc/filesystem/NFSFile.cpp#L35-L40

#define S_IRGRP 0
#define S_IROTH 0
#define S_IWUSR _S_IWRITE
#define S_IRUSR _S_IREAD

and there's no callnfs_set_mountport

Hello! After successfully calling nfs_mount, can I create a symbolic link in a certain path on my computer, such as D:/home? If possible, in the future, when using the program to read files, I can directly read files through the path, because I do not have relevant user experience. Can you guide me on how to use it?

@sahlberg
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sahlberg commented Jan 14, 2025 via email

@JieBinCao
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no, you can not have a link to D:..in nfs. Windows does not have soft-links in the same sense as unix has. In posix, links are evaluated on the client-side which does not map that well to windows where their "links" are evaluated on the server side. So if you had a link from "somewhere" to D:\foo, then "D:\foo" is would be passed to the nfs client which would have no idea what D: even is and thus can not follow the link. Don;t use links or reparse points with nfs. does nfs_mount() work for you now? If not, run your test program with the debug-511 branch of libnfs. Send me all the output it prints to the terminal window and also a wiresharp pcap network trace when you do it and I can have a look.
…
On Tue, 14 Jan 2025 at 21:51, JieBinCao @.> wrote: as far as I can see, in Kodi the only windows-specific code is a few defines that are used here: https://github.com/xbmc/xbmc/blob/e7e6ee63bf222e4a5896598d5520dd509dbaef1d/xbmc/filesystem/NFSFile.cpp#L947 ret = nfs_creat(m_pNfsContext, filename.c_str(), S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH, &m_pFileHandle); the defines are: https://github.com/xbmc/xbmc/blob/e7e6ee63bf222e4a5896598d5520dd509dbaef1d/xbmc/filesystem/NFSFile.cpp#L35-L40 #define S_IRGRP 0 #define S_IROTH 0 #define S_IWUSR _S_IWRITE #define S_IRUSR _S_IREAD and there's no callnfs_set_mountport Hello! After successfully calling nfs_mount, can I create a symbolic link in a certain path on my computer, such as D:/home? If possible, in the future, when using the program to read files, I can directly read files through the path, because I do not have relevant user experience. Can you guide me on how to use it? — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you were mentioned.Message ID: @.>

Thank you, I can use nfs_mount version 5.0.2 now, but it won't work in later versions

@kambala-decapitator
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new input from xbmc/xbmc#26262

  • reproducible only with NFS v3
  • on macOS only share/folder browsing works, but files can't be read

@kambala-decapitator
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@sahlberg I've modified nfsclient-async example to point to my server, here's the output with library built from that debug branch:

>build\examples\nfsclient-async.exe
rpc_service(0114CD30, 0x00000010) entered
check getsockopt(SO_ERROR)
is connected, success
rpc_service(0114CD30, 0x00000300) entered
pollin
rpc_service is successful
rpc_service(0114CD30, 0x00000300) entered
pollin
read_from_socket returned error
nfs_service failed
nfsclient finished

@kambala-decapitator
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and this is nfsclient-sync:

>build\examples\nfsclient-sync.exe nfs://192.168.1.100/mnt/multimedia/video/movies/Up.WEB-DL.KP.1080p-SOFCJ.mkv
rpc_service(012F8D20, 0x00000010) entered
check getsockopt(SO_ERROR)
is connected, success
rpc_service(012F8D20, 0x00000300) entered
pollin
rpc_service is successful
rpc_service(012F8D20, 0x00000300) entered
pollin
read_from_socket returned error
rpc_service(012F8D20, 0x00000010) entered
check getsockopt(SO_ERROR)
is connected, success
rpc_service(012F8D20, 0x00000000) entered
rpc_service is successful
rpc_service(012F8D20, 0x00000000) entered
rpc_service is successful
rpc_service(012F8D20, 0x00000300) entered
pollin
rpc_service is successful
Failed to mount nfs share : Read from socket(276) failed, errno:10057 (Unknown error). Closing socket.

@JieBinCao
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Author

So, I can't compile on windows and visual studio online must be the most clunky and insane development environment ever created. May god have mercy on people forced to use it :-)

So, unless we get someone that can actually build and debug on windows we will have to do it the hard way :-( I will send updated versions of libnfs with debug statements, and someone of you need to build and test it.

Please test the debug-511 branch. It will print a bunch of lines of what is happening in rpc_service() which is where all the socket stuff happens. Please send me all the outputs of this as well as a wiresharp pcap file of when your test application runs and fails.

OK!This is the output content and pcap file：
20250116090334

debug-511-pcapng.zip

@kambala-decapitator
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oops, I forgot about wireshark dump. Here it is for nfsclient-sync run:
nfsclient-sync.pcapng.gz

@kambala-decapitator
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and here're results of running nfsclient-sync on macOS: nfsclient-sync-macos.pcapng.gz

> build/examples/nfsclient-sync 'nfs://192.168.1.100/mnt/multimedia/video/movies/Up.WEB-DL.KP.1080p-SOFCJ.mkv'
rpc_service(0x7feefef04750, 0x00000004) entered
check getsockopt(SO_ERROR)
is connected, success
rpc_service(0x7feefef04750, 0x00000001) entered
pollin
rpc_service is successful
rpc_service(0x7feefef04750, 0x00000001) entered
pollin
rpc_service is successful
rpc_service(0x7feefef04750, 0x00000004) entered
check getsockopt(SO_ERROR)
is connected, success
rpc_service(0x7feefef04750, 0x00000001) entered
pollin
rpc_service is successful
rpc_service(0x7feefef04750, 0x00000001) entered
pollin
rpc_service is successful
rpc_service(0x7feefef04750, 0x00000004) entered
check getsockopt(SO_ERROR)
is connected, success
rpc_service(0x7feefef04750, 0x00000001) entered
pollin
rpc_service is successful
Failed to mount nfs share :

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@sahlberg @kambala-decapitator @JieBinCao