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<p class=MsoNormal><span style='color:#1F497D'>I have solved the issue (See
patch below). There was another bug in the nfs_do_evalpath() function related
to the union that was added for 4.10. It’s also in the patch.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>--- nfs_old.c 2010-07-01
11:18:06.000000000 -0400<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>+++ nfs.c 2011-03-31
19:47:08.000000000 -0400<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>@@ -1574,7 +1575,7 @@<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'> */<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'> assert(
node->args.name );<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'> <o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>- *(const
char**)arg = pathname + (node->args.name - p);<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>+ *(arg->c)
= pathname + (node->args.name - p);<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'> <o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'> #if 0<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'> /*
restore the directory node */<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>@@ -2616,6 +2617,9 @@<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'> if (count >
NFS_MAXDATA)<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'> count
= NFS_MAXDATA;<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'> <o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>+ if (count >
nfsStBlksize)<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>+ count
= nfsStBlksize;<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>+<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'> SERP_ARGS(node).readarg.offset =
iop->offset;<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'> SERP_ARGS(node).readarg.count
= count;<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'> SERP_ARGS(node).readarg.totalcount =
UINT32_C(0xdeadbeef);<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>@@ -2720,6 +2724,8 @@<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'> if (count >
NFS_MAXDATA)<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'> count
= NFS_MAXDATA;<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'> <o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>+ if (count >
nfsStBlksize)<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>+ count
= nfsStBlksize;<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'> <o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'> SERP_ARGS(node).writearg.beginoffset
= UINT32_C(0xdeadbeef);<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'> if (
LIBIO_FLAGS_APPEND & iop->flags ) {<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Kirspel, Kevin <br>
<b>Sent:</b> Thursday, March 31, 2011 5:59 PM<br>
<b>To:</b> rtems-users@rtems.org<br>
<b>Subject:</b> Shell copy_file() issue with NFS and small MAC receive buffer<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I am upgrading from 4.9 to 4.10 and I have come across an
issue between the RTEMS shell and NFS networking. <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>In 4.10, I cannot copy files from an NFS share to the RTEMS
file system (which works fine in 4.9). I traced it back to the
copy_file() function in the RTEMS shell (utils-cp.c). In the 4.9 version,
the buffer size was set to 4096. In 4.10, the buffer size is set to
8192. This causes a problem with my NFS because my Ethernet MAC/PHY only
has a 8192 receive buffer. I have to set the NFS nfsStBlksize to 4096 to
prevent buffer overflows. The copy_file() function is requesting 8192
bytes from the nfs_file_read() function which has only a4096 block size.
In this case, the NFS server does not respond to the request. I get the following
error:<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>RPCIO: server '192.168.21.204' not responding - still trying<o:p></o:p></p>
<p class=MsoNormal>NFS (proc 6) - RPC: Timed out<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>What is the appropriate way to fix this scenario?
Should I have a while loop in the nfs_file_read() function to process multiple
NFS requests until I get all the bytes needed?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Kevin Kirspel<o:p></o:p></p>
<p class=MsoNormal>Senior Electrical Engineer<o:p></o:p></p>
<p class=MsoNormal>Opti Medical<o:p></o:p></p>
<p class=MsoNormal>235 Hembree Park Drive<o:p></o:p></p>
<p class=MsoNormal>Roswell GA 30076<o:p></o:p></p>
<p class=MsoNormal>Tel: (770)-510-4444 ext. 81642<o:p></o:p></p>
<p class=MsoNormal>Direct: (770)-688-1642<o:p></o:p></p>
<p class=MsoNormal>Fax: (770)-510-4445<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
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