Messages in this thread | | | Date | Wed, 09 Apr 2008 10:06:55 -0400 | From | Mark Lord <> | Subject | Regression: 2.6.25-rc8: FTP transfer errors |
| |
Mark Lord wrote: > Mark Lord wrote: >> Today I've been using 2.6.25-rc8 with an old embedded build system here >> for my empegs. One shell script calls out to /usr/bin/ftp to transfer >> an image to a remote system, and then read it back again and compare. >> >> The compare is failing, most (but not all) of the time, >> but only on 2.6.25-rc8, not on 2.6.24. Verified by switching >> back and forth between kernel versions for a short spell. >> >> The ftp client is netkit-ftp 0.17-16 on Kubuntu feisty. >> >> Switching to ncftpput/ncftpget avoids it on 2.6.25, >> but I wonder where the problem is. > > Now verified that the data loss occurs in the outbound direction. > The readback data is the same, regardless of which client s/w is used. > > So something in 2.6.25 is incompatible with the ftp client binary, or libs, > that are installed here. Or some other problem. ..
Recap, with more info:
The host system is running 2.6.25-rc8-git. It uses netkit-ftp to send a file to the remote system. Using strace shows that the entire file was read, and passed to write() for the outbound socket.
The remote system is running linux-2.2.xx, and is reporting -EPIPE from net/socket.c::sock_recvmsg() before all of the data has been received, and thus ends up with a short file, missing data at the end.
This exact sequence, with the exact same software, works fine when the host system is NOT running 2.6.25-*, (eg. 2.6.11 through 2.6.24 are fine).
Something may be broken here.
| |