ifconfig stats comes from /proc/net/dev
It seems to be discussed here: http://lkml.org/lkml/2004/2/18/169
=====================================
In include/linux/seq_file.h we have
struct seq_file {
char *buf;
size_t size;
=====================================
size_t is defined here
./include/linux/types.h:typedef __kernel_size_t size_t;
=====================================
It is architecture dependant:
./include/asm/posix_types.h:typedef unsigned long __kernel_size_t;
.....
./include/asm-x86_64/posix_types.h:typedef unsigned long __kernel_size_t;
./include/asm-i386/posix_types.h:typedef unsigned int __kernel_size_t;
=====================================
$ fgrep -r "tx_bytes" .|fgrep ".h"
./drivers/net/atl1/atl1.h: u64 tx_bytes;
./drivers/net/e1000/e1000.h: unsigned int total_tx_bytes;
./include/linux/netdevice.h: unsigned long tx_bytes; /*
total bytes transmitted */
...
It sems possible to put various kind of type without messing up everything !
=====================================
I stop here. It needs to be investigated by someone competent !
--
e1000 driver: TX becomes zero when reaching 4 GB, so messes all stats
https://bugs.launchpad.net/bugs/273181
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