The function in tcp_probe is printf like, use GCC to check the args.
Sighed-off-by: NStephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Just a fix to correct the number of printl arguments. Now, srtt is
logging correctly.
Signed-off-by: NSangtae Ha <sangtae.ha@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Change tcp_probe to use ktime (needed to add one export).
Add option to only get events when cwnd changes - from Doug Leith
Signed-off-by: NStephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Many struct file_operations in the kernel can be "const".  Marking them const
moves these to the .rodata section, which avoids false sharing with potential
dirty data.  In addition it'll catch accidental writes at compile time to
these shared resources.
Signed-off-by: NArjan van de Ven <arjan@linux.intel.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Change my email address to reflect OSDL merger.
Signed-off-by: NStephen Hemminger <shemminger@osdl.org>
[ The irony. Somebody still has his sign-off message hardcoded
  in a script or his brainstem ;^]
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

The return value of kfifo_alloc() should be checked by IS_ERR().
Signed-off-by: NAkinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

In an effort to make kprobe modules more portable, here is a patch that:

o Introduces the "symbol_name" field to struct kprobe.
  The symbol->address resolution now happens in the kernel in an
  architecture agnostic manner. 64-bit powerpc users no longer have
  to specify the ".symbols"
o Introduces the "offset" field to struct kprobe to allow a user to
  specify an offset into a symbol.
o The legacy mechanism of specifying the kprobe.addr is still supported.
  However, if both the kprobe.addr and kprobe.symbol_name are specified,
  probe registration fails with an -EINVAL.
o The symbol resolution code uses kallsyms_lookup_name(). So
  CONFIG_KPROBES now depends on CONFIG_KALLSYMS
o Apparantly kprobe modules were the only legitimate out-of-tree user of
  the kallsyms_lookup_name() EXPORT. Now that the symbol resolution
  happens in-kernel, remove the EXPORT as suggested by Christoph Hellwig
o Modify tcp_probe.c that uses the kprobe interface so as to make it
  work on multiple platforms (in its earlier form, the code wouldn't
  work, say, on powerpc)
Signed-off-by: NAnanth N Mavinakayanahalli <ananth@in.ibm.com>
Signed-off-by: NPrasanna S Panchamukhi <prasanna@in.ibm.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Somehow I clobbered James's original fix and only my
subsequent compiler warning change went in for that
changeset.

Get the real fix in there.

Noticed by Jesper Juhl.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Based upon a patch by Jesper Juhl.
Signed-off-by: NJames Morris <jmorris@namei.org>
Acked-by: NStephen Hemminger <shemminger@osdl.org>
Acked-by: NJesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The suseconds_t et al. are not necessarily any particular type on
every platform, so cast to unsigned long so that we can use one printf
format string and avoid warnings across the board
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This adds a new module for tracking TCP state variables non-intrusively
using kprobes.  It has a simple /proc interface that outputs one line
for each packet received. A sample usage is to collect congestion
window and ssthresh over time graphs.
Signed-off-by: NStephen Hemminger <shemminger@osdl.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>