linux-toradex.git/net/rds/message.c, branch v3.3.5

net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules

2011-10-31T23:30:30+00:00

These files are non modular, but need to export symbols using
the macros now living in export.h -- call out the include so
that things won't break when we remove the implicit presence
of module.h from everywhere.

Signed-off-by: Paul Gortmaker

rds: Fix rds message leak in rds_message_map_pages

2010-11-08T20:17:09+00:00

The sgs allocation error path leaks the allocated message.

Signed-off-by: Pavel Emelyanov 
Acked-by: Andy Grover 
Signed-off-by: David S. Miller

RDS: Let rds_message_alloc_sgs() return NULL

2010-10-30T23:34:18+00:00

Even with the previous fix, we still are reading the iovecs once
to determine SGs needed, and then again later on. Preallocating
space for sg lists as part of rds_message seemed like a good idea
but it might be better to not do this. While working to redo that
code, this patch attempts to protect against userspace rewriting
the rds_iovec array between the first and second accesses.

The consequences of this would be either a too-small or too-large
sg list array. Too large is not an issue. This patch changes all
callers of message_alloc_sgs to handle running out of preallocated
sgs, and fail gracefully.

Signed-off-by: Andy Grover 
Signed-off-by: David S. Miller

rds: make local functions/variables static

2010-10-21T11:26:39+00:00

The RDS protocol has lots of functions that should be
declared static. rds_message_get/add_version_extension is
removed since it defined but never used.

Signed-off-by: Stephen Hemminger 
Signed-off-by: David S. Miller

rds: don't let RDS shutdown a connection while senders are present

2010-09-09T01:15:09+00:00

This is the first in a long line of patches that tries to fix races
between RDS connection shutdown and RDS traffic.

Here we are maintaining a count of active senders to make sure
the connection doesn't go away while they are using it.

Signed-off-by: Chris Mason

rds: per-rm flush_wait waitq

2010-09-09T01:12:27+00:00

This removes a global waitqueue used to wait for rds messages
and replaces it with a waitqueue inside the rds_message struct.

The global waitqueue turns into a global lock and significantly
bottlenecks operations on large machines.

Signed-off-by: Chris Mason

RDS: Do wait_event_interruptible instead of wait_event

2010-09-09T01:12:22+00:00

Can't see a reason not to allow signals to interrupt the wait.

Signed-off-by: Andy Grover

RDS: rds_message_unmapped() doesn't need to check if queue active

2010-09-09T01:12:19+00:00

If the queue has nobody on it, then wake_up does nothing.

Signed-off-by: Andy Grover

RDS: Use NOWAIT in message_map_pages()

2010-09-09T01:12:17+00:00

Can no longer block, so use NOWAIT.

Signed-off-by: Andy Grover

RDS: Add a warning if trying to allocate 0 sgs

2010-09-09T01:12:03+00:00

rds_message_alloc_sgs() only works when nents is nonzero.

Signed-off-by: Andy Grover