diff options
| author |   Jakub Kicinski <jakub.kicinski@netronome.com> | 2018-05-03 18:37:09 -0700 |
|---|---|---|
| committer |   Daniel Borkmann <daniel@iogearbox.net> | 2018-05-04 23:41:03 +0200 |
| commit | 630a4d3874a06aa9f9481cbfc688981aad7a834c (patch) | |
| tree | c05ba72df03d1da0b2d96a75b4c7a19ba7887ec3 /drivers/net/ethernet/netronome/nfp/nfp_app.c | |
| parent | bpf: offload: allow offloaded programs to use perf event arrays (diff) | |
| download | linux-dev-630a4d3874a06aa9f9481cbfc688981aad7a834c.tar.xz linux-dev-630a4d3874a06aa9f9481cbfc688981aad7a834c.zip | |
nfp: bpf: record offload neutral maps in the driver
For asynchronous events originating from the device, like perf event
output, we need to be able to make sure that objects being referred
to by the FW message are valid on the host. FW events can get queued
and reordered. Even if we had a FW message "barrier" we should still
protect ourselves from bogus FW output.
Add a reverse-mapping hash table and record in it all raw map pointers
FW may refer to. Only record neutral maps, i.e. perf event arrays.
These are currently the only objects FW can refer to. Use RCU protection
on the read side, update side is under RTNL.
Since program vs map destruction order is slightly painful for offload
simply take an extra reference on all the recorded maps to make sure
they don't disappear.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'drivers/net/ethernet/netronome/nfp/nfp_app.c')
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/nfp_app.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_app.c b/drivers/net/ethernet/netronome/nfp/nfp_app.c index 6aedef0ad433..0e0253c7e17b 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_app.c +++ b/drivers/net/ethernet/netronome/nfp/nfp_app.c @@ -1,5 +1,5 @@ /* - * Copyright (C) 2017 Netronome Systems, Inc. + * Copyright (C) 2017-2018 Netronome Systems, Inc. * * This software is dual licensed under the GNU General License Version 2, * June 1991 as shown in the file COPYING in the top-level directory of this |