diff options
| author |   Magnus Karlsson <magnus.karlsson@intel.com> | 2018-05-02 13:01:24 +0200 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2018-05-03 15:55:23 -0700 |
| commit | 423f38329d267969130fb6f2c685f73d72687558 (patch) | |
| tree | ab7c0df0819c420846ac47c18ddc0fd614eaf035 /net/xdp/xdp_umem.c | |
| parent | xsk: add user memory registration support sockopt (diff) | |
| download | linux-dev-423f38329d267969130fb6f2c685f73d72687558.tar.xz linux-dev-423f38329d267969130fb6f2c685f73d72687558.zip | |
xsk: add umem fill queue support and mmap
Here, we add another setsockopt for registered user memory (umem)
called XDP_UMEM_FILL_QUEUE. Using this socket option, the process can
ask the kernel to allocate a queue (ring buffer) and also mmap it
(XDP_UMEM_PGOFF_FILL_QUEUE) into the process.
The queue is used to explicitly pass ownership of umem frames from the
user process to the kernel. These frames will in a later patch be
filled in with Rx packet data by the kernel.
v2: Fixed potential crash in xsk_mmap.
Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'net/xdp/xdp_umem.c')
| -rw-r--r-- | net/xdp/xdp_umem.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/net/xdp/xdp_umem.c b/net/xdp/xdp_umem.c index ec8b3552be44..e1f627d0cc1c 100644 --- a/net/xdp/xdp_umem.c +++ b/net/xdp/xdp_umem.c @@ -65,6 +65,11 @@ static void xdp_umem_release(struct xdp_umem *umem) struct task_struct *task; struct mm_struct *mm; + if (umem->fq) { + xskq_destroy(umem->fq); + umem->fq = NULL; + } + if (umem->pgs) { xdp_umem_unpin_pages(umem); |