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authorDavid Howells <dhowells@redhat.com>2023-06-24 01:55:12 +0300
committerJakub Kicinski <kuba@kernel.org>2023-06-25 01:50:13 +0300
commitdc97391e661009eab46783030d2404c9b6e6f2e7 (patch)
treedbfd7c2bff27341b72d5218dde0849d913382bdb /Documentation/bpf
parente52828cc0109f511bba1dfb41292833c2fd3b6e6 (diff)
downloadlinux-dc97391e661009eab46783030d2404c9b6e6f2e7.tar.xz
sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES)
Remove ->sendpage() and ->sendpage_locked(). sendmsg() with MSG_SPLICE_PAGES should be used instead. This allows multiple pages and multipage folios to be passed through. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Marc Kleine-Budde <mkl@pengutronix.de> # for net/can cc: Jens Axboe <axboe@kernel.dk> cc: Matthew Wilcox <willy@infradead.org> cc: linux-afs@lists.infradead.org cc: mptcp@lists.linux.dev cc: rds-devel@oss.oracle.com cc: tipc-discussion@lists.sourceforge.net cc: virtualization@lists.linux-foundation.org Link: https://lore.kernel.org/r/20230623225513.2732256-16-dhowells@redhat.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'Documentation/bpf')
-rw-r--r--Documentation/bpf/map_sockmap.rst10
1 files changed, 5 insertions, 5 deletions
diff --git a/Documentation/bpf/map_sockmap.rst b/Documentation/bpf/map_sockmap.rst
index cc92047c6630..2d630686a00b 100644
--- a/Documentation/bpf/map_sockmap.rst
+++ b/Documentation/bpf/map_sockmap.rst
@@ -240,11 +240,11 @@ offsets into ``msg``, respectively.
If a program of type ``BPF_PROG_TYPE_SK_MSG`` is run on a ``msg`` it can only
parse data that the (``data``, ``data_end``) pointers have already consumed.
For ``sendmsg()`` hooks this is likely the first scatterlist element. But for
-calls relying on the ``sendpage`` handler (e.g., ``sendfile()``) this will be
-the range (**0**, **0**) because the data is shared with user space and by
-default the objective is to avoid allowing user space to modify data while (or
-after) BPF verdict is being decided. This helper can be used to pull in data
-and to set the start and end pointers to given values. Data will be copied if
+calls relying on MSG_SPLICE_PAGES (e.g., ``sendfile()``) this will be the
+range (**0**, **0**) because the data is shared with user space and by default
+the objective is to avoid allowing user space to modify data while (or after)
+BPF verdict is being decided. This helper can be used to pull in data and to
+set the start and end pointers to given values. Data will be copied if
necessary (i.e., if data was not linear and if start and end pointers do not
point to the same chunk).