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Tirthendu Sarkar d609f3d228 xsk: add multi-buffer support for sockets sharing umem
Userspace applications indicate their multi-buffer capability to xsk
using XSK_USE_SG socket bind flag. For sockets using shared umem the
bind flag may contain XSK_USE_SG only for the first socket. For any
subsequent socket the only option supported is XDP_SHARED_UMEM.

Add option XDP_UMEM_SG_FLAG in umem config flags to store the
multi-buffer handling capability when indicated by XSK_USE_SG option in
bing flag by the first socket. Use this to derive multi-buffer capability
for subsequent sockets in xsk core.

Signed-off-by: Tirthendu Sarkar <tirthendu.sarkar@intel.com>
Fixes: 81470b5c3c ("xsk: introduce XSK_USE_SG bind flag for xsk socket")
Acked-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Link: https://lore.kernel.org/r/20230907035032.2627879-1-tirthendu.sarkar@intel.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2023-09-15 11:00:22 -07:00
arch bpf, x64: Fix tailcall infinite loop 2023-09-12 13:06:12 -07:00
block for-6.6/block-2023-08-28 2023-08-29 20:21:42 -07:00
certs certs: Reference revocation list for all keyrings 2023-08-17 20:12:41 +00:00
crypto This update includes the following changes: 2023-08-29 11:23:29 -07:00
Documentation docs/bpf: update out-of-date doc in BPF flow dissector 2023-09-13 14:22:57 -07:00
drivers Including fixes from netfilter and bpf. 2023-09-07 18:33:07 -07:00
fs ntfs3: drop inode references in ntfs_put_super() 2023-09-07 10:23:37 -07:00
include xsk: add multi-buffer support for sockets sharing umem 2023-09-15 11:00:22 -07:00
init workqueue: Changes for v6.6 2023-09-01 16:06:32 -07:00
io_uring for-6.6/io_uring-2023-08-28 2023-08-29 20:11:33 -07:00
ipc Add x86 shadow stack support 2023-08-31 12:20:12 -07:00
kernel bpf: Charge modmem for struct_ops trampoline 2023-09-14 15:30:45 -07:00
lib printk changes for 6.6 2023-09-04 13:20:19 -07:00
LICENSES
mm Seven hotfixes. Four are cc:stable and the remainder pertain to issues 2023-09-05 12:22:39 -07:00
net xsk: add multi-buffer support for sockets sharing umem 2023-09-15 11:00:22 -07:00
rust Documentation work keeps chugging along; stuff for 6.6 includes: 2023-08-30 20:05:42 -07:00
samples selftests/bpf: trace_helpers.c: Optimize kallsyms cache 2023-09-08 16:22:41 -07:00
scripts Including fixes from netfilter and bpf. 2023-09-07 18:33:07 -07:00
security Three cleanup patches, no behavior changes. 2023-09-04 10:38:35 -07:00
sound This pull request contains the following changes for UML: 2023-09-04 11:32:21 -07:00
tools selftests/bpf: Skip module_fentry_shadow test when bpf_testmod is not available 2023-09-14 11:16:13 -07:00
usr
virt ARM: 2023-09-07 13:52:20 -07:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore kbuild: rpm-pkg: rename binkernel.spec to kernel.spec 2023-07-25 00:59:33 +09:00
.mailmap for-linus-2023083101 2023-09-01 12:31:44 -07:00
.rustfmt.toml
COPYING
CREDITS USB: Remove Wireless USB and UWB documentation 2023-08-09 14:17:32 +02:00
Kbuild
Kconfig
MAINTAINERS RTC for 6.6 2023-09-07 16:07:35 -07:00
Makefile Kbuild updates for v6.6 2023-09-05 11:01:47 -07:00
README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.