OpenCloudOS-Kernel

Go to file

Yonghong Song 8482941f09 bpf: Add bpf_send_signal_thread() helper Commit `8b401f9ed2` ("bpf: implement bpf_send_signal() helper") added helper bpf_send_signal() which permits bpf program to send a signal to the current process. The signal may be delivered to any threads in the process. We found a use case where sending the signal to the current thread is more preferable. - A bpf program will collect the stack trace and then send signal to the user application. - The user application will add some thread specific information to the just collected stack trace for later analysis. If bpf_send_signal() is used, user application will need to check whether the thread receiving the signal matches the thread collecting the stack by checking thread id. If not, it will need to send signal to another thread through pthread_kill(). This patch proposed a new helper bpf_send_signal_thread(), which sends the signal to the thread corresponding to the current kernel task. This way, user space is guaranteed that bpf_program execution context and user space signal handling context are the same thread. Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20200115035002.602336-1-yhs@fb.com		2020-01-15 11:44:51 -08:00
Documentation	Documentation: networking: Add stmmac to device drivers list	2020-01-07 13:38:56 -08:00
LICENSES	…
arch	bpf: Introduce BPF_MAP_TYPE_STRUCT_OPS	2020-01-09 08:46:18 -08:00
block	compat_ioctl: block: handle Persistent Reservations	2019-12-21 07:26:56 -07:00
certs	…
crypto	tpmdd fixes for Linux v5.5-rc3	2019-12-18 17:17:36 -08:00
drivers	ptp: clockmatrix: Rework clockmatrix version information.	2020-01-07 13:51:23 -08:00
fs	File locking fix for v5.5	2019-12-29 09:50:57 -08:00
include	bpf: Add bpf_send_signal_thread() helper	2020-01-15 11:44:51 -08:00
init	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next	2019-12-27 14:20:10 -08:00
ipc	…
kernel	bpf: Add bpf_send_signal_thread() helper	2020-01-15 11:44:51 -08:00
lib	Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2019-12-22 17:00:04 -08:00
mm	mm: vmscan: protect shrinker idr replace with CONFIG_MEMCG	2019-12-17 20:59:59 -08:00
net	xsk: Support allocations of large umems	2020-01-15 11:41:52 -08:00
samples	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next	2019-12-27 14:20:10 -08:00
scripts	libbpf: Clean up bpf_helper_defs.h generation output	2020-01-13 17:48:13 -08:00
security	Two bugfix patches for 5.5.	2019-12-31 10:51:27 -08:00
sound	sound fixes for 5.5-rc3	2019-12-18 08:54:15 -08:00
tools	bpf: Add bpf_send_signal_thread() helper	2020-01-15 11:44:51 -08:00
usr	…
virt	PPC KVM fix for 5.5	2019-12-22 13:18:15 +01:00
.clang-format	…
.cocciconfig	…
.get_maintainer.ignore	…
.gitattributes	…
.gitignore	…
.mailmap	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2019-12-22 09:54:33 -08:00
COPYING	…
CREDITS	…
Kbuild	…
Kconfig	…
MAINTAINERS	MAINTAINERS: Add stmmac Ethernet driver documentation entry	2020-01-07 13:38:56 -08:00
Makefile	Linux 5.5-rc4	2019-12-29 15:29:16 -08:00
README	…

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.