Yonghong Song 9d0b3c1f14 tools/bpf: fix a netlink recv issue ... Commit f7010770fb ("tools/bpf: move bpf/lib netlink related functions into a new file") introduced a while loop for the netlink recv path. This while loop is needed since the buffer in recv syscall may not be enough to hold all the information and in such cases multiple recv calls are needed. There is a bug introduced by the above commit as the while loop may block on recv syscall if there is no more messages are expected. The netlink message header flag NLM_F_MULTI is used to indicate that more messages are expected and this patch fixed the bug by doing further recv syscall only if multipart message is expected. The patch added another fix regarding to message length of 0. When netlink recv returns message length of 0, there will be no more messages for returning data so the while loop can end. Fixes: f7010770fb ("tools/bpf: move bpf/lib netlink related functions into a new file") Reported-by: Björn Töpel <bjorn.topel@intel.com> Tested-by: Björn Töpel <bjorn.topel@intel.com> Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>		2018-09-11 14:26:30 -07:00
..
api	docs: Fix some broken references	2018-06-15 18:10:01 -03:00
bpf	tools/bpf: fix a netlink recv issue	2018-09-11 14:26:30 -07:00
lockdep	tools lib traceevent, tools lib lockdep: Rename 'enum pevent_errno' to 'enum tep_errno'	2018-08-13 15:23:07 -03:00
subcmd	perf tools: Add '\n' at the end of parse-options error messages	2018-04-18 15:35:51 -03:00
symbol	tools lib symbols: Introduce kallsyms__is_function()	2018-04-26 13:47:14 -03:00
traceevent	tools lib traceevent: Change to SPDX License format	2018-08-20 08:54:58 -03:00
bitmap.c	tools lib: Add bitmap_and function	2016-08-02 16:33:27 -03:00
find_bit.c	lib: optimize cpumask_next_and()	2018-02-06 18:32:44 -08:00
hweight.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
rbtree.c
str_error_r.c	objtool, perf: Fix GCC 8 -Wrestrict error	2018-03-19 13:51:54 -03:00
string.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
vsprintf.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00