Andrii Nakryiko c70f34a8ac bpf: Fix bpf_iter's task iterator logic ... task_seq_get_next might stop prematurely if get_pid_task() fails to get task_struct. Failure to do so doesn't mean that there are no more tasks with higher pids. Procfs's iteration algorithm (see next_tgid in fs/proc/base.c) does a retry in such case. After this fix, instead of stopping prematurely after about 300 tasks on my server, bpf_iter program now returns >4000, which sounds much closer to reality. Fixes: eaaacd2391 ("bpf: Add task and task/file iterator targets") Signed-off-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20200514055137.1564581-1-andriin@fb.com		2020-05-14 18:37:32 -07:00
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arraymap.c	bpf: Add lookup and update batch ops to arraymap	2020-01-15 14:00:35 -08:00
bpf_iter.c	bpf: Enable bpf_iter targets registering ctx argument types	2020-05-13 12:30:50 -07:00
bpf_lru_list.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206	2019-05-30 11:29:53 -07:00
bpf_lru_list.h	bpf: Fix a typo "inacitve" -> "inactive"	2020-04-06 21:54:10 +02:00
bpf_lsm.c	bpf: lsm: Implement attach, detach and execution	2020-03-30 01:34:00 +02:00
bpf_struct_ops_types.h	bpf: tcp: Support tcp_congestion_ops in bpf	2020-01-09 08:46:18 -08:00
bpf_struct_ops.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2020-03-25 18:58:11 -07:00
btf.c	bpf: Enable bpf_iter targets registering ctx argument types	2020-05-13 12:30:50 -07:00
cgroup.c	bpf: Add support for BPF_OBJ_GET_INFO_BY_FD for bpf_link	2020-04-28 17:27:08 -07:00
core.c	bpf: add bpf_ktime_get_boot_ns()	2020-04-26 09:43:05 -07:00
cpumap.c	cpumap: Avoid warning when CONFIG_DEBUG_PER_CPU_MAPS is enabled	2020-04-20 18:38:04 -07:00
devmap.c	xdp: export the DEV_MAP_BULK_SIZE macro	2020-04-22 20:11:29 -07:00
disasm.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 295	2019-06-05 17:36:38 +02:00
disasm.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 295	2019-06-05 17:36:38 +02:00
dispatcher.c	bpf: Remove bpf_image tree	2020-03-13 12:49:52 -07:00
hashtab.c	bpf: Replace zero-length array with flexible-array member	2020-02-28 01:21:02 +01:00
helpers.c	bpf: add bpf_ktime_get_boot_ns()	2020-04-26 09:43:05 -07:00
inode.c	bpf: Create file bpf iterator	2020-05-09 17:05:26 -07:00
local_storage.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2019-12-22 09:54:33 -08:00
lpm_trie.c	bpf: Replace zero-length array with flexible-array member	2020-02-28 01:21:02 +01:00
Makefile	bpf: Add task and task/file iterator targets	2020-05-09 17:05:26 -07:00
map_in_map.c	bpf: Introduce BPF_MAP_TYPE_STRUCT_OPS	2020-01-09 08:46:18 -08:00
map_in_map.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206	2019-05-30 11:29:53 -07:00
map_iter.c	bpf: Enable bpf_iter targets registering ctx argument types	2020-05-13 12:30:50 -07:00
offload.c	bpf, offload: Replace bitwise AND by logical AND in bpf_prog_offload_info_fill	2020-02-17 16:53:49 +01:00
percpu_freelist.c	bpf: Dont iterate over possible CPUs with interrupts disabled	2020-02-24 16:18:20 -08:00
percpu_freelist.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206	2019-05-30 11:29:53 -07:00
queue_stack_maps.c	bpf, libbpf: Replace zero-length array with flexible-array	2020-05-11 16:56:47 +02:00
reuseport_array.c	net: Generate reuseport group ID on group creation	2020-02-21 22:29:45 +01:00
stackmap.c	bpf/stackmap: Dont trylock mmap_sem with PREEMPT_RT and interrupts disabled	2020-02-24 16:20:10 -08:00
syscall.c	bpf: Add bpf_map iterator	2020-05-09 17:05:26 -07:00
sysfs_btf.c	bpf: Support llvm-objcopy for vmlinux BTF	2020-03-19 12:32:38 +01:00
task_iter.c	bpf: Fix bpf_iter's task iterator logic	2020-05-14 18:37:32 -07:00
tnum.c	bpf: Verifier, do explicit ALU32 bounds tracking	2020-03-30 14:59:53 -07:00
trampoline.c	bpf: lsm: Implement attach, detach and execution	2020-03-30 01:34:00 +02:00
verifier.c	bpf: Enable bpf_iter targets registering ctx argument types	2020-05-13 12:30:50 -07:00
xskmap.c	xsk: Make xskmap flush_list common for all map instances	2019-12-19 21:09:43 -08:00