linux/kernel/bpf
Alexei Starovoitov 638e4b825d bpf: Allows per-cpu maps and map-in-map in sleepable programs
Since sleepable programs are now executing under migrate_disable
the per-cpu maps are safe to use.
The map-in-map were ok to use in sleepable from the time sleepable
progs were introduced.

Note that non-preallocated maps are still not safe, since there is
no rcu_read_lock yet in sleepable programs and dynamically allocated
map elements are relying on rcu protection. The sleepable programs
have rcu_read_lock_trace instead. That limitation will be addresses
in the future.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: KP Singh <kpsingh@kernel.org>
Link: https://lore.kernel.org/bpf/20210210033634.62081-9-alexei.starovoitov@gmail.com
2021-02-11 16:19:26 +01:00
..
preload bpf: Remove unnecessary <argp.h> include from preload/iterators 2021-01-08 13:39:24 -08:00
arraymap.c bpf: Eliminate rlimit-based memory accounting for arraymap maps 2020-12-02 18:32:46 -08:00
bpf_inode_storage.c bpf: Fix typo in bpf_inode_storage.c 2021-01-12 16:07:57 +01:00
bpf_iter.c
bpf_local_storage.c bpf: Eliminate rlimit-based memory accounting for bpf local storage maps 2020-12-02 18:32:47 -08:00
bpf_lru_list.c bpf_lru_list: Read double-checked variable once without lock 2021-02-10 15:54:26 -08:00
bpf_lru_list.h
bpf_lsm.c bpf: Add a BPF helper for getting the IMA hash of an inode 2020-11-26 00:04:04 +01:00
bpf_struct_ops.c bpf: Eliminate rlimit-based memory accounting for bpf_struct_ops maps 2020-12-02 18:32:46 -08:00
bpf_struct_ops_types.h
bpf_task_storage.c bpf: Local storage helpers should check nullness of owner ptr passed 2021-01-12 16:07:56 +01:00
btf.c bpf: Permit size-0 datasec 2021-01-20 14:14:09 -08:00
cgroup.c bpf: Allow rewriting to ports under ip_unprivileged_port_start 2021-01-27 18:18:15 -08:00
core.c bpf: Add per-program recursion prevention mechanism 2021-02-11 16:19:13 +01:00
cpumap.c net, xdp: Introduce __xdp_build_skb_from_frame utility routine 2021-01-20 14:10:35 -08:00
devmap.c bpf: Eliminate rlimit-based memory accounting for devmap maps 2020-12-02 18:32:46 -08:00
disasm.c bpf: Change 'BPF_ADD' to 'BPF_AND' in print_bpf_insn() 2021-01-27 22:23:46 +01:00
disasm.h
dispatcher.c
hashtab.c bpf: Allows per-cpu maps and map-in-map in sleepable programs 2021-02-11 16:19:26 +01:00
helpers.c bpf: Simplify cases in bpf_base_func_proto 2021-01-29 02:20:28 +01:00
inode.c
local_storage.c bpf: Eliminate rlimit-based memory accounting for cgroup storage maps 2020-12-02 18:32:46 -08:00
lpm_trie.c bpf: Eliminate rlimit-based memory accounting for lpm_trie maps 2020-12-02 18:32:46 -08:00
Makefile Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next 2020-11-14 09:13:41 -08:00
map_in_map.c
map_in_map.h
map_iter.c
net_namespace.c
offload.c
percpu_freelist.c
percpu_freelist.h
prog_iter.c
queue_stack_maps.c bpf: Eliminate rlimit-based memory accounting for queue_stack_maps maps 2020-12-02 18:32:46 -08:00
reuseport_array.c bpf: Eliminate rlimit-based memory accounting for reuseport_array maps 2020-12-02 18:32:47 -08:00
ringbuf.c bpf: Eliminate rlimit-based memory accounting for bpf ringbuffer 2020-12-02 18:32:47 -08:00
stackmap.c bpf: Add size arg to build_id_parse function 2021-01-14 19:29:58 -08:00
syscall.c bpf: Count the number of times recursion was prevented 2021-02-11 16:19:20 +01:00
sysfs_btf.c bpf: Load and verify kernel module BTFs 2020-11-10 15:25:53 -08:00
task_iter.c bpf: Fix a task_iter bug caused by a merge conflict resolution 2021-01-03 01:41:32 +01:00
tnum.c
trampoline.c bpf: Count the number of times recursion was prevented 2021-02-11 16:19:20 +01:00
verifier.c bpf: Allows per-cpu maps and map-in-map in sleepable programs 2021-02-11 16:19:26 +01:00