AuxXxilium/linux_dsm_epyc7002
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1ae80cf319
linux_dsm_epyc7002/kernel/bpf
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Daniel Colascione 1ae80cf319 bpf: wait for running BPF programs when updating map-in-map 
The map-in-map frequently serves as a mechanism for atomic
snapshotting of state that a BPF program might record.  The current
implementation is dangerous to use in this way, however, since
userspace has no way of knowing when all programs that might have
retrieved the "old" value of the map may have completed.

This change ensures that map update operations on map-in-map map types
always wait for all references to the old map to drop before returning
to userspace.

Signed-off-by: Daniel Colascione <dancol@google.com>
Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-10-12 19:32:19 -07:00
..
arraymap.c bpf: return EOPNOTSUPP when map lookup isn't supported 2018-10-09 21:52:20 -07:00
bpf_lru_list.c bpf: lru: Lower the PERCPU_NR_SCANS from 16 to 4 2017-04-17 13:55:52 -04:00
bpf_lru_list.h bpf: Only set node->ref = 1 if it has not been set 2017-09-01 09:57:39 -07:00
btf.c bpf: btf: Fix a missing check bug 2018-10-09 21:42:51 -07:00
cgroup.c bpf: extend cgroup bpf core to allow multiple cgroup storage types 2018-10-01 16:18:32 +02:00
core.c bpf: fix a rcu usage warning in bpf_prog_array_copy_core() 2018-08-16 21:55:32 +02:00
cpumap.c bpf: fix redirect to map under tail calls 2018-08-17 15:56:23 -07:00
devmap.c bpf: fix redirect to map under tail calls 2018-08-17 15:56:23 -07:00
disasm.c bpf: Remove struct bpf_verifier_env argument from print_bpf_insn 2018-03-23 17:38:57 +01:00
disasm.h bpf: Remove struct bpf_verifier_env argument from print_bpf_insn 2018-03-23 17:38:57 +01:00
hashtab.c bpf: add bpffs pretty print for percpu arraymap/hash/lru_hash 2018-08-30 14:03:53 +02:00
helpers.c bpf: introduce per-cpu cgroup local storage 2018-10-01 16:18:32 +02:00
inode.c bpf: decouple btf from seq bpf fs dump and enable more maps 2018-08-13 00:52:45 +02:00
local_storage.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next 2018-10-08 23:42:44 -07:00
lpm_trie.c bpf: decouple btf from seq bpf fs dump and enable more maps 2018-08-13 00:52:45 +02:00
Makefile bpf: Introduce BPF_MAP_TYPE_REUSEPORT_SOCKARRAY 2018-08-11 01:58:46 +02:00
map_in_map.c bpf: don't allow create maps of per-cpu cgroup local storages 2018-10-01 16:18:33 +02:00
map_in_map.h bpf: Add syscall lookup support for fd array and htab 2017-06-29 13:13:25 -04:00
offload.c bpf: add verifier callback to get stack usage info for offloaded progs 2018-10-08 10:24:12 +02:00
percpu_freelist.c bpf: fix lockdep splat 2017-11-15 19:46:32 +09:00
percpu_freelist.h bpf: introduce percpu_freelist 2016-03-08 15:28:31 -05:00
reuseport_array.c bpf: Introduce BPF_MAP_TYPE_REUSEPORT_SOCKARRAY 2018-08-11 01:58:46 +02:00
sockmap.c bpf: return EOPNOTSUPP when map lookup isn't supported 2018-10-09 21:52:20 -07:00
stackmap.c bpf: return EOPNOTSUPP when map lookup isn't supported 2018-10-09 21:52:20 -07:00
syscall.c bpf: wait for running BPF programs when updating map-in-map 2018-10-12 19:32:19 -07:00
tnum.c bpf/verifier: improve register value range tracking with ARSH 2018-04-29 08:45:53 -07:00
verifier.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next 2018-10-08 23:42:44 -07:00
xskmap.c bpf: return EOPNOTSUPP when map lookup isn't supported 2018-10-09 21:52:20 -07:00