Yonghong Song afbf21dce6 bpf: Support readonly/readwrite buffers in verifier ... Readonly and readwrite buffer register states are introduced. Totally four states, PTR_TO_RDONLY_BUF[_OR_NULL] and PTR_TO_RDWR_BUF[_OR_NULL] are supported. As suggested by their respective names, PTR_TO_RDONLY_BUF[_OR_NULL] are for readonly buffers and PTR_TO_RDWR_BUF[_OR_NULL] for read/write buffers. These new register states will be used by later bpf map element iterator. New register states share some similarity to PTR_TO_TP_BUFFER as it will calculate accessed buffer size during verification time. The accessed buffer size will be later compared to other metrics during later attach/link_create time. Similar to reg_state PTR_TO_BTF_ID_OR_NULL in bpf iterator programs, PTR_TO_RDONLY_BUF_OR_NULL or PTR_TO_RDWR_BUF_OR_NULL reg_types can be set at prog->aux->bpf_ctx_arg_aux, and bpf verifier will retrieve the values during btf_ctx_access(). Later bpf map element iterator implementation will show how such information will be assigned during target registeration time. The verifier is also enhanced such that PTR_TO_RDONLY_BUF can be passed to ARG_PTR_TO_MEM[_OR_NULL] helper argument, and PTR_TO_RDWR_BUF can be passed to ARG_PTR_TO_MEM[_OR_NULL] or ARG_PTR_TO_UNINIT_MEM. Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20200723184111.590274-1-yhs@fb.com		2020-07-25 20:16:32 -07:00
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arraymap.c	bpf: Remove redundant synchronize_rcu.	2020-07-01 08:07:13 -07:00
bpf_iter.c	bpf: Refactor to provide aux info to bpf_iter_init_seq_priv_t	2020-07-25 20:16:32 -07:00
bpf_lru_list.c
bpf_lru_list.h	bpf: Fix a typo "inacitve" -> "inactive"	2020-04-06 21:54:10 +02:00
bpf_lsm.c	bpf: Use tracing helpers for lsm programs	2020-06-01 15:08:04 -07:00
bpf_struct_ops.c	bpf: Set map_btf_{name, id} for all map types	2020-06-22 22:22:58 +02:00
bpf_struct_ops_types.h
btf.c	bpf: Support readonly/readwrite buffers in verifier	2020-07-25 20:16:32 -07:00
cgroup.c	bpf: Don't return EINVAL from {get,set}sockopt when optlen > PAGE_SIZE	2020-06-17 10:54:05 -07:00
core.c	bpf, netns: Handle multiple link attachments	2020-07-17 20:18:16 -07:00
cpumap.c	bpf: cpumap: Fix possible rcpu kthread hung	2020-07-21 09:15:28 -07:00
devmap.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next	2020-07-04 17:48:34 -07:00
disasm.c
disasm.h
dispatcher.c
hashtab.c	bpf: Remove redundant synchronize_rcu.	2020-07-01 08:07:13 -07:00
helpers.c	bpf: Implement BPF ring buffer and verifier support for it	2020-06-01 14:38:22 -07:00
inode.c	bpf: Create file bpf iterator	2020-05-09 17:05:26 -07:00
local_storage.c	bpf: Set map_btf_{name, id} for all map types	2020-06-22 22:22:58 +02:00
lpm_trie.c	bpf: Remove redundant synchronize_rcu.	2020-07-01 08:07:13 -07:00
Makefile	bpf: Add bpf_prog iterator	2020-07-25 20:16:32 -07:00
map_in_map.c	bpf: Implement CAP_BPF	2020-05-15 17:29:41 +02:00
map_in_map.h
map_iter.c	bpf: Refactor bpf_iter_reg to have separate seq_info member	2020-07-25 20:16:32 -07:00
net_namespace.c	bpf, netns: Fix build without CONFIG_INET	2020-07-21 09:12:34 -07:00
offload.c
percpu_freelist.c
percpu_freelist.h
prog_iter.c	bpf: Refactor bpf_iter_reg to have separate seq_info member	2020-07-25 20:16:32 -07:00
queue_stack_maps.c	bpf: Remove redundant synchronize_rcu.	2020-07-01 08:07:13 -07:00
reuseport_array.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2020-07-11 00:46:00 -07:00
ringbuf.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2020-07-11 00:46:00 -07:00
stackmap.c	bpf: Resolve BTF IDs in vmlinux image	2020-07-13 10:42:02 -07:00
syscall.c	bpf: Add bpf_prog iterator	2020-07-25 20:16:32 -07:00
sysfs_btf.c
task_iter.c	bpf: Refactor to provide aux info to bpf_iter_init_seq_priv_t	2020-07-25 20:16:32 -07:00
tnum.c
trampoline.c
verifier.c	bpf: Support readonly/readwrite buffers in verifier	2020-07-25 20:16:32 -07:00