forked from Minki/linux
Merge branch 'autogen-bpf-helpers'
Andrii Nakryiko says: ==================== This patch set adds ability to auto-generate list of BPF helper definitions. It relies on existing scripts/bpf_helpers_doc.py and include/uapi/linux/bpf.h having a well-defined set of comments. bpf_helper_defs.h contains all BPF helper signatures which stay in sync with latest bpf.h UAPI. This auto-generated header is included from bpf_helpers.h, while all previously hand-written BPF helper definitions are simultaneously removed in patch #3. The end result is less manually maintained and redundant boilerplate code, while also more consistent and well-documented set of BPF helpers. Generated helper definitions are completely independent from a specific bpf.h on a target system, because it doesn't use BPF_FUNC_xxx enums. v3->v4: - instead of libbpf's Makefile, integrate with selftest/bpf's Makefile (Alexei); v2->v3: - delete bpf_helper_defs.h properly (Alexei); v1->v2: - add bpf_helper_defs.h to .gitignore and `make clean` (Alexei). ==================== Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Alexei Starovoitov
commit
05949f6305
@ -794,7 +794,7 @@ union bpf_attr {
|
||||
* A 64-bit integer containing the current GID and UID, and
|
||||
* created as such: *current_gid* **<< 32 \|** *current_uid*.
|
||||
*
|
||||
* int bpf_get_current_comm(char *buf, u32 size_of_buf)
|
||||
* int bpf_get_current_comm(void *buf, u32 size_of_buf)
|
||||
* Description
|
||||
* Copy the **comm** attribute of the current task into *buf* of
|
||||
* *size_of_buf*. The **comm** attribute contains the name of
|
||||
@ -1023,7 +1023,7 @@ union bpf_attr {
|
||||
* The realm of the route for the packet associated to *skb*, or 0
|
||||
* if none was found.
|
||||
*
|
||||
* int bpf_perf_event_output(struct pt_regs *ctx, struct bpf_map *map, u64 flags, void *data, u64 size)
|
||||
* int bpf_perf_event_output(void *ctx, struct bpf_map *map, u64 flags, void *data, u64 size)
|
||||
* Description
|
||||
* Write raw *data* blob into a special BPF perf event held by
|
||||
* *map* of type **BPF_MAP_TYPE_PERF_EVENT_ARRAY**. This perf
|
||||
@ -1068,7 +1068,7 @@ union bpf_attr {
|
||||
* Return
|
||||
* 0 on success, or a negative error in case of failure.
|
||||
*
|
||||
* int bpf_skb_load_bytes(const struct sk_buff *skb, u32 offset, void *to, u32 len)
|
||||
* int bpf_skb_load_bytes(const void *skb, u32 offset, void *to, u32 len)
|
||||
* Description
|
||||
* This helper was provided as an easy way to load data from a
|
||||
* packet. It can be used to load *len* bytes from *offset* from
|
||||
@ -1085,7 +1085,7 @@ union bpf_attr {
|
||||
* Return
|
||||
* 0 on success, or a negative error in case of failure.
|
||||
*
|
||||
* int bpf_get_stackid(struct pt_regs *ctx, struct bpf_map *map, u64 flags)
|
||||
* int bpf_get_stackid(void *ctx, struct bpf_map *map, u64 flags)
|
||||
* Description
|
||||
* Walk a user or a kernel stack and return its id. To achieve
|
||||
* this, the helper needs *ctx*, which is a pointer to the context
|
||||
@ -1154,7 +1154,7 @@ union bpf_attr {
|
||||
* The checksum result, or a negative error code in case of
|
||||
* failure.
|
||||
*
|
||||
* int bpf_skb_get_tunnel_opt(struct sk_buff *skb, u8 *opt, u32 size)
|
||||
* int bpf_skb_get_tunnel_opt(struct sk_buff *skb, void *opt, u32 size)
|
||||
* Description
|
||||
* Retrieve tunnel options metadata for the packet associated to
|
||||
* *skb*, and store the raw tunnel option data to the buffer *opt*
|
||||
@ -1172,7 +1172,7 @@ union bpf_attr {
|
||||
* Return
|
||||
* The size of the option data retrieved.
|
||||
*
|
||||
* int bpf_skb_set_tunnel_opt(struct sk_buff *skb, u8 *opt, u32 size)
|
||||
* int bpf_skb_set_tunnel_opt(struct sk_buff *skb, void *opt, u32 size)
|
||||
* Description
|
||||
* Set tunnel options metadata for the packet associated to *skb*
|
||||
* to the option data contained in the raw buffer *opt* of *size*.
|
||||
@ -1511,7 +1511,7 @@ union bpf_attr {
|
||||
* Return
|
||||
* 0
|
||||
*
|
||||
* int bpf_setsockopt(struct bpf_sock_ops *bpf_socket, int level, int optname, char *optval, int optlen)
|
||||
* int bpf_setsockopt(struct bpf_sock_ops *bpf_socket, int level, int optname, void *optval, int optlen)
|
||||
* Description
|
||||
* Emulate a call to **setsockopt()** on the socket associated to
|
||||
* *bpf_socket*, which must be a full socket. The *level* at
|
||||
@ -1595,7 +1595,7 @@ union bpf_attr {
|
||||
* Return
|
||||
* **XDP_REDIRECT** on success, or **XDP_ABORTED** on error.
|
||||
*
|
||||
* int bpf_sk_redirect_map(struct bpf_map *map, u32 key, u64 flags)
|
||||
* int bpf_sk_redirect_map(struct sk_buff *skb, struct bpf_map *map, u32 key, u64 flags)
|
||||
* Description
|
||||
* Redirect the packet to the socket referenced by *map* (of type
|
||||
* **BPF_MAP_TYPE_SOCKMAP**) at index *key*. Both ingress and
|
||||
@ -1715,7 +1715,7 @@ union bpf_attr {
|
||||
* Return
|
||||
* 0 on success, or a negative error in case of failure.
|
||||
*
|
||||
* int bpf_getsockopt(struct bpf_sock_ops *bpf_socket, int level, int optname, char *optval, int optlen)
|
||||
* int bpf_getsockopt(struct bpf_sock_ops *bpf_socket, int level, int optname, void *optval, int optlen)
|
||||
* Description
|
||||
* Emulate a call to **getsockopt()** on the socket associated to
|
||||
* *bpf_socket*, which must be a full socket. The *level* at
|
||||
@ -1947,7 +1947,7 @@ union bpf_attr {
|
||||
* Return
|
||||
* 0 on success, or a negative error in case of failure.
|
||||
*
|
||||
* int bpf_get_stack(struct pt_regs *regs, void *buf, u32 size, u64 flags)
|
||||
* int bpf_get_stack(void *ctx, void *buf, u32 size, u64 flags)
|
||||
* Description
|
||||
* Return a user or a kernel stack in bpf program provided buffer.
|
||||
* To achieve this, the helper needs *ctx*, which is a pointer
|
||||
@ -1980,7 +1980,7 @@ union bpf_attr {
|
||||
* A non-negative value equal to or less than *size* on success,
|
||||
* or a negative error in case of failure.
|
||||
*
|
||||
* int bpf_skb_load_bytes_relative(const struct sk_buff *skb, u32 offset, void *to, u32 len, u32 start_header)
|
||||
* int bpf_skb_load_bytes_relative(const void *skb, u32 offset, void *to, u32 len, u32 start_header)
|
||||
* Description
|
||||
* This helper is similar to **bpf_skb_load_bytes**\ () in that
|
||||
* it provides an easy way to load *len* bytes from *offset*
|
||||
@ -2033,7 +2033,7 @@ union bpf_attr {
|
||||
* * > 0 one of **BPF_FIB_LKUP_RET_** codes explaining why the
|
||||
* packet is not forwarded or needs assist from full stack
|
||||
*
|
||||
* int bpf_sock_hash_update(struct bpf_sock_ops_kern *skops, struct bpf_map *map, void *key, u64 flags)
|
||||
* int bpf_sock_hash_update(struct bpf_sock_ops *skops, struct bpf_map *map, void *key, u64 flags)
|
||||
* Description
|
||||
* Add an entry to, or update a sockhash *map* referencing sockets.
|
||||
* The *skops* is used as a new value for the entry associated to
|
||||
@ -2392,7 +2392,7 @@ union bpf_attr {
|
||||
* Return
|
||||
* 0 on success, or a negative error in case of failure.
|
||||
*
|
||||
* int bpf_msg_push_data(struct sk_buff *skb, u32 start, u32 len, u64 flags)
|
||||
* int bpf_msg_push_data(struct sk_msg_buff *msg, u32 start, u32 len, u64 flags)
|
||||
* Description
|
||||
* For socket policies, insert *len* bytes into *msg* at offset
|
||||
* *start*.
|
||||
@ -2408,9 +2408,9 @@ union bpf_attr {
|
||||
* Return
|
||||
* 0 on success, or a negative error in case of failure.
|
||||
*
|
||||
* int bpf_msg_pop_data(struct sk_msg_buff *msg, u32 start, u32 pop, u64 flags)
|
||||
* int bpf_msg_pop_data(struct sk_msg_buff *msg, u32 start, u32 len, u64 flags)
|
||||
* Description
|
||||
* Will remove *pop* bytes from a *msg* starting at byte *start*.
|
||||
* Will remove *len* bytes from a *msg* starting at byte *start*.
|
||||
* This may result in **ENOMEM** errors under certain situations if
|
||||
* an allocation and copy are required due to a full ring buffer.
|
||||
* However, the helper will try to avoid doing the allocation
|
||||
@ -2505,7 +2505,7 @@ union bpf_attr {
|
||||
* A **struct bpf_tcp_sock** pointer on success, or **NULL** in
|
||||
* case of failure.
|
||||
*
|
||||
* int bpf_skb_ecn_set_ce(struct sk_buf *skb)
|
||||
* int bpf_skb_ecn_set_ce(struct sk_buff *skb)
|
||||
* Description
|
||||
* Set ECN (Explicit Congestion Notification) field of IP header
|
||||
* to **CE** (Congestion Encountered) if current value is **ECT**
|
||||
|
||||
@ -391,6 +391,154 @@ SEE ALSO
|
||||
|
||||
print('')
|
||||
|
||||
class PrinterHelpers(Printer):
|
||||
"""
|
||||
A printer for dumping collected information about helpers as C header to
|
||||
be included from BPF program.
|
||||
@helpers: array of Helper objects to print to standard output
|
||||
"""
|
||||
|
||||
type_fwds = [
|
||||
'struct bpf_fib_lookup',
|
||||
'struct bpf_perf_event_data',
|
||||
'struct bpf_perf_event_value',
|
||||
'struct bpf_sock',
|
||||
'struct bpf_sock_addr',
|
||||
'struct bpf_sock_ops',
|
||||
'struct bpf_sock_tuple',
|
||||
'struct bpf_spin_lock',
|
||||
'struct bpf_sysctl',
|
||||
'struct bpf_tcp_sock',
|
||||
'struct bpf_tunnel_key',
|
||||
'struct bpf_xfrm_state',
|
||||
'struct pt_regs',
|
||||
'struct sk_reuseport_md',
|
||||
'struct sockaddr',
|
||||
'struct tcphdr',
|
||||
|
||||
'struct __sk_buff',
|
||||
'struct sk_msg_md',
|
||||
'struct xpd_md',
|
||||
]
|
||||
known_types = {
|
||||
'...',
|
||||
'void',
|
||||
'const void',
|
||||
'char',
|
||||
'const char',
|
||||
'int',
|
||||
'long',
|
||||
'unsigned long',
|
||||
|
||||
'__be16',
|
||||
'__be32',
|
||||
'__wsum',
|
||||
|
||||
'struct bpf_fib_lookup',
|
||||
'struct bpf_perf_event_data',
|
||||
'struct bpf_perf_event_value',
|
||||
'struct bpf_sock',
|
||||
'struct bpf_sock_addr',
|
||||
'struct bpf_sock_ops',
|
||||
'struct bpf_sock_tuple',
|
||||
'struct bpf_spin_lock',
|
||||
'struct bpf_sysctl',
|
||||
'struct bpf_tcp_sock',
|
||||
'struct bpf_tunnel_key',
|
||||
'struct bpf_xfrm_state',
|
||||
'struct pt_regs',
|
||||
'struct sk_reuseport_md',
|
||||
'struct sockaddr',
|
||||
'struct tcphdr',
|
||||
}
|
||||
mapped_types = {
|
||||
'u8': '__u8',
|
||||
'u16': '__u16',
|
||||
'u32': '__u32',
|
||||
'u64': '__u64',
|
||||
's8': '__s8',
|
||||
's16': '__s16',
|
||||
's32': '__s32',
|
||||
's64': '__s64',
|
||||
'size_t': 'unsigned long',
|
||||
'struct bpf_map': 'void',
|
||||
'struct sk_buff': 'struct __sk_buff',
|
||||
'const struct sk_buff': 'const struct __sk_buff',
|
||||
'struct sk_msg_buff': 'struct sk_msg_md',
|
||||
'struct xdp_buff': 'struct xdp_md',
|
||||
}
|
||||
|
||||
def print_header(self):
|
||||
header = '''\
|
||||
/* This is auto-generated file. See bpf_helpers_doc.py for details. */
|
||||
|
||||
/* Forward declarations of BPF structs */'''
|
||||
|
||||
print(header)
|
||||
for fwd in self.type_fwds:
|
||||
print('%s;' % fwd)
|
||||
print('')
|
||||
|
||||
def print_footer(self):
|
||||
footer = ''
|
||||
print(footer)
|
||||
|
||||
def map_type(self, t):
|
||||
if t in self.known_types:
|
||||
return t
|
||||
if t in self.mapped_types:
|
||||
return self.mapped_types[t]
|
||||
print("")
|
||||
print("Unrecognized type '%s', please add it to known types!" % t)
|
||||
sys.exit(1)
|
||||
|
||||
seen_helpers = set()
|
||||
|
||||
def print_one(self, helper):
|
||||
proto = helper.proto_break_down()
|
||||
|
||||
if proto['name'] in self.seen_helpers:
|
||||
return
|
||||
self.seen_helpers.add(proto['name'])
|
||||
|
||||
print('/*')
|
||||
print(" * %s" % proto['name'])
|
||||
print(" *")
|
||||
if (helper.desc):
|
||||
# Do not strip all newline characters: formatted code at the end of
|
||||
# a section must be followed by a blank line.
|
||||
for line in re.sub('\n$', '', helper.desc, count=1).split('\n'):
|
||||
print(' *{}{}'.format(' \t' if line else '', line))
|
||||
|
||||
if (helper.ret):
|
||||
print(' *')
|
||||
print(' * Returns')
|
||||
for line in helper.ret.rstrip().split('\n'):
|
||||
print(' *{}{}'.format(' \t' if line else '', line))
|
||||
|
||||
print(' */')
|
||||
print('static %s %s(*%s)(' % (self.map_type(proto['ret_type']),
|
||||
proto['ret_star'], proto['name']), end='')
|
||||
comma = ''
|
||||
for i, a in enumerate(proto['args']):
|
||||
t = a['type']
|
||||
n = a['name']
|
||||
if proto['name'] == 'bpf_get_socket_cookie' and i == 0:
|
||||
t = 'void'
|
||||
n = 'ctx'
|
||||
one_arg = '{}{}'.format(comma, self.map_type(t))
|
||||
if n:
|
||||
if a['star']:
|
||||
one_arg += ' {}'.format(a['star'])
|
||||
else:
|
||||
one_arg += ' '
|
||||
one_arg += '{}'.format(n)
|
||||
comma = ', '
|
||||
print(one_arg, end='')
|
||||
|
||||
print(') = (void *) %d;' % len(self.seen_helpers))
|
||||
print('')
|
||||
|
||||
###############################################################################
|
||||
|
||||
# If script is launched from scripts/ from kernel tree and can access
|
||||
@ -405,6 +553,8 @@ Parse eBPF header file and generate documentation for eBPF helper functions.
|
||||
The RST-formatted output produced can be turned into a manual page with the
|
||||
rst2man utility.
|
||||
""")
|
||||
argParser.add_argument('--header', action='store_true',
|
||||
help='generate C header file')
|
||||
if (os.path.isfile(bpfh)):
|
||||
argParser.add_argument('--filename', help='path to include/uapi/linux/bpf.h',
|
||||
default=bpfh)
|
||||
@ -417,5 +567,8 @@ headerParser = HeaderParser(args.filename)
|
||||
headerParser.run()
|
||||
|
||||
# Print formatted output to standard output.
|
||||
printer = PrinterRST(headerParser.helpers)
|
||||
if args.header:
|
||||
printer = PrinterHelpers(headerParser.helpers)
|
||||
else:
|
||||
printer = PrinterRST(headerParser.helpers)
|
||||
printer.print_all()
|
||||
|
||||
@ -794,7 +794,7 @@ union bpf_attr {
|
||||
* A 64-bit integer containing the current GID and UID, and
|
||||
* created as such: *current_gid* **<< 32 \|** *current_uid*.
|
||||
*
|
||||
* int bpf_get_current_comm(char *buf, u32 size_of_buf)
|
||||
* int bpf_get_current_comm(void *buf, u32 size_of_buf)
|
||||
* Description
|
||||
* Copy the **comm** attribute of the current task into *buf* of
|
||||
* *size_of_buf*. The **comm** attribute contains the name of
|
||||
@ -1023,7 +1023,7 @@ union bpf_attr {
|
||||
* The realm of the route for the packet associated to *skb*, or 0
|
||||
* if none was found.
|
||||
*
|
||||
* int bpf_perf_event_output(struct pt_regs *ctx, struct bpf_map *map, u64 flags, void *data, u64 size)
|
||||
* int bpf_perf_event_output(void *ctx, struct bpf_map *map, u64 flags, void *data, u64 size)
|
||||
* Description
|
||||
* Write raw *data* blob into a special BPF perf event held by
|
||||
* *map* of type **BPF_MAP_TYPE_PERF_EVENT_ARRAY**. This perf
|
||||
@ -1068,7 +1068,7 @@ union bpf_attr {
|
||||
* Return
|
||||
* 0 on success, or a negative error in case of failure.
|
||||
*
|
||||
* int bpf_skb_load_bytes(const struct sk_buff *skb, u32 offset, void *to, u32 len)
|
||||
* int bpf_skb_load_bytes(const void *skb, u32 offset, void *to, u32 len)
|
||||
* Description
|
||||
* This helper was provided as an easy way to load data from a
|
||||
* packet. It can be used to load *len* bytes from *offset* from
|
||||
@ -1085,7 +1085,7 @@ union bpf_attr {
|
||||
* Return
|
||||
* 0 on success, or a negative error in case of failure.
|
||||
*
|
||||
* int bpf_get_stackid(struct pt_regs *ctx, struct bpf_map *map, u64 flags)
|
||||
* int bpf_get_stackid(void *ctx, struct bpf_map *map, u64 flags)
|
||||
* Description
|
||||
* Walk a user or a kernel stack and return its id. To achieve
|
||||
* this, the helper needs *ctx*, which is a pointer to the context
|
||||
@ -1154,7 +1154,7 @@ union bpf_attr {
|
||||
* The checksum result, or a negative error code in case of
|
||||
* failure.
|
||||
*
|
||||
* int bpf_skb_get_tunnel_opt(struct sk_buff *skb, u8 *opt, u32 size)
|
||||
* int bpf_skb_get_tunnel_opt(struct sk_buff *skb, void *opt, u32 size)
|
||||
* Description
|
||||
* Retrieve tunnel options metadata for the packet associated to
|
||||
* *skb*, and store the raw tunnel option data to the buffer *opt*
|
||||
@ -1172,7 +1172,7 @@ union bpf_attr {
|
||||
* Return
|
||||
* The size of the option data retrieved.
|
||||
*
|
||||
* int bpf_skb_set_tunnel_opt(struct sk_buff *skb, u8 *opt, u32 size)
|
||||
* int bpf_skb_set_tunnel_opt(struct sk_buff *skb, void *opt, u32 size)
|
||||
* Description
|
||||
* Set tunnel options metadata for the packet associated to *skb*
|
||||
* to the option data contained in the raw buffer *opt* of *size*.
|
||||
@ -1511,7 +1511,7 @@ union bpf_attr {
|
||||
* Return
|
||||
* 0
|
||||
*
|
||||
* int bpf_setsockopt(struct bpf_sock_ops *bpf_socket, int level, int optname, char *optval, int optlen)
|
||||
* int bpf_setsockopt(struct bpf_sock_ops *bpf_socket, int level, int optname, void *optval, int optlen)
|
||||
* Description
|
||||
* Emulate a call to **setsockopt()** on the socket associated to
|
||||
* *bpf_socket*, which must be a full socket. The *level* at
|
||||
@ -1595,7 +1595,7 @@ union bpf_attr {
|
||||
* Return
|
||||
* **XDP_REDIRECT** on success, or **XDP_ABORTED** on error.
|
||||
*
|
||||
* int bpf_sk_redirect_map(struct bpf_map *map, u32 key, u64 flags)
|
||||
* int bpf_sk_redirect_map(struct sk_buff *skb, struct bpf_map *map, u32 key, u64 flags)
|
||||
* Description
|
||||
* Redirect the packet to the socket referenced by *map* (of type
|
||||
* **BPF_MAP_TYPE_SOCKMAP**) at index *key*. Both ingress and
|
||||
@ -1715,7 +1715,7 @@ union bpf_attr {
|
||||
* Return
|
||||
* 0 on success, or a negative error in case of failure.
|
||||
*
|
||||
* int bpf_getsockopt(struct bpf_sock_ops *bpf_socket, int level, int optname, char *optval, int optlen)
|
||||
* int bpf_getsockopt(struct bpf_sock_ops *bpf_socket, int level, int optname, void *optval, int optlen)
|
||||
* Description
|
||||
* Emulate a call to **getsockopt()** on the socket associated to
|
||||
* *bpf_socket*, which must be a full socket. The *level* at
|
||||
@ -1947,7 +1947,7 @@ union bpf_attr {
|
||||
* Return
|
||||
* 0 on success, or a negative error in case of failure.
|
||||
*
|
||||
* int bpf_get_stack(struct pt_regs *regs, void *buf, u32 size, u64 flags)
|
||||
* int bpf_get_stack(void *ctx, void *buf, u32 size, u64 flags)
|
||||
* Description
|
||||
* Return a user or a kernel stack in bpf program provided buffer.
|
||||
* To achieve this, the helper needs *ctx*, which is a pointer
|
||||
@ -1980,7 +1980,7 @@ union bpf_attr {
|
||||
* A non-negative value equal to or less than *size* on success,
|
||||
* or a negative error in case of failure.
|
||||
*
|
||||
* int bpf_skb_load_bytes_relative(const struct sk_buff *skb, u32 offset, void *to, u32 len, u32 start_header)
|
||||
* int bpf_skb_load_bytes_relative(const void *skb, u32 offset, void *to, u32 len, u32 start_header)
|
||||
* Description
|
||||
* This helper is similar to **bpf_skb_load_bytes**\ () in that
|
||||
* it provides an easy way to load *len* bytes from *offset*
|
||||
@ -2033,7 +2033,7 @@ union bpf_attr {
|
||||
* * > 0 one of **BPF_FIB_LKUP_RET_** codes explaining why the
|
||||
* packet is not forwarded or needs assist from full stack
|
||||
*
|
||||
* int bpf_sock_hash_update(struct bpf_sock_ops_kern *skops, struct bpf_map *map, void *key, u64 flags)
|
||||
* int bpf_sock_hash_update(struct bpf_sock_ops *skops, struct bpf_map *map, void *key, u64 flags)
|
||||
* Description
|
||||
* Add an entry to, or update a sockhash *map* referencing sockets.
|
||||
* The *skops* is used as a new value for the entry associated to
|
||||
@ -2392,7 +2392,7 @@ union bpf_attr {
|
||||
* Return
|
||||
* 0 on success, or a negative error in case of failure.
|
||||
*
|
||||
* int bpf_msg_push_data(struct sk_buff *skb, u32 start, u32 len, u64 flags)
|
||||
* int bpf_msg_push_data(struct sk_msg_buff *msg, u32 start, u32 len, u64 flags)
|
||||
* Description
|
||||
* For socket policies, insert *len* bytes into *msg* at offset
|
||||
* *start*.
|
||||
@ -2408,9 +2408,9 @@ union bpf_attr {
|
||||
* Return
|
||||
* 0 on success, or a negative error in case of failure.
|
||||
*
|
||||
* int bpf_msg_pop_data(struct sk_msg_buff *msg, u32 start, u32 pop, u64 flags)
|
||||
* int bpf_msg_pop_data(struct sk_msg_buff *msg, u32 start, u32 len, u64 flags)
|
||||
* Description
|
||||
* Will remove *pop* bytes from a *msg* starting at byte *start*.
|
||||
* Will remove *len* bytes from a *msg* starting at byte *start*.
|
||||
* This may result in **ENOMEM** errors under certain situations if
|
||||
* an allocation and copy are required due to a full ring buffer.
|
||||
* However, the helper will try to avoid doing the allocation
|
||||
@ -2505,7 +2505,7 @@ union bpf_attr {
|
||||
* A **struct bpf_tcp_sock** pointer on success, or **NULL** in
|
||||
* case of failure.
|
||||
*
|
||||
* int bpf_skb_ecn_set_ce(struct sk_buf *skb)
|
||||
* int bpf_skb_ecn_set_ce(struct sk_buff *skb)
|
||||
* Description
|
||||
* Set ECN (Explicit Congestion Notification) field of IP header
|
||||
* to **CE** (Congestion Encountered) if current value is **ECT**
|
||||
|
||||
1
tools/testing/selftests/bpf/.gitignore
vendored
1
tools/testing/selftests/bpf/.gitignore
vendored
@ -39,3 +39,4 @@ libbpf.so.*
|
||||
test_hashmap
|
||||
test_btf_dump
|
||||
xdping
|
||||
/bpf_helper_defs.h
|
||||
|
||||
@ -90,6 +90,10 @@ include ../lib.mk
|
||||
TEST_CUSTOM_PROGS = $(OUTPUT)/urandom_read
|
||||
all: $(TEST_CUSTOM_PROGS)
|
||||
|
||||
bpf_helper_defs.h: $(APIDIR)/linux/bpf.h
|
||||
$(BPFDIR)/../../../scripts/bpf_helpers_doc.py --header \
|
||||
--file $(APIDIR)/linux/bpf.h > bpf_helper_defs.h
|
||||
|
||||
$(OUTPUT)/urandom_read: $(OUTPUT)/%: %.c
|
||||
$(CC) -o $@ $< -Wl,--build-id
|
||||
|
||||
@ -123,7 +127,7 @@ $(OUTPUT)/test_cgroup_attach: cgroup_helpers.c
|
||||
# force a rebuild of BPFOBJ when its dependencies are updated
|
||||
force:
|
||||
|
||||
$(BPFOBJ): force
|
||||
$(BPFOBJ): force bpf_helper_defs.h
|
||||
$(MAKE) -C $(BPFDIR) OUTPUT=$(OUTPUT)/
|
||||
|
||||
PROBE := $(shell $(LLC) -march=bpf -mcpu=probe -filetype=null /dev/null 2>&1)
|
||||
@ -319,4 +323,4 @@ $(VERIFIER_TESTS_H): $(VERIFIER_TEST_FILES) | $(VERIFIER_TESTS_DIR)
|
||||
|
||||
EXTRA_CLEAN := $(TEST_CUSTOM_PROGS) $(ALU32_BUILD_DIR) $(BPF_GCC_BUILD_DIR) \
|
||||
$(VERIFIER_TESTS_H) $(PROG_TESTS_H) $(MAP_TESTS_H) \
|
||||
feature
|
||||
feature bpf_helper_defs.h
|
||||
|
||||
@ -2,6 +2,8 @@
|
||||
#ifndef __BPF_HELPERS__
|
||||
#define __BPF_HELPERS__
|
||||
|
||||
#include "bpf_helper_defs.h"
|
||||
|
||||
#define __uint(name, val) int (*name)[val]
|
||||
#define __type(name, val) typeof(val) *name
|
||||
|
||||
@ -21,219 +23,6 @@
|
||||
*/
|
||||
#define SEC(NAME) __attribute__((section(NAME), used))
|
||||
|
||||
/* helper functions called from eBPF programs written in C */
|
||||
static void *(*bpf_map_lookup_elem)(void *map, const void *key) =
|
||||
(void *) BPF_FUNC_map_lookup_elem;
|
||||
static int (*bpf_map_update_elem)(void *map, const void *key, const void *value,
|
||||
unsigned long long flags) =
|
||||
(void *) BPF_FUNC_map_update_elem;
|
||||
static int (*bpf_map_delete_elem)(void *map, const void *key) =
|
||||
(void *) BPF_FUNC_map_delete_elem;
|
||||
static int (*bpf_map_push_elem)(void *map, const void *value,
|
||||
unsigned long long flags) =
|
||||
(void *) BPF_FUNC_map_push_elem;
|
||||
static int (*bpf_map_pop_elem)(void *map, void *value) =
|
||||
(void *) BPF_FUNC_map_pop_elem;
|
||||
static int (*bpf_map_peek_elem)(void *map, void *value) =
|
||||
(void *) BPF_FUNC_map_peek_elem;
|
||||
static int (*bpf_probe_read)(void *dst, int size, const void *unsafe_ptr) =
|
||||
(void *) BPF_FUNC_probe_read;
|
||||
static unsigned long long (*bpf_ktime_get_ns)(void) =
|
||||
(void *) BPF_FUNC_ktime_get_ns;
|
||||
static int (*bpf_trace_printk)(const char *fmt, int fmt_size, ...) =
|
||||
(void *) BPF_FUNC_trace_printk;
|
||||
static void (*bpf_tail_call)(void *ctx, void *map, int index) =
|
||||
(void *) BPF_FUNC_tail_call;
|
||||
static unsigned long long (*bpf_get_smp_processor_id)(void) =
|
||||
(void *) BPF_FUNC_get_smp_processor_id;
|
||||
static unsigned long long (*bpf_get_current_pid_tgid)(void) =
|
||||
(void *) BPF_FUNC_get_current_pid_tgid;
|
||||
static unsigned long long (*bpf_get_current_uid_gid)(void) =
|
||||
(void *) BPF_FUNC_get_current_uid_gid;
|
||||
static int (*bpf_get_current_comm)(void *buf, int buf_size) =
|
||||
(void *) BPF_FUNC_get_current_comm;
|
||||
static unsigned long long (*bpf_perf_event_read)(void *map,
|
||||
unsigned long long flags) =
|
||||
(void *) BPF_FUNC_perf_event_read;
|
||||
static int (*bpf_clone_redirect)(void *ctx, int ifindex, int flags) =
|
||||
(void *) BPF_FUNC_clone_redirect;
|
||||
static int (*bpf_redirect)(int ifindex, int flags) =
|
||||
(void *) BPF_FUNC_redirect;
|
||||
static int (*bpf_redirect_map)(void *map, int key, int flags) =
|
||||
(void *) BPF_FUNC_redirect_map;
|
||||
static int (*bpf_perf_event_output)(void *ctx, void *map,
|
||||
unsigned long long flags, void *data,
|
||||
int size) =
|
||||
(void *) BPF_FUNC_perf_event_output;
|
||||
static int (*bpf_get_stackid)(void *ctx, void *map, int flags) =
|
||||
(void *) BPF_FUNC_get_stackid;
|
||||
static int (*bpf_probe_write_user)(void *dst, const void *src, int size) =
|
||||
(void *) BPF_FUNC_probe_write_user;
|
||||
static int (*bpf_current_task_under_cgroup)(void *map, int index) =
|
||||
(void *) BPF_FUNC_current_task_under_cgroup;
|
||||
static int (*bpf_skb_get_tunnel_key)(void *ctx, void *key, int size, int flags) =
|
||||
(void *) BPF_FUNC_skb_get_tunnel_key;
|
||||
static int (*bpf_skb_set_tunnel_key)(void *ctx, void *key, int size, int flags) =
|
||||
(void *) BPF_FUNC_skb_set_tunnel_key;
|
||||
static int (*bpf_skb_get_tunnel_opt)(void *ctx, void *md, int size) =
|
||||
(void *) BPF_FUNC_skb_get_tunnel_opt;
|
||||
static int (*bpf_skb_set_tunnel_opt)(void *ctx, void *md, int size) =
|
||||
(void *) BPF_FUNC_skb_set_tunnel_opt;
|
||||
static unsigned long long (*bpf_get_prandom_u32)(void) =
|
||||
(void *) BPF_FUNC_get_prandom_u32;
|
||||
static int (*bpf_xdp_adjust_head)(void *ctx, int offset) =
|
||||
(void *) BPF_FUNC_xdp_adjust_head;
|
||||
static int (*bpf_xdp_adjust_meta)(void *ctx, int offset) =
|
||||
(void *) BPF_FUNC_xdp_adjust_meta;
|
||||
static int (*bpf_get_socket_cookie)(void *ctx) =
|
||||
(void *) BPF_FUNC_get_socket_cookie;
|
||||
static int (*bpf_setsockopt)(void *ctx, int level, int optname, void *optval,
|
||||
int optlen) =
|
||||
(void *) BPF_FUNC_setsockopt;
|
||||
static int (*bpf_getsockopt)(void *ctx, int level, int optname, void *optval,
|
||||
int optlen) =
|
||||
(void *) BPF_FUNC_getsockopt;
|
||||
static int (*bpf_sock_ops_cb_flags_set)(void *ctx, int flags) =
|
||||
(void *) BPF_FUNC_sock_ops_cb_flags_set;
|
||||
static int (*bpf_sk_redirect_map)(void *ctx, void *map, int key, int flags) =
|
||||
(void *) BPF_FUNC_sk_redirect_map;
|
||||
static int (*bpf_sk_redirect_hash)(void *ctx, void *map, void *key, int flags) =
|
||||
(void *) BPF_FUNC_sk_redirect_hash;
|
||||
static int (*bpf_sock_map_update)(void *map, void *key, void *value,
|
||||
unsigned long long flags) =
|
||||
(void *) BPF_FUNC_sock_map_update;
|
||||
static int (*bpf_sock_hash_update)(void *map, void *key, void *value,
|
||||
unsigned long long flags) =
|
||||
(void *) BPF_FUNC_sock_hash_update;
|
||||
static int (*bpf_perf_event_read_value)(void *map, unsigned long long flags,
|
||||
void *buf, unsigned int buf_size) =
|
||||
(void *) BPF_FUNC_perf_event_read_value;
|
||||
static int (*bpf_perf_prog_read_value)(void *ctx, void *buf,
|
||||
unsigned int buf_size) =
|
||||
(void *) BPF_FUNC_perf_prog_read_value;
|
||||
static int (*bpf_override_return)(void *ctx, unsigned long rc) =
|
||||
(void *) BPF_FUNC_override_return;
|
||||
static int (*bpf_msg_redirect_map)(void *ctx, void *map, int key, int flags) =
|
||||
(void *) BPF_FUNC_msg_redirect_map;
|
||||
static int (*bpf_msg_redirect_hash)(void *ctx,
|
||||
void *map, void *key, int flags) =
|
||||
(void *) BPF_FUNC_msg_redirect_hash;
|
||||
static int (*bpf_msg_apply_bytes)(void *ctx, int len) =
|
||||
(void *) BPF_FUNC_msg_apply_bytes;
|
||||
static int (*bpf_msg_cork_bytes)(void *ctx, int len) =
|
||||
(void *) BPF_FUNC_msg_cork_bytes;
|
||||
static int (*bpf_msg_pull_data)(void *ctx, int start, int end, int flags) =
|
||||
(void *) BPF_FUNC_msg_pull_data;
|
||||
static int (*bpf_msg_push_data)(void *ctx, int start, int end, int flags) =
|
||||
(void *) BPF_FUNC_msg_push_data;
|
||||
static int (*bpf_msg_pop_data)(void *ctx, int start, int cut, int flags) =
|
||||
(void *) BPF_FUNC_msg_pop_data;
|
||||
static int (*bpf_bind)(void *ctx, void *addr, int addr_len) =
|
||||
(void *) BPF_FUNC_bind;
|
||||
static int (*bpf_xdp_adjust_tail)(void *ctx, int offset) =
|
||||
(void *) BPF_FUNC_xdp_adjust_tail;
|
||||
static int (*bpf_skb_get_xfrm_state)(void *ctx, int index, void *state,
|
||||
int size, int flags) =
|
||||
(void *) BPF_FUNC_skb_get_xfrm_state;
|
||||
static int (*bpf_sk_select_reuseport)(void *ctx, void *map, void *key, __u32 flags) =
|
||||
(void *) BPF_FUNC_sk_select_reuseport;
|
||||
static int (*bpf_get_stack)(void *ctx, void *buf, int size, int flags) =
|
||||
(void *) BPF_FUNC_get_stack;
|
||||
static int (*bpf_fib_lookup)(void *ctx, struct bpf_fib_lookup *params,
|
||||
int plen, __u32 flags) =
|
||||
(void *) BPF_FUNC_fib_lookup;
|
||||
static int (*bpf_lwt_push_encap)(void *ctx, unsigned int type, void *hdr,
|
||||
unsigned int len) =
|
||||
(void *) BPF_FUNC_lwt_push_encap;
|
||||
static int (*bpf_lwt_seg6_store_bytes)(void *ctx, unsigned int offset,
|
||||
void *from, unsigned int len) =
|
||||
(void *) BPF_FUNC_lwt_seg6_store_bytes;
|
||||
static int (*bpf_lwt_seg6_action)(void *ctx, unsigned int action, void *param,
|
||||
unsigned int param_len) =
|
||||
(void *) BPF_FUNC_lwt_seg6_action;
|
||||
static int (*bpf_lwt_seg6_adjust_srh)(void *ctx, unsigned int offset,
|
||||
unsigned int len) =
|
||||
(void *) BPF_FUNC_lwt_seg6_adjust_srh;
|
||||
static int (*bpf_rc_repeat)(void *ctx) =
|
||||
(void *) BPF_FUNC_rc_repeat;
|
||||
static int (*bpf_rc_keydown)(void *ctx, unsigned int protocol,
|
||||
unsigned long long scancode, unsigned int toggle) =
|
||||
(void *) BPF_FUNC_rc_keydown;
|
||||
static unsigned long long (*bpf_get_current_cgroup_id)(void) =
|
||||
(void *) BPF_FUNC_get_current_cgroup_id;
|
||||
static void *(*bpf_get_local_storage)(void *map, unsigned long long flags) =
|
||||
(void *) BPF_FUNC_get_local_storage;
|
||||
static unsigned long long (*bpf_skb_cgroup_id)(void *ctx) =
|
||||
(void *) BPF_FUNC_skb_cgroup_id;
|
||||
static unsigned long long (*bpf_skb_ancestor_cgroup_id)(void *ctx, int level) =
|
||||
(void *) BPF_FUNC_skb_ancestor_cgroup_id;
|
||||
static struct bpf_sock *(*bpf_sk_lookup_tcp)(void *ctx,
|
||||
struct bpf_sock_tuple *tuple,
|
||||
int size, unsigned long long netns_id,
|
||||
unsigned long long flags) =
|
||||
(void *) BPF_FUNC_sk_lookup_tcp;
|
||||
static struct bpf_sock *(*bpf_skc_lookup_tcp)(void *ctx,
|
||||
struct bpf_sock_tuple *tuple,
|
||||
int size, unsigned long long netns_id,
|
||||
unsigned long long flags) =
|
||||
(void *) BPF_FUNC_skc_lookup_tcp;
|
||||
static struct bpf_sock *(*bpf_sk_lookup_udp)(void *ctx,
|
||||
struct bpf_sock_tuple *tuple,
|
||||
int size, unsigned long long netns_id,
|
||||
unsigned long long flags) =
|
||||
(void *) BPF_FUNC_sk_lookup_udp;
|
||||
static int (*bpf_sk_release)(struct bpf_sock *sk) =
|
||||
(void *) BPF_FUNC_sk_release;
|
||||
static int (*bpf_skb_vlan_push)(void *ctx, __be16 vlan_proto, __u16 vlan_tci) =
|
||||
(void *) BPF_FUNC_skb_vlan_push;
|
||||
static int (*bpf_skb_vlan_pop)(void *ctx) =
|
||||
(void *) BPF_FUNC_skb_vlan_pop;
|
||||
static int (*bpf_rc_pointer_rel)(void *ctx, int rel_x, int rel_y) =
|
||||
(void *) BPF_FUNC_rc_pointer_rel;
|
||||
static void (*bpf_spin_lock)(struct bpf_spin_lock *lock) =
|
||||
(void *) BPF_FUNC_spin_lock;
|
||||
static void (*bpf_spin_unlock)(struct bpf_spin_lock *lock) =
|
||||
(void *) BPF_FUNC_spin_unlock;
|
||||
static struct bpf_sock *(*bpf_sk_fullsock)(struct bpf_sock *sk) =
|
||||
(void *) BPF_FUNC_sk_fullsock;
|
||||
static struct bpf_tcp_sock *(*bpf_tcp_sock)(struct bpf_sock *sk) =
|
||||
(void *) BPF_FUNC_tcp_sock;
|
||||
static struct bpf_sock *(*bpf_get_listener_sock)(struct bpf_sock *sk) =
|
||||
(void *) BPF_FUNC_get_listener_sock;
|
||||
static int (*bpf_skb_ecn_set_ce)(void *ctx) =
|
||||
(void *) BPF_FUNC_skb_ecn_set_ce;
|
||||
static int (*bpf_tcp_check_syncookie)(struct bpf_sock *sk,
|
||||
void *ip, int ip_len, void *tcp, int tcp_len) =
|
||||
(void *) BPF_FUNC_tcp_check_syncookie;
|
||||
static int (*bpf_sysctl_get_name)(void *ctx, char *buf,
|
||||
unsigned long long buf_len,
|
||||
unsigned long long flags) =
|
||||
(void *) BPF_FUNC_sysctl_get_name;
|
||||
static int (*bpf_sysctl_get_current_value)(void *ctx, char *buf,
|
||||
unsigned long long buf_len) =
|
||||
(void *) BPF_FUNC_sysctl_get_current_value;
|
||||
static int (*bpf_sysctl_get_new_value)(void *ctx, char *buf,
|
||||
unsigned long long buf_len) =
|
||||
(void *) BPF_FUNC_sysctl_get_new_value;
|
||||
static int (*bpf_sysctl_set_new_value)(void *ctx, const char *buf,
|
||||
unsigned long long buf_len) =
|
||||
(void *) BPF_FUNC_sysctl_set_new_value;
|
||||
static int (*bpf_strtol)(const char *buf, unsigned long long buf_len,
|
||||
unsigned long long flags, long *res) =
|
||||
(void *) BPF_FUNC_strtol;
|
||||
static int (*bpf_strtoul)(const char *buf, unsigned long long buf_len,
|
||||
unsigned long long flags, unsigned long *res) =
|
||||
(void *) BPF_FUNC_strtoul;
|
||||
static void *(*bpf_sk_storage_get)(void *map, struct bpf_sock *sk,
|
||||
void *value, __u64 flags) =
|
||||
(void *) BPF_FUNC_sk_storage_get;
|
||||
static int (*bpf_sk_storage_delete)(void *map, struct bpf_sock *sk) =
|
||||
(void *)BPF_FUNC_sk_storage_delete;
|
||||
static int (*bpf_send_signal)(unsigned sig) = (void *)BPF_FUNC_send_signal;
|
||||
static long long (*bpf_tcp_gen_syncookie)(struct bpf_sock *sk, void *ip,
|
||||
int ip_len, void *tcp, int tcp_len) =
|
||||
(void *) BPF_FUNC_tcp_gen_syncookie;
|
||||
|
||||
/* llvm builtin functions that eBPF C program may use to
|
||||
* emit BPF_LD_ABS and BPF_LD_IND instructions
|
||||
*/
|
||||
@ -273,55 +62,6 @@ struct bpf_map_def {
|
||||
__attribute__ ((section(".maps." #name), used)) \
|
||||
____btf_map_##name = { }
|
||||
|
||||
static int (*bpf_skb_load_bytes)(void *ctx, int off, void *to, int len) =
|
||||
(void *) BPF_FUNC_skb_load_bytes;
|
||||
static int (*bpf_skb_load_bytes_relative)(void *ctx, int off, void *to, int len, __u32 start_header) =
|
||||
(void *) BPF_FUNC_skb_load_bytes_relative;
|
||||
static int (*bpf_skb_store_bytes)(void *ctx, int off, void *from, int len, int flags) =
|
||||
(void *) BPF_FUNC_skb_store_bytes;
|
||||
static int (*bpf_l3_csum_replace)(void *ctx, int off, int from, int to, int flags) =
|
||||
(void *) BPF_FUNC_l3_csum_replace;
|
||||
static int (*bpf_l4_csum_replace)(void *ctx, int off, int from, int to, int flags) =
|
||||
(void *) BPF_FUNC_l4_csum_replace;
|
||||
static int (*bpf_csum_diff)(void *from, int from_size, void *to, int to_size, int seed) =
|
||||
(void *) BPF_FUNC_csum_diff;
|
||||
static int (*bpf_skb_under_cgroup)(void *ctx, void *map, int index) =
|
||||
(void *) BPF_FUNC_skb_under_cgroup;
|
||||
static int (*bpf_skb_change_head)(void *, int len, int flags) =
|
||||
(void *) BPF_FUNC_skb_change_head;
|
||||
static int (*bpf_skb_pull_data)(void *, int len) =
|
||||
(void *) BPF_FUNC_skb_pull_data;
|
||||
static unsigned int (*bpf_get_cgroup_classid)(void *ctx) =
|
||||
(void *) BPF_FUNC_get_cgroup_classid;
|
||||
static unsigned int (*bpf_get_route_realm)(void *ctx) =
|
||||
(void *) BPF_FUNC_get_route_realm;
|
||||
static int (*bpf_skb_change_proto)(void *ctx, __be16 proto, __u64 flags) =
|
||||
(void *) BPF_FUNC_skb_change_proto;
|
||||
static int (*bpf_skb_change_type)(void *ctx, __u32 type) =
|
||||
(void *) BPF_FUNC_skb_change_type;
|
||||
static unsigned int (*bpf_get_hash_recalc)(void *ctx) =
|
||||
(void *) BPF_FUNC_get_hash_recalc;
|
||||
static unsigned long long (*bpf_get_current_task)(void) =
|
||||
(void *) BPF_FUNC_get_current_task;
|
||||
static int (*bpf_skb_change_tail)(void *ctx, __u32 len, __u64 flags) =
|
||||
(void *) BPF_FUNC_skb_change_tail;
|
||||
static long long (*bpf_csum_update)(void *ctx, __u32 csum) =
|
||||
(void *) BPF_FUNC_csum_update;
|
||||
static void (*bpf_set_hash_invalid)(void *ctx) =
|
||||
(void *) BPF_FUNC_set_hash_invalid;
|
||||
static int (*bpf_get_numa_node_id)(void) =
|
||||
(void *) BPF_FUNC_get_numa_node_id;
|
||||
static int (*bpf_probe_read_str)(void *ctx, __u32 size,
|
||||
const void *unsafe_ptr) =
|
||||
(void *) BPF_FUNC_probe_read_str;
|
||||
static unsigned int (*bpf_get_socket_uid)(void *ctx) =
|
||||
(void *) BPF_FUNC_get_socket_uid;
|
||||
static unsigned int (*bpf_set_hash)(void *ctx, __u32 hash) =
|
||||
(void *) BPF_FUNC_set_hash;
|
||||
static int (*bpf_skb_adjust_room)(void *ctx, __s32 len_diff, __u32 mode,
|
||||
unsigned long long flags) =
|
||||
(void *) BPF_FUNC_skb_adjust_room;
|
||||
|
||||
/* Scan the ARCH passed in from ARCH env variable (see Makefile) */
|
||||
#if defined(__TARGET_ARCH_x86)
|
||||
#define bpf_target_x86
|
||||
|
||||
Loading…
Reference in New Issue
Block a user