tools lib bpf: Sync {tools,}/include/uapi/linux/bpf.h (0cb34dc2) · Commits · e / devices / android_kernel_teracube_mt6765

tools/include/uapi/linux/bpf.h

+364 −229

Original line number	Diff line number	Diff line
		@@ -73,6 +73,8 @@ enum bpf_cmd {
		BPF_PROG_LOAD,
		BPF_OBJ_PIN,
		BPF_OBJ_GET,
		BPF_PROG_ATTACH,
		BPF_PROG_DETACH,
		};

		enum bpf_map_type {
		@@ -85,6 +87,8 @@ enum bpf_map_type {
		BPF_MAP_TYPE_PERCPU_ARRAY,
		BPF_MAP_TYPE_STACK_TRACE,
		BPF_MAP_TYPE_CGROUP_ARRAY,
		BPF_MAP_TYPE_LRU_HASH,
		BPF_MAP_TYPE_LRU_PERCPU_HASH,
		};

		enum bpf_prog_type {
		@@ -95,8 +99,23 @@ enum bpf_prog_type {
		BPF_PROG_TYPE_SCHED_ACT,
		BPF_PROG_TYPE_TRACEPOINT,
		BPF_PROG_TYPE_XDP,
		BPF_PROG_TYPE_PERF_EVENT,
		BPF_PROG_TYPE_CGROUP_SKB,
		BPF_PROG_TYPE_CGROUP_SOCK,
		BPF_PROG_TYPE_LWT_IN,
		BPF_PROG_TYPE_LWT_OUT,
		BPF_PROG_TYPE_LWT_XMIT,
		};

		enum bpf_attach_type {
		BPF_CGROUP_INET_INGRESS,
		BPF_CGROUP_INET_EGRESS,
		BPF_CGROUP_INET_SOCK_CREATE,
		__MAX_BPF_ATTACH_TYPE
		};

		#define MAX_BPF_ATTACH_TYPE __MAX_BPF_ATTACH_TYPE

		#define BPF_PSEUDO_MAP_FD 1

		/* flags for BPF_MAP_UPDATE_ELEM command */
		@@ -105,6 +124,13 @@ enum bpf_prog_type {
		#define BPF_EXIST 2 /* update existing element */

		#define BPF_F_NO_PREALLOC (1U << 0)
		/* Instead of having one common LRU list in the
		* BPF_MAP_TYPE_LRU_[PERCPU_]HASH map, use a percpu LRU list
		* which can scale and perform better.
		* Note, the LRU nodes (including free nodes) cannot be moved
		* across different LRU lists.
		*/
		#define BPF_F_NO_COMMON_LRU (1U << 1)

		union bpf_attr {
		struct { /* anonymous struct used by BPF_MAP_CREATE command */
		@@ -140,48 +166,62 @@ union bpf_attr {
		__aligned_u64 pathname;
		__u32 bpf_fd;
		};

		struct { /* anonymous struct used by BPF_PROG_ATTACH/DETACH commands */
		__u32 target_fd; /* container object to attach to */
		__u32 attach_bpf_fd; /* eBPF program to attach */
		__u32 attach_type;
		};
		} __attribute__((aligned(8)));

		/* integer value in 'imm' field of BPF_CALL instruction selects which helper
		* function eBPF program intends to call
		*/
		enum bpf_func_id {
		BPF_FUNC_unspec,
		BPF_FUNC_map_lookup_elem, /* void map_lookup_elem(&map, &key) /
		BPF_FUNC_map_update_elem, /* int map_update_elem(&map, &key, &value, flags) */
		BPF_FUNC_map_delete_elem, /* int map_delete_elem(&map, &key) */
		BPF_FUNC_probe_read, /* int bpf_probe_read(void dst, int size, void src) */
		BPF_FUNC_ktime_get_ns, /* u64 bpf_ktime_get_ns(void) */
		BPF_FUNC_trace_printk, /* int bpf_trace_printk(const char fmt, int fmt_size, ...) /
		BPF_FUNC_get_prandom_u32, /* u32 prandom_u32(void) */
		BPF_FUNC_get_smp_processor_id, /* u32 raw_smp_processor_id(void) */

		/**
		* skb_store_bytes(skb, offset, from, len, flags) - store bytes into packet
		/* BPF helper function descriptions:
		*
		* void *bpf_map_lookup_elem(&map, &key)
		* Return: Map value or NULL
		*
		* int bpf_map_update_elem(&map, &key, &value, flags)
		* Return: 0 on success or negative error
		*
		* int bpf_map_delete_elem(&map, &key)
		* Return: 0 on success or negative error
		*
		* int bpf_probe_read(void dst, int size, void src)
		* Return: 0 on success or negative error
		*
		* u64 bpf_ktime_get_ns(void)
		* Return: current ktime
		*
		* int bpf_trace_printk(const char *fmt, int fmt_size, ...)
		* Return: length of buffer written or negative error
		*
		* u32 bpf_prandom_u32(void)
		* Return: random value
		*
		* u32 bpf_raw_smp_processor_id(void)
		* Return: SMP processor ID
		*
		* int bpf_skb_store_bytes(skb, offset, from, len, flags)
		* store bytes into packet
		* @skb: pointer to skb
		* @offset: offset within packet from skb->mac_header
		* @from: pointer where to copy bytes from
		* @len: number of bytes to store into packet
		* @flags: bit 0 - if true, recompute skb->csum
		* other bits - reserved
		* Return: 0 on success
		*/
		BPF_FUNC_skb_store_bytes,

		/**
		* l3_csum_replace(skb, offset, from, to, flags) - recompute IP checksum
		* Return: 0 on success or negative error
		*
		* int bpf_l3_csum_replace(skb, offset, from, to, flags)
		* recompute IP checksum
		* @skb: pointer to skb
		* @offset: offset within packet where IP checksum is located
		* @from: old value of header field
		* @to: new value of header field
		* @flags: bits 0-3 - size of header field
		* other bits - reserved
		* Return: 0 on success
		*/
		BPF_FUNC_l3_csum_replace,

		/**
		* l4_csum_replace(skb, offset, from, to, flags) - recompute TCP/UDP checksum
		* Return: 0 on success or negative error
		*
		* int bpf_l4_csum_replace(skb, offset, from, to, flags)
		* recompute TCP/UDP checksum
		* @skb: pointer to skb
		* @offset: offset within packet where TCP/UDP checksum is located
		* @from: old value of header field
		@@ -189,99 +229,79 @@ enum bpf_func_id {
		* @flags: bits 0-3 - size of header field
		* bit 4 - is pseudo header
		* other bits - reserved
		* Return: 0 on success
		*/
		BPF_FUNC_l4_csum_replace,

		/**
		* bpf_tail_call(ctx, prog_array_map, index) - jump into another BPF program
		* Return: 0 on success or negative error
		*
		* int bpf_tail_call(ctx, prog_array_map, index)
		* jump into another BPF program
		* @ctx: context pointer passed to next program
		* @prog_array_map: pointer to map which type is BPF_MAP_TYPE_PROG_ARRAY
		* @index: index inside array that selects specific program to run
		* Return: 0 on success
		*/
		BPF_FUNC_tail_call,

		/**
		* bpf_clone_redirect(skb, ifindex, flags) - redirect to another netdev
		* Return: 0 on success or negative error
		*
		* int bpf_clone_redirect(skb, ifindex, flags)
		* redirect to another netdev
		* @skb: pointer to skb
		* @ifindex: ifindex of the net device
		* @flags: bit 0 - if set, redirect to ingress instead of egress
		* other bits - reserved
		* Return: 0 on success
		*/
		BPF_FUNC_clone_redirect,

		/**
		* Return: 0 on success or negative error
		*
		* u64 bpf_get_current_pid_tgid(void)
		* Return: current->tgid << 32 \| current->pid
		*/
		BPF_FUNC_get_current_pid_tgid,

		/**
		*
		* u64 bpf_get_current_uid_gid(void)
		* Return: current_gid << 32 \| current_uid
		*/
		BPF_FUNC_get_current_uid_gid,

		/**
		* bpf_get_current_comm(char *buf, int size_of_buf)
		*
		* int bpf_get_current_comm(char *buf, int size_of_buf)
		* stores current->comm into buf
		* Return: 0 on success
		*/
		BPF_FUNC_get_current_comm,

		/**
		* bpf_get_cgroup_classid(skb) - retrieve a proc's classid
		* Return: 0 on success or negative error
		*
		* u32 bpf_get_cgroup_classid(skb)
		* retrieve a proc's classid
		* @skb: pointer to skb
		* Return: classid if != 0
		*/
		BPF_FUNC_get_cgroup_classid,
		BPF_FUNC_skb_vlan_push, /* bpf_skb_vlan_push(skb, vlan_proto, vlan_tci) */
		BPF_FUNC_skb_vlan_pop, /* bpf_skb_vlan_pop(skb) */

		/**
		* bpf_skb_[gs]et_tunnel_key(skb, key, size, flags)
		*
		* int bpf_skb_vlan_push(skb, vlan_proto, vlan_tci)
		* Return: 0 on success or negative error
		*
		* int bpf_skb_vlan_pop(skb)
		* Return: 0 on success or negative error
		*
		* int bpf_skb_get_tunnel_key(skb, key, size, flags)
		* int bpf_skb_set_tunnel_key(skb, key, size, flags)
		* retrieve or populate tunnel metadata
		* @skb: pointer to skb
		* @key: pointer to 'struct bpf_tunnel_key'
		* @size: size of 'struct bpf_tunnel_key'
		* @flags: room for future extensions
		* Retrun: 0 on success
		*/
		BPF_FUNC_skb_get_tunnel_key,
		BPF_FUNC_skb_set_tunnel_key,
		BPF_FUNC_perf_event_read, /* u64 bpf_perf_event_read(&map, index) */
		/**
		* bpf_redirect(ifindex, flags) - redirect to another netdev
		* Return: 0 on success or negative error
		*
		* u64 bpf_perf_event_read(&map, index)
		* Return: Number events read or error code
		*
		* int bpf_redirect(ifindex, flags)
		* redirect to another netdev
		* @ifindex: ifindex of the net device
		* @flags: bit 0 - if set, redirect to ingress instead of egress
		* other bits - reserved
		* Return: TC_ACT_REDIRECT
		*/
		BPF_FUNC_redirect,

		/**
		* bpf_get_route_realm(skb) - retrieve a dst's tclassid
		*
		* u32 bpf_get_route_realm(skb)
		* retrieve a dst's tclassid
		* @skb: pointer to skb
		* Return: realm if != 0
		*/
		BPF_FUNC_get_route_realm,

		/**
		* bpf_perf_event_output(ctx, map, index, data, size) - output perf raw sample
		*
		* int bpf_perf_event_output(ctx, map, index, data, size)
		* output perf raw sample
		* @ctx: struct pt_regs*
		* @map: pointer to perf_event_array map
		* @index: index of event in the map
		* @data: data on stack to be output as raw data
		* @size: size of data
		* Return: 0 on success
		*/
		BPF_FUNC_perf_event_output,
		BPF_FUNC_skb_load_bytes,

		/**
		* bpf_get_stackid(ctx, map, flags) - walk user or kernel stack and return id
		* Return: 0 on success or negative error
		*
		* int bpf_get_stackid(ctx, map, flags)
		* walk user or kernel stack and return id
		* @ctx: struct pt_regs*
		* @map: pointer to stack_trace map
		* @flags: bits 0-7 - numer of stack frames to skip
		@@ -291,55 +311,48 @@ enum bpf_func_id {
		* discard old
		* other bits - reserved
		* Return: >= 0 stackid on success or negative error
		*/
		BPF_FUNC_get_stackid,

		/**
		* bpf_csum_diff(from, from_size, to, to_size, seed) - calculate csum diff
		*
		* s64 bpf_csum_diff(from, from_size, to, to_size, seed)
		* calculate csum diff
		* @from: raw from buffer
		* @from_size: length of from buffer
		* @to: raw to buffer
		* @to_size: length of to buffer
		* @seed: optional seed
		* Return: csum result
		*/
		BPF_FUNC_csum_diff,

		/**
		* bpf_skb_[gs]et_tunnel_opt(skb, opt, size)
		* retrieve or populate tunnel options metadata
		* Return: csum result or negative error code
		*
		* int bpf_skb_get_tunnel_opt(skb, opt, size)
		* retrieve tunnel options metadata
		* @skb: pointer to skb
		* @opt: pointer to raw tunnel option data
		* @size: size of @opt
		* Return: 0 on success for set, option size for get
		*/
		BPF_FUNC_skb_get_tunnel_opt,
		BPF_FUNC_skb_set_tunnel_opt,

		/**
		* bpf_skb_change_proto(skb, proto, flags)
		* Change protocol of the skb. Currently supported is
		* v4 -> v6, v6 -> v4 transitions. The helper will also
		* resize the skb. eBPF program is expected to fill the
		* new headers via skb_store_bytes and lX_csum_replace.
		* Return: option size
		*
		* int bpf_skb_set_tunnel_opt(skb, opt, size)
		* populate tunnel options metadata
		* @skb: pointer to skb
		* @opt: pointer to raw tunnel option data
		* @size: size of @opt
		* Return: 0 on success or negative error
		*
		* int bpf_skb_change_proto(skb, proto, flags)
		* Change protocol of the skb. Currently supported is v4 -> v6,
		* v6 -> v4 transitions. The helper will also resize the skb. eBPF
		* program is expected to fill the new headers via skb_store_bytes
		* and lX_csum_replace.
		* @skb: pointer to skb
		* @proto: new skb->protocol type
		* @flags: reserved
		* Return: 0 on success or negative error
		*/
		BPF_FUNC_skb_change_proto,

		/**
		* bpf_skb_change_type(skb, type)
		*
		* int bpf_skb_change_type(skb, type)
		* Change packet type of skb.
		* @skb: pointer to skb
		* @type: new skb->pkt_type type
		* Return: 0 on success or negative error
		*/
		BPF_FUNC_skb_change_type,

		/**
		* bpf_skb_under_cgroup(skb, map, index) - Check cgroup2 membership of skb
		*
		* int bpf_skb_under_cgroup(skb, map, index)
		* Check cgroup2 membership of skb
		* @skb: pointer to skb
		* @map: pointer to bpf_map in BPF_MAP_TYPE_CGROUP_ARRAY type
		* @index: index of the cgroup in the bpf_map
		@@ -347,36 +360,133 @@ enum bpf_func_id {
		* == 0 skb failed the cgroup2 descendant test
		* == 1 skb succeeded the cgroup2 descendant test
		* < 0 error
		*/
		BPF_FUNC_skb_under_cgroup,

		/**
		* bpf_get_hash_recalc(skb)
		*
		* u32 bpf_get_hash_recalc(skb)
		* Retrieve and possibly recalculate skb->hash.
		* @skb: pointer to skb
		* Return: hash
		*/
		BPF_FUNC_get_hash_recalc,

		/**
		*
		* u64 bpf_get_current_task(void)
		* Returns current task_struct
		* Return: current
		*/
		BPF_FUNC_get_current_task,

		/**
		* bpf_probe_write_user(void dst, void src, int len)
		*
		* int bpf_probe_write_user(void dst, void src, int len)
		* safely attempt to write to a location
		* @dst: destination address in userspace
		* @src: source address on stack
		* @len: number of bytes to copy
		* Return: 0 on success or negative error
		*
		* int bpf_current_task_under_cgroup(map, index)
		* Check cgroup2 membership of current task
		* @map: pointer to bpf_map in BPF_MAP_TYPE_CGROUP_ARRAY type
		* @index: index of the cgroup in the bpf_map
		* Return:
		* == 0 current failed the cgroup2 descendant test
		* == 1 current succeeded the cgroup2 descendant test
		* < 0 error
		*
		* int bpf_skb_change_tail(skb, len, flags)
		* The helper will resize the skb to the given new size, to be used f.e.
		* with control messages.
		* @skb: pointer to skb
		* @len: new skb length
		* @flags: reserved
		* Return: 0 on success or negative error
		*
		* int bpf_skb_pull_data(skb, len)
		* The helper will pull in non-linear data in case the skb is non-linear
		* and not all of len are part of the linear section. Only needed for
		* read/write with direct packet access.
		* @skb: pointer to skb
		* @len: len to make read/writeable
		* Return: 0 on success or negative error
		*
		* s64 bpf_csum_update(skb, csum)
		* Adds csum into skb->csum in case of CHECKSUM_COMPLETE.
		* @skb: pointer to skb
		* @csum: csum to add
		* Return: csum on success or negative error
		*
		* void bpf_set_hash_invalid(skb)
		* Invalidate current skb->hash.
		* @skb: pointer to skb
		*
		* int bpf_get_numa_node_id()
		* Return: Id of current NUMA node.
		*
		* int bpf_skb_change_head()
		* Grows headroom of skb and adjusts MAC header offset accordingly.
		* Will extends/reallocae as required automatically.
		* May change skb data pointer and will thus invalidate any check
		* performed for direct packet access.
		* @skb: pointer to skb
		* @len: length of header to be pushed in front
		* @flags: Flags (unused for now)
		* Return: 0 on success or negative error
		*
		* int bpf_xdp_adjust_head(xdp_md, delta)
		* Adjust the xdp_md.data by delta
		* @xdp_md: pointer to xdp_md
		* @delta: An positive/negative integer to be added to xdp_md.data
		* Return: 0 on success or negative on error
		*/
		BPF_FUNC_probe_write_user,
		#define __BPF_FUNC_MAPPER(FN) \
		FN(unspec), \
		FN(map_lookup_elem), \
		FN(map_update_elem), \
		FN(map_delete_elem), \
		FN(probe_read), \
		FN(ktime_get_ns), \
		FN(trace_printk), \
		FN(get_prandom_u32), \
		FN(get_smp_processor_id), \
		FN(skb_store_bytes), \
		FN(l3_csum_replace), \
		FN(l4_csum_replace), \
		FN(tail_call), \
		FN(clone_redirect), \
		FN(get_current_pid_tgid), \
		FN(get_current_uid_gid), \
		FN(get_current_comm), \
		FN(get_cgroup_classid), \
		FN(skb_vlan_push), \
		FN(skb_vlan_pop), \
		FN(skb_get_tunnel_key), \
		FN(skb_set_tunnel_key), \
		FN(perf_event_read), \
		FN(redirect), \
		FN(get_route_realm), \
		FN(perf_event_output), \
		FN(skb_load_bytes), \
		FN(get_stackid), \
		FN(csum_diff), \
		FN(skb_get_tunnel_opt), \
		FN(skb_set_tunnel_opt), \
		FN(skb_change_proto), \
		FN(skb_change_type), \
		FN(skb_under_cgroup), \
		FN(get_hash_recalc), \
		FN(get_current_task), \
		FN(probe_write_user), \
		FN(current_task_under_cgroup), \
		FN(skb_change_tail), \
		FN(skb_pull_data), \
		FN(csum_update), \
		FN(set_hash_invalid), \
		FN(get_numa_node_id), \
		FN(skb_change_head), \
		FN(xdp_adjust_head),

		/* integer value in 'imm' field of BPF_CALL instruction selects which helper
		* function eBPF program intends to call
		*/
		#define __BPF_ENUM_FN(x) BPF_FUNC_ ## x
		enum bpf_func_id {
		__BPF_FUNC_MAPPER(__BPF_ENUM_FN)
		__BPF_FUNC_MAX_ID,
		};
		#undef __BPF_ENUM_FN

		/* All flags used by eBPF helper functions, placed here. */

		@@ -450,6 +560,31 @@ struct bpf_tunnel_key {
		__u32 tunnel_label;
		};

		/* Generic BPF return codes which all BPF program types may support.
		* The values are binary compatible with their TC_ACT_* counter-part to
		* provide backwards compatibility with existing SCHED_CLS and SCHED_ACT
		* programs.
		*
		* XDP is handled seprately, see XDP_*.
		*/
		enum bpf_ret_code {
		BPF_OK = 0,
		/* 1 reserved */
		BPF_DROP = 2,
		/* 3-6 reserved */
		BPF_REDIRECT = 7,
		/* >127 are reserved for prog type specific return codes */
		};

		struct bpf_sock {
		__u32 bound_dev_if;
		__u32 family;
		__u32 type;
		__u32 protocol;
		};

		#define XDP_PACKET_HEADROOM 256

		/* User return codes for XDP prog type.
		* A valid XDP program must return one of these defined values. All other
		* return codes are reserved for future use. Unknown return codes will result