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Merge remote-tracking branch 'torvalds/master' into perf/core

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To pick up fixes and get in line with other trees, powerpc kernel
mostly this time, but BPF as well.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo
2022-01-13 10:20:59 -03:00
parent c0dd94558d 455e73a07f
commit 1aa77e716c
6323 changed files with 286471 additions and 149261 deletions
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165
tools/include/uapi/linux/bpf.h
View File

@@ -1342,8 +1342,10 @@ union bpf_attr {
/* or valid module BTF object fd or 0 to attach to vmlinux */
__u32 attach_btf_obj_fd;
};
__u32 :32; /* pad */
__u32 core_relo_cnt; /* number of bpf_core_relo */
__aligned_u64 fd_array; /* array of FDs */
__aligned_u64 core_relos;
__u32 core_relo_rec_size; /* sizeof(struct bpf_core_relo) */
};
struct { /* anonymous struct used by BPF_OBJ_* commands */
@@ -1744,7 +1746,7 @@ union bpf_attr {
* if the maximum number of tail calls has been reached for this
* chain of programs. This limit is defined in the kernel by the
* macro **MAX_TAIL_CALL_CNT** (not accessible to user space),
* which is currently set to 32.
* which is currently set to 33.
* Return
* 0 on success, or a negative error in case of failure.
*
@@ -4938,6 +4940,84 @@ union bpf_attr {
* **-ENOENT** if symbol is not found.
*
* **-EPERM** if caller does not have permission to obtain kernel address.
*
* long bpf_find_vma(struct task_struct *task, u64 addr, void *callback_fn, void *callback_ctx, u64 flags)
* Description
* Find vma of *task* that contains *addr*, call *callback_fn*
* function with *task*, *vma*, and *callback_ctx*.
* The *callback_fn* should be a static function and
* the *callback_ctx* should be a pointer to the stack.
* The *flags* is used to control certain aspects of the helper.
* Currently, the *flags* must be 0.
*
* The expected callback signature is
*
* long (\*callback_fn)(struct task_struct \*task, struct vm_area_struct \*vma, void \*callback_ctx);
*
* Return
* 0 on success.
* **-ENOENT** if *task->mm* is NULL, or no vma contains *addr*.
* **-EBUSY** if failed to try lock mmap_lock.
* **-EINVAL** for invalid **flags**.
*
* long bpf_loop(u32 nr_loops, void *callback_fn, void *callback_ctx, u64 flags)
* Description
* For **nr_loops**, call **callback_fn** function
* with **callback_ctx** as the context parameter.
* The **callback_fn** should be a static function and
* the **callback_ctx** should be a pointer to the stack.
* The **flags** is used to control certain aspects of the helper.
* Currently, the **flags** must be 0. Currently, nr_loops is
* limited to 1 << 23 (~8 million) loops.
*
* long (\*callback_fn)(u32 index, void \*ctx);
*
* where **index** is the current index in the loop. The index
* is zero-indexed.
*
* If **callback_fn** returns 0, the helper will continue to the next
* loop. If return value is 1, the helper will skip the rest of
* the loops and return. Other return values are not used now,
* and will be rejected by the verifier.
*
* Return
* The number of loops performed, **-EINVAL** for invalid **flags**,
* **-E2BIG** if **nr_loops** exceeds the maximum number of loops.
*
* long bpf_strncmp(const char *s1, u32 s1_sz, const char *s2)
* Description
* Do strncmp() between **s1** and **s2**. **s1** doesn't need
* to be null-terminated and **s1_sz** is the maximum storage
* size of **s1**. **s2** must be a read-only string.
* Return
* An integer less than, equal to, or greater than zero
* if the first **s1_sz** bytes of **s1** is found to be
* less than, to match, or be greater than **s2**.
*
* long bpf_get_func_arg(void *ctx, u32 n, u64 *value)
* Description
* Get **n**-th argument (zero based) of the traced function (for tracing programs)
* returned in **value**.
*
* Return
* 0 on success.
* **-EINVAL** if n >= arguments count of traced function.
*
* long bpf_get_func_ret(void *ctx, u64 *value)
* Description
* Get return value of the traced function (for tracing programs)
* in **value**.
*
* Return
* 0 on success.
* **-EOPNOTSUPP** for tracing programs other than BPF_TRACE_FEXIT or BPF_MODIFY_RETURN.
*
* long bpf_get_func_arg_cnt(void *ctx)
* Description
* Get number of arguments of the traced function (for tracing programs).
*
* Return
* The number of arguments of the traced function.
*/
#define __BPF_FUNC_MAPPER(FN) \
FN(unspec), \
@@ -5120,6 +5200,12 @@ union bpf_attr {
FN(trace_vprintk), \
FN(skc_to_unix_sock), \
FN(kallsyms_lookup_name), \
FN(find_vma), \
FN(loop), \
FN(strncmp), \
FN(get_func_arg), \
FN(get_func_ret), \
FN(get_func_arg_cnt), \
/* */
/* integer value in 'imm' field of BPF_CALL instruction selects which helper
@@ -6296,6 +6382,7 @@ struct bpf_sk_lookup {
__u32 local_ip4; /* Network byte order */
__u32 local_ip6[4]; /* Network byte order */
__u32 local_port; /* Host byte order */
__u32 ingress_ifindex; /* The arriving interface. Determined by inet_iif. */
};
/*
@@ -6328,4 +6415,78 @@ enum {
BTF_F_ZERO = (1ULL << 3),
};
/* bpf_core_relo_kind encodes which aspect of captured field/type/enum value
* has to be adjusted by relocations. It is emitted by llvm and passed to
* libbpf and later to the kernel.
*/
enum bpf_core_relo_kind {
BPF_CORE_FIELD_BYTE_OFFSET = 0, /* field byte offset */
BPF_CORE_FIELD_BYTE_SIZE = 1, /* field size in bytes */
BPF_CORE_FIELD_EXISTS = 2, /* field existence in target kernel */
BPF_CORE_FIELD_SIGNED = 3, /* field signedness (0 - unsigned, 1 - signed) */
BPF_CORE_FIELD_LSHIFT_U64 = 4, /* bitfield-specific left bitshift */
BPF_CORE_FIELD_RSHIFT_U64 = 5, /* bitfield-specific right bitshift */
BPF_CORE_TYPE_ID_LOCAL = 6, /* type ID in local BPF object */
BPF_CORE_TYPE_ID_TARGET = 7, /* type ID in target kernel */
BPF_CORE_TYPE_EXISTS = 8, /* type existence in target kernel */
BPF_CORE_TYPE_SIZE = 9, /* type size in bytes */
BPF_CORE_ENUMVAL_EXISTS = 10, /* enum value existence in target kernel */
BPF_CORE_ENUMVAL_VALUE = 11, /* enum value integer value */
};
/*
* "struct bpf_core_relo" is used to pass relocation data form LLVM to libbpf
* and from libbpf to the kernel.
*
* CO-RE relocation captures the following data:
* - insn_off - instruction offset (in bytes) within a BPF program that needs
* its insn->imm field to be relocated with actual field info;
* - type_id - BTF type ID of the "root" (containing) entity of a relocatable
* type or field;
* - access_str_off - offset into corresponding .BTF string section. String
* interpretation depends on specific relocation kind:
* - for field-based relocations, string encodes an accessed field using
* a sequence of field and array indices, separated by colon (:). It's
* conceptually very close to LLVM's getelementptr ([0]) instruction's
* arguments for identifying offset to a field.
* - for type-based relocations, strings is expected to be just "0";
* - for enum value-based relocations, string contains an index of enum
* value within its enum type;
* - kind - one of enum bpf_core_relo_kind;
*
* Example:
* struct sample {
* int a;
* struct {
* int b[10];
* };
* };
*
* struct sample *s = ...;
* int *x = &s->a; // encoded as "0:0" (a is field #0)
* int *y = &s->b[5]; // encoded as "0:1:0:5" (anon struct is field #1,
* // b is field #0 inside anon struct, accessing elem #5)
* int *z = &s[10]->b; // encoded as "10:1" (ptr is used as an array)
*
* type_id for all relocs in this example will capture BTF type id of
* `struct sample`.
*
* Such relocation is emitted when using __builtin_preserve_access_index()
* Clang built-in, passing expression that captures field address, e.g.:
*
* bpf_probe_read(&dst, sizeof(dst),
* __builtin_preserve_access_index(&src->a.b.c));
*
* In this case Clang will emit field relocation recording necessary data to
* be able to find offset of embedded `a.b.c` field within `src` struct.
*
* [0] https://llvm.org/docs/LangRef.html#getelementptr-instruction
*/
struct bpf_core_relo {
__u32 insn_off;
__u32 type_id;
__u32 access_str_off;
enum bpf_core_relo_kind kind;
};
#endif /* _UAPI__LINUX_BPF_H__ */

3
tools/include/uapi/linux/btf.h
View File

@@ -43,7 +43,7 @@ struct btf_type {
* "size" tells the size of the type it is describing.
*
* "type" is used by PTR, TYPEDEF, VOLATILE, CONST, RESTRICT,
* FUNC, FUNC_PROTO, VAR and DECL_TAG.
* FUNC, FUNC_PROTO, VAR, DECL_TAG and TYPE_TAG.
* "type" is a type_id referring to another type.
*/
union {
@@ -75,6 +75,7 @@ enum {
BTF_KIND_DATASEC = 15, /* Section */
BTF_KIND_FLOAT = 16, /* Floating point */
BTF_KIND_DECL_TAG = 17, /* Decl Tag */
BTF_KIND_TYPE_TAG = 18, /* Type Tag */
NR_BTF_KINDS,
BTF_KIND_MAX = NR_BTF_KINDS - 1,

2
tools/include/uapi/linux/if_link.h
View File

@@ -347,6 +347,7 @@ enum {
*/
IFLA_PARENT_DEV_NAME,
IFLA_PARENT_DEV_BUS_NAME,
IFLA_GRO_MAX_SIZE,
__IFLA_MAX
};
@@ -858,6 +859,7 @@ enum {
IFLA_BOND_TLB_DYNAMIC_LB,
IFLA_BOND_PEER_NOTIF_DELAY,
IFLA_BOND_AD_LACP_ACTIVE,
IFLA_BOND_MISSED_MAX,
__IFLA_BOND_MAX,
};