mirror of
https://github.com/Fishwaldo/Star64_linux.git
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2745529ac7
Couple conflicts resolved here: 1) In the MACB driver, a bug fix to properly initialize the RX tail pointer properly overlapped with some changes to support variable sized rings. 2) In XGBE we had a "CONFIG_PM" --> "CONFIG_PM_SLEEP" fix overlapping with a reorganization of the driver to support ACPI, OF, as well as PCI variants of the chip. 3) In 'net' we had several probe error path bug fixes to the stmmac driver, meanwhile a lot of this code was cleaned up and reorganized in 'net-next'. 4) The cls_flower classifier obtained a helper function in 'net-next' called __fl_delete() and this overlapped with Daniel Borkamann's bug fix to use RCU for object destruction in 'net'. It also overlapped with Jiri's change to guard the rhashtable_remove_fast() call with a check against tc_skip_sw(). 5) In mlx4, a revert bug fix in 'net' overlapped with some unrelated changes in 'net-next'. 6) In geneve, a stale header pointer after pskb_expand_head() bug fix in 'net' overlapped with a large reorganization of the same code in 'net-next'. Since the 'net-next' code no longer had the bug in question, there was nothing to do other than to simply take the 'net-next' hunks. Signed-off-by: David S. Miller <davem@davemloft.net>
159 lines
6 KiB
C
159 lines
6 KiB
C
#ifndef __BPF_HELPERS_H
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#define __BPF_HELPERS_H
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/* helper macro to place programs, maps, license in
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* different sections in elf_bpf file. Section names
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* are interpreted by elf_bpf loader
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*/
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#define SEC(NAME) __attribute__((section(NAME), used))
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/* helper functions called from eBPF programs written in C */
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static void *(*bpf_map_lookup_elem)(void *map, void *key) =
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(void *) BPF_FUNC_map_lookup_elem;
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static int (*bpf_map_update_elem)(void *map, void *key, void *value,
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unsigned long long flags) =
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(void *) BPF_FUNC_map_update_elem;
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static int (*bpf_map_delete_elem)(void *map, void *key) =
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(void *) BPF_FUNC_map_delete_elem;
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static int (*bpf_probe_read)(void *dst, int size, void *unsafe_ptr) =
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(void *) BPF_FUNC_probe_read;
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static unsigned long long (*bpf_ktime_get_ns)(void) =
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(void *) BPF_FUNC_ktime_get_ns;
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static int (*bpf_trace_printk)(const char *fmt, int fmt_size, ...) =
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(void *) BPF_FUNC_trace_printk;
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static void (*bpf_tail_call)(void *ctx, void *map, int index) =
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(void *) BPF_FUNC_tail_call;
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static unsigned long long (*bpf_get_smp_processor_id)(void) =
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(void *) BPF_FUNC_get_smp_processor_id;
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static unsigned long long (*bpf_get_current_pid_tgid)(void) =
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(void *) BPF_FUNC_get_current_pid_tgid;
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static unsigned long long (*bpf_get_current_uid_gid)(void) =
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(void *) BPF_FUNC_get_current_uid_gid;
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static int (*bpf_get_current_comm)(void *buf, int buf_size) =
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(void *) BPF_FUNC_get_current_comm;
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static int (*bpf_perf_event_read)(void *map, int index) =
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(void *) BPF_FUNC_perf_event_read;
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static int (*bpf_clone_redirect)(void *ctx, int ifindex, int flags) =
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(void *) BPF_FUNC_clone_redirect;
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static int (*bpf_redirect)(int ifindex, int flags) =
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(void *) BPF_FUNC_redirect;
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static int (*bpf_perf_event_output)(void *ctx, void *map,
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unsigned long long flags, void *data,
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int size) =
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(void *) BPF_FUNC_perf_event_output;
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static int (*bpf_get_stackid)(void *ctx, void *map, int flags) =
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(void *) BPF_FUNC_get_stackid;
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static int (*bpf_probe_write_user)(void *dst, void *src, int size) =
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(void *) BPF_FUNC_probe_write_user;
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static int (*bpf_current_task_under_cgroup)(void *map, int index) =
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(void *) BPF_FUNC_current_task_under_cgroup;
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static int (*bpf_skb_get_tunnel_key)(void *ctx, void *key, int size, int flags) =
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(void *) BPF_FUNC_skb_get_tunnel_key;
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static int (*bpf_skb_set_tunnel_key)(void *ctx, void *key, int size, int flags) =
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(void *) BPF_FUNC_skb_set_tunnel_key;
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static int (*bpf_skb_get_tunnel_opt)(void *ctx, void *md, int size) =
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(void *) BPF_FUNC_skb_get_tunnel_opt;
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static int (*bpf_skb_set_tunnel_opt)(void *ctx, void *md, int size) =
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(void *) BPF_FUNC_skb_set_tunnel_opt;
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static unsigned long long (*bpf_get_prandom_u32)(void) =
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(void *) BPF_FUNC_get_prandom_u32;
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/* llvm builtin functions that eBPF C program may use to
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* emit BPF_LD_ABS and BPF_LD_IND instructions
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*/
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struct sk_buff;
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unsigned long long load_byte(void *skb,
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unsigned long long off) asm("llvm.bpf.load.byte");
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unsigned long long load_half(void *skb,
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unsigned long long off) asm("llvm.bpf.load.half");
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unsigned long long load_word(void *skb,
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unsigned long long off) asm("llvm.bpf.load.word");
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/* a helper structure used by eBPF C program
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* to describe map attributes to elf_bpf loader
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*/
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struct bpf_map_def {
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unsigned int type;
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unsigned int key_size;
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unsigned int value_size;
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unsigned int max_entries;
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unsigned int map_flags;
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};
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static int (*bpf_skb_load_bytes)(void *ctx, int off, void *to, int len) =
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(void *) BPF_FUNC_skb_load_bytes;
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static int (*bpf_skb_store_bytes)(void *ctx, int off, void *from, int len, int flags) =
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(void *) BPF_FUNC_skb_store_bytes;
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static int (*bpf_l3_csum_replace)(void *ctx, int off, int from, int to, int flags) =
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(void *) BPF_FUNC_l3_csum_replace;
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static int (*bpf_l4_csum_replace)(void *ctx, int off, int from, int to, int flags) =
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(void *) BPF_FUNC_l4_csum_replace;
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static int (*bpf_skb_under_cgroup)(void *ctx, void *map, int index) =
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(void *) BPF_FUNC_skb_under_cgroup;
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static int (*bpf_skb_change_head)(void *, int len, int flags) =
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(void *) BPF_FUNC_skb_change_head;
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#if defined(__x86_64__)
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#define PT_REGS_PARM1(x) ((x)->di)
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#define PT_REGS_PARM2(x) ((x)->si)
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#define PT_REGS_PARM3(x) ((x)->dx)
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#define PT_REGS_PARM4(x) ((x)->cx)
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#define PT_REGS_PARM5(x) ((x)->r8)
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#define PT_REGS_RET(x) ((x)->sp)
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#define PT_REGS_FP(x) ((x)->bp)
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#define PT_REGS_RC(x) ((x)->ax)
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#define PT_REGS_SP(x) ((x)->sp)
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#define PT_REGS_IP(x) ((x)->ip)
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#elif defined(__s390x__)
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#define PT_REGS_PARM1(x) ((x)->gprs[2])
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#define PT_REGS_PARM2(x) ((x)->gprs[3])
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#define PT_REGS_PARM3(x) ((x)->gprs[4])
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#define PT_REGS_PARM4(x) ((x)->gprs[5])
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#define PT_REGS_PARM5(x) ((x)->gprs[6])
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#define PT_REGS_RET(x) ((x)->gprs[14])
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#define PT_REGS_FP(x) ((x)->gprs[11]) /* Works only with CONFIG_FRAME_POINTER */
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#define PT_REGS_RC(x) ((x)->gprs[2])
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#define PT_REGS_SP(x) ((x)->gprs[15])
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#define PT_REGS_IP(x) ((x)->psw.addr)
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#elif defined(__aarch64__)
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#define PT_REGS_PARM1(x) ((x)->regs[0])
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#define PT_REGS_PARM2(x) ((x)->regs[1])
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#define PT_REGS_PARM3(x) ((x)->regs[2])
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#define PT_REGS_PARM4(x) ((x)->regs[3])
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#define PT_REGS_PARM5(x) ((x)->regs[4])
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#define PT_REGS_RET(x) ((x)->regs[30])
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#define PT_REGS_FP(x) ((x)->regs[29]) /* Works only with CONFIG_FRAME_POINTER */
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#define PT_REGS_RC(x) ((x)->regs[0])
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#define PT_REGS_SP(x) ((x)->sp)
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#define PT_REGS_IP(x) ((x)->pc)
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#elif defined(__powerpc__)
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#define PT_REGS_PARM1(x) ((x)->gpr[3])
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#define PT_REGS_PARM2(x) ((x)->gpr[4])
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#define PT_REGS_PARM3(x) ((x)->gpr[5])
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#define PT_REGS_PARM4(x) ((x)->gpr[6])
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#define PT_REGS_PARM5(x) ((x)->gpr[7])
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#define PT_REGS_RC(x) ((x)->gpr[3])
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#define PT_REGS_SP(x) ((x)->sp)
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#define PT_REGS_IP(x) ((x)->nip)
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#endif
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#ifdef __powerpc__
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#define BPF_KPROBE_READ_RET_IP(ip, ctx) ({ (ip) = (ctx)->link; })
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#define BPF_KRETPROBE_READ_RET_IP BPF_KPROBE_READ_RET_IP
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#else
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#define BPF_KPROBE_READ_RET_IP(ip, ctx) ({ \
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bpf_probe_read(&(ip), sizeof(ip), (void *)PT_REGS_RET(ctx)); })
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#define BPF_KRETPROBE_READ_RET_IP(ip, ctx) ({ \
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bpf_probe_read(&(ip), sizeof(ip), \
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(void *)(PT_REGS_FP(ctx) + sizeof(ip))); })
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#endif
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#endif
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