Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

Merging net into net-next to help the bpf folks avoid
some really ugly merge conflicts.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2018-04-25 23:04:22 -04:00
commit a9537c937c
12 changed files with 94 additions and 18 deletions

View File

@ -557,6 +557,14 @@ A: Although LLVM IR generation and optimization try to stay architecture
pulls in some header files containing file scope host assembly codes.
- You can add "-fno-jump-tables" to work around the switch table issue.
Otherwise, you can use bpf target.
Otherwise, you can use bpf target. Additionally, you _must_ use bpf target
when:
- Your program uses data structures with pointer or long / unsigned long
types that interface with BPF helpers or context data structures. Access
into these structures is verified by the BPF verifier and may result
in verification failures if the native architecture is not aligned with
the BPF architecture, e.g. 64-bit. An example of this is
BPF_PROG_TYPE_SK_MSG require '-target bpf'
Happy BPF hacking!

View File

@ -1027,7 +1027,17 @@ emit_cond_jmp: /* convert BPF opcode to x86 */
break;
case BPF_JMP | BPF_JA:
jmp_offset = addrs[i + insn->off] - addrs[i];
if (insn->off == -1)
/* -1 jmp instructions will always jump
* backwards two bytes. Explicitly handling
* this case avoids wasting too many passes
* when there are long sequences of replaced
* dead code.
*/
jmp_offset = -2;
else
jmp_offset = addrs[i + insn->off] - addrs[i];
if (!jmp_offset)
/* optimize out nop jumps */
break;

View File

@ -535,8 +535,17 @@ static int get_phy_id(struct mii_bus *bus, int addr, u32 *phy_id,
/* Grab the bits from PHYIR1, and put them in the upper half */
phy_reg = mdiobus_read(bus, addr, MII_PHYSID1);
if (phy_reg < 0)
if (phy_reg < 0) {
/* if there is no device, return without an error so scanning
* the bus works properly
*/
if (phy_reg == -EIO || phy_reg == -ENODEV) {
*phy_id = 0xffffffff;
return 0;
}
return -EIO;
}
*phy_id = (phy_reg & 0xffff) << 16;

View File

@ -33,6 +33,7 @@ struct bpf_map_ops {
void (*map_release)(struct bpf_map *map, struct file *map_file);
void (*map_free)(struct bpf_map *map);
int (*map_get_next_key)(struct bpf_map *map, void *key, void *next_key);
void (*map_release_uref)(struct bpf_map *map);
/* funcs callable from userspace and from eBPF programs */
void *(*map_lookup_elem)(struct bpf_map *map, void *key);
@ -365,6 +366,7 @@ int bpf_prog_array_copy(struct bpf_prog_array __rcu *old_array,
struct bpf_prog **_prog, *__prog; \
struct bpf_prog_array *_array; \
u32 _ret = 1; \
preempt_disable(); \
rcu_read_lock(); \
_array = rcu_dereference(array); \
if (unlikely(check_non_null && !_array))\
@ -376,6 +378,7 @@ int bpf_prog_array_copy(struct bpf_prog_array __rcu *old_array,
} \
_out: \
rcu_read_unlock(); \
preempt_enable_no_resched(); \
_ret; \
})
@ -448,7 +451,6 @@ int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value);
int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file,
void *key, void *value, u64 map_flags);
int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
void bpf_fd_array_map_clear(struct bpf_map *map);
int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file,
void *key, void *value, u64 map_flags);
int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);

View File

@ -526,7 +526,7 @@ static u32 prog_fd_array_sys_lookup_elem(void *ptr)
}
/* decrement refcnt of all bpf_progs that are stored in this map */
void bpf_fd_array_map_clear(struct bpf_map *map)
static void bpf_fd_array_map_clear(struct bpf_map *map)
{
struct bpf_array *array = container_of(map, struct bpf_array, map);
int i;
@ -545,6 +545,7 @@ const struct bpf_map_ops prog_array_map_ops = {
.map_fd_get_ptr = prog_fd_array_get_ptr,
.map_fd_put_ptr = prog_fd_array_put_ptr,
.map_fd_sys_lookup_elem = prog_fd_array_sys_lookup_elem,
.map_release_uref = bpf_fd_array_map_clear,
};
static struct bpf_event_entry *bpf_event_entry_gen(struct file *perf_file,

View File

@ -43,6 +43,7 @@
#include <net/tcp.h>
#include <linux/ptr_ring.h>
#include <net/inet_common.h>
#include <linux/sched/signal.h>
#define SOCK_CREATE_FLAG_MASK \
(BPF_F_NUMA_NODE | BPF_F_RDONLY | BPF_F_WRONLY)
@ -523,8 +524,6 @@ static int bpf_tcp_ingress(struct sock *sk, int apply_bytes,
i = md->sg_start;
do {
r->sg_data[i] = md->sg_data[i];
size = (apply && apply_bytes < md->sg_data[i].length) ?
apply_bytes : md->sg_data[i].length;
@ -535,6 +534,7 @@ static int bpf_tcp_ingress(struct sock *sk, int apply_bytes,
}
sk_mem_charge(sk, size);
r->sg_data[i] = md->sg_data[i];
r->sg_data[i].length = size;
md->sg_data[i].length -= size;
md->sg_data[i].offset += size;
@ -732,6 +732,26 @@ out_err:
return err;
}
static int bpf_wait_data(struct sock *sk,
struct smap_psock *psk, int flags,
long timeo, int *err)
{
int rc;
DEFINE_WAIT_FUNC(wait, woken_wake_function);
add_wait_queue(sk_sleep(sk), &wait);
sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk);
rc = sk_wait_event(sk, &timeo,
!list_empty(&psk->ingress) ||
!skb_queue_empty(&sk->sk_receive_queue),
&wait);
sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk);
remove_wait_queue(sk_sleep(sk), &wait);
return rc;
}
static int bpf_tcp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
int nonblock, int flags, int *addr_len)
{
@ -755,6 +775,7 @@ static int bpf_tcp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
return tcp_recvmsg(sk, msg, len, nonblock, flags, addr_len);
lock_sock(sk);
bytes_ready:
while (copied != len) {
struct scatterlist *sg;
struct sk_msg_buff *md;
@ -809,6 +830,28 @@ static int bpf_tcp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
}
}
if (!copied) {
long timeo;
int data;
int err = 0;
timeo = sock_rcvtimeo(sk, nonblock);
data = bpf_wait_data(sk, psock, flags, timeo, &err);
if (data) {
if (!skb_queue_empty(&sk->sk_receive_queue)) {
release_sock(sk);
smap_release_sock(psock, sk);
copied = tcp_recvmsg(sk, msg, len, nonblock, flags, addr_len);
return copied;
}
goto bytes_ready;
}
if (err)
copied = err;
}
release_sock(sk);
smap_release_sock(psock, sk);
return copied;
@ -1831,7 +1874,7 @@ static int sock_map_update_elem(struct bpf_map *map,
return err;
}
static void sock_map_release(struct bpf_map *map, struct file *map_file)
static void sock_map_release(struct bpf_map *map)
{
struct bpf_stab *stab = container_of(map, struct bpf_stab, map);
struct bpf_prog *orig;
@ -1855,7 +1898,7 @@ const struct bpf_map_ops sock_map_ops = {
.map_get_next_key = sock_map_get_next_key,
.map_update_elem = sock_map_update_elem,
.map_delete_elem = sock_map_delete_elem,
.map_release = sock_map_release,
.map_release_uref = sock_map_release,
};
BPF_CALL_4(bpf_sock_map_update, struct bpf_sock_ops_kern *, bpf_sock,

View File

@ -260,8 +260,8 @@ static void bpf_map_free_deferred(struct work_struct *work)
static void bpf_map_put_uref(struct bpf_map *map)
{
if (atomic_dec_and_test(&map->usercnt)) {
if (map->map_type == BPF_MAP_TYPE_PROG_ARRAY)
bpf_fd_array_map_clear(map);
if (map->ops->map_release_uref)
map->ops->map_release_uref(map);
}
}

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@ -3280,6 +3280,7 @@ BPF_CALL_4(bpf_skb_set_tunnel_key, struct sk_buff *, skb,
skb_dst_set(skb, (struct dst_entry *) md);
info = &md->u.tun_info;
memset(info, 0, sizeof(*info));
info->mode = IP_TUNNEL_INFO_TX;
info->key.tun_flags = TUNNEL_KEY | TUNNEL_CSUM | TUNNEL_NOCACHE;

View File

@ -547,7 +547,7 @@ static int rds_ib_setup_qp(struct rds_connection *conn)
rdsdebug("conn %p pd %p cq %p %p\n", conn, ic->i_pd,
ic->i_send_cq, ic->i_recv_cq);
return ret;
goto out;
sends_out:
vfree(ic->i_sends);
@ -572,6 +572,7 @@ send_cq_out:
ic->i_send_cq = NULL;
rds_ibdev_out:
rds_ib_remove_conn(rds_ibdev, conn);
out:
rds_ib_dev_put(rds_ibdev);
return ret;

View File

@ -978,10 +978,6 @@ static void smc_tcp_listen_work(struct work_struct *work)
}
out:
if (lsmc->clcsock) {
sock_release(lsmc->clcsock);
lsmc->clcsock = NULL;
}
release_sock(lsk);
sock_put(&lsmc->sk); /* sock_hold in smc_listen */
}

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@ -65,11 +65,14 @@ $(src)/*.c: verify_target_bpf
# asm/sysreg.h - inline assembly used by it is incompatible with llvm.
# But, there is no easy way to fix it, so just exclude it since it is
# useless for BPF samples.
#
# -target bpf option required with SK_MSG programs, this is to ensure
# reading 'void *' data types for data and data_end are __u64 reads.
$(obj)/%.o: $(src)/%.c
$(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(EXTRA_CFLAGS) -I$(obj) \
-D__KERNEL__ -D__ASM_SYSREG_H -Wno-unused-value -Wno-pointer-sign \
-Wno-compare-distinct-pointer-types \
-Wno-gnu-variable-sized-type-not-at-end \
-Wno-address-of-packed-member -Wno-tautological-compare \
-Wno-unknown-warning-option \
-O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf -filetype=obj -o $@
-Wno-unknown-warning-option -O2 -target bpf \
-emit-llvm -c $< -o -| $(LLC) -march=bpf -filetype=obj -o $@

View File

@ -76,6 +76,8 @@ $(OUTPUT)bpf_asm: $(OUTPUT)bpf_asm.o $(OUTPUT)bpf_exp.yacc.o $(OUTPUT)bpf_exp.le
$(QUIET_LINK)$(CC) $(CFLAGS) -o $@ $^
$(OUTPUT)bpf_exp.lex.c: $(OUTPUT)bpf_exp.yacc.c
$(OUTPUT)bpf_exp.yacc.o: $(OUTPUT)bpf_exp.yacc.c
$(OUTPUT)bpf_exp.lex.o: $(OUTPUT)bpf_exp.lex.c
clean: bpftool_clean
$(call QUIET_CLEAN, bpf-progs)