Re: [Qemu-devel] [qemu-s390x] [PATCH v2 2/4] pc-bios/s390-ccw/net: Update code for the latest changes in SLOF

[Christian Borntraeger]

On 06/07/2018 02:22 PM, Thomas Huth wrote:
> The ip_version information now has to be stored in the filename_ip_t
> structure, and there is now a common function called tftp_get_error_info()
> which can be used to get the error string for a TFTP error code.
> We can also get rid of some superfluous "(char *)" casts now.
> 
> Signed-off-by: Thomas Huth <address@hidden>
Acked-by: Christian Borntraeger <address@hidden>



> ---
>  pc-bios/s390-ccw/netboot.mak |  2 +-
>  pc-bios/s390-ccw/netmain.c   | 86 
> +++++++++-----------------------------------
>  2 files changed, 18 insertions(+), 70 deletions(-)
> 
> diff --git a/pc-bios/s390-ccw/netboot.mak b/pc-bios/s390-ccw/netboot.mak
> index 4f64128..a73be36 100644
> --- a/pc-bios/s390-ccw/netboot.mak
> +++ b/pc-bios/s390-ccw/netboot.mak
> @@ -34,7 +34,7 @@ STDLIB_OBJS = atoi.o atol.o strtoul.o strtol.o rand.o 
> malloc.o free.o
>  %.o : $(SLOF_DIR)/lib/libc/stdlib/%.c
>       $(call quiet-command,$(CC) $(LIBC_CFLAGS) -c -o $@ 
> $<,"CC","$(TARGET_DIR)$@")
>  
> -STDIO_OBJS = sprintf.o vfprintf.o vsnprintf.o vsprintf.o fprintf.o \
> +STDIO_OBJS = sprintf.o snprintf.o vfprintf.o vsnprintf.o vsprintf.o 
> fprintf.o \
>            printf.o putc.o puts.o putchar.o stdchnls.o fileno.o
>  %.o : $(SLOF_DIR)/lib/libc/stdio/%.c
>       $(call quiet-command,$(CC) $(LIBC_CFLAGS) -c -o $@ 
> $<,"CC","$(TARGET_DIR)$@")
> diff --git a/pc-bios/s390-ccw/netmain.c b/pc-bios/s390-ccw/netmain.c
> index 6000241..d007fb7 100644
> --- a/pc-bios/s390-ccw/netmain.c
> +++ b/pc-bios/s390-ccw/netmain.c
> @@ -47,7 +47,6 @@ IplParameterBlock iplb __attribute__((aligned(PAGE_SIZE)));
>  static char cfgbuf[2048];
>  
>  static SubChannelId net_schid = { .one = 1 };
> -static int ip_version = 4;
>  static uint64_t dest_timer;
>  
>  static uint64_t get_timer_ms(void)
> @@ -100,10 +99,10 @@ static int dhcp(struct filename_ip *fn_ip, int retries)
>              printf("\nGiving up after %d DHCP requests\n", retries);
>              return -1;
>          }
> -        ip_version = 4;
> +        fn_ip->ip_version = 4;
>          rc = dhcpv4(NULL, fn_ip);
>          if (rc == -1) {
> -            ip_version = 6;
> +            fn_ip->ip_version = 6;
>              set_ipv6_address(fn_ip->fd, 0);
>              rc = dhcpv6(NULL, fn_ip);
>              if (rc == 0) {
> @@ -137,8 +136,7 @@ static int tftp_load(filename_ip_t *fnip, void *buffer, 
> int len)
>      tftp_err_t tftp_err;
>      int rc;
>  
> -    rc = tftp(fnip, buffer, len, DEFAULT_TFTP_RETRIES, &tftp_err, 1, 1428,
> -              ip_version);
> +    rc = tftp(fnip, buffer, len, DEFAULT_TFTP_RETRIES, &tftp_err);
>  
>      if (rc < 0) {
>          /* Make sure that error messages are put into a new line */
> @@ -149,61 +147,11 @@ static int tftp_load(filename_ip_t *fnip, void *buffer, 
> int len)
>          printf("  TFTP: Received %s (%d KBytes)\n", fnip->filename, rc / 
> 1024);
>      } else if (rc > 0) {
>          printf("  TFTP: Received %s (%d Bytes)\n", fnip->filename, rc);
> -    } else if (rc == -1) {
> -        puts("unknown TFTP error");
> -    } else if (rc == -2) {
> -        printf("TFTP buffer of %d bytes is too small for %s\n",
> -            len, fnip->filename);
> -    } else if (rc == -3) {
> -        printf("file not found: %s\n", fnip->filename);
> -    } else if (rc == -4) {
> -        puts("TFTP access violation");
> -    } else if (rc == -5) {
> -        puts("illegal TFTP operation");
> -    } else if (rc == -6) {
> -        puts("unknown TFTP transfer ID");
> -    } else if (rc == -7) {
> -        puts("no such TFTP user");
> -    } else if (rc == -8) {
> -        puts("TFTP blocksize negotiation failed");
> -    } else if (rc == -9) {
> -        puts("file exceeds maximum TFTP transfer size");
> -    } else if (rc <= -10 && rc >= -15) {
> -        const char *icmp_err_str;
> -        switch (rc) {
> -        case -ICMP_NET_UNREACHABLE - 10:
> -            icmp_err_str = "net unreachable";
> -            break;
> -        case -ICMP_HOST_UNREACHABLE - 10:
> -            icmp_err_str = "host unreachable";
> -            break;
> -        case -ICMP_PROTOCOL_UNREACHABLE - 10:
> -            icmp_err_str = "protocol unreachable";
> -            break;
> -        case -ICMP_PORT_UNREACHABLE - 10:
> -            icmp_err_str = "port unreachable";
> -            break;
> -        case -ICMP_FRAGMENTATION_NEEDED - 10:
> -            icmp_err_str = "fragmentation needed and DF set";
> -            break;
> -        case -ICMP_SOURCE_ROUTE_FAILED - 10:
> -            icmp_err_str = "source route failed";
> -            break;
> -        default:
> -            icmp_err_str = " UNKNOWN";
> -            break;
> -        }
> -        printf("ICMP ERROR \"%s\"\n", icmp_err_str);
> -    } else if (rc == -40) {
> -        printf("TFTP error occurred after %d bad packets received",
> -            tftp_err.bad_tftp_packets);
> -    } else if (rc == -41) {
> -        printf("TFTP error occurred after missing %d responses",
> -            tftp_err.no_packets);
> -    } else if (rc == -42) {
> -        printf("TFTP error missing block %d, expected block was %d",
> -            tftp_err.blocks_missed,
> -            tftp_err.blocks_received);
> +    } else {
> +        const char *errstr = NULL;
> +        int ecode;
> +        tftp_get_error_info(fnip, &tftp_err, rc, &errstr, &ecode);
> +        printf("TFTP error: %s\n", errstr ? errstr : "unknown error");
>      }
>  
>      return rc;
> @@ -231,7 +179,7 @@ static int net_init(filename_ip_t *fn_ip)
>  
>      rc = dhcp(fn_ip, DEFAULT_BOOT_RETRIES);
>      if (rc >= 0) {
> -        if (ip_version == 4) {
> +        if (fn_ip->ip_version == 4) {
>              set_ipv4_address(fn_ip->own_ip);
>          }
>      } else {
> @@ -239,11 +187,11 @@ static int net_init(filename_ip_t *fn_ip)
>          return -101;
>      }
>  
> -    if (ip_version == 4) {
> +    if (fn_ip->ip_version == 4) {
>          printf("  Using IPv4 address: %d.%d.%d.%d\n",
>                (fn_ip->own_ip >> 24) & 0xFF, (fn_ip->own_ip >> 16) & 0xFF,
>                (fn_ip->own_ip >>  8) & 0xFF, fn_ip->own_ip & 0xFF);
> -    } else if (ip_version == 6) {
> +    } else if (fn_ip->ip_version == 6) {
>          char ip6_str[40];
>          ipv6_to_str(fn_ip->own_ip6.addr, ip6_str);
>          printf("  Using IPv6 address: %s\n", ip6_str);
> @@ -261,17 +209,17 @@ static int net_init(filename_ip_t *fn_ip)
>      }
>  
>      printf("  Using TFTP server: ");
> -    if (ip_version == 4) {
> +    if (fn_ip->ip_version == 4) {
>          printf("%d.%d.%d.%d\n",
>                 (fn_ip->server_ip >> 24) & 0xFF, (fn_ip->server_ip >> 16) & 
> 0xFF,
>                 (fn_ip->server_ip >>  8) & 0xFF, fn_ip->server_ip & 0xFF);
> -    } else if (ip_version == 6) {
> +    } else if (fn_ip->ip_version == 6) {
>          char ip6_str[40];
>          ipv6_to_str(fn_ip->server_ip6.addr, ip6_str);
>          printf("%s\n", ip6_str);
>      }
>  
> -    if (strlen((char *)fn_ip->filename) > 0) {
> +    if (strlen(fn_ip->filename) > 0) {
>          printf("  Bootfile name: '%s'\n", fn_ip->filename);
>      }
>  
> @@ -280,7 +228,7 @@ static int net_init(filename_ip_t *fn_ip)
>  
>  static void net_release(filename_ip_t *fn_ip)
>  {
> -    if (ip_version == 4) {
> +    if (fn_ip->ip_version == 4) {
>          dhcp_send_release(fn_ip->fd);
>      }
>  }
> @@ -322,7 +270,7 @@ static int handle_ins_cfg(filename_ip_t *fn_ip, char 
> *cfg, int cfgsize)
>              return -1;
>          }
>          *ptr = 0;
> -        strncpy((char *)fn_ip->filename, insbuf, sizeof(fn_ip->filename));
> +        strncpy(fn_ip->filename, insbuf, sizeof(fn_ip->filename));
>          destaddr = (char *)atol(ptr + 1);
>          rc = tftp_load(fn_ip, destaddr, (long)_start - (long)destaddr);
>          if (rc <= 0) {
> @@ -455,7 +403,7 @@ void main(void)
>          panic("Network initialization failed. Halting.\n");
>      }
>  
> -    fnlen = strlen((char *)fn_ip.filename);
> +    fnlen = strlen(fn_ip.filename);
>      if (fnlen > 0 && fn_ip.filename[fnlen - 1] != '/') {
>          rc = net_try_direct_tftp_load(&fn_ip);
>      }
>