[U-Boot] [PATCH v2 08/18] net: Refactor to protect access to the NetState variable
Joe Hershberger
joe.hershberger at ni.com
Wed Mar 28 01:42:58 CEST 2012
Changes to NetState now go through an accessor function called
net_set_state()
Signed-off-by: Joe Hershberger <joe.hershberger at ni.com>
Cc: Joe Hershberger <joe.hershberger at gmail.com>
Cc: Simon Glass <sjg at chromium.org>
Cc: Mike Frysinger <vapier at gentoo.org>
---
Changes for v2:
- net_set_state changed to static inline
- States changed to an enum
- Eliminate CamelCase in new functions.
drivers/net/netconsole.c | 6 +++---
include/net.h | 16 ++++++++++------
net/cdp.c | 2 +-
net/dns.c | 8 ++++----
net/net.c | 21 ++++++++++++---------
net/nfs.c | 8 ++++----
net/ping.c | 4 ++--
net/sntp.c | 4 ++--
net/tftp.c | 8 ++++----
9 files changed, 42 insertions(+), 35 deletions(-)
diff --git a/drivers/net/netconsole.c b/drivers/net/netconsole.c
index ba02fd7..28bb955 100644
--- a/drivers/net/netconsole.c
+++ b/drivers/net/netconsole.c
@@ -44,19 +44,19 @@ static void nc_wait_arp_handler(uchar *pkt, unsigned dest,
IPaddr_t sip, unsigned src,
unsigned len)
{
- NetState = NETLOOP_SUCCESS; /* got arp reply - quit net loop */
+ net_set_state(NETLOOP_SUCCESS); /* got arp reply - quit net loop */
}
static void nc_handler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src,
unsigned len)
{
if (input_size)
- NetState = NETLOOP_SUCCESS; /* got input - quit net loop */
+ net_set_state(NETLOOP_SUCCESS); /* got input - quit net loop */
}
static void nc_timeout(void)
{
- NetState = NETLOOP_SUCCESS;
+ net_set_state(NETLOOP_SUCCESS);
}
void NcStart(void)
diff --git a/include/net.h b/include/net.h
index f84511c..c33cd28 100644
--- a/include/net.h
+++ b/include/net.h
@@ -390,12 +390,6 @@ extern uchar NetEtherNullAddr[6];
extern ushort NetOurVLAN; /* Our VLAN */
extern ushort NetOurNativeVLAN; /* Our Native VLAN */
-extern int NetState; /* Network loop state */
-#define NETLOOP_CONTINUE 1
-#define NETLOOP_RESTART 2
-#define NETLOOP_SUCCESS 3
-#define NETLOOP_FAIL 4
-
extern int NetRestartWrap; /* Tried all network devices */
enum proto_t {
@@ -465,6 +459,16 @@ extern void NetSetHandler(rxhand_f *); /* Set RX packet handler */
extern void net_set_icmp_handler(rxhand_icmp_f *f); /* Set ICMP RX handler */
extern void NetSetTimeout(ulong, thand_f *);/* Set timeout handler */
+/* Network loop state */
+enum net_loop_state {
+ NETLOOP_CONTINUE, NETLOOP_RESTART, NETLOOP_SUCCESS, NETLOOP_FAIL
+};
+static inline void net_set_state(enum net_loop_state state)
+{
+ extern enum net_loop_state net_state;
+ net_state = state;
+}
+
/* Transmit "NetTxPacket" */
static inline void NetSendPacket(uchar *pkt, int len)
{
diff --git a/net/cdp.c b/net/cdp.c
index 34c5401..f1c1c14 100644
--- a/net/cdp.c
+++ b/net/cdp.c
@@ -234,7 +234,7 @@ CDPTimeout(void)
if (!CDPOK)
NetStartAgain();
else
- NetState = NETLOOP_SUCCESS;
+ net_set_state(NETLOOP_SUCCESS);
}
static void
diff --git a/net/dns.c b/net/dns.c
index cc7ed51..cc0aa0a 100644
--- a/net/dns.c
+++ b/net/dns.c
@@ -98,7 +98,7 @@ static void
DnsTimeout(void)
{
puts("Timeout\n");
- NetState = NETLOOP_FAIL;
+ net_set_state(NETLOOP_FAIL);
}
static void
@@ -128,7 +128,7 @@ DnsHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src, unsigned len)
/* Received 0 answers */
if (header->nanswers == 0) {
puts("DNS: host not found\n");
- NetState = NETLOOP_SUCCESS;
+ net_set_state(NETLOOP_SUCCESS);
return;
}
@@ -141,7 +141,7 @@ DnsHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src, unsigned len)
/* We sent query class 1, query type 1 */
if (&p[5] > e || get_unaligned_be16(p+1) != DNS_A_RECORD) {
puts("DNS: response was not an A record\n");
- NetState = NETLOOP_SUCCESS;
+ net_set_state(NETLOOP_SUCCESS);
return;
}
@@ -191,7 +191,7 @@ DnsHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src, unsigned len)
puts("server responded with invalid IP number\n");
}
- NetState = NETLOOP_SUCCESS;
+ net_set_state(NETLOOP_SUCCESS);
}
void
diff --git a/net/net.c b/net/net.c
index 0d14e2c..8076e5f 100644
--- a/net/net.c
+++ b/net/net.c
@@ -149,7 +149,7 @@ uchar NetEtherNullAddr[6];
void (*push_packet)(void *, int len) = 0;
#endif
/* Network loop state */
-int NetState;
+enum net_loop_state net_state;
/* Tried all network devices */
int NetRestartWrap;
/* Network loop restarted */
@@ -212,7 +212,7 @@ void net_auto_load(void)
* Just use BOOTP/RARP to configure system;
* Do not use TFTP to load the bootfile.
*/
- NetState = NETLOOP_SUCCESS;
+ net_set_state(NETLOOP_SUCCESS);
return;
}
#if defined(CONFIG_CMD_NFS)
@@ -292,7 +292,7 @@ int NetLoop(enum proto_t protocol)
restart:
memcpy(NetOurEther, eth_get_dev()->enetaddr, 6);
- NetState = NETLOOP_CONTINUE;
+ net_set_state(NETLOOP_CONTINUE);
/*
* Start the ball rolling with the given start function. From
@@ -401,7 +401,7 @@ restart:
/*
* Main packet reception loop. Loop receiving packets until
- * someone sets `NetState' to a state that terminates.
+ * someone sets `net_state' to a state that terminates.
*/
for (;;) {
WATCHDOG_RESET();
@@ -453,7 +453,7 @@ restart:
}
- switch (NetState) {
+ switch (net_state) {
case NETLOOP_RESTART:
NetRestarted = 1;
@@ -477,6 +477,9 @@ restart:
case NETLOOP_FAIL:
goto done;
+
+ case NETLOOP_CONTINUE:
+ continue;
}
}
@@ -494,7 +497,7 @@ done:
static void
startAgainTimeout(void)
{
- NetState = NETLOOP_RESTART;
+ net_set_state(NETLOOP_RESTART);
}
static void
@@ -525,7 +528,7 @@ void NetStartAgain(void)
if ((!retry_forever) && (NetTryCount >= retrycnt)) {
eth_halt();
- NetState = NETLOOP_FAIL;
+ net_set_state(NETLOOP_FAIL);
return;
}
@@ -542,10 +545,10 @@ void NetStartAgain(void)
NetSetTimeout(10000UL, startAgainTimeout);
NetSetHandler(startAgainHandler);
} else {
- NetState = NETLOOP_FAIL;
+ net_set_state(NETLOOP_FAIL);
}
} else {
- NetState = NETLOOP_RESTART;
+ net_set_state(NETLOOP_RESTART);
}
}
diff --git a/net/nfs.c b/net/nfs.c
index b6188fe..4f2041c 100644
--- a/net/nfs.c
+++ b/net/nfs.c
@@ -41,7 +41,7 @@ static int nfs_len;
static char dirfh[NFS_FHSIZE]; /* file handle of directory */
static char filefh[NFS_FHSIZE]; /* file handle of kernel image */
-static int NfsDownloadState;
+static enum net_loop_state NfsDownloadState;
static IPaddr_t NfsServerIP;
static int NfsSrvMountPort;
static int NfsSrvNfsPort;
@@ -613,10 +613,10 @@ NfsHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src, unsigned len)
case STATE_UMOUNT_REQ:
if (nfs_umountall_reply(pkt, len)) {
puts("*** ERROR: Cannot umount\n");
- NetState = NETLOOP_FAIL;
+ net_set_state(NETLOOP_FAIL);
} else {
puts("\ndone\n");
- NetState = NfsDownloadState;
+ net_set_state(NfsDownloadState);
}
break;
@@ -679,7 +679,7 @@ NfsStart(void)
nfs_path = (char *)nfs_path_buff;
if (nfs_path == NULL) {
- NetState = NETLOOP_FAIL;
+ net_set_state(NETLOOP_FAIL);
puts("*** ERROR: Fail allocate memory\n");
return;
}
diff --git a/net/ping.c b/net/ping.c
index 4896bce..6cdcdf0 100644
--- a/net/ping.c
+++ b/net/ping.c
@@ -72,7 +72,7 @@ static int ping_send(void)
static void ping_timeout(void)
{
eth_halt();
- NetState = NETLOOP_FAIL; /* we did not get the reply */
+ net_set_state(NETLOOP_FAIL); /* we did not get the reply */
}
void ping_start(void)
@@ -92,7 +92,7 @@ void ping_receive(struct Ethernet_hdr *et, struct IP_UDP_hdr *ip, int len)
case ICMP_ECHO_REPLY:
src_ip = NetReadIP((void *)&ip->ip_src);
if (src_ip == NetPingIP)
- NetState = NETLOOP_SUCCESS;
+ net_set_state(NETLOOP_SUCCESS);
return;
case ICMP_ECHO_REQUEST:
debug("Got ICMP ECHO REQUEST, return "
diff --git a/net/sntp.c b/net/sntp.c
index 7997f98..2adcc6f 100644
--- a/net/sntp.c
+++ b/net/sntp.c
@@ -45,7 +45,7 @@ static void
SntpTimeout(void)
{
puts("Timeout\n");
- NetState = NETLOOP_FAIL;
+ net_set_state(NETLOOP_FAIL);
return;
}
@@ -76,7 +76,7 @@ SntpHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src,
tm.tm_year, tm.tm_mon, tm.tm_mday,
tm.tm_hour, tm.tm_min, tm.tm_sec);
- NetState = NETLOOP_SUCCESS;
+ net_set_state(NETLOOP_SUCCESS);
}
void
diff --git a/net/tftp.c b/net/tftp.c
index a04a832..bf32eab 100644
--- a/net/tftp.c
+++ b/net/tftp.c
@@ -177,7 +177,7 @@ store_block(unsigned block, uchar *src, unsigned len)
rc = flash_write((char *)src, (ulong)(load_addr+offset), len);
if (rc) {
flash_perror(rc);
- NetState = NETLOOP_FAIL;
+ net_set_state(NETLOOP_FAIL);
return;
}
} else
@@ -300,7 +300,7 @@ static void tftp_complete(void)
}
#endif
puts("\ndone\n");
- NetState = NETLOOP_SUCCESS;
+ net_set_state(NETLOOP_SUCCESS);
}
static void
@@ -627,7 +627,7 @@ TftpHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src,
if (MasterClient && (TftpBlock >= TftpEndingBlock)) {
puts("\nMulticast tftp done\n");
mcast_cleanup();
- NetState = NETLOOP_SUCCESS;
+ net_set_state(NETLOOP_SUCCESS);
}
} else
#endif
@@ -644,7 +644,7 @@ TftpHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src,
case TFTP_ERR_ACCESS_DENIED:
puts("Not retrying...\n");
eth_halt();
- NetState = NETLOOP_FAIL;
+ net_set_state(NETLOOP_FAIL);
break;
case TFTP_ERR_UNDEFINED:
case TFTP_ERR_DISK_FULL:
--
1.6.0.2
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