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| author | Tim Bingham <tbingham@akamai.com> | 2016-04-29 13:30:23 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-05-01 21:34:01 -0400 |
| commit | 2c94b53738549d81dc7464a32117d1f5112c64d3 (patch) | |
| tree | b69ad831b2db75338433fadc9e27b4380d46b859 /include | |
| parent | efe790502be85c60daa65c8aa51f05c333186e12 (diff) | |
| download | linux-2c94b53738549d81dc7464a32117d1f5112c64d3.tar.gz linux-2c94b53738549d81dc7464a32117d1f5112c64d3.tar.bz2 linux-2c94b53738549d81dc7464a32117d1f5112c64d3.zip | |
net: Implement net_dbg_ratelimited() for CONFIG_DYNAMIC_DEBUG case
Prior to commit d92cff89a0c8 ("net_dbg_ratelimited: turn into no-op
when !DEBUG") the implementation of net_dbg_ratelimited() was buggy
for both the DEBUG and CONFIG_DYNAMIC_DEBUG cases.
The bug was that net_ratelimit() was being called and, despite
returning true, nothing was being printed to the console. This
resulted in messages like the following -
"net_ratelimit: %d callbacks suppressed"
with no other output nearby.
After commit d92cff89a0c8 ("net_dbg_ratelimited: turn into no-op when
!DEBUG") the bug is fixed for the DEBUG case. However, there's no
output at all for CONFIG_DYNAMIC_DEBUG case.
This patch restores debug output (if enabled) for the
CONFIG_DYNAMIC_DEBUG case.
Add a definition of net_dbg_ratelimited() for the CONFIG_DYNAMIC_DEBUG
case. The implementation takes care to check that dynamic debugging is
enabled before calling net_ratelimit().
Fixes: d92cff89a0c8 ("net_dbg_ratelimited: turn into no-op when !DEBUG")
Signed-off-by: Tim Bingham <tbingham@akamai.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/net.h | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/include/linux/net.h b/include/linux/net.h index 49175e4ced11..f840d77c6c31 100644 --- a/include/linux/net.h +++ b/include/linux/net.h @@ -246,7 +246,15 @@ do { \ net_ratelimited_function(pr_warn, fmt, ##__VA_ARGS__) #define net_info_ratelimited(fmt, ...) \ net_ratelimited_function(pr_info, fmt, ##__VA_ARGS__) -#if defined(DEBUG) +#if defined(CONFIG_DYNAMIC_DEBUG) +#define net_dbg_ratelimited(fmt, ...) \ +do { \ + DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ + if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT) && \ + net_ratelimit()) \ + __dynamic_pr_debug(&descriptor, fmt, ##__VA_ARGS__); \ +} while (0) +#elif defined(DEBUG) #define net_dbg_ratelimited(fmt, ...) \ net_ratelimited_function(pr_debug, fmt, ##__VA_ARGS__) #else |