| trace-cmd: Add blktrace_api compatibility for TC_BARRIER |
| |
| Newer kernels replace TC_BARRIER with TC_FLUSH. Ensure trace-cmd |
| can build regardless of the linux-kernel-headers version. |
| |
| Upstream-Status: Inappropriate [Stop gap] |
| |
| Signed-off-by: Darren Hart <dvhart@linux.intel.com> |
| |
| diff --git a/plugin_blk.c b/plugin_blk.c |
| index 9327b17..c8e5e1c 100644 |
| --- a/plugin_blk.c |
| +++ b/plugin_blk.c |
| @@ -44,6 +44,15 @@ struct blk_data { |
| unsigned short pdu_len; |
| }; |
| |
| +/* |
| + * Newer kernels don't define BLK_TC_BARRIER and have replaced it with |
| + * BLK_TC_FLUSH. In this case, define it here and report FLUSHES as BARRIERS as |
| + * a workaround, as described in: |
| + * http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commit;h=c09c47caedc9854d59378d6e34c989e51cfdd2b4 |
| + */ |
| +#ifndef BLK_TC_BARRIER |
| +#define BLK_TC_BARRIER 1<<2 |
| +#endif |
| static void fill_rwbs(char *rwbs, int action, unsigned int bytes) |
| { |
| int i = 0; |