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| author | Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro> | 2009-02-09 08:15:56 +0200 |
|---|---|---|
| committer | Steven Rostedt <srostedt@redhat.com> | 2009-02-09 12:24:34 -0500 |
| commit | 3c56819b14b00dd449bd776303e61f8532fad09f (patch) | |
| tree | 5a0617aa39fa441673382cf69d873b1906146e7e /kernel/trace/trace.h | |
| parent | b91facc367366b3f71375f337eb5997ec9ab4e69 (diff) | |
| download | lwn-3c56819b14b00dd449bd776303e61f8532fad09f.tar.gz lwn-3c56819b14b00dd449bd776303e61f8532fad09f.zip | |
tracing: splice support for tracing_pipe
Added and implemented tracing_pipe_fops->splice_read(). This allows
userspace programs to get tracing data more efficiently.
Signed-off-by: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Diffstat (limited to 'kernel/trace/trace.h')
| -rw-r--r-- | kernel/trace/trace.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index 7b0518adf6d7..dbff0207b213 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -353,6 +353,12 @@ struct tracer { ssize_t (*read)(struct trace_iterator *iter, struct file *filp, char __user *ubuf, size_t cnt, loff_t *ppos); + ssize_t (*splice_read)(struct trace_iterator *iter, + struct file *filp, + loff_t *ppos, + struct pipe_inode_info *pipe, + size_t len, + unsigned int flags); #ifdef CONFIG_FTRACE_STARTUP_TEST int (*selftest)(struct tracer *trace, struct trace_array *tr); |