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oasis-root

Compiled tree of Oasis Linux based on own branch at <https://hacktivis.me/git/oasis/> git clone https://anongit.hacktivis.me/git/oasis-root.git

trace_mmap.h (1301B)

    

  1. /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
  2. #ifndef _TRACE_MMAP_H_
  3. #define _TRACE_MMAP_H_
  5. #include <linux/types.h>
  7. /**
  8.  * struct trace_buffer_meta - Ring-buffer Meta-page description
  9.  * @meta_page_size:	Size of this meta-page.
  10.  * @meta_struct_len:	Size of this structure.
  11.  * @subbuf_size:	Size of each sub-buffer.
  12.  * @nr_subbufs:		Number of subbfs in the ring-buffer, including the reader.
  13.  * @reader.lost_events:	Number of events lost at the time of the reader swap.
  14.  * @reader.id:		subbuf ID of the current reader. ID range [0 : @nr_subbufs - 1]
  15.  * @reader.read:	Number of bytes read on the reader subbuf.
  16.  * @flags:		Placeholder for now, 0 until new features are supported.
  17.  * @entries:		Number of entries in the ring-buffer.
  18.  * @overrun:		Number of entries lost in the ring-buffer.
  19.  * @read:		Number of entries that have been read.
  20.  * @Reserved1:		Internal use only.
  21.  * @Reserved2:		Internal use only.
  22.  */
  23. struct trace_buffer_meta {
  24. 	__u32		meta_page_size;
  25. 	__u32		meta_struct_len;
  27. 	__u32		subbuf_size;
  28. 	__u32		nr_subbufs;
  30. 	struct {
  31. 		__u64	lost_events;
  32. 		__u32	id;
  33. 		__u32	read;
  34. 	} reader;
  36. 	__u64	flags;
  38. 	__u64	entries;
  39. 	__u64	overrun;
  40. 	__u64	read;
  42. 	__u64	Reserved1;
  43. 	__u64	Reserved2;
  44. };
  46. #define TRACE_MMAP_IOCTL_GET_READER		_IO('R', 0x20)
  48. #endif /* _TRACE_MMAP_H_ */