Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
49 lines
1.3 KiB
C
49 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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#ifndef _TRACE_MMAP_H_
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#define _TRACE_MMAP_H_
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#include <linux/types.h>
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/**
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* struct trace_buffer_meta - Ring-buffer Meta-page description
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* @meta_page_size: Size of this meta-page.
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* @meta_struct_len: Size of this structure.
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* @subbuf_size: Size of each sub-buffer.
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* @nr_subbufs: Number of subbfs in the ring-buffer, including the reader.
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* @reader.lost_events: Number of events lost at the time of the reader swap.
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* @reader.id: subbuf ID of the current reader. ID range [0 : @nr_subbufs - 1]
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* @reader.read: Number of bytes read on the reader subbuf.
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* @flags: Placeholder for now, 0 until new features are supported.
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* @entries: Number of entries in the ring-buffer.
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* @overrun: Number of entries lost in the ring-buffer.
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* @read: Number of entries that have been read.
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* @Reserved1: Internal use only.
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* @Reserved2: Internal use only.
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*/
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struct trace_buffer_meta {
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__u32 meta_page_size;
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__u32 meta_struct_len;
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__u32 subbuf_size;
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__u32 nr_subbufs;
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struct {
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__u64 lost_events;
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__u32 id;
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__u32 read;
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} reader;
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__u64 flags;
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__u64 entries;
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__u64 overrun;
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__u64 read;
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__u64 Reserved1;
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__u64 Reserved2;
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};
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#define TRACE_MMAP_IOCTL_GET_READER _IO('R', 0x20)
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#endif /* _TRACE_MMAP_H_ */
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