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ecf5a6ce15
Add two trace points to log errors, one for vfs operations like mkdir or create, and one for I/O operations, like read, write or truncate. Also add the beginnings of a struct that is going to represent a data file and place a debugging ID in it for the tracepoints to record. Signed-off-by: David Howells <dhowells@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> cc: linux-cachefs@redhat.com Link: https://lore.kernel.org/r/163819625632.215744.17907340966178411033.stgit@warthog.procyon.org.uk/ # v1 Link: https://lore.kernel.org/r/163906926297.143852.18267924605548658911.stgit@warthog.procyon.org.uk/ # v2 Link: https://lore.kernel.org/r/163967135390.1823006.2512120406360156424.stgit@warthog.procyon.org.uk/ # v3 Link: https://lore.kernel.org/r/164021534029.640689.1875723624947577095.stgit@warthog.procyon.org.uk/ # v4
144 lines
3.9 KiB
C
144 lines
3.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/* CacheFiles tracepoints
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*
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* Copyright (C) 2021 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*/
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM cachefiles
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#if !defined(_TRACE_CACHEFILES_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_CACHEFILES_H
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#include <linux/tracepoint.h>
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/*
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* Define enums for tracing information.
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*/
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#ifndef __CACHEFILES_DECLARE_TRACE_ENUMS_ONCE_ONLY
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#define __CACHEFILES_DECLARE_TRACE_ENUMS_ONCE_ONLY
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enum cachefiles_error_trace {
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cachefiles_trace_fallocate_error,
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cachefiles_trace_getxattr_error,
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cachefiles_trace_link_error,
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cachefiles_trace_lookup_error,
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cachefiles_trace_mkdir_error,
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cachefiles_trace_notify_change_error,
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cachefiles_trace_open_error,
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cachefiles_trace_read_error,
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cachefiles_trace_remxattr_error,
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cachefiles_trace_rename_error,
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cachefiles_trace_seek_error,
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cachefiles_trace_setxattr_error,
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cachefiles_trace_statfs_error,
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cachefiles_trace_tmpfile_error,
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cachefiles_trace_trunc_error,
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cachefiles_trace_unlink_error,
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cachefiles_trace_write_error,
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};
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#endif
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/*
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* Define enum -> string mappings for display.
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*/
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#define cachefiles_error_traces \
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EM(cachefiles_trace_fallocate_error, "fallocate") \
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EM(cachefiles_trace_getxattr_error, "getxattr") \
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EM(cachefiles_trace_link_error, "link") \
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EM(cachefiles_trace_lookup_error, "lookup") \
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EM(cachefiles_trace_mkdir_error, "mkdir") \
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EM(cachefiles_trace_notify_change_error, "notify_change") \
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EM(cachefiles_trace_open_error, "open") \
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EM(cachefiles_trace_read_error, "read") \
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EM(cachefiles_trace_remxattr_error, "remxattr") \
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EM(cachefiles_trace_rename_error, "rename") \
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EM(cachefiles_trace_seek_error, "seek") \
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EM(cachefiles_trace_setxattr_error, "setxattr") \
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EM(cachefiles_trace_statfs_error, "statfs") \
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EM(cachefiles_trace_tmpfile_error, "tmpfile") \
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EM(cachefiles_trace_trunc_error, "trunc") \
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EM(cachefiles_trace_unlink_error, "unlink") \
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E_(cachefiles_trace_write_error, "write")
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/*
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* Export enum symbols via userspace.
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*/
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#undef EM
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#undef E_
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#define EM(a, b) TRACE_DEFINE_ENUM(a);
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#define E_(a, b) TRACE_DEFINE_ENUM(a);
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cachefiles_error_traces;
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/*
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* Now redefine the EM() and E_() macros to map the enums to the strings that
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* will be printed in the output.
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*/
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#undef EM
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#undef E_
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#define EM(a, b) { a, b },
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#define E_(a, b) { a, b }
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TRACE_EVENT(cachefiles_vfs_error,
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TP_PROTO(struct cachefiles_object *obj, struct inode *backer,
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int error, enum cachefiles_error_trace where),
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TP_ARGS(obj, backer, error, where),
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TP_STRUCT__entry(
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__field(unsigned int, obj )
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__field(unsigned int, backer )
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__field(enum cachefiles_error_trace, where )
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__field(short, error )
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),
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TP_fast_assign(
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__entry->obj = obj ? obj->debug_id : 0;
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__entry->backer = backer->i_ino;
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__entry->error = error;
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__entry->where = where;
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),
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TP_printk("o=%08x b=%08x %s e=%d",
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__entry->obj,
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__entry->backer,
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__print_symbolic(__entry->where, cachefiles_error_traces),
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__entry->error)
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);
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TRACE_EVENT(cachefiles_io_error,
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TP_PROTO(struct cachefiles_object *obj, struct inode *backer,
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int error, enum cachefiles_error_trace where),
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TP_ARGS(obj, backer, error, where),
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TP_STRUCT__entry(
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__field(unsigned int, obj )
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__field(unsigned int, backer )
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__field(enum cachefiles_error_trace, where )
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__field(short, error )
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),
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TP_fast_assign(
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__entry->obj = obj ? obj->debug_id : 0;
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__entry->backer = backer->i_ino;
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__entry->error = error;
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__entry->where = where;
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),
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TP_printk("o=%08x b=%08x %s e=%d",
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__entry->obj,
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__entry->backer,
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__print_symbolic(__entry->where, cachefiles_error_traces),
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__entry->error)
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);
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#endif /* _TRACE_CACHEFILES_H */
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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