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04ae87a520
Rework event_create_dir() to use an array of static data instead of function pointers where possible. The problem is that it would call the function pointer on module load before parse_args(), possibly even before jump_labels were initialized. Luckily the generated functions don't use jump_labels but it still seems fragile. It also gets in the way of changing when we make the module map executable. The generated function are basically calling trace_define_field() with a bunch of static arguments. So instead of a function, capture these arguments in a static array, avoiding the function call. Now there are a number of cases where the fields are dynamic (syscall arguments, kprobes and uprobes), in which case a static array does not work, for these we preserve the function call. Luckily all these cases are not related to modules and so we can retain the function call for them. Also fix up all broken tracepoint definitions that now generate a compile error. Tested-by: Alexei Starovoitov <ast@kernel.org> Tested-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Acked-by: Alexei Starovoitov <ast@kernel.org> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: https://lkml.kernel.org/r/20191111132458.342979914@infradead.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
117 lines
2.7 KiB
C
117 lines
2.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM filemap
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#if !defined(_TRACE_FILEMAP_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_FILEMAP_H
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#include <linux/types.h>
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#include <linux/tracepoint.h>
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#include <linux/mm.h>
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#include <linux/memcontrol.h>
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#include <linux/device.h>
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#include <linux/kdev_t.h>
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#include <linux/errseq.h>
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DECLARE_EVENT_CLASS(mm_filemap_op_page_cache,
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TP_PROTO(struct page *page),
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TP_ARGS(page),
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TP_STRUCT__entry(
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__field(unsigned long, pfn)
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__field(unsigned long, i_ino)
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__field(unsigned long, index)
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__field(dev_t, s_dev)
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),
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TP_fast_assign(
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__entry->pfn = page_to_pfn(page);
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__entry->i_ino = page->mapping->host->i_ino;
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__entry->index = page->index;
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if (page->mapping->host->i_sb)
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__entry->s_dev = page->mapping->host->i_sb->s_dev;
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else
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__entry->s_dev = page->mapping->host->i_rdev;
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),
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TP_printk("dev %d:%d ino %lx page=%p pfn=%lu ofs=%lu",
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MAJOR(__entry->s_dev), MINOR(__entry->s_dev),
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__entry->i_ino,
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pfn_to_page(__entry->pfn),
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__entry->pfn,
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__entry->index << PAGE_SHIFT)
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);
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DEFINE_EVENT(mm_filemap_op_page_cache, mm_filemap_delete_from_page_cache,
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TP_PROTO(struct page *page),
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TP_ARGS(page)
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);
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DEFINE_EVENT(mm_filemap_op_page_cache, mm_filemap_add_to_page_cache,
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TP_PROTO(struct page *page),
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TP_ARGS(page)
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);
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TRACE_EVENT(filemap_set_wb_err,
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TP_PROTO(struct address_space *mapping, errseq_t eseq),
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TP_ARGS(mapping, eseq),
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TP_STRUCT__entry(
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__field(unsigned long, i_ino)
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__field(dev_t, s_dev)
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__field(errseq_t, errseq)
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),
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TP_fast_assign(
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__entry->i_ino = mapping->host->i_ino;
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__entry->errseq = eseq;
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if (mapping->host->i_sb)
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__entry->s_dev = mapping->host->i_sb->s_dev;
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else
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__entry->s_dev = mapping->host->i_rdev;
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),
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TP_printk("dev=%d:%d ino=0x%lx errseq=0x%x",
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MAJOR(__entry->s_dev), MINOR(__entry->s_dev),
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__entry->i_ino, __entry->errseq)
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);
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TRACE_EVENT(file_check_and_advance_wb_err,
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TP_PROTO(struct file *file, errseq_t old),
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TP_ARGS(file, old),
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TP_STRUCT__entry(
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__field(struct file *, file)
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__field(unsigned long, i_ino)
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__field(dev_t, s_dev)
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__field(errseq_t, old)
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__field(errseq_t, new)
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),
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TP_fast_assign(
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__entry->file = file;
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__entry->i_ino = file->f_mapping->host->i_ino;
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if (file->f_mapping->host->i_sb)
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__entry->s_dev =
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file->f_mapping->host->i_sb->s_dev;
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else
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__entry->s_dev =
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file->f_mapping->host->i_rdev;
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__entry->old = old;
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__entry->new = file->f_wb_err;
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),
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TP_printk("file=%p dev=%d:%d ino=0x%lx old=0x%x new=0x%x",
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__entry->file, MAJOR(__entry->s_dev),
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MINOR(__entry->s_dev), __entry->i_ino, __entry->old,
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__entry->new)
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);
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#endif /* _TRACE_FILEMAP_H */
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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