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6e335cd789
This patch adds the trace point to ext2 direct-io apis
in fs/ext2/file.c
Here is how the output looks like
a.out-467865 [006] 6758.170968: ext2_dio_write_begin: dev 7:12 ino 0xe isize 0x1000 pos 0x0 len 4096 flags DIRECT|WRITE aio 1 ret 0
a.out-467865 [006] 6758.171061: ext2_dio_write_end: dev 7:12 ino 0xe isize 0x1000 pos 0x0 len 0 flags DIRECT|WRITE aio 1 ret -529
kworker/3:153-444162 [003] 6758.171252: ext2_dio_write_endio: dev 7:12 ino 0xe isize 0x1000 pos 0x0 len 4096 flags DIRECT|WRITE aio 1 ret 0
a.out-468222 [001] 6761.628924: ext2_dio_read_begin: dev 7:12 ino 0xe isize 0x1000 pos 0x0 len 4096 flags DIRECT aio 1 ret 0
a.out-468222 [001] 6761.629063: ext2_dio_read_end: dev 7:12 ino 0xe isize 0x1000 pos 0x0 len 0 flags DIRECT aio 1 ret -529
a.out-468428 [005] 6763.937454: ext2_dio_write_begin: dev 7:12 ino 0xe isize 0x1000 pos 0x0 len 4096 flags DIRECT aio 0 ret 0
a.out-468428 [005] 6763.937829: ext2_dio_write_endio: dev 7:12 ino 0xe isize 0x1000 pos 0x0 len 4096 flags DIRECT aio 0 ret 0
a.out-468428 [005] 6763.937847: ext2_dio_write_end: dev 7:12 ino 0xe isize 0x1000 pos 0x1000 len 0 flags DIRECT aio 0 ret 4096
a.out-468609 [000] 6765.702878: ext2_dio_read_begin: dev 7:12 ino 0xe isize 0x1000 pos 0x0 len 4096 flags DIRECT aio 0 ret 0
a.out-468609 [000] 6765.703243: ext2_dio_read_end: dev 7:12 ino 0xe isize 0x1000 pos 0x1000 len 0 flags DIRECT aio 0 ret 4096
Reported-and-tested-by: Disha Goel <disgoel@linux.ibm.com>
[Need to add CFLAGS_trace for fixing unable to find trace file problem]
Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Message-Id: <b8b0897fa2b273a448d7b4ba7317357ac73c08bc.1682069716.git.ritesh.list@gmail.com>
94 lines
2.7 KiB
C
94 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 ext2
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#if !defined(_EXT2_TRACE_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _EXT2_TRACE_H
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#include <linux/tracepoint.h>
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DECLARE_EVENT_CLASS(ext2_dio_class,
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TP_PROTO(struct kiocb *iocb, struct iov_iter *iter, ssize_t ret),
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TP_ARGS(iocb, iter, ret),
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TP_STRUCT__entry(
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__field(dev_t, dev)
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__field(ino_t, ino)
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__field(loff_t, isize)
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__field(loff_t, pos)
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__field(size_t, count)
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__field(int, ki_flags)
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__field(bool, aio)
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__field(ssize_t, ret)
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),
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TP_fast_assign(
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__entry->dev = file_inode(iocb->ki_filp)->i_sb->s_dev;
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__entry->ino = file_inode(iocb->ki_filp)->i_ino;
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__entry->isize = file_inode(iocb->ki_filp)->i_size;
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__entry->pos = iocb->ki_pos;
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__entry->count = iov_iter_count(iter);
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__entry->ki_flags = iocb->ki_flags;
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__entry->aio = !is_sync_kiocb(iocb);
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__entry->ret = ret;
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),
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TP_printk("dev %d:%d ino 0x%lx isize 0x%llx pos 0x%llx len %zu flags %s aio %d ret %zd",
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MAJOR(__entry->dev), MINOR(__entry->dev),
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__entry->ino,
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__entry->isize,
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__entry->pos,
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__entry->count,
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__print_flags(__entry->ki_flags, "|", TRACE_IOCB_STRINGS),
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__entry->aio,
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__entry->ret)
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);
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#define DEFINE_DIO_RW_EVENT(name) \
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DEFINE_EVENT(ext2_dio_class, name, \
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TP_PROTO(struct kiocb *iocb, struct iov_iter *iter, ssize_t ret), \
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TP_ARGS(iocb, iter, ret))
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DEFINE_DIO_RW_EVENT(ext2_dio_write_begin);
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DEFINE_DIO_RW_EVENT(ext2_dio_write_end);
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DEFINE_DIO_RW_EVENT(ext2_dio_write_buff_end);
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DEFINE_DIO_RW_EVENT(ext2_dio_read_begin);
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DEFINE_DIO_RW_EVENT(ext2_dio_read_end);
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TRACE_EVENT(ext2_dio_write_endio,
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TP_PROTO(struct kiocb *iocb, ssize_t size, int ret),
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TP_ARGS(iocb, size, ret),
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TP_STRUCT__entry(
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__field(dev_t, dev)
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__field(ino_t, ino)
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__field(loff_t, isize)
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__field(loff_t, pos)
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__field(ssize_t, size)
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__field(int, ki_flags)
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__field(bool, aio)
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__field(int, ret)
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),
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TP_fast_assign(
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__entry->dev = file_inode(iocb->ki_filp)->i_sb->s_dev;
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__entry->ino = file_inode(iocb->ki_filp)->i_ino;
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__entry->isize = file_inode(iocb->ki_filp)->i_size;
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__entry->pos = iocb->ki_pos;
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__entry->size = size;
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__entry->ki_flags = iocb->ki_flags;
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__entry->aio = !is_sync_kiocb(iocb);
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__entry->ret = ret;
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),
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TP_printk("dev %d:%d ino 0x%lx isize 0x%llx pos 0x%llx len %zd flags %s aio %d ret %d",
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MAJOR(__entry->dev), MINOR(__entry->dev),
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__entry->ino,
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__entry->isize,
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__entry->pos,
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__entry->size,
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__print_flags(__entry->ki_flags, "|", TRACE_IOCB_STRINGS),
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__entry->aio,
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__entry->ret)
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);
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#endif /* _EXT2_TRACE_H */
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#undef TRACE_INCLUDE_PATH
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#define TRACE_INCLUDE_PATH .
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#define TRACE_INCLUDE_FILE trace
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#include <trace/define_trace.h>
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