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zonefs: add tracepoints for file operations

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Add tracepoints for file I/O operations to aid in debugging of I/O errors
with zonefs.

The added tracepoints are in:
- zonefs_zone_mgmt() for tracing zone management operations
- zonefs_iomap_begin() for tracing regular file I/O
- zonefs_file_dio_append() for tracing zone-append operations

Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
This commit is contained in:
Johannes Thumshirn 2021-01-27 05:21:15 +09:00 committed by Damien Le Moal
parent 6ee1d745b7
commit 62ab1aadcc
3 changed files with 113 additions and 0 deletions
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2
fs/zonefs/Makefile
View File

@ -1,4 +1,6 @@
# SPDX-License-Identifier: GPL-2.0
ccflags-y += -I$(src)
obj-$(CONFIG_ZONEFS_FS) += zonefs.o
zonefs-y := super.o

7
fs/zonefs/super.c
View File

@ -24,6 +24,9 @@
#include "zonefs.h"
#define CREATE_TRACE_POINTS
#include "trace.h"
static inline int zonefs_zone_mgmt(struct inode *inode,
enum req_opf op)
{
@ -32,6 +35,7 @@ static inline int zonefs_zone_mgmt(struct inode *inode,
lockdep_assert_held(&zi->i_truncate_mutex);
trace_zonefs_zone_mgmt(inode, op);
ret = blkdev_zone_mgmt(inode->i_sb->s_bdev, op, zi->i_zsector,
zi->i_zone_size >> SECTOR_SHIFT, GFP_NOFS);
if (ret) {
@ -100,6 +104,8 @@ static int zonefs_iomap_begin(struct inode *inode, loff_t offset, loff_t length,
iomap->bdev = inode->i_sb->s_bdev;
iomap->addr = (zi->i_zsector << SECTOR_SHIFT) + iomap->offset;
trace_zonefs_iomap_begin(inode, iomap);
return 0;
}
@ -703,6 +709,7 @@ static ssize_t zonefs_file_dio_append(struct kiocb *iocb, struct iov_iter *from)
ret = submit_bio_wait(bio);
zonefs_file_write_dio_end_io(iocb, size, ret, 0);
trace_zonefs_file_dio_append(inode, size, ret);
out_release:
bio_release_pages(bio, false);

104
fs/zonefs/trace.h Normal file
View File

@ -0,0 +1,104 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* zonefs filesystem driver tracepoints.
*
* Copyright (C) 2021 Western Digital Corporation or its affiliates.
*/
#undef TRACE_SYSTEM
#define TRACE_SYSTEM zonefs
#if !defined(_TRACE_ZONEFS_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_ZONEFS_H
#include <linux/tracepoint.h>
#include <linux/trace_seq.h>
#include <linux/blkdev.h>
#include "zonefs.h"
#define show_dev(dev) MAJOR(dev), MINOR(dev)
TRACE_EVENT(zonefs_zone_mgmt,
TP_PROTO(struct inode *inode, enum req_opf op),
TP_ARGS(inode, op),
TP_STRUCT__entry(
__field(dev_t, dev)
__field(ino_t, ino)
__field(int, op)
__field(sector_t, sector)
__field(sector_t, nr_sectors)
),
TP_fast_assign(
__entry->dev = inode->i_sb->s_dev;
__entry->ino = inode->i_ino;
__entry->op = op;
__entry->sector = ZONEFS_I(inode)->i_zsector;
__entry->nr_sectors =
ZONEFS_I(inode)->i_zone_size >> SECTOR_SHIFT;
),
TP_printk("bdev=(%d,%d), ino=%lu op=%s, sector=%llu, nr_sectors=%llu",
show_dev(__entry->dev), (unsigned long)__entry->ino,
blk_op_str(__entry->op), __entry->sector,
__entry->nr_sectors
)
);
TRACE_EVENT(zonefs_file_dio_append,
TP_PROTO(struct inode *inode, ssize_t size, ssize_t ret),
TP_ARGS(inode, size, ret),
TP_STRUCT__entry(
__field(dev_t, dev)
__field(ino_t, ino)
__field(sector_t, sector)
__field(ssize_t, size)
__field(loff_t, wpoffset)
__field(ssize_t, ret)
),
TP_fast_assign(
__entry->dev = inode->i_sb->s_dev;
__entry->ino = inode->i_ino;
__entry->sector = ZONEFS_I(inode)->i_zsector;
__entry->size = size;
__entry->wpoffset = ZONEFS_I(inode)->i_wpoffset;
__entry->ret = ret;
),
TP_printk("bdev=(%d, %d), ino=%lu, sector=%llu, size=%zu, wpoffset=%llu, ret=%zu",
show_dev(__entry->dev), (unsigned long)__entry->ino,
__entry->sector, __entry->size, __entry->wpoffset,
__entry->ret
)
);
TRACE_EVENT(zonefs_iomap_begin,
TP_PROTO(struct inode *inode, struct iomap *iomap),
TP_ARGS(inode, iomap),
TP_STRUCT__entry(
__field(dev_t, dev)
__field(ino_t, ino)
__field(u64, addr)
__field(loff_t, offset)
__field(u64, length)
),
TP_fast_assign(
__entry->dev = inode->i_sb->s_dev;
__entry->ino = inode->i_ino;
__entry->addr = iomap->addr;
__entry->offset = iomap->offset;
__entry->length = iomap->length;
),
TP_printk("bdev=(%d,%d), ino=%lu, addr=%llu, offset=%llu, length=%llu",
show_dev(__entry->dev), (unsigned long)__entry->ino,
__entry->addr, __entry->offset, __entry->length
)
);
#endif /* _TRACE_ZONEFS_H */
#undef TRACE_INCLUDE_PATH
#define TRACE_INCLUDE_PATH .
#undef TRACE_INCLUDE_FILE
#define TRACE_INCLUDE_FILE trace
/* This part must be outside protection */
#include <trace/define_trace.h>