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linux-cryptodev-2.6/fs/iomap/trace.h
Qu Wenruo 001397f5ef iomap: add IOMAP_DIO_FSBLOCK_ALIGNED flag 
Btrfs requires all of its bios to be fs block aligned, normally it's
totally fine but with the incoming block size larger than page size
(bs > ps) support, the requirement is no longer met for direct IOs.

Because iomap_dio_bio_iter() calls bio_iov_iter_get_pages(), only
requiring alignment to be bdev_logical_block_size().

In the real world that value is either 512 or 4K, on 4K page sized
systems it means bio_iov_iter_get_pages() can break the bio at any page
boundary, breaking btrfs' requirement for bs > ps cases.

To address this problem, introduce a new public iomap dio flag,
IOMAP_DIO_FSBLOCK_ALIGNED.

When calling __iomap_dio_rw() with that new flag, iomap_dio::flags will
inherit that new flag, and iomap_dio_bio_iter() will take fs block size
into the calculation of the alignment, and pass the alignment to
bio_iov_iter_get_pages(), respecting the fs block size requirement.

The initial user of this flag will be btrfs, which needs to calculate the
checksum for direct read and thus requires the biovec to be fs block
aligned for the incoming bs > ps support.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Pankaj Raghav <p.raghav@samsung.com>
[hch: also align pos/len, incorporate the trace flags from Darrick]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://patch.msgid.link/20251031131045.1613229-2-hch@lst.de
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-11-05 13:09:27 +01:00

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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2009-2021 Christoph Hellwig
*
* NOTE: none of these tracepoints shall be considered a stable kernel ABI
* as they can change at any time.
*
* Current conventions for printing numbers measuring specific units:
*
* offset: byte offset into a subcomponent of a file operation
* pos: file offset, in bytes
* length: length of a file operation, in bytes
* ino: inode number
*
* Numbers describing space allocations should be formatted in hexadecimal.
*/
#undef TRACE_SYSTEM
#define TRACE_SYSTEM iomap
#if !defined(_IOMAP_TRACE_H) || defined(TRACE_HEADER_MULTI_READ)
#define _IOMAP_TRACE_H
#include <linux/tracepoint.h>
struct inode;
DECLARE_EVENT_CLASS(iomap_readpage_class,
TP_PROTO(struct inode *inode, int nr_pages),
TP_ARGS(inode, nr_pages),
TP_STRUCT__entry(
__field(dev_t, dev)
__field(u64, ino)
__field(int, nr_pages)
),
TP_fast_assign(
__entry->dev = inode->i_sb->s_dev;
__entry->ino = inode->i_ino;
__entry->nr_pages = nr_pages;
),
TP_printk("dev %d:%d ino 0x%llx nr_pages %d",
MAJOR(__entry->dev), MINOR(__entry->dev),
__entry->ino,
__entry->nr_pages)
)
#define DEFINE_READPAGE_EVENT(name) \
DEFINE_EVENT(iomap_readpage_class, name, \
TP_PROTO(struct inode *inode, int nr_pages), \
TP_ARGS(inode, nr_pages))
DEFINE_READPAGE_EVENT(iomap_readpage);
DEFINE_READPAGE_EVENT(iomap_readahead);
DECLARE_EVENT_CLASS(iomap_range_class,
TP_PROTO(struct inode *inode, loff_t off, u64 len),
TP_ARGS(inode, off, len),
TP_STRUCT__entry(
__field(dev_t, dev)
__field(u64, ino)
__field(loff_t, size)
__field(loff_t, offset)
__field(u64, length)
),
TP_fast_assign(
__entry->dev = inode->i_sb->s_dev;
__entry->ino = inode->i_ino;
__entry->size = i_size_read(inode);
__entry->offset = off;
__entry->length = len;
),
TP_printk("dev %d:%d ino 0x%llx size 0x%llx offset 0x%llx length 0x%llx",
MAJOR(__entry->dev), MINOR(__entry->dev),
__entry->ino,
__entry->size,
__entry->offset,
__entry->length)
)
#define DEFINE_RANGE_EVENT(name) \
DEFINE_EVENT(iomap_range_class, name, \
TP_PROTO(struct inode *inode, loff_t off, u64 len),\
TP_ARGS(inode, off, len))
DEFINE_RANGE_EVENT(iomap_writeback_folio);
DEFINE_RANGE_EVENT(iomap_release_folio);
DEFINE_RANGE_EVENT(iomap_invalidate_folio);
DEFINE_RANGE_EVENT(iomap_dio_invalidate_fail);
DEFINE_RANGE_EVENT(iomap_dio_rw_queued);
DEFINE_RANGE_EVENT(iomap_zero_iter);
#define IOMAP_TYPE_STRINGS \
{ IOMAP_HOLE, "HOLE" }, \
{ IOMAP_DELALLOC, "DELALLOC" }, \
{ IOMAP_MAPPED, "MAPPED" }, \
{ IOMAP_UNWRITTEN, "UNWRITTEN" }, \
{ IOMAP_INLINE, "INLINE" }
#define IOMAP_FLAGS_STRINGS \
{ IOMAP_WRITE, "WRITE" }, \
{ IOMAP_ZERO, "ZERO" }, \
{ IOMAP_REPORT, "REPORT" }, \
{ IOMAP_FAULT, "FAULT" }, \
{ IOMAP_DIRECT, "DIRECT" }, \
{ IOMAP_NOWAIT, "NOWAIT" }, \
{ IOMAP_OVERWRITE_ONLY, "OVERWRITE_ONLY" }, \
{ IOMAP_UNSHARE, "UNSHARE" }, \
{ IOMAP_DAX, "DAX" }, \
{ IOMAP_ATOMIC, "ATOMIC" }, \
{ IOMAP_DONTCACHE, "DONTCACHE" }
#define IOMAP_F_FLAGS_STRINGS \
{ IOMAP_F_NEW, "NEW" }, \
{ IOMAP_F_DIRTY, "DIRTY" }, \
{ IOMAP_F_SHARED, "SHARED" }, \
{ IOMAP_F_MERGED, "MERGED" }, \
{ IOMAP_F_BUFFER_HEAD, "BH" }, \
{ IOMAP_F_XATTR, "XATTR" }, \
{ IOMAP_F_BOUNDARY, "BOUNDARY" }, \
{ IOMAP_F_ANON_WRITE, "ANON_WRITE" }, \
{ IOMAP_F_ATOMIC_BIO, "ATOMIC_BIO" }, \
{ IOMAP_F_PRIVATE, "PRIVATE" }, \
{ IOMAP_F_SIZE_CHANGED, "SIZE_CHANGED" }, \
{ IOMAP_F_STALE, "STALE" }
#define IOMAP_DIO_STRINGS \
{IOMAP_DIO_FORCE_WAIT, "DIO_FORCE_WAIT" }, \
{IOMAP_DIO_OVERWRITE_ONLY, "DIO_OVERWRITE_ONLY" }, \
{IOMAP_DIO_PARTIAL, "DIO_PARTIAL" }, \
{IOMAP_DIO_FSBLOCK_ALIGNED, "DIO_FSBLOCK_ALIGNED" }
DECLARE_EVENT_CLASS(iomap_class,
TP_PROTO(struct inode *inode, struct iomap *iomap),
TP_ARGS(inode, iomap),
TP_STRUCT__entry(
__field(dev_t, dev)
__field(u64, ino)
__field(u64, addr)
__field(loff_t, offset)
__field(u64, length)
__field(u16, type)
__field(u16, flags)
__field(dev_t, bdev)
),
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;
__entry->type = iomap->type;
__entry->flags = iomap->flags;
__entry->bdev = iomap->bdev ? iomap->bdev->bd_dev : 0;
),
TP_printk("dev %d:%d ino 0x%llx bdev %d:%d addr 0x%llx offset 0x%llx "
"length 0x%llx type %s (0x%x) flags %s (0x%x)",
MAJOR(__entry->dev), MINOR(__entry->dev),
__entry->ino,
MAJOR(__entry->bdev), MINOR(__entry->bdev),
__entry->addr,
__entry->offset,
__entry->length,
__print_symbolic(__entry->type, IOMAP_TYPE_STRINGS),
__entry->type,
__print_flags(__entry->flags, "|", IOMAP_F_FLAGS_STRINGS),
__entry->flags)
)
#define DEFINE_IOMAP_EVENT(name) \
DEFINE_EVENT(iomap_class, name, \
TP_PROTO(struct inode *inode, struct iomap *iomap), \
TP_ARGS(inode, iomap))
DEFINE_IOMAP_EVENT(iomap_iter_dstmap);
DEFINE_IOMAP_EVENT(iomap_iter_srcmap);
TRACE_EVENT(iomap_add_to_ioend,
TP_PROTO(struct inode *inode, u64 pos, unsigned int dirty_len,
struct iomap *iomap),
TP_ARGS(inode, pos, dirty_len, iomap),
TP_STRUCT__entry(
__field(dev_t, dev)
__field(u64, ino)
__field(u64, pos)
__field(u64, dirty_len)
__field(u64, addr)
__field(loff_t, offset)
__field(u64, length)
__field(u16, type)
__field(u16, flags)
__field(dev_t, bdev)
),
TP_fast_assign(
__entry->dev = inode->i_sb->s_dev;
__entry->ino = inode->i_ino;
__entry->pos = pos;
__entry->dirty_len = dirty_len;
__entry->addr = iomap->addr;
__entry->offset = iomap->offset;
__entry->length = iomap->length;
__entry->type = iomap->type;
__entry->flags = iomap->flags;
__entry->bdev = iomap->bdev ? iomap->bdev->bd_dev : 0;
),
TP_printk("dev %d:%d ino 0x%llx bdev %d:%d pos 0x%llx dirty len 0x%llx "
"addr 0x%llx offset 0x%llx length 0x%llx type %s (0x%x) flags %s (0x%x)",
MAJOR(__entry->dev), MINOR(__entry->dev),
__entry->ino,
MAJOR(__entry->bdev), MINOR(__entry->bdev),
__entry->pos,
__entry->dirty_len,
__entry->addr,
__entry->offset,
__entry->length,
__print_symbolic(__entry->type, IOMAP_TYPE_STRINGS),
__entry->type,
__print_flags(__entry->flags, "|", IOMAP_F_FLAGS_STRINGS),
__entry->flags)
);
TRACE_EVENT(iomap_iter,
TP_PROTO(struct iomap_iter *iter, const void *ops,
unsigned long caller),
TP_ARGS(iter, ops, caller),
TP_STRUCT__entry(
__field(dev_t, dev)
__field(u64, ino)
__field(loff_t, pos)
__field(u64, length)
__field(int, status)
__field(unsigned int, flags)
__field(const void *, ops)
__field(unsigned long, caller)
),
TP_fast_assign(
__entry->dev = iter->inode->i_sb->s_dev;
__entry->ino = iter->inode->i_ino;
__entry->pos = iter->pos;
__entry->length = iomap_length(iter);
__entry->status = iter->status;
__entry->flags = iter->flags;
__entry->ops = ops;
__entry->caller = caller;
),
TP_printk("dev %d:%d ino 0x%llx pos 0x%llx length 0x%llx status %d flags %s (0x%x) ops %ps caller %pS",
MAJOR(__entry->dev), MINOR(__entry->dev),
__entry->ino,
__entry->pos,
__entry->length,
__entry->status,
__print_flags(__entry->flags, "|", IOMAP_FLAGS_STRINGS),
__entry->flags,
__entry->ops,
(void *)__entry->caller)
);
TRACE_EVENT(iomap_dio_rw_begin,
TP_PROTO(struct kiocb *iocb, struct iov_iter *iter,
unsigned int dio_flags, size_t done_before),
TP_ARGS(iocb, iter, dio_flags, done_before),
TP_STRUCT__entry(
__field(dev_t, dev)
__field(ino_t, ino)
__field(loff_t, isize)
__field(loff_t, pos)
__field(size_t, count)
__field(size_t, done_before)
__field(int, ki_flags)
__field(unsigned int, dio_flags)
__field(bool, aio)
),
TP_fast_assign(
__entry->dev = file_inode(iocb->ki_filp)->i_sb->s_dev;
__entry->ino = file_inode(iocb->ki_filp)->i_ino;
__entry->isize = file_inode(iocb->ki_filp)->i_size;
__entry->pos = iocb->ki_pos;
__entry->count = iov_iter_count(iter);
__entry->done_before = done_before;
__entry->ki_flags = iocb->ki_flags;
__entry->dio_flags = dio_flags;
__entry->aio = !is_sync_kiocb(iocb);
),
TP_printk("dev %d:%d ino 0x%lx size 0x%llx offset 0x%llx length 0x%zx done_before 0x%zx flags %s dio_flags %s aio %d",
MAJOR(__entry->dev), MINOR(__entry->dev),
__entry->ino,
__entry->isize,
__entry->pos,
__entry->count,
__entry->done_before,
__print_flags(__entry->ki_flags, "|", TRACE_IOCB_STRINGS),
__print_flags(__entry->dio_flags, "|", IOMAP_DIO_STRINGS),
__entry->aio)
);
TRACE_EVENT(iomap_dio_complete,
TP_PROTO(struct kiocb *iocb, int error, ssize_t ret),
TP_ARGS(iocb, error, ret),
TP_STRUCT__entry(
__field(dev_t, dev)
__field(ino_t, ino)
__field(loff_t, isize)
__field(loff_t, pos)
__field(int, ki_flags)
__field(bool, aio)
__field(int, error)
__field(ssize_t, ret)
),
TP_fast_assign(
__entry->dev = file_inode(iocb->ki_filp)->i_sb->s_dev;
__entry->ino = file_inode(iocb->ki_filp)->i_ino;
__entry->isize = file_inode(iocb->ki_filp)->i_size;
__entry->pos = iocb->ki_pos;
__entry->ki_flags = iocb->ki_flags;
__entry->aio = !is_sync_kiocb(iocb);
__entry->error = error;
__entry->ret = ret;
),
TP_printk("dev %d:%d ino 0x%lx size 0x%llx offset 0x%llx flags %s aio %d error %d ret %zd",
MAJOR(__entry->dev), MINOR(__entry->dev),
__entry->ino,
__entry->isize,
__entry->pos,
__print_flags(__entry->ki_flags, "|", TRACE_IOCB_STRINGS),
__entry->aio,
__entry->error,
__entry->ret)
);
#endif /* _IOMAP_TRACE_H */
#undef TRACE_INCLUDE_PATH
#define TRACE_INCLUDE_PATH .
#define TRACE_INCLUDE_FILE trace
#include <trace/define_trace.h>
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