hulk inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I9DN5Z CVE: NA
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Since commit fd07e0aa23c4 ("iomap: map multiple blocks at a time"), we could map multi-blocks once a time, and the dirty_len indicates the expected map length, map_len won't large than it. The pos and dirty_len means the dirty range that should be mapped to write, add them into trace_iomap_writepage_map() could be more useful for debug.
Signed-off-by: Zhang Yi yi.zhang@huawei.com Link: https://lore.kernel.org/r/20240220115759.3445025-1-yi.zhang@huaweicloud.com Reviewed-by: Christoph Hellwig hch@lst.de Reviewed-by: Darrick J. Wong djwong@kernel.org Signed-off-by: Christian Brauner brauner@kernel.org --- fs/iomap/buffered-io.c | 2 +- fs/iomap/trace.h | 43 +++++++++++++++++++++++++++++++++++++++++- 2 files changed, 43 insertions(+), 2 deletions(-)
diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c index 7269b211b0c3..51765cace5d4 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -1773,7 +1773,7 @@ static int iomap_writepage_map_blocks(struct iomap_writepage_ctx *wpc, error = wpc->ops->map_blocks(wpc, inode, pos, dirty_len); if (error) break; - trace_iomap_writepage_map(inode, &wpc->iomap); + trace_iomap_writepage_map(inode, pos, dirty_len, &wpc->iomap);
map_len = min_t(u64, dirty_len, wpc->iomap.offset + wpc->iomap.length - pos); diff --git a/fs/iomap/trace.h b/fs/iomap/trace.h index c16fd55f5595..3ef694f9489f 100644 --- a/fs/iomap/trace.h +++ b/fs/iomap/trace.h @@ -154,7 +154,48 @@ DEFINE_EVENT(iomap_class, name, \ TP_ARGS(inode, iomap)) DEFINE_IOMAP_EVENT(iomap_iter_dstmap); DEFINE_IOMAP_EVENT(iomap_iter_srcmap); -DEFINE_IOMAP_EVENT(iomap_writepage_map); + +TRACE_EVENT(iomap_writepage_map, + 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 flags %s", + 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), + __print_flags(__entry->flags, "|", IOMAP_F_FLAGS_STRINGS)) +);
TRACE_EVENT(iomap_iter, TP_PROTO(struct iomap_iter *iter, const void *ops,