f2fs: add tracepoints for sync & inode operations

Add tracepoints in f2fs for tracing the syncing
operations like filesystem sync, file sync enter/exit.
It will helf to trace the code under debugging scenarios.

Also add tracepoints for tracing the various inode operations
like building inode, eviction of inode, link/unlike of
inodes.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Pankaj Kumar <pankaj.km@samsung.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
[Jaegeuk: combine and modify the tracepoint structures]
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>

1 files changed, 195 insertions, 0 deletions

diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h
new file mode 100644
index 000000000000..03bb0dbf468d
--- /dev/null
+++ b/include/trace/events/f2fs.h
@@ -0,0 +1,195 @@
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM f2fs
+
+#if !defined(_TRACE_F2FS_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_F2FS_H
+
+#include <linux/tracepoint.h>
+
+#define show_dev(entry)         MAJOR(entry->dev), MINOR(entry->dev)
+#define show_dev_ino(entry)     show_dev(entry), (unsigned long)entry->ino
+
+DECLARE_EVENT_CLASS(f2fs__inode,
+
+        TP_PROTO(struct inode *inode),
+
+        TP_ARGS(inode),
+
+        TP_STRUCT__entry(
+                __field(dev_t,  dev)
+                __field(ino_t,  ino)
+                __field(ino_t,  pino)
+                __field(umode_t, mode)
+                __field(loff_t, size)
+                __field(unsigned int, nlink)
+                __field(blkcnt_t, blocks)
+                __field(__u8,   advise)
+        ),
+
+        TP_fast_assign(
+                __entry->dev    = inode->i_sb->s_dev;
+                __entry->ino    = inode->i_ino;
+                __entry->pino   = F2FS_I(inode)->i_pino;
+                __entry->mode   = inode->i_mode;
+                __entry->nlink  = inode->i_nlink;
+                __entry->size   = inode->i_size;
+                __entry->blocks = inode->i_blocks;
+                __entry->advise = F2FS_I(inode)->i_advise;
+        ),
+
+        TP_printk("dev = (%d,%d), ino = %lu, pino = %lu, i_mode = 0x%hx, "
+                "i_size = %lld, i_nlink = %u, i_blocks = %llu, i_advise = 0x%x",
+                show_dev_ino(__entry),
+                (unsigned long)__entry->pino,
+                __entry->mode,
+                __entry->size,
+                (unsigned int)__entry->nlink,
+                (unsigned long long)__entry->blocks,
+                (unsigned char)__entry->advise)
+);
+
+DECLARE_EVENT_CLASS(f2fs__inode_exit,
+
+        TP_PROTO(struct inode *inode, int ret),
+
+        TP_ARGS(inode, ret),
+
+        TP_STRUCT__entry(
+                __field(dev_t,  dev)
+                __field(ino_t,  ino)
+                __field(int,    ret)
+        ),
+
+        TP_fast_assign(
+                __entry->dev    = inode->i_sb->s_dev;
+                __entry->ino    = inode->i_ino;
+                __entry->ret    = ret;
+        ),
+
+        TP_printk("dev = (%d,%d), ino = %lu, ret = %d",
+                show_dev_ino(__entry),
+                __entry->ret)
+);
+
+DEFINE_EVENT(f2fs__inode, f2fs_sync_file_enter,
+
+        TP_PROTO(struct inode *inode),
+
+        TP_ARGS(inode)
+);
+
+TRACE_EVENT(f2fs_sync_file_exit,
+
+        TP_PROTO(struct inode *inode, bool need_cp, int datasync, int ret),
+
+        TP_ARGS(inode, need_cp, datasync, ret),
+
+        TP_STRUCT__entry(
+                __field(dev_t,  dev)
+                __field(ino_t,  ino)
+                __field(bool,   need_cp)
+                __field(int,    datasync)
+                __field(int,    ret)
+        ),
+
+        TP_fast_assign(
+                __entry->dev            = inode->i_sb->s_dev;
+                __entry->ino            = inode->i_ino;
+                __entry->need_cp        = need_cp;
+                __entry->datasync       = datasync;
+                __entry->ret            = ret;
+        ),
+
+        TP_printk("dev = (%d,%d), ino = %lu, checkpoint is %s, "
+                "datasync = %d, ret = %d",
+                show_dev_ino(__entry),
+                __entry->need_cp ? "needed" : "not needed",
+                __entry->datasync,
+                __entry->ret)
+);
+
+TRACE_EVENT(f2fs_sync_fs,
+
+        TP_PROTO(struct super_block *sb, int wait),
+
+        TP_ARGS(sb, wait),
+
+        TP_STRUCT__entry(
+                __field(dev_t,  dev)
+                __field(int,    dirty)
+                __field(int,    wait)
+        ),
+
+        TP_fast_assign(
+                __entry->dev    = sb->s_dev;
+                __entry->dirty  = F2FS_SB(sb)->s_dirty;
+                __entry->wait   = wait;
+        ),
+
+        TP_printk("dev = (%d,%d), superblock is %s, wait = %d",
+                show_dev(__entry),
+                __entry->dirty ? "dirty" : "not dirty",
+                __entry->wait)
+);
+
+DEFINE_EVENT(f2fs__inode, f2fs_iget,
+
+        TP_PROTO(struct inode *inode),
+
+        TP_ARGS(inode)
+);
+
+DEFINE_EVENT(f2fs__inode_exit, f2fs_iget_exit,
+
+        TP_PROTO(struct inode *inode, int ret),
+
+        TP_ARGS(inode, ret)
+);
+
+DEFINE_EVENT(f2fs__inode, f2fs_evict_inode,
+
+        TP_PROTO(struct inode *inode),
+
+        TP_ARGS(inode)
+);
+
+TRACE_EVENT(f2fs_unlink_enter,
+
+        TP_PROTO(struct inode *dir, struct dentry *dentry),
+
+        TP_ARGS(dir, dentry),
+
+        TP_STRUCT__entry(
+                __field(dev_t,  dev)
+                __field(ino_t,  ino)
+                __field(loff_t, size)
+                __field(blkcnt_t, blocks)
+                __field(const char *,   name)
+        ),
+
+        TP_fast_assign(
+                __entry->dev    = dir->i_sb->s_dev;
+                __entry->ino    = dir->i_ino;
+                __entry->size   = dir->i_size;
+                __entry->blocks = dir->i_blocks;
+                __entry->name   = dentry->d_name.name;
+        ),
+
+        TP_printk("dev = (%d,%d), dir ino = %lu, i_size = %lld, "
+                "i_blocks = %llu, name = %s",
+                show_dev_ino(__entry),
+                __entry->size,
+                (unsigned long long)__entry->blocks,
+                __entry->name)
+);
+
+DEFINE_EVENT(f2fs__inode_exit, f2fs_unlink_exit,
+
+        TP_PROTO(struct inode *inode, int ret),
+
+        TP_ARGS(inode, ret)
+);
+#endif /* _TRACE_F2FS_H */
+
+ /* This part must be outside protection */
+#include <trace/define_trace.h>