ntfs3: add mount and log replay tracepoints

Add ntfs3 tracepoints for mount and log replay paths.

This adds trace events for ntfs_fill_super(), ntfs_init_from_boot(),
and log_replay() to help observe mount setup, boot sector parsing,
and $LogFile replay results.

Signed-off-by: Baolin Liu <liubaolin@kylinos.cn>
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>

4 files changed, 99 insertions, 1 deletions

diff --git a/MAINTAINERS b/MAINTAINERS
index 3a19da74d00c..596f2552dc32 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -19502,6 +19502,7 @@ W:	http://www.paragon-software.com/
 T:	git https://github.com/Paragon-Software-Group/linux-ntfs3.git
 F:	Documentation/filesystems/ntfs3.rst
 F:	fs/ntfs3/
+F:	include/trace/events/ntfs3.h
 
 NTSYNC SYNCHRONIZATION PRIMITIVE DRIVER
 M:	Elizabeth Figura <zfigura@codeweavers.com>
diff --git a/fs/ntfs3/fslog.c b/fs/ntfs3/fslog.c
index 5b7bac29b4e4..31b53c716987 100644
--- a/fs/ntfs3/fslog.c
+++ b/fs/ntfs3/fslog.c
@@ -14,6 +14,7 @@
 #include "debug.h"
 #include "ntfs.h"
 #include "ntfs_fs.h"
+#include <trace/events/ntfs3.h>
 
 /*
  * LOG FILE structs
@@ -5401,6 +5402,8 @@ out:
 	else if (log->set_dirty)
 		ntfs_set_state(sbi, NTFS_DIRTY_ERROR);
 
+	trace_ntfs3_log_replay(&ni->vfs_inode, *initialized, err);
+
 	kfree(log);
 
 	return err;
diff --git a/fs/ntfs3/super.c b/fs/ntfs3/super.c
index 0c347085cb85..b04380e4245b 100644
--- a/fs/ntfs3/super.c
+++ b/fs/ntfs3/super.c
@@ -78,6 +78,9 @@
 #include "lib/lib.h"
 #endif
 
+#define CREATE_TRACE_POINTS
+#include <trace/events/ntfs3.h>
+
 #ifdef CONFIG_PRINTK
 /*
  * ntfs_printk - Trace warnings/notices/errors.
@@ -991,7 +994,7 @@ static int ntfs_init_from_boot(struct super_block *sb, u32 sector_size,
 {
 	struct ntfs_sb_info *sbi = sb->s_fs_info;
 	int err;
-	u32 mb, gb, boot_sector_size, sct_per_clst, record_size;
+	u32 mb, gb, boot_sector_size = 0, sct_per_clst, record_size;
 	u64 sectors, clusters, mlcn, mlcn2, mft_pos, mft2_pos, dev_size0;
 	struct NTFS_BOOT *boot;
 	struct buffer_head *bh;
@@ -1264,6 +1267,8 @@ read_boot:
 	}
 
 out:
+	trace_ntfs3_init_from_boot(sb, sector_size, boot_sector_size,
+				   !!boot_block, err);
 	brelse(bh);
 
 	if (err == -EINVAL && !boot_block && dev_size0 > PAGE_SHIFT) {
@@ -1782,12 +1787,16 @@ load_root:
 	}
 
 	ntfs_create_procdir(sb);
+	trace_ntfs3_fill_super(sb, ro, sbi->cluster_size, sbi->record_size,
+			       sbi->index_size, 0);
 
 	return 0;
 
 put_inode_out:
 	iput(inode);
 out:
+	trace_ntfs3_fill_super(sb, ro, sbi->cluster_size, sbi->record_size,
+			       sbi->index_size, err);
 	/* sbi->options == options */
 	if (options) {
 		put_mount_options(sbi->options);
diff --git a/include/trace/events/ntfs3.h b/include/trace/events/ntfs3.h
new file mode 100644
index 000000000000..a45f919cb33e
--- /dev/null
+++ b/include/trace/events/ntfs3.h
@@ -0,0 +1,85 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM ntfs3
+
+#if !defined(_TRACE_NTFS3_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_NTFS3_H
+
+#include <linux/fs.h>
+#include <linux/tracepoint.h>
+
+TRACE_EVENT(ntfs3_fill_super,
+	TP_PROTO(struct super_block *sb, bool ro, u32 cluster_size,
+		 u32 record_size, u32 index_size, int err),
+	TP_ARGS(sb, ro, cluster_size, record_size, index_size, err),
+	TP_STRUCT__entry(
+		__field(dev_t, dev)
+		__field(u32, cluster_size)
+		__field(u32, record_size)
+		__field(u32, index_size)
+		__field(int, err)
+		__field(bool, ro)
+	),
+	TP_fast_assign(
+		__entry->dev = sb->s_bdev->bd_dev;
+		__entry->cluster_size = cluster_size;
+		__entry->record_size = record_size;
+		__entry->index_size = index_size;
+		__entry->err = err;
+		__entry->ro = ro;
+	),
+	TP_printk("dev=(%d,%d) ro=%d cluster=%u record=%u index=%u err=%d",
+		  MAJOR(__entry->dev), MINOR(__entry->dev), __entry->ro,
+		  __entry->cluster_size, __entry->record_size,
+		  __entry->index_size, __entry->err)
+);
+
+TRACE_EVENT(ntfs3_init_from_boot,
+	TP_PROTO(struct super_block *sb, u32 media_sector_size,
+		 u32 boot_sector_size, bool used_alt_boot, int err),
+	TP_ARGS(sb, media_sector_size, boot_sector_size, used_alt_boot, err),
+	TP_STRUCT__entry(
+		__field(dev_t, dev)
+		__field(u32, media_sector_size)
+		__field(u32, boot_sector_size)
+		__field(int, err)
+		__field(bool, used_alt_boot)
+	),
+	TP_fast_assign(
+		__entry->dev = sb->s_bdev->bd_dev;
+		__entry->media_sector_size = media_sector_size;
+		__entry->boot_sector_size = boot_sector_size;
+		__entry->err = err;
+		__entry->used_alt_boot = used_alt_boot;
+	),
+	TP_printk("dev=(%d,%d) media_sector=%u boot_sector=%u alt_boot=%d err=%d",
+		  MAJOR(__entry->dev), MINOR(__entry->dev),
+		  __entry->media_sector_size, __entry->boot_sector_size,
+		  __entry->used_alt_boot, __entry->err)
+);
+
+TRACE_EVENT(ntfs3_log_replay,
+	TP_PROTO(struct inode *inode, bool initialized, int err),
+	TP_ARGS(inode, initialized, err),
+	TP_STRUCT__entry(
+		__field(unsigned long, ino)
+		__field(loff_t, size)
+		__field(dev_t, dev)
+		__field(int, err)
+		__field(bool, initialized)
+	),
+	TP_fast_assign(
+		__entry->ino = inode->i_ino;
+		__entry->size = i_size_read(inode);
+		__entry->dev = inode->i_sb->s_dev;
+		__entry->err = err;
+		__entry->initialized = initialized;
+	),
+	TP_printk("dev=(%d,%d) ino=%lu size=%lld initialized=%d err=%d",
+		  MAJOR(__entry->dev), MINOR(__entry->dev), __entry->ino,
+		  __entry->size, __entry->initialized, __entry->err)
+);
+
+#endif /* _TRACE_NTFS3_H */
+
+#include <trace/define_trace.h>