Add basic tracepoints for {alloc, evict, free}_inode, setattr and
fallocate. These can help users to debug hugetlbfs more conveniently.
Signed-off-by: Hongbo Li <lihongbo22@xxxxxxxxxx>
---
MAINTAINERS | 1 +
include/trace/events/hugetlbfs.h | 160 +++++++++++++++++++++++++++++++
2 files changed, 161 insertions(+)
create mode 100644 include/trace/events/hugetlbfs.h
diff --git a/MAINTAINERS b/MAINTAINERS
index cd2ca0c3158e..865c48e92d40 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -10188,6 +10188,7 @@ F: Documentation/mm/hugetlbfs_reserv.rst
F: Documentation/mm/vmemmap_dedup.rst
F: fs/hugetlbfs/
F: include/linux/hugetlb.h
+F: include/trace/events/hugetlbfs.h
F: mm/hugetlb.c
F: mm/hugetlb_vmemmap.c
F: mm/hugetlb_vmemmap.h
diff --git a/include/trace/events/hugetlbfs.h b/include/trace/events/hugetlbfs.h
new file mode 100644
index 000000000000..975f584f6f51
--- /dev/null
+++ b/include/trace/events/hugetlbfs.h
@@ -0,0 +1,160 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM hugetlbfs
+
+#if !defined(_TRACE_HUGETLBFS_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_HUGETLBFS_H
+
+#include <linux/tracepoint.h>
+
+TRACE_EVENT(hugetlbfs_alloc_inode,
+
+ TP_PROTO(struct inode *inode, struct inode *dir, int mode),
+
+ TP_ARGS(inode, dir, mode),
+
+ TP_STRUCT__entry(
+ __field(dev_t, dev)
+ __field(ino_t, ino)
+ __field(ino_t, dir)
+ __field(__u16, mode)
+ ),
+
+ TP_fast_assign(
+ __entry->dev = inode->i_sb->s_dev;
+ __entry->ino = inode->i_ino;
+ __entry->dir = dir->i_ino;
+ __entry->mode = mode;
+ ),
+
+ TP_printk("dev = (%d,%d), ino = %lu, dir = %lu, mode = 0%o",
+ MAJOR(__entry->dev), MINOR(__entry->dev),
+ (unsigned long) __entry->ino,
+ (unsigned long) __entry->dir, __entry->mode)
+);
+
+DECLARE_EVENT_CLASS(hugetlbfs__inode,
+
+ TP_PROTO(struct inode *inode),
+
+ TP_ARGS(inode),
+
+ TP_STRUCT__entry(
+ __field(dev_t, dev)
+ __field(ino_t, ino)
+ __field(__u16, mode)
+ __field(loff_t, size)
+ __field(unsigned int, nlink)
+ __field(unsigned int, seals)
+ __field(blkcnt_t, blocks)
+ ),
+
+ TP_fast_assign(
+ __entry->dev = inode->i_sb->s_dev;
+ __entry->ino = inode->i_ino;
+ __entry->mode = inode->i_mode;
+ __entry->size = inode->i_size;
+ __entry->nlink = inode->i_nlink;
+ __entry->seals = HUGETLBFS_I(inode)->seals;
+ __entry->blocks = inode->i_blocks;
+ ),
+
+ TP_printk("dev = (%d,%d), ino = %lu, i_mode = 0%o, i_size = %lld, i_nlink = %u, seals = %u, i_blocks = %llu",
+ MAJOR(__entry->dev), MINOR(__entry->dev), (unsigned long) __entry->ino,
+ __entry->mode, __entry->size, __entry->nlink, __entry->seals,
+ (unsigned long long)__entry->blocks)
+);
+
+DEFINE_EVENT(hugetlbfs__inode, hugetlbfs_evict_inode,
+
+ TP_PROTO(struct inode *inode),
+
+ TP_ARGS(inode)
+);
+
+DEFINE_EVENT(hugetlbfs__inode, hugetlbfs_free_inode,
+
+ TP_PROTO(struct inode *inode),
+
+ TP_ARGS(inode)
+);
+
+TRACE_EVENT(hugetlbfs_setattr,
+
+ TP_PROTO(struct inode *inode, struct dentry *dentry,
+ struct iattr *attr),
+
+ TP_ARGS(inode, dentry, attr),
+
+ TP_STRUCT__entry(
+ __field(dev_t, dev)
+ __field(ino_t, ino)
+ __field(unsigned int, d_len)
+ __string(d_name, dentry->d_name.name)
+ __field(unsigned int, ia_valid)
+ __field(unsigned int, ia_mode)
+ __field(unsigned int, ia_uid)
+ __field(unsigned int, ia_gid)
+ __field(loff_t, old_size)
+ __field(loff_t, ia_size)
+ ),
+
+ TP_fast_assign(
+ __entry->dev = inode->i_sb->s_dev;
+ __entry->ino = inode->i_ino;
+ __entry->d_len = dentry->d_name.len;
+ __assign_str(d_name);
+ __entry->ia_valid = attr->ia_valid;
+ __entry->ia_mode = attr->ia_mode;
+ __entry->ia_uid = from_kuid_munged(current_user_ns(), attr->ia_uid);
+ __entry->ia_gid = from_kgid_munged(current_user_ns(), attr->ia_gid);
+ __entry->old_size = inode->i_size;
+ __entry->ia_size = attr->ia_size;
+ ),
+
+ TP_printk("dev = (%d,%d), ino = %lu, name = %.*s, ia_valid = %u, ia_mode = 0%o, ia_uid = %u, ia_gid = %u, old_size = %lld, ia_size = %lld",
+ MAJOR(__entry->dev), MINOR(__entry->dev), (unsigned long)__entry->ino,
+ __entry->d_len, __get_str(d_name), __entry->ia_valid, __entry->ia_mode,
+ __entry->ia_uid, __entry->ia_gid, __entry->old_size, __entry->ia_size)
+);
+
+TRACE_EVENT(hugetlbfs_fallocate,
+
+ TP_PROTO(struct inode *inode, int mode,
+ loff_t offset, loff_t len, int ret),
+
+ TP_ARGS(inode, mode, offset, len, ret),
+
+ TP_STRUCT__entry(
+ __field(dev_t, dev)
+ __field(ino_t, ino)
+ __field(int, mode)
+ __field(loff_t, offset)
+ __field(loff_t, len)
+ __field(loff_t, size)
+ __field(int, ret)
+ ),
+
+ TP_fast_assign(
+ __entry->dev = inode->i_sb->s_dev;
+ __entry->ino = inode->i_ino;
+ __entry->mode = mode;
+ __entry->offset = offset;
+ __entry->len = len;
+ __entry->size = inode->i_size;
+ __entry->ret = ret;
+ ),
+
+ TP_printk("dev = (%d,%d), ino = %lu, mode = %x, offset = %lld, len = %lld, i_size = %lld, ret = %d",
+ MAJOR(__entry->dev), MINOR(__entry->dev),
+ (unsigned long)__entry->ino, __entry->mode,
+ (unsigned long long)__entry->offset,
+ (unsigned long long)__entry->len,
+ (unsigned long long)__entry->size,
+ __entry->ret)
+);
+
+#endif /* _TRACE_HUGETLBFS_H */
+
+ /* This part must be outside protection */
+#include <trace/define_trace.h>
--
2.34.1
