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hugetlbfs: support tracepoint

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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@huawei.com>
Link: https://lore.kernel.org/r/20240829064110.67884-2-lihongbo22@huawei.com
Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Hongbo Li 2024-08-29 14:41:09 +08:00 committed by Christian Brauner
parent 6213dcc752
commit 318580ad7f
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2 changed files with 157 additions and 0 deletions
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@ -10367,6 +10367,7 @@ 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

156
include/trace/events/hugetlbfs.h Normal file
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@ -0,0 +1,156 @@
/* 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 mode 0%o size %lld nlink %u seals %u 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(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->old_size = inode->i_size;
__entry->ia_size = attr->ia_size;
),
TP_printk("dev %d,%d ino %lu name %.*s valid %#x mode 0%o old_size %lld 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->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 0%o offset %lld len %lld 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>