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BACKPORT: f2fs: fix up f2fs_lookup tracepoints

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[ Upstream commit 70a9ac36ffd807ac506ed0b849f3e8ce3c6623f2 ]

Fix up a misuse that the filename pointer isn't always valid in
the ring buffer, and we should copy the content instead.

Fixes: 0c5e36db17 ("f2fs: trace f2fs_lookup")
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

Bug: 218970249
Link: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/include/trace/events?h=v5.10.99&id=e8bd5e33057c02d377a76a42987c083afcb43579
Change-Id: Ida688a8551a7361cd32f928f805a88b88f735884
Signed-off-by: Chun-Hung Wu <chun-hung.wu@mediatek.com>
This commit is contained in:
Chun-Hung Wu
2022-02-11 17:08:17 +08:00
committed by Todd Kjos
parent 233aba68e8
commit 8f280376b4
1 changed files with 6 additions and 6 deletions
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12
include/trace/events/f2fs.h
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@@ -807,20 +807,20 @@ TRACE_EVENT(f2fs_lookup_start,
TP_STRUCT__entry(
__field(dev_t, dev)
__field(ino_t, ino)
__field(const char *, name)
__string(name, dentry->d_name.name)
__field(unsigned int, flags)
),
TP_fast_assign(
__entry->dev = dir->i_sb->s_dev;
__entry->ino = dir->i_ino;
__entry->name = dentry->d_name.name;
__assign_str(name, dentry->d_name.name);
__entry->flags = flags;
),
TP_printk("dev = (%d,%d), pino = %lu, name:%s, flags:%u",
show_dev_ino(__entry),
__entry->name,
__get_str(name),
__entry->flags)
);
@@ -834,7 +834,7 @@ TRACE_EVENT(f2fs_lookup_end,
TP_STRUCT__entry(
__field(dev_t, dev)
__field(ino_t, ino)
__field(const char *, name)
__string(name, dentry->d_name.name)
__field(nid_t, cino)
__field(int, err)
),
@@ -842,14 +842,14 @@ TRACE_EVENT(f2fs_lookup_end,
TP_fast_assign(
__entry->dev = dir->i_sb->s_dev;
__entry->ino = dir->i_ino;
__entry->name = dentry->d_name.name;
__assign_str(name, dentry->d_name.name);
__entry->cino = ino;
__entry->err = err;
),
TP_printk("dev = (%d,%d), pino = %lu, name:%s, ino:%u, err:%d",
show_dev_ino(__entry),
__entry->name,
__get_str(name),
__entry->cino,
__entry->err)
);