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f2fs: add a tracepoint for f2fs_write_begin

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This patch adds a tracepoint for f2fs_write_begin to trace write op of user.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
This commit is contained in:
Chao Yu 2014-05-06 16:46:04 +08:00 committed by Jaegeuk Kim
parent 8b376249e7
commit 62aed044ea
2 changed files with 32 additions and 0 deletions
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2
fs/f2fs/data.c
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@ -900,6 +900,8 @@ static int f2fs_write_begin(struct file *file, struct address_space *mapping,
struct dnode_of_data dn;
int err = 0;
trace_f2fs_write_begin(inode, pos, len, flags);
f2fs_balance_fs(sbi);
repeat:
err = f2fs_convert_inline_data(inode, pos + len);

30
include/trace/events/f2fs.h
View File

@ -659,6 +659,36 @@ DEFINE_EVENT_CONDITION(f2fs__submit_bio, f2fs_submit_read_bio,
TP_CONDITION(bio)
);
TRACE_EVENT(f2fs_write_begin,
TP_PROTO(struct inode *inode, loff_t pos, unsigned int len,
unsigned int flags),
TP_ARGS(inode, pos, len, flags),
TP_STRUCT__entry(
__field(dev_t, dev)
__field(ino_t, ino)
__field(loff_t, pos)
__field(unsigned int, len)
__field(unsigned int, flags)
),
TP_fast_assign(
__entry->dev = inode->i_sb->s_dev;
__entry->ino = inode->i_ino;
__entry->pos = pos;
__entry->len = len;
__entry->flags = flags;
),
TP_printk("dev = (%d,%d), ino = %lu, pos = %llu, len = %u, flags = %u",
show_dev_ino(__entry),
(unsigned long long)__entry->pos,
__entry->len,
__entry->flags)
);
DECLARE_EVENT_CLASS(f2fs__page,
TP_PROTO(struct page *page, int type),