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Commit 6ff204b6 authored by Chao Yu's avatar Chao Yu Committed by Jaegeuk Kim
Browse files

f2fs: trace f2fs_lookup 



This patch adds trace for f2fs_lookup.

Signed-off-by: default avatarChao Yu <yuchao0@huawei.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 0c33cb26

fs/f2fs/namei.c

+32 −17
Original line number Diff line number Diff line
@@ -323,12 +323,15 @@ static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry, 
	struct inode *inode = NULL;

	struct f2fs_dir_entry *de;

	struct page *page;

	nid_t ino;

	struct dentry *new;

	nid_t ino = -1;

	int err = 0;

	unsigned int root_ino = F2FS_ROOT_INO(F2FS_I_SB(dir));



	trace_f2fs_lookup_start(dir, dentry, flags);



	if (f2fs_encrypted_inode(dir)) {

		int res = fscrypt_get_encryption_info(dir);

		err = fscrypt_get_encryption_info(dir);



		/*

		 * DCACHE_ENCRYPTED_WITH_KEY is set if the dentry is
@@ -338,18 +341,22 @@ static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry, 
		if (fscrypt_has_encryption_key(dir))

			fscrypt_set_encrypted_dentry(dentry);

		fscrypt_set_d_op(dentry);

		if (res && res != -ENOKEY)

			return ERR_PTR(res);

		if (err && err != -ENOKEY)

			goto out;

	}



	if (dentry->d_name.len > F2FS_NAME_LEN)

		return ERR_PTR(-ENAMETOOLONG);

	if (dentry->d_name.len > F2FS_NAME_LEN) {

		err = -ENAMETOOLONG;

		goto out;

	}



	de = f2fs_find_entry(dir, &dentry->d_name, &page);

	if (!de) {

		if (IS_ERR(page))

			return (struct dentry *)page;

		return d_splice_alias(inode, dentry);

		if (IS_ERR(page)) {

			err = PTR_ERR(page);

			goto out;

		}

		goto out_splice;

	}



	ino = le32_to_cpu(de->ino);
@@ -357,19 +364,21 @@ static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry, 
	f2fs_put_page(page, 0);



	inode = f2fs_iget(dir->i_sb, ino);

	if (IS_ERR(inode))

		return ERR_CAST(inode);

	if (IS_ERR(inode)) {

		err = PTR_ERR(inode);

		goto out;

	}



	if ((dir->i_ino == root_ino) && f2fs_has_inline_dots(dir)) {

		err = __recover_dot_dentries(dir, root_ino);

		if (err)

			goto err_out;

			goto out_iput;

	}



	if (f2fs_has_inline_dots(inode)) {

		err = __recover_dot_dentries(inode, dir->i_ino);

		if (err)

			goto err_out;

			goto out_iput;

	}

	if (f2fs_encrypted_inode(dir) &&

	    (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
@@ -378,12 +387,18 @@ static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry, 
			 "Inconsistent encryption contexts: %lu/%lu",

			 dir->i_ino, inode->i_ino);

		err = -EPERM;

		goto err_out;

	}

	return d_splice_alias(inode, dentry);



err_out:

		goto out_iput;

	}

out_splice:

	new = d_splice_alias(inode, dentry);

	if (IS_ERR(new))

		err = PTR_ERR(new);

	trace_f2fs_lookup_end(dir, dentry, ino, err);

	return new;

out_iput:

	iput(inode);

out:

	trace_f2fs_lookup_end(dir, dentry, ino, err);

	return ERR_PTR(err);

}

include/trace/events/f2fs.h

+56 −0
Original line number Diff line number Diff line
@@ -679,6 +679,62 @@ TRACE_EVENT(f2fs_get_victim, 
		__entry->free)

);



TRACE_EVENT(f2fs_lookup_start,



	TP_PROTO(struct inode *dir, struct dentry *dentry, unsigned int flags),



	TP_ARGS(dir, dentry, flags),



	TP_STRUCT__entry(

		__field(dev_t,	dev)

		__field(ino_t,	ino)

		__field(const char *,	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;

		__entry->flags	= flags;

	),



	TP_printk("dev = (%d,%d), pino = %lu, name:%s, flags:%u",

		show_dev_ino(__entry),

		__entry->name,

		__entry->flags)

);



TRACE_EVENT(f2fs_lookup_end,



	TP_PROTO(struct inode *dir, struct dentry *dentry, nid_t ino,

		int err),



	TP_ARGS(dir, dentry, ino, err),



	TP_STRUCT__entry(

		__field(dev_t,	dev)

		__field(ino_t,	ino)

		__field(const char *,	name)

		__field(nid_t,	cino)

		__field(int,	err)

	),



	TP_fast_assign(

		__entry->dev	= dir->i_sb->s_dev;

		__entry->ino	= dir->i_ino;

		__entry->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,

		__entry->cino,

		__entry->err)

);



TRACE_EVENT(f2fs_fallocate,



	TP_PROTO(struct inode *inode, int mode,