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Commit 1ca42382 authored by Trond Myklebust's avatar Trond Myklebust
Browse files

NFS: Add tracepoints for debugging directory changes 



Add tracepoints for mknod, mkdir, rmdir, remove (unlink) and symlink.

Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent 8b0ad3d4

fs/nfs/dir.c

+14 −1
Original line number Diff line number Diff line
@@ -1642,7 +1642,9 @@ nfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev) 
	attr.ia_mode = mode;

	attr.ia_valid = ATTR_MODE;



	trace_nfs_mknod_enter(dir, dentry);

	status = NFS_PROTO(dir)->mknod(dir, dentry, &attr, rdev);

	trace_nfs_mknod_exit(dir, dentry, status);

	if (status != 0)

		goto out_err;

	return 0;
@@ -1666,7 +1668,9 @@ int nfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) 
	attr.ia_valid = ATTR_MODE;

	attr.ia_mode = mode | S_IFDIR;



	trace_nfs_mkdir_enter(dir, dentry);

	error = NFS_PROTO(dir)->mkdir(dir, dentry, &attr);

	trace_nfs_mkdir_exit(dir, dentry, error);

	if (error != 0)

		goto out_err;

	return 0;
@@ -1689,12 +1693,14 @@ int nfs_rmdir(struct inode *dir, struct dentry *dentry) 
	dfprintk(VFS, "NFS: rmdir(%s/%ld), %s\n",

			dir->i_sb->s_id, dir->i_ino, dentry->d_name.name);



	trace_nfs_rmdir_enter(dir, dentry);

	error = NFS_PROTO(dir)->rmdir(dir, &dentry->d_name);

	/* Ensure the VFS deletes this inode */

	if (error == 0 && dentry->d_inode != NULL)

		clear_nlink(dentry->d_inode);

	else if (error == -ENOENT)

		nfs_dentry_handle_enoent(dentry);

	trace_nfs_rmdir_exit(dir, dentry, error);



	return error;

}
@@ -1722,6 +1728,7 @@ static int nfs_safe_remove(struct dentry *dentry) 
		goto out;

	}



	trace_nfs_remove_enter(dir, dentry);

	if (inode != NULL) {

		NFS_PROTO(inode)->return_delegation(inode);

		error = NFS_PROTO(dir)->remove(dir, &dentry->d_name);
@@ -1731,6 +1738,7 @@ static int nfs_safe_remove(struct dentry *dentry) 
		error = NFS_PROTO(dir)->remove(dir, &dentry->d_name);

	if (error == -ENOENT)

		nfs_dentry_handle_enoent(dentry);

	trace_nfs_remove_exit(dir, dentry, error);

out:

	return error;

}
@@ -1748,13 +1756,14 @@ int nfs_unlink(struct inode *dir, struct dentry *dentry) 
	dfprintk(VFS, "NFS: unlink(%s/%ld, %s)\n", dir->i_sb->s_id,

		dir->i_ino, dentry->d_name.name);



	trace_nfs_unlink_enter(dir, dentry);

	spin_lock(&dentry->d_lock);

	if (d_count(dentry) > 1) {

		spin_unlock(&dentry->d_lock);

		/* Start asynchronous writeout of the inode */

		write_inode_now(dentry->d_inode, 0);

		error = nfs_sillyrename(dir, dentry);

		return error;

		goto out;

	}

	if (!d_unhashed(dentry)) {

		__d_drop(dentry);
@@ -1766,6 +1775,8 @@ int nfs_unlink(struct inode *dir, struct dentry *dentry) 
		nfs_set_verifier(dentry, nfs_save_change_attribute(dir));

	} else if (need_rehash)

		d_rehash(dentry);

out:

	trace_nfs_unlink_exit(dir, dentry, error);

	return error;

}

EXPORT_SYMBOL_GPL(nfs_unlink);
@@ -1812,7 +1823,9 @@ int nfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) 
		memset(kaddr + pathlen, 0, PAGE_SIZE - pathlen);

	kunmap_atomic(kaddr);



	trace_nfs_symlink_enter(dir, dentry);

	error = NFS_PROTO(dir)->symlink(dir, dentry, page, pathlen, &attr);

	trace_nfs_symlink_exit(dir, dentry, error);

	if (error != 0) {

		dfprintk(VFS, "NFS: symlink(%s/%ld, %s, %s) error %d\n",

			dir->i_sb->s_id, dir->i_ino,

fs/nfs/nfstrace.h

+90 −0
Original line number Diff line number Diff line
@@ -422,6 +422,96 @@ TRACE_EVENT(nfs_create_exit, 
		)

);



DECLARE_EVENT_CLASS(nfs_directory_event,

		TP_PROTO(

			const struct inode *dir,

			const struct dentry *dentry

		),



		TP_ARGS(dir, dentry),



		TP_STRUCT__entry(

			__field(dev_t, dev)

			__field(u64, dir)

			__string(name, dentry->d_name.name)

		),



		TP_fast_assign(

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

			__entry->dir = NFS_FILEID(dir);

			__assign_str(name, dentry->d_name.name);

		),



		TP_printk(

			"name=%02x:%02x:%llu/%s",

			MAJOR(__entry->dev), MINOR(__entry->dev),

			(unsigned long long)__entry->dir,

			__get_str(name)

		)

);



#define DEFINE_NFS_DIRECTORY_EVENT(name) \

	DEFINE_EVENT(nfs_directory_event, name, \

			TP_PROTO( \

				const struct inode *dir, \

				const struct dentry *dentry \

			), \

			TP_ARGS(dir, dentry))



DECLARE_EVENT_CLASS(nfs_directory_event_done,

		TP_PROTO(

			const struct inode *dir,

			const struct dentry *dentry,

			int error

		),



		TP_ARGS(dir, dentry, error),



		TP_STRUCT__entry(

			__field(int, error)

			__field(dev_t, dev)

			__field(u64, dir)

			__string(name, dentry->d_name.name)

		),



		TP_fast_assign(

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

			__entry->dir = NFS_FILEID(dir);

			__entry->error = error;

			__assign_str(name, dentry->d_name.name);

		),



		TP_printk(

			"error=%d name=%02x:%02x:%llu/%s",

			__entry->error,

			MAJOR(__entry->dev), MINOR(__entry->dev),

			(unsigned long long)__entry->dir,

			__get_str(name)

		)

);



#define DEFINE_NFS_DIRECTORY_EVENT_DONE(name) \

	DEFINE_EVENT(nfs_directory_event_done, name, \

			TP_PROTO( \

				const struct inode *dir, \

				const struct dentry *dentry, \

				int error \

			), \

			TP_ARGS(dir, dentry, error))



DEFINE_NFS_DIRECTORY_EVENT(nfs_mknod_enter);

DEFINE_NFS_DIRECTORY_EVENT_DONE(nfs_mknod_exit);

DEFINE_NFS_DIRECTORY_EVENT(nfs_mkdir_enter);

DEFINE_NFS_DIRECTORY_EVENT_DONE(nfs_mkdir_exit);

DEFINE_NFS_DIRECTORY_EVENT(nfs_rmdir_enter);

DEFINE_NFS_DIRECTORY_EVENT_DONE(nfs_rmdir_exit);

DEFINE_NFS_DIRECTORY_EVENT(nfs_remove_enter);

DEFINE_NFS_DIRECTORY_EVENT_DONE(nfs_remove_exit);

DEFINE_NFS_DIRECTORY_EVENT(nfs_unlink_enter);

DEFINE_NFS_DIRECTORY_EVENT_DONE(nfs_unlink_exit);

DEFINE_NFS_DIRECTORY_EVENT(nfs_symlink_enter);

DEFINE_NFS_DIRECTORY_EVENT_DONE(nfs_symlink_exit);



#endif /* _TRACE_NFS_H */



#undef TRACE_INCLUDE_PATH