NFS: Add tracepoints for debugging NFS hard links (1fd1085b) · Commits · e / devices / android_kernel_xiaomi_sm6125

fs/nfs/dir.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -1860,6 +1860,7 @@ nfs_link(struct dentry old_dentry, struct inode dir, struct dentry *dentry)
		old_dentry->d_parent->d_name.name, old_dentry->d_name.name,
		dentry->d_parent->d_name.name, dentry->d_name.name);

		trace_nfs_link_enter(inode, dir, dentry);
		NFS_PROTO(inode)->return_delegation(inode);

		d_drop(dentry);
		@@ -1868,6 +1869,7 @@ nfs_link(struct dentry old_dentry, struct inode dir, struct dentry *dentry)
		ihold(inode);
		d_add(dentry, inode);
		}
		trace_nfs_link_exit(inode, dir, dentry, error);
		return error;
		}
		EXPORT_SYMBOL_GPL(nfs_link);

fs/nfs/nfstrace.h

+70 −0

Original line number	Diff line number	Diff line
		@@ -512,6 +512,76 @@ DEFINE_NFS_DIRECTORY_EVENT_DONE(nfs_unlink_exit);
		DEFINE_NFS_DIRECTORY_EVENT(nfs_symlink_enter);
		DEFINE_NFS_DIRECTORY_EVENT_DONE(nfs_symlink_exit);

		TRACE_EVENT(nfs_link_enter,
		TP_PROTO(
		const struct inode *inode,
		const struct inode *dir,
		const struct dentry *dentry
		),

		TP_ARGS(inode, dir, dentry),

		TP_STRUCT__entry(
		__field(dev_t, dev)
		__field(u64, fileid)
		__field(u64, dir)
		__string(name, dentry->d_name.name)
		),

		TP_fast_assign(
		__entry->dev = inode->i_sb->s_dev;
		__entry->fileid = NFS_FILEID(inode);
		__entry->dir = NFS_FILEID(dir);
		__assign_str(name, dentry->d_name.name);
		),

		TP_printk(
		"fileid=%02x:%02x:%llu name=%02x:%02x:%llu/%s",
		MAJOR(__entry->dev), MINOR(__entry->dev),
		__entry->fileid,
		MAJOR(__entry->dev), MINOR(__entry->dev),
		(unsigned long long)__entry->dir,
		__get_str(name)
		)
		);

		TRACE_EVENT(nfs_link_exit,
		TP_PROTO(
		const struct inode *inode,
		const struct inode *dir,
		const struct dentry *dentry,
		int error
		),

		TP_ARGS(inode, dir, dentry, error),

		TP_STRUCT__entry(
		__field(int, error)
		__field(dev_t, dev)
		__field(u64, fileid)
		__field(u64, dir)
		__string(name, dentry->d_name.name)
		),

		TP_fast_assign(
		__entry->dev = inode->i_sb->s_dev;
		__entry->fileid = NFS_FILEID(inode);
		__entry->dir = NFS_FILEID(dir);
		__entry->error = error;
		__assign_str(name, dentry->d_name.name);
		),

		TP_printk(
		"error=%d fileid=%02x:%02x:%llu name=%02x:%02x:%llu/%s",
		__entry->error,
		MAJOR(__entry->dev), MINOR(__entry->dev),
		__entry->fileid,
		MAJOR(__entry->dev), MINOR(__entry->dev),
		(unsigned long long)__entry->dir,
		__get_str(name)
		)
		);

		DECLARE_EVENT_CLASS(nfs_rename_event,
		TP_PROTO(
		const struct inode *old_dir,