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Commit 26456955 authored by Dave Kleikamp's avatar Dave Kleikamp
Browse files

jfs: clean up jfs_rename and fix out of order unlock 



The end of jfs_rename(), which is also used by the error paths,
included a call to IWRITE_UNLOCK(new_ip) after labels out1, out2
and out3. If we come in through these labels, IWRITE_LOCK() has not
been called yet.

In moving that call to the correct spot, I also moved some
exceptional truncate code earlier as well, since the early error
paths don't need to deal with it, and I renamed out4: to out_tx: so
a future patch by Jan Kara doesn't need to deal with renumbering or
confusing out-of-order labels.

Signed-off-by: default avatarDave Kleikamp <dave.kleikamp@oracle.com>
parent f7f31adf

fs/jfs/namei.c

+13 −14
Original line number Diff line number Diff line
@@ -1161,7 +1161,7 @@ static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry, 
		rc = dtModify(tid, new_dir, &new_dname, &ino,

			      old_ip->i_ino, JFS_RENAME);

		if (rc)

			goto out4;

			goto out_tx;

		drop_nlink(new_ip);

		if (S_ISDIR(new_ip->i_mode)) {

			drop_nlink(new_ip);
@@ -1186,7 +1186,7 @@ static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry, 
			if ((new_size = commitZeroLink(tid, new_ip)) < 0) {

				txAbort(tid, 1);	/* Marks FS Dirty */

				rc = new_size;

				goto out4;

				goto out_tx;

			}

			tblk = tid_to_tblock(tid);

			tblk->xflag |= COMMIT_DELETE;
@@ -1204,7 +1204,7 @@ static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry, 
		if (rc) {

			jfs_err("jfs_rename didn't expect dtSearch to fail "

				"w/rc = %d", rc);

			goto out4;

			goto out_tx;

		}



		ino = old_ip->i_ino;
@@ -1212,7 +1212,7 @@ static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry, 
		if (rc) {

			if (rc == -EIO)

				jfs_err("jfs_rename: dtInsert returned -EIO");

			goto out4;

			goto out_tx;

		}

		if (S_ISDIR(old_ip->i_mode))

			inc_nlink(new_dir);
@@ -1227,7 +1227,7 @@ static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry, 
		jfs_err("jfs_rename did not expect dtDelete to return rc = %d",

			rc);

		txAbort(tid, 1);	/* Marks Filesystem dirty */

		goto out4;

		goto out_tx;

	}

	if (S_ISDIR(old_ip->i_mode)) {

		drop_nlink(old_dir);
@@ -1286,7 +1286,7 @@ static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry, 


	rc = txCommit(tid, ipcount, iplist, commit_flag);



      out4:

      out_tx:

	txEnd(tid);

	if (new_ip)

		mutex_unlock(&JFS_IP(new_ip)->commit_mutex);
@@ -1309,13 +1309,6 @@ static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry, 
	}

	if (new_ip && (new_ip->i_nlink == 0))

		set_cflag(COMMIT_Nolink, new_ip);

      out3:

	free_UCSname(&new_dname);

      out2:

	free_UCSname(&old_dname);

      out1:

	if (new_ip && !S_ISDIR(new_ip->i_mode))

		IWRITE_UNLOCK(new_ip);

	/*

	 * Truncating the directory index table is not guaranteed.  It

	 * may need to be done iteratively
@@ -1326,7 +1319,13 @@ static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry, 


		clear_cflag(COMMIT_Stale, old_dir);

	}



	if (new_ip && !S_ISDIR(new_ip->i_mode))

		IWRITE_UNLOCK(new_ip);

      out3:

	free_UCSname(&new_dname);

      out2:

	free_UCSname(&old_dname);

      out1:

	jfs_info("jfs_rename: returning %d", rc);

	return rc;

}