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Commit f3f8e175 authored by Al Viro's avatar Al Viro
Browse files

[PATCH] reduce the stack footprint of exportfs_decode_fh() 



no need to have _two_ 256-byte arrays on stack...

Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 9308a612

fs/exportfs/expfs.c

+4 −5
Original line number Diff line number Diff line
@@ -94,9 +94,8 @@ find_disconnected_root(struct dentry *dentry) 
 * It may already be, as the flag isn't always updated when connection happens.

 */

static int

reconnect_path(struct vfsmount *mnt, struct dentry *target_dir)

reconnect_path(struct vfsmount *mnt, struct dentry *target_dir, char *nbuf)

{

	char nbuf[NAME_MAX+1];

	int noprogress = 0;

	int err = -ESTALE;
@@ -360,6 +359,7 @@ struct dentry *exportfs_decode_fh(struct vfsmount *mnt, struct fid *fid, 
{

	const struct export_operations *nop = mnt->mnt_sb->s_export_op;

	struct dentry *result, *alias;

	char nbuf[NAME_MAX+1];

	int err;



	/*
@@ -379,7 +379,7 @@ struct dentry *exportfs_decode_fh(struct vfsmount *mnt, struct fid *fid, 
		 * filesystem root.

		 */

		if (result->d_flags & DCACHE_DISCONNECTED) {

			err = reconnect_path(mnt, result);

			err = reconnect_path(mnt, result, nbuf);

			if (err)

				goto err_result;

		}
@@ -395,7 +395,6 @@ struct dentry *exportfs_decode_fh(struct vfsmount *mnt, struct fid *fid, 
		 * It's not a directory.  Life is a little more complicated.

		 */

		struct dentry *target_dir, *nresult;

		char nbuf[NAME_MAX+1];



		/*

		 * See if either the dentry we just got from the filesystem
@@ -429,7 +428,7 @@ struct dentry *exportfs_decode_fh(struct vfsmount *mnt, struct fid *fid, 
		 * connected to the filesystem root.  The VFS really doesn't

		 * like disconnected directories..

		 */

		err = reconnect_path(mnt, target_dir);

		err = reconnect_path(mnt, target_dir, nbuf);

		if (err) {

			dput(target_dir);

			goto err_result;