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Commit cdd16d02 authored by Miklos Szeredi's avatar Miklos Szeredi Committed by Al Viro
Browse files

[patch 2/3] vfs: dcache cleanups 



Comment from Al Viro: add prepend_name() wrapper.

Signed-off-by: default avatarMiklos Szeredi <mszeredi@suse.cz>
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 31f3e0b3

fs/dcache.c

+14 −17
Original line number Diff line number Diff line
@@ -1747,8 +1747,7 @@ struct dentry *d_materialise_unique(struct dentry *dentry, struct inode *inode) 
	BUG();

}



static int prepend(char **buffer, int *buflen, const char *str,

			  int namelen)

static int prepend(char **buffer, int *buflen, const char *str, int namelen)

{

	*buflen -= namelen;

	if (*buflen < 0)
@@ -1758,6 +1757,11 @@ static int prepend(char **buffer, int *buflen, const char *str, 
	return 0;

}



static int prepend_name(char **buffer, int *buflen, struct qstr *name)

{

	return prepend(buffer, buflen, name->name, name->len);

}



/**

 * __d_path - return the path of a dentry

 * @path: the dentry/vfsmount to report
@@ -1811,8 +1815,7 @@ char *__d_path(const struct path *path, struct path *root, 
		}

		parent = dentry->d_parent;

		prefetch(parent);

		if ((prepend(&end, &buflen, dentry->d_name.name,

				dentry->d_name.len) != 0) ||

		if ((prepend_name(&end, &buflen, &dentry->d_name) != 0) ||

		    (prepend(&end, &buflen, "/", 1) != 0))

			goto Elong;

		retval = end;
@@ -1825,8 +1828,7 @@ char *__d_path(const struct path *path, struct path *root, 


global_root:

	retval += 1;	/* hit the slash */

	if (prepend(&retval, &buflen, dentry->d_name.name,

		    dentry->d_name.len) != 0)

	if (prepend_name(&retval, &buflen, &dentry->d_name) != 0)

		goto Elong;

	root->mnt = vfsmnt;

	root->dentry = dentry;
@@ -1918,16 +1920,11 @@ char *dentry_path(struct dentry *dentry, char *buf, int buflen) 
	retval = end-1;

	*retval = '/';



	for (;;) {

		struct dentry *parent;

		if (IS_ROOT(dentry))

			break;

	while (!IS_ROOT(dentry)) {

		struct dentry *parent = dentry->d_parent;



		parent = dentry->d_parent;

		prefetch(parent);



		if ((prepend(&end, &buflen, dentry->d_name.name,

				dentry->d_name.len) != 0) ||

		if ((prepend_name(&end, &buflen, &dentry->d_name) != 0) ||

		    (prepend(&end, &buflen, "/", 1) != 0))

			goto Elong;
@@ -1978,7 +1975,7 @@ asmlinkage long sys_getcwd(char __user *buf, unsigned long size) 
	error = -ENOENT;

	/* Has the current directory has been unlinked? */

	spin_lock(&dcache_lock);

	if (pwd.dentry->d_parent == pwd.dentry || !d_unhashed(pwd.dentry)) {

	if (IS_ROOT(pwd.dentry) || !d_unhashed(pwd.dentry)) {

		unsigned long len;

		struct path tmp = root;

		char * cwd;