1 files changed, 68 insertions, 76 deletions

diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index 9dc036f18356..5839b229cd0e 100644
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -99,7 +99,7 @@ static int expkey_parse(struct cache_detail *cd, char *mesg, int mlen)
 	int fsidtype;
 	char *ep;
 	struct svc_expkey key;
-	struct svc_expkey *ek;
+	struct svc_expkey *ek = NULL;
 
 	if (mesg[mlen-1] != '\n')
 		return -EINVAL;
@@ -107,7 +107,8 @@ static int expkey_parse(struct cache_detail *cd, char *mesg, int mlen)
 
 	buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 	err = -ENOMEM;
-	if (!buf) goto out;
+	if (!buf)
+		goto out;
 
 	err = -EINVAL;
 	if ((len=qword_get(&mesg, buf, PAGE_SIZE)) <= 0)
@@ -151,34 +152,32 @@ static int expkey_parse(struct cache_detail *cd, char *mesg, int mlen)
 
 	/* now we want a pathname, or empty meaning NEGATIVE  */
 	err = -EINVAL;
-	if ((len=qword_get(&mesg, buf, PAGE_SIZE)) < 0)
+	len = qword_get(&mesg, buf, PAGE_SIZE);
+	if (len < 0)
 		goto out;
 	dprintk("Path seems to be <%s>\n", buf);
 	err = 0;
 	if (len == 0) {
 		set_bit(CACHE_NEGATIVE, &key.h.flags);
 		ek = svc_expkey_update(&key, ek);
-		if (ek)
-			cache_put(&ek->h, &svc_expkey_cache);
-		else err = -ENOMEM;
+		if (!ek)
+			err = -ENOMEM;
 	} else {
-		struct nameidata nd;
-		err = path_lookup(buf, 0, &nd);
+		err = kern_path(buf, 0, &key.ek_path);
 		if (err)
 			goto out;
 
 		dprintk("Found the path %s\n", buf);
-		key.ek_path = nd.path;
 
 		ek = svc_expkey_update(&key, ek);
-		if (ek)
-			cache_put(&ek->h, &svc_expkey_cache);
-		else
+		if (!ek)
 			err = -ENOMEM;
-		path_put(&nd.path);
+		path_put(&key.ek_path);
 	}
 	cache_flush();
  out:
+	if (ek)
+		cache_put(&ek->h, &svc_expkey_cache);
 	if (dom)
 		auth_domain_put(dom);
 	kfree(buf);
@@ -500,35 +499,22 @@ static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
 	int len;
 	int err;
 	struct auth_domain *dom = NULL;
-	struct nameidata nd;
-	struct svc_export exp, *expp;
+	struct svc_export exp = {}, *expp;
 	int an_int;
 
-	nd.path.dentry = NULL;
-	exp.ex_pathname = NULL;
-
-	/* fs locations */
-	exp.ex_fslocs.locations = NULL;
-	exp.ex_fslocs.locations_count = 0;
-	exp.ex_fslocs.migrated = 0;
-
-	exp.ex_uuid = NULL;
-
-	/* secinfo */
-	exp.ex_nflavors = 0;
-
 	if (mesg[mlen-1] != '\n')
 		return -EINVAL;
 	mesg[mlen-1] = 0;
 
 	buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
-	err = -ENOMEM;
-	if (!buf) goto out;
+	if (!buf)
+		return -ENOMEM;
 
 	/* client */
-	len = qword_get(&mesg, buf, PAGE_SIZE);
 	err = -EINVAL;
-	if (len <= 0) goto out;
+	len = qword_get(&mesg, buf, PAGE_SIZE);
+	if (len <= 0)
+		goto out;
 
 	err = -ENOENT;
 	dom = auth_domain_find(buf);
@@ -537,25 +523,25 @@ static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
 
 	/* path */
 	err = -EINVAL;
-	if ((len=qword_get(&mesg, buf, PAGE_SIZE)) <= 0)
-		goto out;
-	err = path_lookup(buf, 0, &nd);
-	if (err) goto out_no_path;
+	if ((len = qword_get(&mesg, buf, PAGE_SIZE)) <= 0)
+		goto out1;
+
+	err = kern_path(buf, 0, &exp.ex_path);
+	if (err)
+		goto out1;
 
-	exp.h.flags = 0;
 	exp.ex_client = dom;
-	exp.ex_path.mnt = nd.path.mnt;
-	exp.ex_path.dentry = nd.path.dentry;
-	exp.ex_pathname = kstrdup(buf, GFP_KERNEL);
+
 	err = -ENOMEM;
+	exp.ex_pathname = kstrdup(buf, GFP_KERNEL);
 	if (!exp.ex_pathname)
-		goto out;
+		goto out2;
 
 	/* expiry */
 	err = -EINVAL;
 	exp.h.expiry_time = get_expiry(&mesg);
 	if (exp.h.expiry_time == 0)
-		goto out;
+		goto out3;
 
 	/* flags */
 	err = get_int(&mesg, &an_int);
@@ -563,22 +549,26 @@ static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
 		err = 0;
 		set_bit(CACHE_NEGATIVE, &exp.h.flags);
 	} else {
-		if (err || an_int < 0) goto out;	
+		if (err || an_int < 0)
+			goto out3;
 		exp.ex_flags= an_int;
 	
 		/* anon uid */
 		err = get_int(&mesg, &an_int);
-		if (err) goto out;
+		if (err)
+			goto out3;
 		exp.ex_anon_uid= an_int;
 
 		/* anon gid */
 		err = get_int(&mesg, &an_int);
-		if (err) goto out;
+		if (err)
+			goto out3;
 		exp.ex_anon_gid= an_int;
 
 		/* fsid */
 		err = get_int(&mesg, &an_int);
-		if (err) goto out;
+		if (err)
+			goto out3;
 		exp.ex_fsid = an_int;
 
 		while ((len = qword_get(&mesg, buf, PAGE_SIZE)) > 0) {
@@ -604,12 +594,13 @@ static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
 				 */
 				break;
 			if (err)
-				goto out;
+				goto out4;
 		}
 
-		err = check_export(nd.path.dentry->d_inode, exp.ex_flags,
+		err = check_export(exp.ex_path.dentry->d_inode, exp.ex_flags,
 				   exp.ex_uuid);
-		if (err) goto out;
+		if (err)
+			goto out4;
 	}
 
 	expp = svc_export_lookup(&exp);
@@ -622,15 +613,16 @@ static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
 		err = -ENOMEM;
 	else
 		exp_put(expp);
- out:
+out4:
 	nfsd4_fslocs_free(&exp.ex_fslocs);
 	kfree(exp.ex_uuid);
+out3:
 	kfree(exp.ex_pathname);
-	if (nd.path.dentry)
-		path_put(&nd.path);
- out_no_path:
-	if (dom)
-		auth_domain_put(dom);
+out2:
+	path_put(&exp.ex_path);
+out1:
+	auth_domain_put(dom);
+out:
 	kfree(buf);
 	return err;
 }
@@ -998,7 +990,7 @@ exp_export(struct nfsctl_export *nxp)
 	struct svc_export	*exp = NULL;
 	struct svc_export	new;
 	struct svc_expkey	*fsid_key = NULL;
-	struct nameidata nd;
+	struct path path;
 	int		err;
 
 	/* Consistency check */
@@ -1021,12 +1013,12 @@ exp_export(struct nfsctl_export *nxp)
 
 
 	/* Look up the dentry */
-	err = path_lookup(nxp->ex_path, 0, &nd);
+	err = kern_path(nxp->ex_path, 0, &path);
 	if (err)
 		goto out_put_clp;
 	err = -EINVAL;
 
-	exp = exp_get_by_name(clp, nd.path.mnt, nd.path.dentry, NULL);
+	exp = exp_get_by_name(clp, path.mnt, path.dentry, NULL);
 
 	memset(&new, 0, sizeof(new));
 
@@ -1034,8 +1026,8 @@ exp_export(struct nfsctl_export *nxp)
 	if ((nxp->ex_flags & NFSEXP_FSID) &&
 	    (!IS_ERR(fsid_key = exp_get_fsid_key(clp, nxp->ex_dev))) &&
 	    fsid_key->ek_path.mnt &&
-	    (fsid_key->ek_path.mnt != nd.path.mnt ||
-	     fsid_key->ek_path.dentry != nd.path.dentry))
+	    (fsid_key->ek_path.mnt != path.mnt ||
+	     fsid_key->ek_path.dentry != path.dentry))
 		goto finish;
 
 	if (!IS_ERR(exp)) {
@@ -1051,7 +1043,7 @@ exp_export(struct nfsctl_export *nxp)
 		goto finish;
 	}
 
-	err = check_export(nd.path.dentry->d_inode, nxp->ex_flags, NULL);
+	err = check_export(path.dentry->d_inode, nxp->ex_flags, NULL);
 	if (err) goto finish;
 
 	err = -ENOMEM;
@@ -1064,7 +1056,7 @@ exp_export(struct nfsctl_export *nxp)
 	if (!new.ex_pathname)
 		goto finish;
 	new.ex_client = clp;
-	new.ex_path = nd.path;
+	new.ex_path = path;
 	new.ex_flags = nxp->ex_flags;
 	new.ex_anon_uid = nxp->ex_anon_uid;
 	new.ex_anon_gid = nxp->ex_anon_gid;
@@ -1090,7 +1082,7 @@ finish:
 		exp_put(exp);
 	if (fsid_key && !IS_ERR(fsid_key))
 		cache_put(&fsid_key->h, &svc_expkey_cache);
-	path_put(&nd.path);
+	path_put(&path);
 out_put_clp:
 	auth_domain_put(clp);
 out_unlock:
@@ -1121,7 +1113,7 @@ exp_unexport(struct nfsctl_export *nxp)
 {
 	struct auth_domain *dom;
 	svc_export *exp;
-	struct nameidata nd;
+	struct path path;
 	int		err;
 
 	/* Consistency check */
@@ -1138,13 +1130,13 @@ exp_unexport(struct nfsctl_export *nxp)
 		goto out_unlock;
 	}
 
-	err = path_lookup(nxp->ex_path, 0, &nd);
+	err = kern_path(nxp->ex_path, 0, &path);
 	if (err)
 		goto out_domain;
 
 	err = -EINVAL;
-	exp = exp_get_by_name(dom, nd.path.mnt, nd.path.dentry, NULL);
-	path_put(&nd.path);
+	exp = exp_get_by_name(dom, path.mnt, path.dentry, NULL);
+	path_put(&path);
 	if (IS_ERR(exp))
 		goto out_domain;
 
@@ -1166,26 +1158,26 @@ out_unlock:
  * since its harder to fool a kernel module than a user space program.
  */
 int
-exp_rootfh(svc_client *clp, char *path, struct knfsd_fh *f, int maxsize)
+exp_rootfh(svc_client *clp, char *name, struct knfsd_fh *f, int maxsize)
 {
 	struct svc_export	*exp;
-	struct nameidata	nd;
+	struct path		path;
 	struct inode		*inode;
 	struct svc_fh		fh;
 	int			err;
 
 	err = -EPERM;
 	/* NB: we probably ought to check that it's NUL-terminated */
-	if (path_lookup(path, 0, &nd)) {
-		printk("nfsd: exp_rootfh path not found %s", path);
+	if (kern_path(name, 0, &path)) {
+		printk("nfsd: exp_rootfh path not found %s", name);
 		return err;
 	}
-	inode = nd.path.dentry->d_inode;
+	inode = path.dentry->d_inode;
 
 	dprintk("nfsd: exp_rootfh(%s [%p] %s:%s/%ld)\n",
-		 path, nd.path.dentry, clp->name,
+		 name, path.dentry, clp->name,
 		 inode->i_sb->s_id, inode->i_ino);
-	exp = exp_parent(clp, nd.path.mnt, nd.path.dentry, NULL);
+	exp = exp_parent(clp, path.mnt, path.dentry, NULL);
 	if (IS_ERR(exp)) {
 		err = PTR_ERR(exp);
 		goto out;
@@ -1195,7 +1187,7 @@ exp_rootfh(svc_client *clp, char *path, struct knfsd_fh *f, int maxsize)
 	 * fh must be initialized before calling fh_compose
 	 */
 	fh_init(&fh, maxsize);
-	if (fh_compose(&fh, exp, nd.path.dentry, NULL))
+	if (fh_compose(&fh, exp, path.dentry, NULL))
 		err = -EINVAL;
 	else
 		err = 0;
@@ -1203,7 +1195,7 @@ exp_rootfh(svc_client *clp, char *path, struct knfsd_fh *f, int maxsize)
 	fh_put(&fh);
 	exp_put(exp);
 out:
-	path_put(&nd.path);
+	path_put(&path);
 	return err;
 }