From: J.Bruce Fields <bfields@fieldses.org>
Date: Wed, 4 Oct 2006 09:16:17 +0000 (-0700)
Subject: [PATCH] knfsd: nfsd: store export path in export
X-Git-Tag: v2.6.19-rc1~98
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=commitdiff_plain;h=b009a873de05c6e0d7613df3584b6dcb2e4280ee

[PATCH] knfsd: nfsd: store export path in export

Store the export path in the svc_export structure instead of storing only the
dentry.  This will prevent the need for additional d_path calls to provide
NFSv4 fs_locations support.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index 597b3cbf8b0b..d3178de589e4 100644
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -325,6 +325,7 @@ static void svc_export_put(struct kref *ref)
 	dput(exp->ex_dentry);
 	mntput(exp->ex_mnt);
 	auth_domain_put(exp->ex_client);
+	kfree(exp->ex_path);
 	kfree(exp);
 }
 
@@ -398,6 +399,7 @@ static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
 	int an_int;
 
 	nd.dentry = NULL;
+	exp.ex_path = NULL;
 
 	if (mesg[mlen-1] != '\n')
 		return -EINVAL;
@@ -428,6 +430,10 @@ static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
 	exp.ex_client = dom;
 	exp.ex_mnt = nd.mnt;
 	exp.ex_dentry = nd.dentry;
+	exp.ex_path = kstrdup(buf, GFP_KERNEL);
+	err = -ENOMEM;
+	if (!exp.ex_path)
+		goto out;
 
 	/* expiry */
 	err = -EINVAL;
@@ -473,6 +479,7 @@ static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
 	else
 		exp_put(expp);
  out:
+ 	kfree(exp.ex_path);
 	if (nd.dentry)
 		path_release(&nd);
  out_no_path:
@@ -524,6 +531,7 @@ static void svc_export_init(struct cache_head *cnew, struct cache_head *citem)
 	new->ex_client = item->ex_client;
 	new->ex_dentry = dget(item->ex_dentry);
 	new->ex_mnt = mntget(item->ex_mnt);
+	new->ex_path = NULL;
 }
 
 static void export_update(struct cache_head *cnew, struct cache_head *citem)
@@ -535,6 +543,8 @@ static void export_update(struct cache_head *cnew, struct cache_head *citem)
 	new->ex_anon_uid = item->ex_anon_uid;
 	new->ex_anon_gid = item->ex_anon_gid;
 	new->ex_fsid = item->ex_fsid;
+	new->ex_path = item->ex_path;
+	item->ex_path = NULL;
 }
 
 static struct cache_head *svc_export_alloc(void)
diff --git a/include/linux/nfsd/export.h b/include/linux/nfsd/export.h
index d2a8abb5011a..47d96684b611 100644
--- a/include/linux/nfsd/export.h
+++ b/include/linux/nfsd/export.h
@@ -51,6 +51,7 @@ struct svc_export {
 	int			ex_flags;
 	struct vfsmount *	ex_mnt;
 	struct dentry *		ex_dentry;
+	char *			ex_path;
 	uid_t			ex_anon_uid;
 	gid_t			ex_anon_gid;
 	int			ex_fsid;