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From: Trond Myklebust <Trond.Myklebust@netapp.com>
To: linux-nfs@vger.kernel.org
Subject: [PATCH v3 2/5] NFSv4: Send unmapped uid/gids to the server if the idmapper fails
Date: Tue, 30 Nov 2010 09:43:28 -0500	[thread overview]
Message-ID: <1291128211-7961-3-git-send-email-Trond.Myklebust@netapp.com> (raw)
In-Reply-To: <1291128211-7961-2-git-send-email-Trond.Myklebust@netapp.com>

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
---
 fs/nfs/idmap.c |   30 ++++++++++++++++++++++++++----
 1 files changed, 26 insertions(+), 4 deletions(-)

diff --git a/fs/nfs/idmap.c b/fs/nfs/idmap.c
index 4281da6..9bf5921 100644
--- a/fs/nfs/idmap.c
+++ b/fs/nfs/idmap.c
@@ -52,6 +52,11 @@ static int nfs_map_string_to_numeric(const char *name, size_t namelen, __u32 *re
 	return 1;
 }
 
+static int nfs_map_numeric_to_string(__u32 id, char *buf, size_t buflen)
+{
+	return snprintf(buf, buflen, "%u", id);
+}
+
 #ifdef CONFIG_NFS_USE_NEW_IDMAPPER
 
 #include <linux/slab.h>
@@ -252,11 +257,20 @@ int nfs_map_group_to_gid(struct nfs_client *clp, const char *name, size_t namele
 
 int nfs_map_uid_to_name(struct nfs_client *clp, __u32 uid, char *buf, size_t buflen)
 {
-	return nfs_idmap_lookup_name(uid, "user", buf, buflen);
+	int ret;
+	ret = nfs_idmap_lookup_name(uid, "user", buf, buflen);
+	if (ret < 0)
+		ret = nfs_map_numeric_to_string(uid, buf, buflen);
+	return ret;
 }
 int nfs_map_gid_to_group(struct nfs_client *clp, __u32 gid, char *buf, size_t buflen)
 {
-	return nfs_idmap_lookup_name(gid, "group", buf, buflen);
+	int ret;
+
+	ret = nfs_idmap_lookup_name(gid, "group", buf, buflen);
+	if (ret < 0)
+		ret = nfs_map_numeric_to_string(gid, buf, buflen);
+	return ret;
 }
 
 #else  /* CONFIG_NFS_USE_IDMAPPER not defined */
@@ -736,14 +750,22 @@ int nfs_map_group_to_gid(struct nfs_client *clp, const char *name, size_t namele
 int nfs_map_uid_to_name(struct nfs_client *clp, __u32 uid, char *buf, size_t buflen)
 {
 	struct idmap *idmap = clp->cl_idmap;
+	int ret;
 
-	return nfs_idmap_name(idmap, &idmap->idmap_user_hash, uid, buf);
+	ret = nfs_idmap_name(idmap, &idmap->idmap_user_hash, uid, buf);
+	if (ret < 0)
+		ret = nfs_map_numeric_to_string(uid, buf, buflen);
+	return ret;
 }
 int nfs_map_gid_to_group(struct nfs_client *clp, __u32 uid, char *buf, size_t buflen)
 {
 	struct idmap *idmap = clp->cl_idmap;
+	int ret;
 
-	return nfs_idmap_name(idmap, &idmap->idmap_group_hash, uid, buf);
+	ret = nfs_idmap_name(idmap, &idmap->idmap_group_hash, uid, buf);
+	if (ret < 0)
+		ret = nfs_map_numeric_to_string(uid, buf, buflen);
+	return ret;
 }
 
 #endif /* CONFIG_NFS_USE_NEW_IDMAPPER */
-- 
1.7.3.2


  reply	other threads:[~2010-11-30 14:43 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-11-30 14:43 [PATCH v3 0/5] Allow the admin to turn off NFSv4 uid/gid mapping Trond Myklebust
2010-11-30 14:43 ` [PATCH v3 1/5] NFSv4: If the server sends us a numeric uid/gid then accept it Trond Myklebust
2010-11-30 14:43   ` Trond Myklebust [this message]
2010-11-30 14:43     ` [PATCH v3 3/5] NFSv4: cleanup idmapper functions to take an nfs_server argument Trond Myklebust
2010-11-30 14:43       ` [PATCH v3 4/5] NFSv4: Propagate the error NFS4ERR_BADOWNER to nfs4_do_setattr Trond Myklebust
2010-11-30 14:43         ` [PATCH v3 5/5] NFSv4: Send unmapped uid/gids to the server when using auth_sys Trond Myklebust
2010-11-30 19:48           ` J. Bruce Fields
2010-11-30 21:48             ` Trond Myklebust

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