From f0b851689a5da2354f19bcbbac30cd2cab45c4a1 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Tue, 22 Feb 2011 15:44:31 -0800 Subject: [PATCH] NFSv4: Send unmapped uid/gids to the server if the idmapper fails Signed-off-by: Trond Myklebust --- fs/nfs/idmap.c | 30 ++++++++++++++++++++++++++---- 1 file changed, 26 insertions(+), 4 deletions(-) diff --git a/fs/nfs/idmap.c b/fs/nfs/idmap.c index cbe6e2fa8cef..8518573c3ffc 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 @@ -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_NEW_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 */