From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965163Ab3BMSCn (ORCPT ); Wed, 13 Feb 2013 13:02:43 -0500 Received: from out02.mta.xmission.com ([166.70.13.232]:51918 "EHLO out02.mta.xmission.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965153Ab3BMSCk (ORCPT ); Wed, 13 Feb 2013 13:02:40 -0500 From: "Eric W. Biederman" To: Cc: Linux Containers , , "Serge E. Hallyn" , "Eric W. Biederman" , "J. Bruce Fields" , Trond Myklebust Date: Wed, 13 Feb 2013 09:51:45 -0800 Message-Id: <1360777934-5663-56-git-send-email-ebiederm@xmission.com> X-Mailer: git-send-email 1.7.5.4 In-Reply-To: <1360777934-5663-1-git-send-email-ebiederm@xmission.com> References: <87621w14vs.fsf@xmission.com> <1360777934-5663-1-git-send-email-ebiederm@xmission.com> X-XM-AID: U2FsdGVkX1+uc0KuJmXhDUI0jCb6+Fx7yzjQehrc/BI= X-SA-Exim-Connect-IP: 98.207.153.68 X-SA-Exim-Mail-From: ebiederm@xmission.com X-Spam-Report: * -1.0 ALL_TRUSTED Passed through trusted hosts only via SMTP * 0.1 XMSubLong Long Subject * 0.0 T_TM2_M_HEADER_IN_MSG BODY: T_TM2_M_HEADER_IN_MSG * -0.0 DCC_CHECK_NEGATIVE Not listed in DCC * [sa03 1397; Body=1 Fuz1=1 Fuz2=1] * 0.0 T_XMDrugObfuBody_08 obfuscated drug references X-Spam-DCC: XMission; sa03 1397; Body=1 Fuz1=1 Fuz2=1 X-Spam-Combo: ; X-Spam-Relay-Country: Subject: [PATCH review 56/85] nfs: Convert idmap to use kuids and kgids X-Spam-Flag: No X-SA-Exim-Version: 4.2.1 (built Wed, 14 Nov 2012 14:26:46 -0700) X-SA-Exim-Scanned: Yes (on in02.mta.xmission.com) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "Eric W. Biederman" Convert nfs_map_name_to_uid to return a kuid_t value. Convert nfs_map_name_to_gid to return a kgid_t value. Convert nfs_map_uid_to_name to take a kuid_t paramater. Convert nfs_map_gid_to_name to take a kgid_t paramater. Tweak nfs_fattr_map_owner_to_name to use a kuid_t intermediate value. Tweak nfs_fattr_map_group_to_name to use a kgid_t intermediate value. Which makes these functions properly handle kuids and kgids, including erroring of the generated kuid or kgid is invalid. Cc: "J. Bruce Fields" Cc: Trond Myklebust Signed-off-by: "Eric W. Biederman" --- fs/nfs/idmap.c | 50 ++++++++++++++++++++++++++++++-------------- include/linux/nfs_idmap.h | 9 ++++--- 2 files changed, 39 insertions(+), 20 deletions(-) diff --git a/fs/nfs/idmap.c b/fs/nfs/idmap.c index f77017c..b9623d1 100644 --- a/fs/nfs/idmap.c +++ b/fs/nfs/idmap.c @@ -97,7 +97,7 @@ static void nfs_fattr_free_group_name(struct nfs_fattr *fattr) static bool nfs_fattr_map_owner_name(struct nfs_server *server, struct nfs_fattr *fattr) { struct nfs4_string *owner = fattr->owner_name; - __u32 uid; + kuid_t uid; if (!(fattr->valid & NFS_ATTR_FATTR_OWNER_NAME)) return false; @@ -111,7 +111,7 @@ static bool nfs_fattr_map_owner_name(struct nfs_server *server, struct nfs_fattr static bool nfs_fattr_map_group_name(struct nfs_server *server, struct nfs_fattr *fattr) { struct nfs4_string *group = fattr->group_name; - __u32 gid; + kgid_t gid; if (!(fattr->valid & NFS_ATTR_FATTR_GROUP_NAME)) return false; @@ -837,43 +837,61 @@ idmap_release_pipe(struct inode *inode) nfs_idmap_abort_pipe_upcall(idmap, -EPIPE); } -int nfs_map_name_to_uid(const struct nfs_server *server, const char *name, size_t namelen, __u32 *uid) +int nfs_map_name_to_uid(const struct nfs_server *server, const char *name, size_t namelen, kuid_t *uid) { struct idmap *idmap = server->nfs_client->cl_idmap; + __u32 id = -1; + int ret = 0; - if (nfs_map_string_to_numeric(name, namelen, uid)) - return 0; - return nfs_idmap_lookup_id(name, namelen, "uid", uid, idmap); + if (!nfs_map_string_to_numeric(name, namelen, &id)) + ret = nfs_idmap_lookup_id(name, namelen, "uid", &id, idmap); + if (ret == 0) { + *uid = make_kuid(&init_user_ns, id); + if (!uid_valid(*uid)) + ret = -ERANGE; + } + return ret; } -int nfs_map_group_to_gid(const struct nfs_server *server, const char *name, size_t namelen, __u32 *gid) +int nfs_map_group_to_gid(const struct nfs_server *server, const char *name, size_t namelen, kgid_t *gid) { struct idmap *idmap = server->nfs_client->cl_idmap; + __u32 id = -1; + int ret = 0; - if (nfs_map_string_to_numeric(name, namelen, gid)) - return 0; - return nfs_idmap_lookup_id(name, namelen, "gid", gid, idmap); + if (!nfs_map_string_to_numeric(name, namelen, &id)) + ret = nfs_idmap_lookup_id(name, namelen, "gid", &id, idmap); + if (ret == 0) { + *gid = make_kgid(&init_user_ns, id); + if (!gid_valid(*gid)) + ret = -ERANGE; + } + return ret; } -int nfs_map_uid_to_name(const struct nfs_server *server, __u32 uid, char *buf, size_t buflen) +int nfs_map_uid_to_name(const struct nfs_server *server, kuid_t uid, char *buf, size_t buflen) { struct idmap *idmap = server->nfs_client->cl_idmap; int ret = -EINVAL; + __u32 id; + id = from_kuid(&init_user_ns, uid); if (!(server->caps & NFS_CAP_UIDGID_NOMAP)) - ret = nfs_idmap_lookup_name(uid, "user", buf, buflen, idmap); + ret = nfs_idmap_lookup_name(id, "user", buf, buflen, idmap); if (ret < 0) - ret = nfs_map_numeric_to_string(uid, buf, buflen); + ret = nfs_map_numeric_to_string(id, buf, buflen); return ret; } -int nfs_map_gid_to_group(const struct nfs_server *server, __u32 gid, char *buf, size_t buflen) +int nfs_map_gid_to_group(const struct nfs_server *server, kgid_t gid, char *buf, size_t buflen) { struct idmap *idmap = server->nfs_client->cl_idmap; int ret = -EINVAL; + __u32 id; + id = from_kgid(&init_user_ns, gid); if (!(server->caps & NFS_CAP_UIDGID_NOMAP)) - ret = nfs_idmap_lookup_name(gid, "group", buf, buflen, idmap); + ret = nfs_idmap_lookup_name(id, "group", buf, buflen, idmap); if (ret < 0) - ret = nfs_map_numeric_to_string(gid, buf, buflen); + ret = nfs_map_numeric_to_string(id, buf, buflen); return ret; } diff --git a/include/linux/nfs_idmap.h b/include/linux/nfs_idmap.h index 2dcef3a..0f4b79d 100644 --- a/include/linux/nfs_idmap.h +++ b/include/linux/nfs_idmap.h @@ -36,6 +36,7 @@ #ifndef NFS_IDMAP_H #define NFS_IDMAP_H +#include #include @@ -67,10 +68,10 @@ void nfs_fattr_init_names(struct nfs_fattr *fattr, void nfs_fattr_free_names(struct nfs_fattr *); void nfs_fattr_map_and_free_names(struct nfs_server *, struct nfs_fattr *); -int nfs_map_name_to_uid(const struct nfs_server *, const char *, size_t, __u32 *); -int nfs_map_group_to_gid(const struct nfs_server *, const char *, size_t, __u32 *); -int nfs_map_uid_to_name(const struct nfs_server *, __u32, char *, size_t); -int nfs_map_gid_to_group(const struct nfs_server *, __u32, char *, size_t); +int nfs_map_name_to_uid(const struct nfs_server *, const char *, size_t, kuid_t *); +int nfs_map_group_to_gid(const struct nfs_server *, const char *, size_t, kgid_t *); +int nfs_map_uid_to_name(const struct nfs_server *, kuid_t, char *, size_t); +int nfs_map_gid_to_group(const struct nfs_server *, kgid_t, char *, size_t); extern unsigned int nfs_idmap_cache_timeout; #endif /* NFS_IDMAP_H */ -- 1.7.5.4