lustre/utils/gss/lgss_utils.h

   1 /*
   2  * Modifications for Lustre
   3  *
   4  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
   5  *
   6  * Author: Eric Mei <ericm@clusterfs.com>
   7  */
   8
   9 /*
  10   Copyright (c) 2004 The Regents of the University of Michigan.
  11   All rights reserved.
  12
  13   Redistribution and use in source and binary forms, with or without
  14   modification, are permitted provided that the following conditions
  15   are met:
  16
  17   1. Redistributions of source code must retain the above copyright
  18      notice, this list of conditions and the following disclaimer.
  19   2. Redistributions in binary form must reproduce the above copyright
  20      notice, this list of conditions and the following disclaimer in the
  21      documentation and/or other materials provided with the distribution.
  22   3. Neither the name of the University nor the names of its
  23      contributors may be used to endorse or promote products derived
  24      from this software without specific prior written permission.
  25
  26   THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  27   WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  28   MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  29   DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  30   FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  31   CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  32   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  33   BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  34   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  35   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  36   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  37 */
  38
  39 #ifndef LGSS_UTILS_H
  40 #define LGSS_UTILS_H
  41
  42 #include <inttypes.h>
  43 #include <stdlib.h>
  44 #include <stdint.h>
  45 #include <gssapi/gssapi.h>
  46
  47 #include "lsupport.h"
  48
  49 #define LGSS_SVC_MGS_STR        "lustre_mgs"
  50 #define LGSS_SVC_MDS_STR        "lustre_mds"
  51 #define LGSS_SVC_OSS_STR        "lustre_oss"
  52 #define LGSS_USR_ROOT_STR       "lustre_root"
  53
  54 typedef enum {
  55         LGSS_SVC_MGS    = 0,
  56         LGSS_SVC_MDS    = 1,
  57         LGSS_SVC_OSS    = 2,
  58         LGSS_SVC_MAX
  59 } lgss_svc_t;
  60
  61 extern const char *lgss_svc_str[LGSS_SVC_MAX];
  62
  63 /****************************************
  64  * inter-process locking                *
  65  ****************************************/
  66
  67 typedef enum {
  68         LGSS_MUTEX_KRB5 = 0,
  69         LGSS_MUTEX_MAX
  70 } lgss_mutex_id_t;
  71
  72 int lgss_mutex_lock(lgss_mutex_id_t mid);
  73 int lgss_mutex_unlock(lgss_mutex_id_t mid);
  74
  75 /****************************************
  76  * log facilities                       *
  77  ****************************************/
  78
  79 /*
  80  * log level:
  81  * LL_ERR:      critical error messages
  82  * LL_WARN:     warning (default)
  83  * LL_INFO:     important infomation
  84  * LL_DEBUG:    debugging
  85  * LL_TRACE:    excessive tracing messages
  86  */
  87 typedef enum {
  88         LL_ERR          = 0,
  89         LL_WARN         = 1,
  90         LL_INFO         = 2,
  91         LL_DEBUG        = 3,
  92         LL_TRACE        = 4,
  93         LL_MAX
  94 } loglevel_t;
  95
  96 extern loglevel_t g_log_level;
  97
  98 void lgss_set_loglevel(loglevel_t level);
  99
 100 void __logmsg(loglevel_t level, const char *func, const char *format, ...)
 101         __attribute__((format(printf, 3, 4)));
 102
 103 void __logmsg_gss(loglevel_t level, const char *func, const gss_OID mech,
 104                   uint32_t major, uint32_t minor, const char *format, ...)
 105         __attribute__((format(printf, 6, 7)));
 106
 107 #define logmsg(loglevel, format, args...)                               \
 108 do {                                                                    \
 109         if (loglevel <= g_log_level)                                    \
 110                 __logmsg(loglevel, __FUNCTION__, format, ##args);       \
 111 } while (0)
 112
 113 #define logmsg_gss(loglevel, mech, major, minor, format, args...)       \
 114 do {                                                                    \
 115         if (loglevel <= g_log_level)                                    \
 116                 __logmsg_gss(loglevel, __FUNCTION__, mech,              \
 117                              major, minor, format, ##args);             \
 118 } while (0)
 119
 120 #define lassert(exp)                                                    \
 121 do {                                                                    \
 122         if (!(exp)) {                                                   \
 123                 logmsg(LL_ERR, "ASSERTION FAILED: %s", #exp);           \
 124                 exit(-1);                                               \
 125         }                                                               \
 126 } while (0)
 127
 128 /*
 129  * for compatible reason, we're using files (context_xxx.c) from nfs-utils
 130  */
 131 #define printerr(priority, format, args...)                             \
 132         logmsg(priority, format, ##args)
 133
 134 #define pgsserr(msg, maj_stat, min_stat, mech)                          \
 135         logmsg_gss(LL_ERR, mech, maj_stat, min_stat, msg)
 136
 137 /****************************************
 138  * GSS MECH, OIDs                       *
 139  ****************************************/
 140
 141 extern gss_OID_desc krb5oid;
 142 extern gss_OID_desc spkm3oid;
 143 extern gss_OID_desc nulloid;
 144 extern gss_OID_desc skoid;
 145
 146 /****************************************
 147  * client credentials                   *
 148  ****************************************/
 149
 150 struct lgss_cred;
 151
 152 struct lgss_mech_type {
 153         char            *lmt_name;
 154         enum lgss_mech   lmt_mech_n;
 155
 156         int              (*lmt_init)(void);
 157         void             (*lmt_fini)(void);
 158         int              (*lmt_prepare_cred)(struct lgss_cred *cred);
 159         void             (*lmt_release_cred)(struct lgss_cred *cred);
 160         int              (*lmt_using_cred)(struct lgss_cred *cred);
 161         int              (*lmt_validate_cred)(struct lgss_cred *cred,
 162                                               gss_buffer_desc *token,
 163                                               gss_buffer_desc *ctx_token);
 164 };
 165
 166 struct lgss_cred {
 167         int                     lc_uid;
 168         unsigned int            lc_root_flags;
 169         uint64_t                lc_self_nid;
 170         uint64_t                lc_tgt_nid;
 171         uint32_t                lc_tgt_svc;
 172         char                    lc_svc_type;
 173         char                    *lc_tgt_uuid;
 174
 175         struct lgss_mech_type   *lc_mech;
 176         void                    *lc_mech_cred;
 177         gss_buffer_desc         lc_mech_token;
 178 };
 179
 180 struct lgss_mech_type *lgss_name2mech(const char *mech_name);
 181 int  lgss_mech_initialize(struct lgss_mech_type *mech);
 182 void lgss_mech_finalize(struct lgss_mech_type *mech);
 183
 184 struct lgss_cred * lgss_create_cred(struct lgss_mech_type *mech);
 185 void lgss_destroy_cred(struct lgss_cred *cred);
 186 int lgss_prepare_cred(struct lgss_cred *cred);
 187 void lgss_release_cred(struct lgss_cred *cred);
 188 int lgss_using_cred(struct lgss_cred *cred);
 189 int lgss_validate_cred(struct lgss_cred *cred, gss_buffer_desc *token,
 190                        gss_buffer_desc *ctx_token);
 191
 192 int lgss_get_service_str(char **string, uint32_t lsvc, uint64_t tgt_nid);
 193
 194 static inline
 195 int gss_OID_equal(gss_OID_desc *oid1, gss_OID_desc *oid2)
 196 {
 197         return (oid1->length == oid2->length &&
 198                 memcmp(oid1->elements, oid2->elements, oid1->length) == 0);
 199 }
 200
 201 #ifndef g_OID_equal
 202 #define g_OID_equal(o1,o2)      gss_OID_equal((o1), (o2))
 203 #endif
 204
 205 #endif /* LGSS_UTILS_H */