-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*
* Modifications for Lustre
*
* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
const char *krb5_cc_type_mem = "MEMORY:";
const char *krb5_cc_type_file = "FILE:";
+const char *krb5_cred_root_suffix = "lustre_root";
+const char *krb5_cred_mds_suffix = "lustre_mds";
+const char *krb5_cred_oss_suffix = "lustre_oss";
char *krb5_this_realm = NULL;
char *krb5_keytab_file = "/etc/krb5.keytab";
char *krb5_cc_type = "FILE:";
char *krb5_cc_dir = "/tmp";
char *krb5_cred_prefix = "krb5cc_";
-char *krb5_cred_root_suffix = "lustre_root";
struct lgss_krb5_cred {
char kc_ccname[128];
static
int lkrb5_cc_check_tgt_princ(krb5_context ctx,
krb5_ccache ccache,
- krb5_principal princ)
+ krb5_principal princ,
+ unsigned int flag)
{
- logmsg(LL_TRACE, "principal: realm %.*s, type %d, size %d, name %.*s\n",
+ const char *princ_name;
+
+ logmsg(LL_DEBUG, "principal: realm %.*s, type %d, size %d, name %.*s\n",
krb5_princ_realm(ctx, princ)->length,
krb5_princ_realm(ctx, princ)->data,
krb5_princ_type(ctx, princ),
return -1;
}
- /* if it's mds service principal, or lustre_root principal
- * with host part, verify the hostname.
- * note we allow lustre_root without host part */
- if (lgss_krb5_strcmp(krb5_princ_name(ctx, princ),
- LGSS_SVC_MDS_STR) == 0) {
- if (svc_princ_verify_host(ctx, princ, LL_WARN)) {
- logmsg(LL_WARN, "mds service principal doesn't belong "
- "to this node\n");
+ /* check principal name */
+ switch (flag) {
+ case LGSS_ROOT_CRED_ROOT:
+ princ_name = LGSS_USR_ROOT_STR;
+ break;
+ case LGSS_ROOT_CRED_MDT:
+ princ_name = LGSS_SVC_MDS_STR;
+ break;
+ case LGSS_ROOT_CRED_OST:
+ princ_name = LGSS_SVC_OSS_STR;
+ break;
+ default:
+ lassert(0);
+ }
+
+ if (lgss_krb5_strcmp(krb5_princ_name(ctx, princ), princ_name)) {
+ logmsg(LL_WARN, "%.*s: we expect %s instead\n",
+ krb5_princ_name(ctx, princ)->length,
+ krb5_princ_name(ctx, princ)->data,
+ princ_name);
+ return -1;
+ }
+
+ /*
+ * verify the hostname part of the principal, except we do allow
+ * lustre_root without binding to a host.
+ */
+ if (krb5_princ_component(ctx, princ, 1) == NULL) {
+ if (flag != LGSS_ROOT_CRED_ROOT) {
+ logmsg(LL_WARN, "%.*s: missing hostname\n",
+ krb5_princ_name(ctx, princ)->length,
+ krb5_princ_name(ctx, princ)->data);
return -1;
}
- } else if (lgss_krb5_strcmp(krb5_princ_name(ctx, princ),
- LGSS_USR_ROOT_STR) == 0) {
- if (krb5_princ_component(ctx, princ, 1) != NULL &&
- svc_princ_verify_host(ctx, princ, LL_WARN)) {
- logmsg(LL_WARN, "lustre_root principal doesn't belong "
- "to this node\n");
+ } else {
+ if (svc_princ_verify_host(ctx, princ, LL_WARN)) {
+ logmsg(LL_DEBUG, "%.*s: doesn't belong to this node\n",
+ krb5_princ_name(ctx, princ)->length,
+ krb5_princ_name(ctx, princ)->data);
return -1;
}
- } else {
- logmsg(LL_WARN, "unexpected krb5 cc principal name %.*s\n",
- krb5_princ_name(ctx, princ)->length,
- krb5_princ_name(ctx, princ)->data);
- return -1;
}
logmsg(LL_TRACE, "principal is OK\n");
return 0;
}
-/*
- * find out whether current TGT cache is valid or not
+/**
+ * compose the TGT cc name, according to the root flags.
*/
static
-int lkrb5_check_root_tgt_cc(krb5_context ctx,
- krb5_ccache ccache,
- char *ccname)
+void get_root_tgt_ccname(char *ccname, int size, unsigned int flag)
+{
+ const char *suffix;
+
+ switch (flag) {
+ case LGSS_ROOT_CRED_ROOT:
+ suffix = krb5_cred_root_suffix;
+ break;
+ case LGSS_ROOT_CRED_MDT:
+ suffix = krb5_cred_mds_suffix;
+ break;
+ case LGSS_ROOT_CRED_OST:
+ suffix = krb5_cred_oss_suffix;
+ break;
+ default:
+ lassert(0);
+ }
+
+ snprintf(ccname, size, "%s%s/%s%s_%s",
+ krb5_cc_type, krb5_cc_dir, krb5_cred_prefix,
+ suffix, krb5_this_realm);
+}
+
+static
+int lkrb5_check_root_tgt_cc_base(krb5_context ctx,
+ krb5_ccache ccache,
+ char *ccname,
+ unsigned int flag)
{
- struct stat statbuf;
krb5_ccache tgt_ccache;
krb5_creds cred;
krb5_principal princ;
krb5_cc_cursor cursor;
krb5_error_code code;
- char *ccfile;
time_t now;
int rc = -1, found = 0;
- if (strncmp(ccname, krb5_cc_type, strlen(krb5_cc_type_file))) {
- logmsg(LL_ERR, "unexpected cc type\n");
- return -1;
- }
-
- ccfile = ccname + strlen(krb5_cc_type_file);
- logmsg(LL_TRACE, "cc file name: %s\n", ccfile);
-
- /* firstly make sure the cache file is there */
- if (stat(ccfile, &statbuf)) {
- logmsg(LL_DEBUG, "krb5 cc %s: %s\n", ccname, strerror(errno));
- return -1;
- }
-
/* prepare parsing the cache file */
code = krb5_cc_resolve(ctx, ccname, &tgt_ccache);
if (code) {
goto out_cc;
}
- if (lkrb5_cc_check_tgt_princ(ctx, tgt_ccache, princ)) {
- logmsg(LL_WARN, "cc principal is not valid\n");
+ if (lkrb5_cc_check_tgt_princ(ctx, tgt_ccache, princ, flag))
goto out_princ;
- }
/*
* find a valid entry
return rc;
}
+/**
+ * find out whether current TGT cache is valid or not
+ */
+static
+int lkrb5_check_root_tgt_cc(krb5_context ctx,
+ krb5_ccache ccache,
+ unsigned int root_flags)
+{
+ struct stat statbuf;
+ unsigned int flag;
+ char ccname[1024];
+ char *ccfile;
+ int i, rc;
+
+ for (i = 0; i < LGSS_ROOT_CRED_NR; i++) {
+ flag = 1 << i;
+
+ if ((root_flags & flag) == 0)
+ continue;
+
+ get_root_tgt_ccname(ccname, sizeof(ccname), flag);
+ logmsg(LL_DEBUG, "root krb5 TGT ccname: %s\n", ccname);
+
+ /* currently we only support type "FILE", firstly make sure
+ * the cache file is there */
+ ccfile = ccname + strlen(krb5_cc_type);
+ if (stat(ccfile, &statbuf)) {
+ logmsg(LL_DEBUG, "krb5 cc %s: %s\n",
+ ccname, strerror(errno));
+ continue;
+ }
+
+ rc = lkrb5_check_root_tgt_cc_base(ctx, ccache, ccname, flag);
+ if (rc == 0)
+ return 0;
+ }
+
+ logmsg(LL_TRACE, "doesn't find a valid tgt cc\n");
+ return -1;
+}
+
static
int lkrb5_get_root_tgt_keytab(krb5_context ctx,
krb5_ccache ccache,
static
int lkrb5_refresh_root_tgt_cc(krb5_context ctx,
krb5_ccache ccache,
- const char *ccname)
+ unsigned int root_flags)
{
krb5_keytab kt;
krb5_keytab_entry kte;
krb5_kt_cursor cursor;
- krb5_principal princ = NULL, princ2;
+ krb5_principal princ = NULL;
krb5_error_code code;
- int general_root = 0;
+ char ccname[1024];
+ unsigned int flag = 0;
int rc = -1;
/* prepare parsing the keytab file */
goto out_kt;
}
- /* iterate keytab to find proper a entry */
+ /* iterate keytab to find proper an entry */
do {
+ krb5_data *princname;
+
code = krb5_kt_next_entry(ctx, kt, &kte, &cursor);
if (code != 0)
break;
if (!princ_is_local_realm(ctx, kte.principal))
continue;
- /* lustre_root[/host]@realm */
- if (lgss_krb5_strcmp(krb5_princ_name(ctx, kte.principal),
- LGSS_USR_ROOT_STR) == 0) {
- int tmp_general_root = 0;
-
- if (krb5_princ_component(ctx, kte.principal,1) == NULL){
- if (princ != NULL) {
- logmsg(LL_TRACE, "lustre_root: "
- "already picked one, skip\n");
- continue;
- }
-
- tmp_general_root = 1;
- } else {
- if (svc_princ_verify_host(ctx, kte.principal,
- LL_TRACE)) {
- logmsg(LL_TRACE, "lustre_root: "
- "doesn't belong to this node\n");
- continue;
- }
-
- if (princ != NULL && !general_root) {
- logmsg(LL_TRACE, "lustre_root: already "
- "have a host-specific one, "
- "skip\n");
- continue;
- }
- }
-
- code = krb5_copy_principal(ctx, kte.principal, &princ2);
- if (code) {
- logmsg(LL_ERR, "copy lustre_root princ: %s\n",
- krb5_err_msg(code));
- continue;
- }
-
- if (princ != NULL) {
- logmsg(LL_TRACE, "release a lustre_root one\n");
- krb5_free_principal(ctx, princ);
- }
- princ = princ2;
-
- general_root = tmp_general_root;
+ princname = krb5_princ_name(ctx, kte.principal);
+
+ if ((root_flags & LGSS_ROOT_CRED_ROOT) != 0 &&
+ lgss_krb5_strcmp(princname, LGSS_USR_ROOT_STR) == 0) {
+ flag = LGSS_ROOT_CRED_ROOT;
+ } else if ((root_flags & LGSS_ROOT_CRED_MDT) != 0 &&
+ lgss_krb5_strcmp(princname, LGSS_SVC_MDS_STR) == 0) {
+ flag = LGSS_ROOT_CRED_MDT;
+ } else if ((root_flags & LGSS_ROOT_CRED_OST) != 0 &&
+ lgss_krb5_strcmp(princname, LGSS_SVC_OSS_STR) == 0) {
+ flag = LGSS_ROOT_CRED_OST;
+ } else {
+ logmsg(LL_TRACE, "not what we want, skip\n");
continue;
}
- /* lustre_mds/host@realm */
- if (lgss_krb5_strcmp(krb5_princ_name(ctx, kte.principal),
- LGSS_SVC_MDS_STR) == 0) {
- if (svc_princ_verify_host(ctx, kte.principal,
- LL_TRACE)) {
- logmsg(LL_TRACE, "mds service principal: "
- "doesn't belong to this node\n");
+ if (krb5_princ_component(ctx, kte.principal, 1) == NULL) {
+ if (flag != LGSS_ROOT_CRED_ROOT) {
+ logmsg(LL_TRACE, "no hostname, skip\n");
continue;
}
-
- /* select this one */
- code = krb5_copy_principal(ctx, kte.principal, &princ2);
- if (code) {
- logmsg(LL_ERR, "copy lustre_mds princ: %s\n",
- krb5_err_msg(code));
+ } else {
+ if (svc_princ_verify_host(ctx, kte.principal,
+ LL_TRACE)) {
+ logmsg(LL_TRACE, "doesn't belong to this "
+ "node, skip\n");
continue;
}
+ }
- if (princ != NULL) {
- logmsg(LL_TRACE, "release a lustre_root one\n");
- krb5_free_principal(ctx, princ);
- }
- princ = princ2;
- break;
+ code = krb5_copy_principal(ctx, kte.principal, &princ);
+ if (code) {
+ logmsg(LL_ERR, "copy princ: %s\n", krb5_err_msg(code));
+ continue;
}
+
+ lassert(princ != NULL);
+ break;
} while (1);
krb5_kt_end_seq_get(ctx, kt, &cursor);
}
/* obtain root TGT */
+ get_root_tgt_ccname(ccname, sizeof(ccname), flag);
rc = lkrb5_get_root_tgt_keytab(ctx, ccache, kt, princ, ccname);
krb5_free_principal(ctx, princ);
krb5_ccache ccache;
krb5_error_code code;
struct lgss_krb5_cred *kcred;
- char tgtcc[1024];
int rc = -1;
lassert(krb5_this_realm != NULL);
kcred = (struct lgss_krb5_cred *) cred->lc_mech_cred;
- /* compose the TGT cc name */
- snprintf(tgtcc, sizeof(tgtcc), "%s%s/%s%s_%s",
- krb5_cc_type, krb5_cc_dir, krb5_cred_prefix,
- krb5_cred_root_suffix, krb5_this_realm);
- logmsg(LL_DEBUG, "root krb5 TGT ccname: %s\n", tgtcc);
-
/* compose the memory cc name, since the only user is myself,
- * the name could be fixed
- */
+ * the name could be fixed */
snprintf(kcred->kc_ccname, sizeof(kcred->kc_ccname),
"%s/self", krb5_cc_type_mem);
logmsg(LL_TRACE, "private cc: %s\n", kcred->kc_ccname);
*/
lgss_krb5_mutex_lock();
- rc = lkrb5_check_root_tgt_cc(ctx, ccache, tgtcc);
+ rc = lkrb5_check_root_tgt_cc(ctx, ccache, cred->lc_root_flags);
if (rc != 0)
- rc = lkrb5_refresh_root_tgt_cc(ctx, ccache, tgtcc);
+ rc = lkrb5_refresh_root_tgt_cc(ctx, ccache,
+ cred->lc_root_flags);
if (rc == 0)
rc = lgss_krb5_set_ccache_name(kcred->kc_ccname);
kcred->kc_remove = 0;
cred->lc_mech_cred = kcred;
- if (cred->lc_fl_root || cred->lc_fl_mds) {
+ if (cred->lc_root_flags != 0) {
if (lgss_krb5_get_local_realm())
return -1;
git://git.whamcloud.com / fs / lustre-release.git / blobdiff