1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Modifications for Lustre
5 * Copyright 2004, Cluster File Systems, Inc.
7 * Author: Eric Mei <ericm@clusterfs.com>
11 * linux/net/sunrpc/auth_gss.c
13 * RPCSEC_GSS client authentication.
15 * Copyright (c) 2000 The Regents of the University of Michigan.
16 * All rights reserved.
18 * Dug Song <dugsong@monkey.org>
19 * Andy Adamson <andros@umich.edu>
21 * Redistribution and use in source and binary forms, with or without
22 * modification, are permitted provided that the following conditions
25 * 1. Redistributions of source code must retain the above copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. Neither the name of the University nor the names of its
31 * contributors may be used to endorse or promote products derived
32 * from this software without specific prior written permission.
34 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
35 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
36 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
37 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
38 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
39 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
40 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
41 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
42 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
43 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
44 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
49 # define EXPORT_SYMTAB
51 #define DEBUG_SUBSYSTEM S_SEC
53 #include <linux/init.h>
54 #include <linux/module.h>
55 #include <linux/slab.h>
56 #include <linux/dcache.h>
58 #include <linux/random.h>
61 #include <linux/sunrpc/rpc_pipe_fs.h>
63 #include <liblustre.h>
66 #include <libcfs/kp30.h>
67 #include <linux/obd.h>
68 #include <linux/obd_class.h>
69 #include <linux/obd_support.h>
70 #include <linux/lustre_idl.h>
71 #include <linux/lustre_net.h>
72 #include <linux/lustre_import.h>
73 #include <linux/lustre_sec.h>
76 #include "gss_internal.h"
79 #define GSS_CREDCACHE_EXPIRE (60) /* 1 minute */
80 #define GSS_CRED_EXPIRE (8 * 60 * 60) /* 8 hours */
81 #define GSS_CRED_SIGN_SIZE (1024)
82 #define GSS_CRED_VERIFY_SIZE (56)
84 #define LUSTRE_PIPEDIR "/lustre"
86 /**********************************************
87 * gss security init/fini helper *
88 **********************************************/
90 #define SECINIT_RPC_TIMEOUT (10)
91 #define SECFINI_RPC_TIMEOUT (10)
93 static int secinit_compose_request(struct obd_import *imp,
94 char *buf, int bufsize,
99 struct ptlrpcs_wire_hdr *hdr;
100 struct lustre_msg *lmsg;
101 struct mds_req_sec_desc *secdesc;
102 int size = sizeof(*secdesc);
106 lmsg_size = lustre_msg_size(1, &size);
108 if (sizeof(*hdr) + lmsg_size + size_round(token_size) > bufsize) {
109 CERROR("token size %ld too large\n", token_size);
113 /* security wire hdr */
114 hdr = buf_to_sec_hdr(buf);
115 hdr->flavor = cpu_to_le32(PTLRPC_SEC_GSS);
116 hdr->sectype = cpu_to_le32(PTLRPC_SEC_TYPE_NONE);
117 hdr->msg_len = cpu_to_le32(lmsg_size);
118 hdr->sec_len = cpu_to_le32(7 * 4 + token_size);
120 /* lustre message & secdesc */
121 lmsg = buf_to_lustre_msg(buf);
123 lustre_init_msg(lmsg, 1, &size, NULL);
124 secdesc = lustre_msg_buf(lmsg, 0, size);
125 secdesc->rsd_uid = secdesc->rsd_fsuid = uid;
126 secdesc->rsd_gid = secdesc->rsd_fsgid = gid;
127 secdesc->rsd_cap = secdesc->rsd_ngroups = 0;
129 lmsg->handle = imp->imp_remote_handle;
130 lmsg->type = PTL_RPC_MSG_REQUEST;
131 lmsg->opc = SEC_INIT;
133 lmsg->conn_cnt = imp->imp_conn_cnt;
135 p = (__u32 *) (buf + sizeof(*hdr) + lmsg_size);
138 *p++ = cpu_to_le32(PTLRPC_SEC_GSS_VERSION); /* gss version */
139 *p++ = cpu_to_le32(PTLRPC_SEC_GSS_KRB5I); /* subflavor */
140 *p++ = cpu_to_le32(PTLRPC_GSS_PROC_INIT); /* proc */
141 *p++ = cpu_to_le32(0); /* seq */
142 *p++ = cpu_to_le32(PTLRPC_GSS_SVC_NONE); /* service */
143 *p++ = cpu_to_le32(0); /* context handle */
145 /* now the token part */
146 *p++ = cpu_to_le32((__u32) token_size);
147 LASSERT(((char *)p - buf) + token_size <= bufsize);
149 rc = copy_from_user(p, token, token_size);
151 CERROR("can't copy token\n");
155 rc = size_round(((char *)p - buf) + token_size);
159 static int secinit_parse_reply(char *repbuf, int replen,
160 char __user *outbuf, long outlen)
162 __u32 *p = (__u32 *)repbuf;
163 struct ptlrpcs_wire_hdr *hdr = (struct ptlrpcs_wire_hdr *) repbuf;
164 __u32 lmsg_len, sec_len, status;
165 __u32 major, minor, seq, obj_len, round_len;
168 if (replen <= (4 + 6) * 4) {
169 CERROR("reply size %d too small\n", replen);
173 hdr->flavor = le32_to_cpu(hdr->flavor);
174 hdr->sectype = le32_to_cpu(hdr->sectype);
175 hdr->msg_len = le32_to_cpu(hdr->msg_len);
176 hdr->sec_len = le32_to_cpu(hdr->sec_len);
178 lmsg_len = le32_to_cpu(p[2]);
179 sec_len = le32_to_cpu(p[3]);
182 if (hdr->flavor != PTLRPC_SEC_GSS ||
183 hdr->sectype != PTLRPC_SEC_TYPE_NONE) {
184 CERROR("unexpected reply\n");
187 if (hdr->msg_len % 8 ||
188 sizeof(*hdr) + hdr->msg_len + hdr->sec_len > replen) {
189 CERROR("unexpected reply\n");
192 if (hdr->sec_len > outlen) {
193 CERROR("outbuf too small\n");
197 p = (__u32 *) buf_to_sec_data(repbuf);
200 status = le32_to_cpu(*p++);
201 major = le32_to_cpu(*p++);
202 minor = le32_to_cpu(*p++);
203 seq = le32_to_cpu(*p++);
206 if (copy_to_user(outbuf, &status, 4))
209 if (copy_to_user(outbuf, &major, 4))
212 if (copy_to_user(outbuf, &minor, 4))
215 if (copy_to_user(outbuf, &seq, 4))
219 obj_len = le32_to_cpu(*p++);
220 round_len = (obj_len + 3) & ~ 3;
221 if (copy_to_user(outbuf, &obj_len, 4))
224 if (copy_to_user(outbuf, (char *)p, round_len))
228 effective += 4 + round_len;
230 obj_len = le32_to_cpu(*p++);
231 round_len = (obj_len + 3) & ~ 3;
232 if (copy_to_user(outbuf, &obj_len, 4))
235 if (copy_to_user(outbuf, (char *)p, round_len))
239 effective += 4 + round_len;
244 /* XXX move to where lgssd could see */
245 struct lgssd_ioctl_param {
246 int version; /* in */
250 long send_token_size;/* in */
251 char *send_token; /* in */
252 long reply_buf_size; /* in */
253 char *reply_buf; /* in */
254 long status; /* out */
255 long reply_length; /* out */
258 static int gss_send_secinit_rpc(__user char *buffer, unsigned long count)
260 struct obd_import *imp;
261 struct lgssd_ioctl_param param;
262 const int reqbuf_size = 1024;
263 const int repbuf_size = 1024;
264 char *reqbuf, *repbuf;
265 struct obd_device *obd;
268 int rc, reqlen, replen;
270 if (count != sizeof(param)) {
271 CERROR("partial write\n");
274 if (copy_from_user(¶m, buffer, sizeof(param)))
277 if (param.version != GSSD_INTERFACE_VERSION) {
278 CERROR("gssd interface version %d (expect %d)\n",
279 param.version, GSSD_INTERFACE_VERSION);
284 if (strncpy_from_user(obdname, param.uuid,
285 sizeof(obdname)) <= 0) {
286 CERROR("Invalid obdname pointer\n");
290 obd = class_name2obd(obdname);
292 CERROR("no such obd %s\n", obdname);
295 if (strcmp(obd->obd_type->typ_name, "mdc") &&
296 strcmp(obd->obd_type->typ_name, "osc")) {
297 CERROR("%s not a mdc/osc device\n", obdname);
301 imp = class_import_get(obd->u.cli.cl_import);
303 OBD_ALLOC(reqbuf, reqbuf_size);
304 OBD_ALLOC(repbuf, reqbuf_size);
306 if (!reqbuf || !repbuf) {
307 CERROR("Can't alloc buffer: %p/%p\n", reqbuf, repbuf);
308 param.status = -ENOMEM;
313 reqlen = secinit_compose_request(imp, reqbuf, reqbuf_size,
314 param.uid, param.gid,
315 param.send_token_size,
318 param.status = reqlen;
322 replen = repbuf_size;
323 rc = ptlrpc_do_rawrpc(imp, reqbuf, reqlen,
324 repbuf, &replen, SECINIT_RPC_TIMEOUT);
330 if (replen > param.reply_buf_size) {
331 CERROR("output buffer size %ld too small, need %d\n",
332 param.reply_buf_size, replen);
333 param.status = -EINVAL;
337 lsize = secinit_parse_reply(repbuf, replen,
338 param.reply_buf, param.reply_buf_size);
340 param.status = (int) lsize;
345 param.reply_length = lsize;
348 if (copy_to_user(buffer, ¶m, sizeof(param)))
353 class_import_put(imp);
355 OBD_FREE(repbuf, repbuf_size);
357 OBD_FREE(reqbuf, reqbuf_size);
361 static int gss_send_secfini_rpc(struct obd_import *imp,
362 char *reqbuf, int reqlen)
364 const int repbuf_size = 1024;
366 int replen = repbuf_size;
369 OBD_ALLOC(repbuf, repbuf_size);
371 CERROR("Out of memory\n");
375 rc = ptlrpc_do_rawrpc(imp, reqbuf, reqlen, repbuf, &replen,
376 SECFINI_RPC_TIMEOUT);
378 OBD_FREE(repbuf, repbuf_size);
382 /**********************************************
383 * structure definitions *
384 **********************************************/
386 struct ptlrpc_sec gs_base;
387 struct gss_api_mech *gs_mech;
390 struct list_head gs_upcalls;
392 struct dentry *gs_depipe;
398 static rwlock_t gss_ctx_lock = RW_LOCK_UNLOCKED;
400 struct gss_upcall_msg_data {
408 struct gss_upcall_msg {
409 struct rpc_pipe_msg gum_base;
410 atomic_t gum_refcount;
411 struct list_head gum_list;
412 struct gss_sec *gum_gsec;
413 wait_queue_head_t gum_waitq;
414 char gum_obdname[64];
415 struct gss_upcall_msg_data gum_data;
418 /**********************************************
419 * rpc_pipe upcall helpers *
420 **********************************************/
422 void gss_release_msg(struct gss_upcall_msg *gmsg)
425 LASSERT(atomic_read(&gmsg->gum_refcount) > 0);
427 if (!atomic_dec_and_test(&gmsg->gum_refcount)) {
428 CDEBUG(D_SEC, "gmsg %p ref %d\n", gmsg,
429 atomic_read(&gmsg->gum_refcount));
433 LASSERT(list_empty(&gmsg->gum_list));
434 LASSERT(list_empty(&gmsg->gum_base.list));
435 OBD_FREE(gmsg, sizeof(*gmsg));
440 gss_unhash_msg_nolock(struct gss_upcall_msg *gmsg)
443 if (list_empty(&gmsg->gum_list)) {
448 list_del_init(&gmsg->gum_list);
449 wake_up(&gmsg->gum_waitq);
450 atomic_dec(&gmsg->gum_refcount);
451 CDEBUG(D_SEC, "gmsg %p refcount now %d\n",
452 gmsg, atomic_read(&gmsg->gum_refcount));
453 LASSERT(atomic_read(&gmsg->gum_refcount) > 0);
458 gss_unhash_msg(struct gss_upcall_msg *gmsg)
460 struct gss_sec *gsec = gmsg->gum_gsec;
462 spin_lock(&gsec->gs_lock);
463 gss_unhash_msg_nolock(gmsg);
464 spin_unlock(&gsec->gs_lock);
468 struct gss_upcall_msg * gss_find_upcall(struct gss_sec *gsec,
470 struct gss_upcall_msg_data *gmd)
472 struct gss_upcall_msg *gmsg;
475 list_for_each_entry(gmsg, &gsec->gs_upcalls, gum_list) {
476 if (memcmp(&gmsg->gum_data, gmd, sizeof(*gmd)))
478 if (strcmp(gmsg->gum_obdname, obdname))
480 atomic_inc(&gmsg->gum_refcount);
481 CDEBUG(D_SEC, "found gmsg at %p: obdname %s, uid %d, ref %d\n",
482 gmsg, obdname, gmd->gum_uid,
483 atomic_read(&gmsg->gum_refcount));
489 static void gss_init_upcall_msg(struct gss_upcall_msg *gmsg,
490 struct gss_sec *gsec, char *obdname,
491 struct gss_upcall_msg_data *gmd)
493 struct rpc_pipe_msg *rpcmsg;
496 /* 2 refs: 1 for hash, 1 for current user */
497 init_waitqueue_head(&gmsg->gum_waitq);
498 list_add(&gmsg->gum_list, &gsec->gs_upcalls);
499 atomic_set(&gmsg->gum_refcount, 2);
500 gmsg->gum_gsec = gsec;
501 strncpy(gmsg->gum_obdname, obdname, sizeof(gmsg->gum_obdname));
502 memcpy(&gmsg->gum_data, gmd, sizeof(*gmd));
504 rpcmsg = &gmsg->gum_base;
505 rpcmsg->data = &gmsg->gum_data;
506 rpcmsg->len = sizeof(gmsg->gum_data);
509 #endif /* __KERNEL__ */
511 /********************************************
512 * gss cred manipulation helpers *
513 ********************************************/
515 int gss_cred_is_uptodate_ctx(struct ptlrpc_cred *cred)
517 struct gss_cred *gcred = container_of(cred, struct gss_cred, gc_base);
520 read_lock(&gss_ctx_lock);
521 if ((cred->pc_flags & PTLRPC_CRED_UPTODATE) && gcred->gc_ctx)
523 read_unlock(&gss_ctx_lock);
528 struct gss_cl_ctx * gss_get_ctx(struct gss_cl_ctx *ctx)
530 atomic_inc(&ctx->gc_refcount);
535 void gss_destroy_ctx(struct gss_cl_ctx *ctx)
539 CDEBUG(D_SEC, "destroy cl_ctx %p\n", ctx);
541 kgss_delete_sec_context(&ctx->gc_gss_ctx);
543 if (ctx->gc_wire_ctx.len > 0) {
544 OBD_FREE(ctx->gc_wire_ctx.data, ctx->gc_wire_ctx.len);
545 ctx->gc_wire_ctx.len = 0;
548 OBD_FREE(ctx, sizeof(*ctx));
552 void gss_put_ctx(struct gss_cl_ctx *ctx)
554 if (atomic_dec_and_test(&ctx->gc_refcount))
555 gss_destroy_ctx(ctx);
559 struct gss_cl_ctx *gss_cred_get_ctx(struct ptlrpc_cred *cred)
561 struct gss_cred *gcred = container_of(cred, struct gss_cred, gc_base);
562 struct gss_cl_ctx *ctx = NULL;
564 read_lock(&gss_ctx_lock);
566 ctx = gss_get_ctx(gcred->gc_ctx);
567 read_unlock(&gss_ctx_lock);
572 void gss_cred_set_ctx(struct ptlrpc_cred *cred, struct gss_cl_ctx *ctx)
574 struct gss_cred *gcred = container_of(cred, struct gss_cred, gc_base);
575 struct gss_cl_ctx *old;
579 if (kgss_inquire_context(ctx->gc_gss_ctx, &ctx_expiry)) {
580 CERROR("unable to get expire time\n");
581 ctx_expiry = 1; /* make it expired now */
583 cred->pc_expire = (unsigned long) ctx_expiry;
585 write_lock(&gss_ctx_lock);
588 cred->pc_flags |= PTLRPC_CRED_UPTODATE;
589 write_unlock(&gss_ctx_lock);
593 CDEBUG(D_SEC, "client refreshed gss cred %p(uid %u)\n",
599 simple_get_bytes(char **buf, __u32 *buflen, void *res, __u32 reslen)
601 if (*buflen < reslen) {
602 CERROR("buflen %u < %u\n", *buflen, reslen);
606 memcpy(res, *buf, reslen);
616 * - wire_ctx (rawobj)
617 * - mech_ctx? (rawobj)
620 int gss_parse_init_downcall(struct gss_api_mech *gm, rawobj_t *buf,
621 struct gss_cl_ctx **gc,
622 struct gss_upcall_msg_data *gmd, int *gss_err)
624 char *p = (char *)buf->data;
625 struct gss_cl_ctx *ctx;
626 __u32 len = buf->len;
627 unsigned int timeout;
635 OBD_ALLOC(ctx, sizeof(*ctx));
639 ctx->gc_proc = RPC_GSS_PROC_DATA;
641 spin_lock_init(&ctx->gc_seq_lock);
642 atomic_set(&ctx->gc_refcount,1);
644 if (simple_get_bytes(&p, &len, &gmd->gum_uid, sizeof(gmd->gum_uid)))
646 if (simple_get_bytes(&p, &len, &gmd->gum_svc, sizeof(gmd->gum_svc)))
648 if (simple_get_bytes(&p, &len, &gmd->gum_nal, sizeof(gmd->gum_nal)))
650 if (simple_get_bytes(&p, &len, &gmd->gum_netid, sizeof(gmd->gum_netid)))
652 if (simple_get_bytes(&p, &len, &gmd->gum_nid, sizeof(gmd->gum_nid)))
654 /* FIXME: discarded timeout for now */
655 if (simple_get_bytes(&p, &len, &timeout, sizeof(timeout)))
657 if (simple_get_bytes(&p, &len, &ctx->gc_win, sizeof(ctx->gc_win)))
660 /* lgssd signals an error by passing ctx->gc_win = 0: */
662 /* in which case the next 2 int are:
666 if (simple_get_bytes(&p, &len, &err, sizeof(err))) {
670 if (simple_get_bytes(&p, &len, gss_err, sizeof(*gss_err))) {
674 if (err == 0 && *gss_err == 0) {
675 CERROR("no error passed from downcall\n");
681 if (rawobj_extract_local(&tmp_buf, (__u32 **) ((void *)&p), &len))
683 if (rawobj_dup(&ctx->gc_wire_ctx, &tmp_buf)) {
687 if (rawobj_extract_local(&tmp_buf, (__u32 **) ((void *)&p), &len))
688 goto err_free_wire_ctx;
690 CERROR("unexpected trailing %u bytes\n", len);
691 goto err_free_wire_ctx;
693 if (kgss_import_sec_context(&tmp_buf, gm, &ctx->gc_gss_ctx))
694 goto err_free_wire_ctx;
700 if (ctx->gc_wire_ctx.data)
701 OBD_FREE(ctx->gc_wire_ctx.data, ctx->gc_wire_ctx.len);
703 OBD_FREE(ctx, sizeof(*ctx));
704 CDEBUG(D_SEC, "err_code %d, gss code %d\n", err, *gss_err);
708 /***************************************
710 ***************************************/
712 #define CRED_REFRESH_UPCALL_TIMEOUT (20)
713 static int gss_cred_refresh(struct ptlrpc_cred *cred)
715 struct obd_import *import;
716 struct gss_sec *gsec;
717 struct gss_upcall_msg *gss_msg, *gss_new;
718 struct gss_upcall_msg_data gmd;
719 struct dentry *dentry;
720 char *obdname, *obdtype;
722 uid_t uid = cred->pc_uid;
726 if (ptlrpcs_cred_is_uptodate(cred))
729 LASSERT(cred->pc_sec);
730 LASSERT(cred->pc_sec->ps_import);
731 LASSERT(cred->pc_sec->ps_import->imp_obd);
733 import = cred->pc_sec->ps_import;
734 if (!import->imp_connection) {
735 CERROR("import has no connection set\n");
740 gmd.gum_nal = import->imp_connection->c_peer.peer_ni->pni_number;
742 gmd.gum_nid = import->imp_connection->c_peer.peer_id.nid;
744 obdtype = import->imp_obd->obd_type->typ_name;
745 if (!strcmp(obdtype, "mdc"))
747 else if (!strcmp(obdtype, "osc"))
750 CERROR("gss on %s?\n", obdtype);
754 gsec = container_of(cred->pc_sec, struct gss_sec, gs_base);
755 obdname = import->imp_obd->obd_name;
756 dentry = gsec->gs_depipe;
760 CDEBUG(D_SEC, "Initiate gss context %p(%u@%s)\n",
761 container_of(cred, struct gss_cred, gc_base),
762 uid, import->imp_target_uuid.uuid);
765 spin_lock(&gsec->gs_lock);
766 gss_msg = gss_find_upcall(gsec, obdname, &gmd);
769 OBD_FREE(gss_new, sizeof(*gss_new));
776 spin_unlock(&gsec->gs_lock);
777 OBD_ALLOC(gss_new, sizeof(*gss_new));
782 /* so far we'v created gss_new */
783 gss_init_upcall_msg(gss_new, gsec, obdname, &gmd);
785 if (gss_cred_is_uptodate_ctx(cred)) {
786 /* someone else had done it for us, simply cancel
788 CDEBUG(D_SEC, "cred("LPU64"/%u) has been refreshed by someone "
789 "else, simply drop our request\n",
790 cred->pc_pag, cred->pc_uid);
791 gss_unhash_msg_nolock(gss_new);
792 spin_unlock(&gsec->gs_lock);
793 gss_release_msg(gss_new);
797 /* need to make upcall now */
798 spin_unlock(&gsec->gs_lock);
799 res = rpc_queue_upcall(dentry->d_inode, &gss_new->gum_base);
801 CERROR("rpc_queue_upcall failed: %d\n", res);
802 gss_unhash_msg(gss_new);
803 gss_release_msg(gss_new);
804 cred->pc_flags |= PTLRPC_CRED_ERROR;
808 spin_lock(&gsec->gs_lock);
811 /* upcall might finish quickly */
812 if (list_empty(&gss_msg->gum_list)) {
813 spin_unlock(&gsec->gs_lock);
818 init_waitqueue_entry(&wait, current);
819 set_current_state(TASK_INTERRUPTIBLE);
820 add_wait_queue(&gss_msg->gum_waitq, &wait);
821 spin_unlock(&gsec->gs_lock);
823 res = schedule_timeout(CRED_REFRESH_UPCALL_TIMEOUT * HZ);
824 remove_wait_queue(&gss_msg->gum_waitq, &wait);
826 if (signal_pending(current)) {
827 CERROR("cred %p: interrupted upcall\n", cred);
829 cred->pc_flags |= PTLRPC_CRED_DEAD | PTLRPC_CRED_ERROR;
831 } else if (res == 0) {
832 CERROR("cred %p: upcall timedout\n", cred);
833 cred->pc_flags |= PTLRPC_CRED_DEAD | PTLRPC_CRED_ERROR;
839 gss_release_msg(gss_msg);
843 #else /* !__KERNEL__ */
844 extern int lgss_handle_krb5_upcall(uid_t uid, __u32 dest_ip,
846 char *buf, int bufsize,
847 int (*callback)(char*, unsigned long));
849 static int gss_cred_refresh(struct ptlrpc_cred *cred)
853 struct obd_import *imp;
854 struct gss_sec *gsec;
855 struct gss_api_mech *mech;
856 struct gss_cl_ctx *ctx = NULL;
857 struct vfs_cred vcred = { 0 };
864 LASSERT(cred->pc_sec);
865 LASSERT(cred->pc_sec->ps_import);
866 LASSERT(cred->pc_sec->ps_import->imp_obd);
868 if (ptlrpcs_cred_is_uptodate(cred))
871 imp = cred->pc_sec->ps_import;
872 peer_nid = imp->imp_connection->c_peer.peer_id.nid;
873 dest_ip = (__u32) (peer_nid & 0xFFFFFFFF);
874 subflavor = cred->pc_sec->ps_flavor.subflavor;
876 if (subflavor != PTLRPC_SEC_GSS_KRB5I) {
877 CERROR("unknown subflavor %u\n", subflavor);
878 GOTO(err_out, rc = -EINVAL);
881 rc = lgss_handle_krb5_upcall(cred->pc_uid, dest_ip,
882 imp->imp_obd->obd_name,
884 gss_send_secinit_rpc);
892 gsec = container_of(cred->pc_sec, struct gss_sec, gs_base);
893 mech = gsec->gs_mech;
895 rc = gss_parse_init_downcall(mech, &obj, &ctx, &vcred, &dest_ip,
898 CERROR("parse init downcall: rpc %d, gss 0x%x\n", rc, gss_err);
899 if (rc != -ERESTART || gss_err != 0)
900 cred->pc_flags |= PTLRPC_CRED_ERROR;
907 gss_cred_set_ctx(cred, ctx);
908 LASSERT(gss_cred_is_uptodate_ctx(cred));
912 cred->pc_flags |= PTLRPC_CRED_DEAD;
917 static int gss_cred_match(struct ptlrpc_cred *cred,
918 struct vfs_cred *vcred)
920 RETURN(cred->pc_pag == vcred->vc_pag);
923 static int gss_cred_sign(struct ptlrpc_cred *cred,
924 struct ptlrpc_request *req)
926 struct gss_cred *gcred;
927 struct gss_cl_ctx *ctx;
929 __u32 *vp, *vpsave, vlen, seclen;
930 __u32 seqnum, major, rc = 0;
933 LASSERT(req->rq_reqbuf);
934 LASSERT(req->rq_cred == cred);
936 gcred = container_of(cred, struct gss_cred, gc_base);
937 ctx = gss_cred_get_ctx(cred);
939 CERROR("cred %p("LPU64"/%u) invalidated?\n",
940 cred, cred->pc_pag, cred->pc_uid);
944 lmsg.len = req->rq_reqlen;
945 lmsg.data = (__u8 *) req->rq_reqmsg;
947 vp = (__u32 *) (lmsg.data + lmsg.len);
948 vlen = req->rq_reqbuf_len - sizeof(struct ptlrpcs_wire_hdr) -
952 if (vlen < 6 * 4 + size_round4(ctx->gc_wire_ctx.len)) {
953 CERROR("vlen %d, need %d\n",
954 vlen, 6 * 4 + size_round4(ctx->gc_wire_ctx.len));
959 spin_lock(&ctx->gc_seq_lock);
960 seqnum = ctx->gc_seq++;
961 spin_unlock(&ctx->gc_seq_lock);
963 *vp++ = cpu_to_le32(PTLRPC_SEC_GSS_VERSION); /* version */
964 *vp++ = cpu_to_le32(PTLRPC_SEC_GSS_KRB5I); /* subflavor */
965 *vp++ = cpu_to_le32(ctx->gc_proc); /* proc */
966 *vp++ = cpu_to_le32(seqnum); /* seq */
967 *vp++ = cpu_to_le32(PTLRPC_GSS_SVC_INTEGRITY); /* service */
970 if (rawobj_serialize(&ctx->gc_wire_ctx, &vp, &vlen)) {
974 CDEBUG(D_SEC, "encoded wire_ctx length %d\n", ctx->gc_wire_ctx.len);
976 vpsave = vp++; /* reserve for size */
980 mic.data = (unsigned char *)vp;
982 CDEBUG(D_SEC, "reqbuf at %p, lmsg at %p, len %d, mic at %p, len %d\n",
983 req->rq_reqbuf, lmsg.data, lmsg.len, mic.data, mic.len);
984 major = kgss_get_mic(ctx->gc_gss_ctx, GSS_C_QOP_DEFAULT, &lmsg, &mic);
986 CERROR("gss compute mic error, major %x\n", major);
991 *vpsave = cpu_to_le32(mic.len);
993 seclen = seclen - vlen + mic.len;
994 buf_to_sec_hdr(req->rq_reqbuf)->sec_len = cpu_to_le32(seclen);
995 req->rq_reqdata_len += size_round(seclen);
996 CDEBUG(D_SEC, "msg size %d, checksum size %d, total sec size %d\n",
997 lmsg.len, mic.len, seclen);
1003 static int gss_cred_verify(struct ptlrpc_cred *cred,
1004 struct ptlrpc_request *req)
1006 struct gss_cred *gcred;
1007 struct gss_cl_ctx *ctx;
1008 struct ptlrpcs_wire_hdr *sec_hdr;
1010 __u32 *vp, vlen, subflavor, proc, seq, svc;
1011 __u32 major, minor, rc;
1014 LASSERT(req->rq_repbuf);
1015 LASSERT(req->rq_cred == cred);
1017 sec_hdr = buf_to_sec_hdr(req->rq_repbuf);
1018 vp = (__u32 *) (req->rq_repbuf + sizeof(*sec_hdr) + sec_hdr->msg_len);
1019 vlen = sec_hdr->sec_len;
1022 CERROR("reply sec size %u too small\n", vlen);
1026 if (*vp++ != cpu_to_le32(PTLRPC_SEC_GSS_VERSION)) {
1027 CERROR("reply have different gss version\n");
1030 subflavor = le32_to_cpu(*vp++);
1031 proc = le32_to_cpu(*vp++);
1035 case PTLRPC_GSS_PROC_DATA:
1036 seq = le32_to_cpu(*vp++);
1037 svc = le32_to_cpu(*vp++);
1038 if (svc != PTLRPC_GSS_SVC_INTEGRITY) {
1039 CERROR("Unknown svc %d\n", svc);
1043 CERROR("Unexpected ctx handle\n");
1046 mic.len = le32_to_cpu(*vp++);
1048 if (vlen < mic.len) {
1049 CERROR("vlen %d, mic.len %d\n", vlen, mic.len);
1052 mic.data = (unsigned char *)vp;
1054 gcred = container_of(cred, struct gss_cred, gc_base);
1055 ctx = gss_cred_get_ctx(cred);
1058 lmsg.len = sec_hdr->msg_len;
1059 lmsg.data = (__u8 *) buf_to_lustre_msg(req->rq_repbuf);
1061 major = kgss_verify_mic(ctx->gc_gss_ctx, &lmsg, &mic, NULL);
1062 if (major != GSS_S_COMPLETE) {
1063 CERROR("gss verify mic error: major %x\n", major);
1064 GOTO(proc_data_out, rc = -EINVAL);
1067 req->rq_repmsg = (struct lustre_msg *) lmsg.data;
1068 req->rq_replen = lmsg.len;
1070 /* here we could check the seq number is the same one
1071 * we sent to server. but portals has prevent us from
1072 * replay attack, so maybe we don't need check it again.
1078 case PTLRPC_GSS_PROC_ERR:
1079 major = le32_to_cpu(*vp++);
1080 minor = le32_to_cpu(*vp++);
1081 /* server return NO_CONTEXT might be caused by context expire
1082 * or server reboot/failover. we refresh the cred transparently
1084 * In some cases, our gss handle is possible to be incidentally
1085 * identical to another handle since the handle itself is not
1086 * fully random. In krb5 case, the GSS_S_BAD_SIG will be
1087 * returned, maybe other gss error for other mechanism. Here we
1088 * only consider krb5 mech (FIXME) and try to establish new
1091 if (major == GSS_S_NO_CONTEXT ||
1092 major == GSS_S_BAD_SIG) {
1093 CWARN("req %p: server report cred %p %s, expired?\n",
1094 req, cred, (major == GSS_S_NO_CONTEXT) ?
1095 "NO_CONTEXT" : "BAD_SIG");
1097 ptlrpcs_cred_die(cred);
1098 rc = ptlrpcs_req_replace_dead_cred(req);
1100 req->rq_ptlrpcs_restart = 1;
1102 CERROR("replace dead cred failed %d\n", rc);
1104 CERROR("Unrecognized gss error (%x/%x)\n",
1110 CERROR("unknown gss proc %d\n", proc);
1117 static int gss_cred_seal(struct ptlrpc_cred *cred,
1118 struct ptlrpc_request *req)
1120 struct gss_cred *gcred;
1121 struct gss_cl_ctx *ctx;
1122 struct ptlrpcs_wire_hdr *sec_hdr;
1123 rawobj_buf_t msg_buf;
1124 rawobj_t cipher_buf;
1125 __u32 *vp, *vpsave, vlen, seclen;
1126 __u32 major, seqnum, rc = 0;
1129 LASSERT(req->rq_reqbuf);
1130 LASSERT(req->rq_cred == cred);
1132 gcred = container_of(cred, struct gss_cred, gc_base);
1133 ctx = gss_cred_get_ctx(cred);
1135 CERROR("cred %p("LPU64"/%u) invalidated?\n",
1136 cred, cred->pc_pag, cred->pc_uid);
1140 vp = (__u32 *) (req->rq_reqbuf + sizeof(*sec_hdr));
1141 vlen = req->rq_reqbuf_len - sizeof(*sec_hdr);
1144 if (vlen < 6 * 4 + size_round4(ctx->gc_wire_ctx.len)) {
1145 CERROR("vlen %d, need %d\n",
1146 vlen, 6 * 4 + size_round4(ctx->gc_wire_ctx.len));
1151 spin_lock(&ctx->gc_seq_lock);
1152 seqnum = ctx->gc_seq++;
1153 spin_unlock(&ctx->gc_seq_lock);
1155 *vp++ = cpu_to_le32(PTLRPC_SEC_GSS_VERSION); /* version */
1156 *vp++ = cpu_to_le32(PTLRPC_SEC_GSS_KRB5P); /* subflavor */
1157 *vp++ = cpu_to_le32(ctx->gc_proc); /* proc */
1158 *vp++ = cpu_to_le32(seqnum); /* seq */
1159 *vp++ = cpu_to_le32(PTLRPC_GSS_SVC_PRIVACY); /* service */
1162 if (rawobj_serialize(&ctx->gc_wire_ctx, &vp, &vlen)) {
1166 CDEBUG(D_SEC, "encoded wire_ctx length %d\n", ctx->gc_wire_ctx.len);
1168 vpsave = vp++; /* reserve for size */
1171 msg_buf.buf = (__u8 *) req->rq_reqmsg - GSS_PRIVBUF_PREFIX_LEN;
1172 msg_buf.buflen = req->rq_reqlen + GSS_PRIVBUF_PREFIX_LEN + GSS_PRIVBUF_SUFFIX_LEN;
1173 msg_buf.dataoff = GSS_PRIVBUF_PREFIX_LEN;
1174 msg_buf.datalen = req->rq_reqlen;
1176 cipher_buf.data = (__u8 *) vp;
1177 cipher_buf.len = vlen;
1179 major = kgss_wrap(ctx->gc_gss_ctx, GSS_C_QOP_DEFAULT,
1180 &msg_buf, &cipher_buf);
1182 CERROR("error wrap: major 0x%x\n", major);
1183 GOTO(out, rc = -EINVAL);
1186 *vpsave = cpu_to_le32(cipher_buf.len);
1188 seclen = seclen - vlen + cipher_buf.len;
1189 sec_hdr = buf_to_sec_hdr(req->rq_reqbuf);
1190 sec_hdr->sec_len = cpu_to_le32(seclen);
1191 req->rq_reqdata_len += size_round(seclen);
1193 CDEBUG(D_SEC, "msg size %d, total sec size %d\n",
1194 req->rq_reqlen, seclen);
1200 static int gss_cred_unseal(struct ptlrpc_cred *cred,
1201 struct ptlrpc_request *req)
1203 struct gss_cred *gcred;
1204 struct gss_cl_ctx *ctx;
1205 struct ptlrpcs_wire_hdr *sec_hdr;
1206 rawobj_t cipher_text, plain_text;
1207 __u32 *vp, vlen, subflavor, proc, seq, svc;
1211 LASSERT(req->rq_repbuf);
1212 LASSERT(req->rq_cred == cred);
1214 sec_hdr = buf_to_sec_hdr(req->rq_repbuf);
1215 if (sec_hdr->msg_len != 0) {
1216 CERROR("unexpected msg_len %u\n", sec_hdr->msg_len);
1220 vp = (__u32 *) (req->rq_repbuf + sizeof(*sec_hdr));
1221 vlen = sec_hdr->sec_len;
1224 CERROR("reply sec size %u too small\n", vlen);
1228 if (*vp++ != cpu_to_le32(PTLRPC_SEC_GSS_VERSION)) {
1229 CERROR("reply have different gss version\n");
1232 subflavor = le32_to_cpu(*vp++);
1233 proc = le32_to_cpu(*vp++);
1234 seq = le32_to_cpu(*vp++);
1235 svc = le32_to_cpu(*vp++);
1239 case PTLRPC_GSS_PROC_DATA:
1240 if (svc != PTLRPC_GSS_SVC_PRIVACY) {
1241 CERROR("Unknown svc %d\n", svc);
1245 CERROR("Unexpected ctx handle\n");
1250 cipher_text.len = le32_to_cpu(*vp++);
1251 cipher_text.data = (__u8 *) vp;
1254 if (vlen < cipher_text.len) {
1255 CERROR("cipher text to be %u while buf only %u\n",
1256 cipher_text.len, vlen);
1260 plain_text = cipher_text;
1262 gcred = container_of(cred, struct gss_cred, gc_base);
1263 ctx = gss_cred_get_ctx(cred);
1266 rc = kgss_unwrap(ctx->gc_gss_ctx, GSS_C_QOP_DEFAULT,
1267 &cipher_text, &plain_text);
1269 CERROR("error unwrap: 0x%x\n", rc);
1270 GOTO(proc_out, rc = -EINVAL);
1273 req->rq_repmsg = (struct lustre_msg *) vp;
1274 req->rq_replen = plain_text.len;
1281 CERROR("unknown gss proc %d\n", proc);
1288 static void destroy_gss_context(struct ptlrpc_cred *cred)
1290 struct ptlrpcs_wire_hdr *hdr;
1291 struct lustre_msg *lmsg;
1292 struct gss_cred *gcred;
1293 struct ptlrpc_request req;
1294 struct obd_import *imp;
1295 __u32 *vp, lmsg_size;
1298 /* cred's refcount is 0, steal one */
1299 atomic_inc(&cred->pc_refcount);
1301 gcred = container_of(cred, struct gss_cred, gc_base);
1302 gcred->gc_ctx->gc_proc = PTLRPC_GSS_PROC_DESTROY;
1303 imp = cred->pc_sec->ps_import;
1306 if (!(cred->pc_flags & PTLRPC_CRED_UPTODATE)) {
1307 CDEBUG(D_SEC, "Destroy a dead gss cred %p(%u@%s)\n",
1308 gcred, cred->pc_uid, imp->imp_target_uuid.uuid);
1309 atomic_dec(&cred->pc_refcount);
1314 CDEBUG(D_SEC, "client destroy gss cred %p(%u@%s)\n",
1315 gcred, cred->pc_uid, imp->imp_target_uuid.uuid);
1317 lmsg_size = lustre_msg_size(0, NULL);
1318 req.rq_reqbuf_len = sizeof(*hdr) + lmsg_size +
1319 ptlrpcs_est_req_payload(cred->pc_sec, lmsg_size);
1321 OBD_ALLOC(req.rq_reqbuf, req.rq_reqbuf_len);
1322 if (!req.rq_reqbuf) {
1323 CERROR("Fail to alloc reqbuf, cancel anyway\n");
1324 atomic_dec(&cred->pc_refcount);
1330 hdr = buf_to_sec_hdr(req.rq_reqbuf);
1331 hdr->flavor = cpu_to_le32(PTLRPC_SEC_GSS);
1332 hdr->sectype = cpu_to_le32(PTLRPC_SEC_TYPE_AUTH);
1333 hdr->msg_len = cpu_to_le32(lmsg_size);
1334 hdr->sec_len = cpu_to_le32(0);
1336 /* lustre message */
1337 lmsg = buf_to_lustre_msg(req.rq_reqbuf);
1338 lustre_init_msg(lmsg, 0, NULL, NULL);
1339 lmsg->handle = imp->imp_remote_handle;
1340 lmsg->type = PTL_RPC_MSG_REQUEST;
1341 lmsg->opc = SEC_FINI;
1343 lmsg->conn_cnt = imp->imp_conn_cnt;
1344 /* add this for randomize */
1345 get_random_bytes(&lmsg->last_xid, sizeof(lmsg->last_xid));
1346 get_random_bytes(&lmsg->transno, sizeof(lmsg->transno));
1348 vp = (__u32 *) req.rq_reqbuf;
1351 req.rq_reqmsg = buf_to_lustre_msg(req.rq_reqbuf);
1352 req.rq_reqlen = lmsg_size;
1353 req.rq_reqdata_len = sizeof(*hdr) + lmsg_size;
1355 if (gss_cred_sign(cred, &req)) {
1356 CERROR("failed to sign, cancel anyway\n");
1357 atomic_dec(&cred->pc_refcount);
1360 atomic_dec(&cred->pc_refcount);
1363 gss_send_secfini_rpc(imp, req.rq_reqbuf, req.rq_reqdata_len);
1365 OBD_FREE(req.rq_reqbuf, req.rq_reqbuf_len);
1369 static void gss_cred_destroy(struct ptlrpc_cred *cred)
1371 struct gss_cred *gcred;
1375 LASSERT(!atomic_read(&cred->pc_refcount));
1377 gcred = container_of(cred, struct gss_cred, gc_base);
1378 if (gcred->gc_ctx) {
1379 destroy_gss_context(cred);
1380 gss_put_ctx(gcred->gc_ctx);
1383 CDEBUG(D_SEC, "GSS_SEC: destroy cred %p\n", gcred);
1385 OBD_FREE(gcred, sizeof(*gcred));
1389 static struct ptlrpc_credops gss_credops = {
1390 .refresh = gss_cred_refresh,
1391 .match = gss_cred_match,
1392 .sign = gss_cred_sign,
1393 .verify = gss_cred_verify,
1394 .seal = gss_cred_seal,
1395 .unseal = gss_cred_unseal,
1396 .destroy = gss_cred_destroy,
1400 /*******************************************
1402 *******************************************/
1404 gss_pipe_upcall(struct file *filp, struct rpc_pipe_msg *msg,
1405 char *dst, size_t buflen)
1407 char *data = (char *)msg->data + msg->copied;
1408 ssize_t mlen = msg->len;
1414 left = copy_to_user(dst, data, mlen);
1420 msg->copied += mlen;
1426 gss_pipe_downcall(struct file *filp, const char *src, size_t mlen)
1429 const int bufsize = 1024;
1431 struct inode *inode = filp->f_dentry->d_inode;
1432 struct rpc_inode *rpci = RPC_I(inode);
1433 struct obd_import *import;
1434 struct ptlrpc_sec *sec;
1435 struct gss_sec *gsec;
1437 struct gss_api_mech *mech;
1438 struct vfs_cred vcred = { 0 };
1439 struct ptlrpc_cred *cred;
1440 struct gss_upcall_msg *gss_msg;
1441 struct gss_upcall_msg_data gmd = { 0 };
1442 struct gss_cl_ctx *ctx = NULL;
1447 if (mlen > bufsize) {
1448 CERROR("mlen %ld > bufsize %d\n", (long)mlen, bufsize);
1452 OBD_ALLOC(buf, bufsize);
1454 CERROR("alloc mem failed\n");
1458 left = copy_from_user(buf, src, mlen);
1460 GOTO(err_free, err = -EFAULT);
1462 obj.data = (unsigned char *)buf;
1465 LASSERT(rpci->private);
1466 gsec = (struct gss_sec *)rpci->private;
1467 sec = &gsec->gs_base;
1468 LASSERT(sec->ps_import);
1469 import = class_import_get(sec->ps_import);
1470 LASSERT(import->imp_obd);
1471 obdname = import->imp_obd->obd_name;
1472 mech = gsec->gs_mech;
1474 err = gss_parse_init_downcall(mech, &obj, &ctx, &gmd, &gss_err);
1476 CERROR("parse init downcall err %d\n", err);
1478 vcred.vc_uid = gmd.gum_uid;
1479 vcred.vc_pag = vcred.vc_uid; /* FIXME */
1481 cred = ptlrpcs_cred_lookup(sec, &vcred);
1483 CWARN("didn't find cred for uid %u\n", vcred.vc_uid);
1484 GOTO(err, err = -EINVAL);
1487 if (err || gss_err) {
1488 cred->pc_flags |= PTLRPC_CRED_DEAD;
1489 if (err != -ERESTART || gss_err != 0)
1490 cred->pc_flags |= PTLRPC_CRED_ERROR;
1491 CERROR("cred %p: rpc err %d, gss err 0x%x, fatal %d\n",
1493 ((cred->pc_flags & PTLRPC_CRED_ERROR) != 0));
1495 CDEBUG(D_SEC, "get initial ctx:\n");
1496 gss_cred_set_ctx(cred, ctx);
1499 spin_lock(&gsec->gs_lock);
1500 gss_msg = gss_find_upcall(gsec, obdname, &gmd);
1502 gss_unhash_msg_nolock(gss_msg);
1503 spin_unlock(&gsec->gs_lock);
1504 gss_release_msg(gss_msg);
1506 spin_unlock(&gsec->gs_lock);
1508 ptlrpcs_cred_put(cred, 1);
1509 class_import_put(import);
1510 OBD_FREE(buf, bufsize);
1514 gss_destroy_ctx(ctx);
1515 class_import_put(import);
1517 OBD_FREE(buf, bufsize);
1518 CDEBUG(D_SEC, "gss_pipe_downcall returning %d\n", err);
1523 void gss_pipe_destroy_msg(struct rpc_pipe_msg *msg)
1525 struct gss_upcall_msg *gmsg;
1526 static unsigned long ratelimit;
1529 if (msg->errno >= 0) {
1534 gmsg = container_of(msg, struct gss_upcall_msg, gum_base);
1535 CDEBUG(D_SEC, "destroy gmsg %p\n", gmsg);
1536 atomic_inc(&gmsg->gum_refcount);
1537 gss_unhash_msg(gmsg);
1538 if (msg->errno == -ETIMEDOUT || msg->errno == -EPIPE) {
1539 unsigned long now = get_seconds();
1540 if (time_after(now, ratelimit)) {
1541 CWARN("GSS_SEC upcall timed out.\n"
1542 "Please check user daemon is running!\n");
1543 ratelimit = now + 15;
1546 gss_release_msg(gmsg);
1551 void gss_pipe_release(struct inode *inode)
1553 struct rpc_inode *rpci = RPC_I(inode);
1554 struct ptlrpc_sec *sec;
1555 struct gss_sec *gsec;
1558 gsec = (struct gss_sec *)rpci->private;
1559 sec = &gsec->gs_base;
1560 spin_lock(&gsec->gs_lock);
1561 while (!list_empty(&gsec->gs_upcalls)) {
1562 struct gss_upcall_msg *gmsg;
1564 gmsg = list_entry(gsec->gs_upcalls.next,
1565 struct gss_upcall_msg, gum_list);
1566 gmsg->gum_base.errno = -EPIPE;
1567 atomic_inc(&gmsg->gum_refcount);
1568 gss_unhash_msg_nolock(gmsg);
1569 gss_release_msg(gmsg);
1571 spin_unlock(&gsec->gs_lock);
1575 static struct rpc_pipe_ops gss_upcall_ops = {
1576 .upcall = gss_pipe_upcall,
1577 .downcall = gss_pipe_downcall,
1578 .destroy_msg = gss_pipe_destroy_msg,
1579 .release_pipe = gss_pipe_release,
1581 #endif /* __KERNEL__ */
1583 /*********************************************
1584 * GSS security APIs *
1585 *********************************************/
1588 struct ptlrpc_sec* gss_create_sec(ptlrpcs_flavor_t *flavor,
1589 const char *pipe_dir,
1592 struct gss_sec *gsec;
1593 struct ptlrpc_sec *sec;
1600 LASSERT(flavor->flavor == PTLRPC_SEC_GSS);
1602 OBD_ALLOC(gsec, sizeof(*gsec));
1604 CERROR("can't alloc gsec\n");
1608 gsec->gs_mech = kgss_subflavor_to_mech(flavor->subflavor);
1609 if (!gsec->gs_mech) {
1610 CERROR("subflavor %d not found\n", flavor->subflavor);
1614 /* initialize gss sec */
1616 INIT_LIST_HEAD(&gsec->gs_upcalls);
1617 spin_lock_init(&gsec->gs_lock);
1619 pipepath_len = strlen(LUSTRE_PIPEDIR) + strlen(pipe_dir) +
1620 strlen(gsec->gs_mech->gm_name) + 3;
1621 OBD_ALLOC(gsec->gs_pipepath, pipepath_len);
1622 if (!gsec->gs_pipepath)
1625 sprintf(gsec->gs_pipepath, LUSTRE_PIPEDIR"/%s", pipe_dir);
1626 if (IS_ERR(rpc_mkdir(gsec->gs_pipepath, NULL))) {
1627 CERROR("can't make pipedir %s\n", gsec->gs_pipepath);
1631 sprintf(gsec->gs_pipepath, LUSTRE_PIPEDIR"/%s/%s", pipe_dir,
1632 gsec->gs_mech->gm_name);
1633 gsec->gs_depipe = rpc_mkpipe(gsec->gs_pipepath, gsec,
1634 &gss_upcall_ops, RPC_PIPE_WAIT_FOR_OPEN);
1635 if (IS_ERR(gsec->gs_depipe)) {
1636 CERROR("failed to make rpc_pipe %s: %ld\n",
1637 gsec->gs_pipepath, PTR_ERR(gsec->gs_depipe));
1640 CDEBUG(D_SEC, "gss sec %p, pipe path %s\n", gsec, gsec->gs_pipepath);
1643 sec = &gsec->gs_base;
1645 switch (flavor->subflavor) {
1646 case PTLRPC_SEC_GSS_KRB5I:
1647 sec->ps_sectype = PTLRPC_SEC_TYPE_AUTH;
1649 case PTLRPC_SEC_GSS_KRB5P:
1650 sec->ps_sectype = PTLRPC_SEC_TYPE_PRIV;
1656 sec->ps_expire = GSS_CREDCACHE_EXPIRE;
1657 sec->ps_nextgc = get_seconds() + sec->ps_expire;
1660 CDEBUG(D_SEC, "Create GSS security instance at %p(external %p)\n",
1666 pos = strrchr(gsec->gs_pipepath, '/');
1669 rpc_rmdir(gsec->gs_pipepath);
1671 OBD_FREE(gsec->gs_pipepath, pipepath_len);
1674 kgss_mech_put(gsec->gs_mech);
1676 OBD_FREE(gsec, sizeof(*gsec));
1681 void gss_destroy_sec(struct ptlrpc_sec *sec)
1683 struct gss_sec *gsec;
1690 gsec = container_of(sec, struct gss_sec, gs_base);
1691 CDEBUG(D_SEC, "Destroy GSS security instance at %p\n", gsec);
1693 LASSERT(gsec->gs_mech);
1694 LASSERT(!atomic_read(&sec->ps_refcount));
1695 LASSERT(!atomic_read(&sec->ps_credcount));
1697 pipepath_len = strlen(gsec->gs_pipepath) + 1;
1698 rpc_unlink(gsec->gs_pipepath);
1699 pos = strrchr(gsec->gs_pipepath, '/');
1702 rpc_rmdir(gsec->gs_pipepath);
1703 OBD_FREE(gsec->gs_pipepath, pipepath_len);
1706 kgss_mech_put(gsec->gs_mech);
1707 OBD_FREE(gsec, sizeof(*gsec));
1712 struct ptlrpc_cred * gss_create_cred(struct ptlrpc_sec *sec,
1713 struct vfs_cred *vcred)
1715 struct gss_cred *gcred;
1716 struct ptlrpc_cred *cred;
1719 OBD_ALLOC(gcred, sizeof(*gcred));
1723 cred = &gcred->gc_base;
1724 INIT_LIST_HEAD(&cred->pc_hash);
1725 atomic_set(&cred->pc_refcount, 0);
1727 cred->pc_ops = &gss_credops;
1728 cred->pc_expire = get_seconds() + GSS_CRED_EXPIRE;
1730 cred->pc_pag = vcred->vc_pag;
1731 cred->pc_uid = vcred->vc_uid;
1732 CDEBUG(D_SEC, "create a gss cred at %p("LPU64"/%u)\n",
1733 cred, vcred->vc_pag, vcred->vc_uid);
1738 static int gss_estimate_payload(struct ptlrpc_sec *sec, int msgsize)
1740 switch (sec->ps_sectype) {
1741 case PTLRPC_SEC_TYPE_AUTH:
1742 return GSS_MAX_AUTH_PAYLOAD;
1743 case PTLRPC_SEC_TYPE_PRIV:
1744 return size_round16(GSS_MAX_AUTH_PAYLOAD + msgsize +
1745 GSS_PRIVBUF_PREFIX_LEN +
1746 GSS_PRIVBUF_SUFFIX_LEN);
1753 static int gss_alloc_reqbuf(struct ptlrpc_sec *sec,
1754 struct ptlrpc_request *req,
1757 int msg_payload, sec_payload;
1761 /* In PRIVACY mode, lustre message is always 0 (already encoded into
1762 * security payload).
1764 privacy = sec->ps_sectype == PTLRPC_SEC_TYPE_PRIV;
1765 msg_payload = privacy ? 0 : lmsg_size;
1766 sec_payload = gss_estimate_payload(sec, lmsg_size);
1768 rc = sec_alloc_reqbuf(sec, req, msg_payload, sec_payload);
1773 int buflen = lmsg_size + GSS_PRIVBUF_PREFIX_LEN +
1774 GSS_PRIVBUF_SUFFIX_LEN;
1777 OBD_ALLOC(buf, buflen);
1779 CERROR("Fail to alloc %d\n", buflen);
1780 sec_free_reqbuf(sec, req);
1783 req->rq_reqmsg = (struct lustre_msg *)
1784 (buf + GSS_PRIVBUF_PREFIX_LEN);
1790 static void gss_free_reqbuf(struct ptlrpc_sec *sec,
1791 struct ptlrpc_request *req)
1797 LASSERT(req->rq_reqmsg);
1798 LASSERT(req->rq_reqlen);
1800 privacy = sec->ps_sectype == PTLRPC_SEC_TYPE_PRIV;
1802 buf = (char *) req->rq_reqmsg - GSS_PRIVBUF_PREFIX_LEN;
1803 LASSERT(buf < req->rq_reqbuf ||
1804 buf >= req->rq_reqbuf + req->rq_reqbuf_len);
1805 OBD_FREE(buf, req->rq_reqlen + GSS_PRIVBUF_PREFIX_LEN +
1806 GSS_PRIVBUF_SUFFIX_LEN);
1807 req->rq_reqmsg = NULL;
1810 sec_free_reqbuf(sec, req);
1813 static struct ptlrpc_secops gss_secops = {
1814 .create_sec = gss_create_sec,
1815 .destroy_sec = gss_destroy_sec,
1816 .create_cred = gss_create_cred,
1817 .est_req_payload = gss_estimate_payload,
1818 .est_rep_payload = gss_estimate_payload,
1819 .alloc_reqbuf = gss_alloc_reqbuf,
1820 .free_reqbuf = gss_free_reqbuf,
1823 static struct ptlrpc_sec_type gss_type = {
1824 .pst_owner = THIS_MODULE,
1825 .pst_name = "GSS_SEC",
1826 .pst_inst = ATOMIC_INIT(0),
1827 .pst_flavor = {PTLRPC_SEC_GSS, 0},
1828 .pst_ops = &gss_secops,
1832 (*lustre_secinit_downcall_handler)(char *buffer, unsigned long count);
1834 int __init ptlrpcs_gss_init(void)
1838 rc = ptlrpcs_register(&gss_type);
1845 rc = PTR_ERR(rpc_mkdir(LUSTRE_PIPEDIR, NULL));
1846 if (IS_ERR((void *)rc) && rc != -EEXIST) {
1847 CERROR("fail to make rpcpipedir for lustre\n");
1849 ptlrpcs_unregister(&gss_type);
1855 rc = init_kerberos_module();
1857 ptlrpcs_unregister(&gss_type);
1860 lustre_secinit_downcall_handler = gss_send_secinit_rpc;
1866 static void __exit ptlrpcs_gss_exit(void)
1868 lustre_secinit_downcall_handler = NULL;
1870 cleanup_kerberos_module();
1871 rpc_rmdir(LUSTRE_PIPEDIR);
1873 ptlrpcs_unregister(&gss_type);
1877 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
1878 MODULE_DESCRIPTION("GSS Security module for Lustre");
1879 MODULE_LICENSE("GPL");
1881 module_init(ptlrpcs_gss_init);
1882 module_exit(ptlrpcs_gss_exit);