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LU-4423 obdclass: use workqueue for zombie management
[fs/lustre-release.git] / lustre / ptlrpc / sec.c
index b6f7d07..5c44f89 100644 (file)
  *
  * You should have received a copy of the GNU General Public License
  * version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
+ * http://www.gnu.org/licenses/gpl-2.0.html
  *
  * GPL HEADER END
  */
@@ -27,7 +23,7 @@
  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
  *
- * Copyright (c) 2011, 2012, Intel Corporation.
+ * Copyright (c) 2011, 2017, Intel Corporation.
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
 
 #define DEBUG_SUBSYSTEM S_SEC
 
-#include <libcfs/libcfs.h>
-#ifndef __KERNEL__
-#include <liblustre.h>
-#include <libcfs/list.h>
-#else
+#include <linux/user_namespace.h>
+#ifdef HAVE_UIDGID_HEADER
+# include <linux/uidgid.h>
+#endif
 #include <linux/crypto.h>
 #include <linux/key.h>
-#endif
 
+#include <libcfs/libcfs.h>
 #include <obd.h>
 #include <obd_class.h>
 #include <obd_support.h>
@@ -118,50 +113,52 @@ static
 struct ptlrpc_sec_policy * sptlrpc_wireflavor2policy(__u32 flavor)
 {
        static DEFINE_MUTEX(load_mutex);
-        static cfs_atomic_t       loaded = CFS_ATOMIC_INIT(0);
-        struct ptlrpc_sec_policy *policy;
-        __u16                     number = SPTLRPC_FLVR_POLICY(flavor);
-        __u16                     flag = 0;
+       static atomic_t           loaded = ATOMIC_INIT(0);
+       struct ptlrpc_sec_policy *policy;
+       __u16                     number = SPTLRPC_FLVR_POLICY(flavor);
+       __u16                     flag = 0;
 
-        if (number >= SPTLRPC_POLICY_MAX)
-                return NULL;
+       if (number >= SPTLRPC_POLICY_MAX)
+               return NULL;
 
-        while (1) {
+       while (1) {
                read_lock(&policy_lock);
                policy = policies[number];
                if (policy && !try_module_get(policy->sp_owner))
                        policy = NULL;
                if (policy == NULL)
-                       flag = cfs_atomic_read(&loaded);
+                       flag = atomic_read(&loaded);
                read_unlock(&policy_lock);
 
-                if (policy != NULL || flag != 0 ||
-                    number != SPTLRPC_POLICY_GSS)
-                        break;
+               if (policy != NULL || flag != 0 ||
+                   number != SPTLRPC_POLICY_GSS)
+                       break;
 
-                /* try to load gss module, once */
+               /* try to load gss module, once */
                mutex_lock(&load_mutex);
-               if (cfs_atomic_read(&loaded) == 0) {
+               if (atomic_read(&loaded) == 0) {
                        if (request_module("ptlrpc_gss") == 0)
                                CDEBUG(D_SEC,
                                       "module ptlrpc_gss loaded on demand\n");
-                        else
-                                CERROR("Unable to load module ptlrpc_gss\n");
+                       else
+                               CERROR("Unable to load module ptlrpc_gss\n");
 
-                        cfs_atomic_set(&loaded, 1);
-                }
+                       atomic_set(&loaded, 1);
+               }
                mutex_unlock(&load_mutex);
-        }
+       }
 
-        return policy;
+       return policy;
 }
 
 __u32 sptlrpc_name2flavor_base(const char *name)
 {
-        if (!strcmp(name, "null"))
-                return SPTLRPC_FLVR_NULL;
-        if (!strcmp(name, "plain"))
-                return SPTLRPC_FLVR_PLAIN;
+       if (!strcmp(name, "null"))
+               return SPTLRPC_FLVR_NULL;
+       if (!strcmp(name, "plain"))
+               return SPTLRPC_FLVR_PLAIN;
+       if (!strcmp(name, "gssnull"))
+               return SPTLRPC_FLVR_GSSNULL;
         if (!strcmp(name, "krb5n"))
                 return SPTLRPC_FLVR_KRB5N;
         if (!strcmp(name, "krb5a"))
@@ -170,8 +167,16 @@ __u32 sptlrpc_name2flavor_base(const char *name)
                 return SPTLRPC_FLVR_KRB5I;
         if (!strcmp(name, "krb5p"))
                 return SPTLRPC_FLVR_KRB5P;
+       if (!strcmp(name, "skn"))
+               return SPTLRPC_FLVR_SKN;
+       if (!strcmp(name, "ska"))
+               return SPTLRPC_FLVR_SKA;
+       if (!strcmp(name, "ski"))
+               return SPTLRPC_FLVR_SKI;
+       if (!strcmp(name, "skpi"))
+               return SPTLRPC_FLVR_SKPI;
 
-        return SPTLRPC_FLVR_INVALID;
+       return SPTLRPC_FLVR_INVALID;
 }
 EXPORT_SYMBOL(sptlrpc_name2flavor_base);
 
@@ -183,6 +188,8 @@ const char *sptlrpc_flavor2name_base(__u32 flvr)
                 return "null";
         else if (base == SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_PLAIN))
                 return "plain";
+       else if (base == SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_GSSNULL))
+               return "gssnull";
         else if (base == SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_KRB5N))
                 return "krb5n";
         else if (base == SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_KRB5A))
@@ -191,9 +198,17 @@ const char *sptlrpc_flavor2name_base(__u32 flvr)
                 return "krb5i";
         else if (base == SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_KRB5P))
                 return "krb5p";
-
-        CERROR("invalid wire flavor 0x%x\n", flvr);
-        return "invalid";
+       else if (base == SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_SKN))
+               return "skn";
+       else if (base == SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_SKA))
+               return "ska";
+       else if (base == SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_SKI))
+               return "ski";
+       else if (base == SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_SKPI))
+               return "skpi";
+
+       CERROR("invalid wire flavor 0x%x\n", flvr);
+       return "invalid";
 }
 EXPORT_SYMBOL(sptlrpc_flavor2name_base);
 
@@ -274,8 +289,8 @@ struct ptlrpc_cli_ctx *get_my_ctx(struct ptlrpc_sec *sec)
                         remove_dead = 0;
                 }
        } else {
-               vcred.vc_uid = current_uid();
-               vcred.vc_gid = current_gid();
+               vcred.vc_uid = from_kuid(&init_user_ns, current_uid());
+               vcred.vc_gid = from_kgid(&init_user_ns, current_gid());
        }
 
        return sec->ps_policy->sp_cops->lookup_ctx(sec, &vcred, create,
@@ -284,22 +299,22 @@ struct ptlrpc_cli_ctx *get_my_ctx(struct ptlrpc_sec *sec)
 
 struct ptlrpc_cli_ctx *sptlrpc_cli_ctx_get(struct ptlrpc_cli_ctx *ctx)
 {
-        cfs_atomic_inc(&ctx->cc_refcount);
-        return ctx;
+       atomic_inc(&ctx->cc_refcount);
+       return ctx;
 }
 EXPORT_SYMBOL(sptlrpc_cli_ctx_get);
 
 void sptlrpc_cli_ctx_put(struct ptlrpc_cli_ctx *ctx, int sync)
 {
-        struct ptlrpc_sec *sec = ctx->cc_sec;
+       struct ptlrpc_sec *sec = ctx->cc_sec;
 
-        LASSERT(sec);
-        LASSERT_ATOMIC_POS(&ctx->cc_refcount);
+       LASSERT(sec);
+       LASSERT_ATOMIC_POS(&ctx->cc_refcount);
 
-        if (!cfs_atomic_dec_and_test(&ctx->cc_refcount))
-                return;
+       if (!atomic_dec_and_test(&ctx->cc_refcount))
+               return;
 
-        sec->ps_policy->sp_cops->release_ctx(sec, ctx, sync);
+       sec->ps_policy->sp_cops->release_ctx(sec, ctx, sync);
 }
 EXPORT_SYMBOL(sptlrpc_cli_ctx_put);
 
@@ -324,9 +339,9 @@ void sptlrpc_cli_ctx_wakeup(struct ptlrpc_cli_ctx *ctx)
        struct ptlrpc_request *req, *next;
 
        spin_lock(&ctx->cc_lock);
-       cfs_list_for_each_entry_safe(req, next, &ctx->cc_req_list,
+       list_for_each_entry_safe(req, next, &ctx->cc_req_list,
                                     rq_ctx_chain) {
-               cfs_list_del_init(&req->rq_ctx_chain);
+               list_del_init(&req->rq_ctx_chain);
                ptlrpc_client_wake_req(req);
        }
        spin_unlock(&ctx->cc_lock);
@@ -349,7 +364,7 @@ static int import_sec_check_expire(struct obd_import *imp)
 
        spin_lock(&imp->imp_lock);
        if (imp->imp_sec_expire &&
-           imp->imp_sec_expire < cfs_time_current_sec()) {
+           imp->imp_sec_expire < ktime_get_real_seconds()) {
                adapt = 1;
                imp->imp_sec_expire = 0;
        }
@@ -359,38 +374,51 @@ static int import_sec_check_expire(struct obd_import *imp)
                 return 0;
 
         CDEBUG(D_SEC, "found delayed sec adapt expired, do it now\n");
-        return sptlrpc_import_sec_adapt(imp, NULL, 0);
+       return sptlrpc_import_sec_adapt(imp, NULL, NULL);
 }
 
+/**
+ * Get and validate the client side ptlrpc security facilities from
+ * \a imp. There is a race condition on client reconnect when the import is
+ * being destroyed while there are outstanding client bound requests. In
+ * this case do not output any error messages if import secuity is not
+ * found.
+ *
+ * \param[in] imp obd import associated with client
+ * \param[out] sec client side ptlrpc security
+ *
+ * \retval 0 if security retrieved successfully
+ * \retval -ve errno if there was a problem
+ */
 static int import_sec_validate_get(struct obd_import *imp,
-                                   struct ptlrpc_sec **sec)
+                                  struct ptlrpc_sec **sec)
 {
-        int     rc;
+       int     rc;
 
-        if (unlikely(imp->imp_sec_expire)) {
-                rc = import_sec_check_expire(imp);
-                if (rc)
-                        return rc;
-        }
+       if (unlikely(imp->imp_sec_expire)) {
+               rc = import_sec_check_expire(imp);
+               if (rc)
+                       return rc;
+       }
 
-        *sec = sptlrpc_import_sec_ref(imp);
-        if (*sec == NULL) {
-                CERROR("import %p (%s) with no sec\n",
-                       imp, ptlrpc_import_state_name(imp->imp_state));
-                return -EACCES;
-        }
+       *sec = sptlrpc_import_sec_ref(imp);
+       if (*sec == NULL) {
+               CERROR("import %p (%s) with no sec\n",
+                       imp, ptlrpc_import_state_name(imp->imp_state));
+               return -EACCES;
+       }
 
-        if (unlikely((*sec)->ps_dying)) {
-                CERROR("attempt to use dying sec %p\n", sec);
-                sptlrpc_sec_put(*sec);
-                return -EACCES;
-        }
+       if (unlikely((*sec)->ps_dying)) {
+               CERROR("attempt to use dying sec %p\n", sec);
+               sptlrpc_sec_put(*sec);
+               return -EACCES;
+       }
 
-        return 0;
+       return 0;
 }
 
 /**
- * Given a \a req, find or allocate a appropriate context for it.
+ * Given a \a req, find or allocate an appropriate context for it.
  * \pre req->rq_cli_ctx == NULL.
  *
  * \retval 0 succeed, and req->rq_cli_ctx is set.
@@ -414,10 +442,10 @@ int sptlrpc_req_get_ctx(struct ptlrpc_request *req)
 
         sptlrpc_sec_put(sec);
 
-        if (!req->rq_cli_ctx) {
-                CERROR("req %p: fail to get context\n", req);
-                RETURN(-ENOMEM);
-        }
+       if (!req->rq_cli_ctx) {
+               CERROR("req %p: fail to get context\n", req);
+               RETURN(-ECONNREFUSED);
+       }
 
         RETURN(0);
 }
@@ -441,9 +469,9 @@ void sptlrpc_req_put_ctx(struct ptlrpc_request *req, int sync)
         /* request might be asked to release earlier while still
          * in the context waiting list.
          */
-        if (!cfs_list_empty(&req->rq_ctx_chain)) {
+       if (!list_empty(&req->rq_ctx_chain)) {
                spin_lock(&req->rq_cli_ctx->cc_lock);
-               cfs_list_del_init(&req->rq_ctx_chain);
+               list_del_init(&req->rq_ctx_chain);
                spin_unlock(&req->rq_cli_ctx->cc_lock);
         }
 
@@ -544,7 +572,7 @@ int sptlrpc_req_replace_dead_ctx(struct ptlrpc_request *req)
         newctx = req->rq_cli_ctx;
         LASSERT(newctx);
 
-        if (unlikely(newctx == oldctx && 
+       if (unlikely(newctx == oldctx &&
                     test_bit(PTLRPC_CTX_DEAD_BIT, &oldctx->cc_flags))) {
                 /*
                  * still get the old dead ctx, usually means system too busy
@@ -553,8 +581,16 @@ int sptlrpc_req_replace_dead_ctx(struct ptlrpc_request *req)
                        "ctx (%p, fl %lx) doesn't switch, relax a little bit\n",
                        newctx, newctx->cc_flags);
 
-               schedule_timeout_and_set_state(TASK_INTERRUPTIBLE,
-                                                  HZ);
+               set_current_state(TASK_INTERRUPTIBLE);
+               schedule_timeout(msecs_to_jiffies(MSEC_PER_SEC));
+       } else if (unlikely(test_bit(PTLRPC_CTX_UPTODATE_BIT, &newctx->cc_flags)
+                           == 0)) {
+               /*
+                * new ctx not up to date yet
+                */
+               CDEBUG(D_SEC,
+                      "ctx (%p, fl %lx) doesn't switch, not up to date yet\n",
+                      newctx, newctx->cc_flags);
        } else {
                 /*
                  * it's possible newctx == oldctx if we're switching
@@ -619,8 +655,8 @@ static
 void req_off_ctx_list(struct ptlrpc_request *req, struct ptlrpc_cli_ctx *ctx)
 {
        spin_lock(&ctx->cc_lock);
-       if (!cfs_list_empty(&req->rq_ctx_chain))
-               cfs_list_del_init(&req->rq_ctx_chain);
+       if (!list_empty(&req->rq_ctx_chain))
+               list_del_init(&req->rq_ctx_chain);
        spin_unlock(&ctx->cc_lock);
 }
 
@@ -710,10 +746,10 @@ again:
          * it for reply reconstruction.
          *
          * Commonly the original context should be uptodate because we
-         * have a expiry nice time; server will keep its context because
+        * have an expiry nice time; server will keep its context because
          * we at least hold a ref of old context which prevent context
-         * destroying RPC being sent. So server still can accept the request
-         * and finish the RPC. But if that's not the case:
+        * from destroying RPC being sent. So server still can accept the
+        * request and finish the RPC. But if that's not the case:
          *  1. If server side context has been trimmed, a NO_CONTEXT will
          *     be returned, gss_cli_ctx_verify/unseal will switch to new
          *     context by force.
@@ -759,8 +795,8 @@ again:
          * waiting list
          */
        spin_lock(&ctx->cc_lock);
-       if (cfs_list_empty(&req->rq_ctx_chain))
-               cfs_list_add(&req->rq_ctx_chain, &ctx->cc_req_list);
+       if (list_empty(&req->rq_ctx_chain))
+               list_add(&req->rq_ctx_chain, &ctx->cc_req_list);
        spin_unlock(&ctx->cc_lock);
 
        if (timeout < 0)
@@ -775,7 +811,8 @@ again:
        req->rq_restart = 0;
        spin_unlock(&req->rq_lock);
 
-       lwi = LWI_TIMEOUT_INTR(timeout * HZ, ctx_refresh_timeout,
+       lwi = LWI_TIMEOUT_INTR(msecs_to_jiffies(timeout * MSEC_PER_SEC),
+                              ctx_refresh_timeout,
                               ctx_refresh_interrupt, req);
        rc = l_wait_event(req->rq_reply_waitq, ctx_check_refresh(ctx), &lwi);
 
@@ -816,7 +853,7 @@ void sptlrpc_req_set_flavor(struct ptlrpc_request *req, int opcode)
         LASSERT(req->rq_cli_ctx->cc_sec);
         LASSERT(req->rq_bulk_read == 0 || req->rq_bulk_write == 0);
 
-        /* special security flags accoding to opcode */
+       /* special security flags according to opcode */
         switch (opcode) {
         case OST_READ:
         case MDS_READPAGE:
@@ -890,17 +927,17 @@ void sptlrpc_request_out_callback(struct ptlrpc_request *req)
  */
 int sptlrpc_import_check_ctx(struct obd_import *imp)
 {
-        struct ptlrpc_sec     *sec;
-        struct ptlrpc_cli_ctx *ctx;
-        struct ptlrpc_request *req = NULL;
-        int rc;
-        ENTRY;
+       struct ptlrpc_sec     *sec;
+       struct ptlrpc_cli_ctx *ctx;
+       struct ptlrpc_request *req = NULL;
+       int rc;
+       ENTRY;
 
-        cfs_might_sleep();
+       might_sleep();
 
-        sec = sptlrpc_import_sec_ref(imp);
-        ctx = get_my_ctx(sec);
-        sptlrpc_sec_put(sec);
+       sec = sptlrpc_import_sec_ref(imp);
+       ctx = get_my_ctx(sec);
+       sptlrpc_sec_put(sec);
 
         if (!ctx)
                 RETURN(-ENOMEM);
@@ -916,21 +953,19 @@ int sptlrpc_import_check_ctx(struct obd_import *imp)
                 RETURN(-EACCES);
         }
 
-       req = ptlrpc_request_cache_alloc(__GFP_IO);
+       req = ptlrpc_request_cache_alloc(GFP_NOFS);
        if (!req)
                RETURN(-ENOMEM);
 
-       spin_lock_init(&req->rq_lock);
-       cfs_atomic_set(&req->rq_refcount, 10000);
-       CFS_INIT_LIST_HEAD(&req->rq_ctx_chain);
-       init_waitqueue_head(&req->rq_reply_waitq);
-       init_waitqueue_head(&req->rq_set_waitq);
+       ptlrpc_cli_req_init(req);
+       atomic_set(&req->rq_refcount, 10000);
+
        req->rq_import = imp;
        req->rq_flvr = sec->ps_flvr;
        req->rq_cli_ctx = ctx;
 
         rc = sptlrpc_req_refresh_ctx(req, 0);
-        LASSERT(cfs_list_empty(&req->rq_ctx_chain));
+       LASSERT(list_empty(&req->rq_ctx_chain));
         sptlrpc_cli_ctx_put(req->rq_cli_ctx, 1);
        ptlrpc_request_cache_free(req);
 
@@ -1006,7 +1041,7 @@ static int do_cli_unwrap_reply(struct ptlrpc_request *req)
         case 0:
                 break;
         default:
-                CERROR("failed unpack reply: x"LPU64"\n", req->rq_xid);
+               CERROR("failed unpack reply: x%llu\n", req->rq_xid);
                 RETURN(-EPROTO);
         }
 
@@ -1088,32 +1123,34 @@ int sptlrpc_cli_unwrap_reply(struct ptlrpc_request *req)
  * changed at any time, no matter we're holding rq_lock or not. For this reason
  * we allocate a separate ptlrpc_request and reply buffer for early reply
  * processing.
- * 
+ *
  * \retval 0 success, \a req_ret is filled with a duplicated ptlrpc_request.
  * Later the caller must call sptlrpc_cli_finish_early_reply() on the returned
  * \a *req_ret to release it.
  * \retval -ev error number, and \a req_ret will not be set.
  */
 int sptlrpc_cli_unwrap_early_reply(struct ptlrpc_request *req,
-                                   struct ptlrpc_request **req_ret)
+                                  struct ptlrpc_request **req_ret)
 {
        struct ptlrpc_request  *early_req;
-       char                   *early_buf;
-       int                     early_bufsz, early_size;
-       int                     rc;
+       char                   *early_buf;
+       int                     early_bufsz, early_size;
+       int                     rc;
        ENTRY;
 
-       early_req = ptlrpc_request_cache_alloc(__GFP_IO);
-        if (early_req == NULL)
-                RETURN(-ENOMEM);
+       early_req = ptlrpc_request_cache_alloc(GFP_NOFS);
+       if (early_req == NULL)
+               RETURN(-ENOMEM);
 
-        early_size = req->rq_nob_received;
-        early_bufsz = size_roundup_power2(early_size);
-        OBD_ALLOC_LARGE(early_buf, early_bufsz);
-        if (early_buf == NULL)
-                GOTO(err_req, rc = -ENOMEM);
+       ptlrpc_cli_req_init(early_req);
 
-        /* sanity checkings and copy data out, do it inside spinlock */
+       early_size = req->rq_nob_received;
+       early_bufsz = size_roundup_power2(early_size);
+       OBD_ALLOC_LARGE(early_buf, early_bufsz);
+       if (early_buf == NULL)
+               GOTO(err_req, rc = -ENOMEM);
+
+       /* sanity checkings and copy data out, do it inside spinlock */
        spin_lock(&req->rq_lock);
 
        if (req->rq_replied) {
@@ -1149,7 +1186,6 @@ int sptlrpc_cli_unwrap_early_reply(struct ptlrpc_request *req,
        memcpy(early_buf, req->rq_repbuf, early_size);
        spin_unlock(&req->rq_lock);
 
-       spin_lock_init(&early_req->rq_lock);
         early_req->rq_cli_ctx = sptlrpc_cli_ctx_get(req->rq_cli_ctx);
         early_req->rq_flvr = req->rq_flvr;
         early_req->rq_repbuf = early_buf;
@@ -1202,11 +1238,11 @@ void sptlrpc_cli_finish_early_reply(struct ptlrpc_request *early_req)
 /*
  * "fixed" sec (e.g. null) use sec_id < 0
  */
-static cfs_atomic_t sptlrpc_sec_id = CFS_ATOMIC_INIT(1);
+static atomic_t sptlrpc_sec_id = ATOMIC_INIT(1);
 
 int sptlrpc_get_next_secid(void)
 {
-        return cfs_atomic_inc_return(&sptlrpc_sec_id);
+       return atomic_inc_return(&sptlrpc_sec_id);
 }
 EXPORT_SYMBOL(sptlrpc_get_next_secid);
 
@@ -1258,23 +1294,23 @@ static void sptlrpc_sec_kill(struct ptlrpc_sec *sec)
 
 struct ptlrpc_sec *sptlrpc_sec_get(struct ptlrpc_sec *sec)
 {
-        if (sec)
-                cfs_atomic_inc(&sec->ps_refcount);
+       if (sec)
+               atomic_inc(&sec->ps_refcount);
 
-        return sec;
+       return sec;
 }
 EXPORT_SYMBOL(sptlrpc_sec_get);
 
 void sptlrpc_sec_put(struct ptlrpc_sec *sec)
 {
-        if (sec) {
-                LASSERT_ATOMIC_POS(&sec->ps_refcount);
+       if (sec) {
+               LASSERT_ATOMIC_POS(&sec->ps_refcount);
 
-                if (cfs_atomic_dec_and_test(&sec->ps_refcount)) {
-                        sptlrpc_gc_del_sec(sec);
-                        sec_cop_destroy_sec(sec);
-                }
-        }
+               if (atomic_dec_and_test(&sec->ps_refcount)) {
+                       sptlrpc_gc_del_sec(sec);
+                       sec_cop_destroy_sec(sec);
+               }
+       }
 }
 EXPORT_SYMBOL(sptlrpc_sec_put);
 
@@ -1317,19 +1353,19 @@ struct ptlrpc_sec * sptlrpc_sec_create(struct obd_import *imp,
                 }
         }
 
-        sec = policy->sp_cops->create_sec(imp, svc_ctx, sf);
-        if (sec) {
-                cfs_atomic_inc(&sec->ps_refcount);
+       sec = policy->sp_cops->create_sec(imp, svc_ctx, sf);
+       if (sec) {
+               atomic_inc(&sec->ps_refcount);
 
-                sec->ps_part = sp;
+               sec->ps_part = sp;
 
-                if (sec->ps_gc_interval && policy->sp_cops->gc_ctx)
-                        sptlrpc_gc_add_sec(sec);
-        } else {
-                sptlrpc_policy_put(policy);
-        }
+               if (sec->ps_gc_interval && policy->sp_cops->gc_ctx)
+                       sptlrpc_gc_add_sec(sec);
+       } else {
+               sptlrpc_policy_put(policy);
+       }
 
-        RETURN(sec);
+       RETURN(sec);
 }
 
 struct ptlrpc_sec *sptlrpc_import_sec_ref(struct obd_import *imp)
@@ -1376,24 +1412,6 @@ void flavor_copy(struct sptlrpc_flavor *dst, struct sptlrpc_flavor *src)
         *dst = *src;
 }
 
-static void sptlrpc_import_sec_adapt_inplace(struct obd_import *imp,
-                                             struct ptlrpc_sec *sec,
-                                             struct sptlrpc_flavor *sf)
-{
-        char    str1[32], str2[32];
-
-        if (sec->ps_flvr.sf_flags != sf->sf_flags)
-                CDEBUG(D_SEC, "changing sec flags: %s -> %s\n",
-                       sptlrpc_secflags2str(sec->ps_flvr.sf_flags,
-                                            str1, sizeof(str1)),
-                       sptlrpc_secflags2str(sf->sf_flags,
-                                            str2, sizeof(str2)));
-
-       spin_lock(&sec->ps_lock);
-       flavor_copy(&sec->ps_flvr, sf);
-       spin_unlock(&sec->ps_lock);
-}
-
 /**
  * To get an appropriate ptlrpc_sec for the \a imp, according to the current
  * configuration. Upon called, imp->imp_sec may or may not be NULL.
@@ -1405,20 +1423,20 @@ int sptlrpc_import_sec_adapt(struct obd_import *imp,
                              struct ptlrpc_svc_ctx *svc_ctx,
                              struct sptlrpc_flavor *flvr)
 {
-        struct ptlrpc_connection   *conn;
-        struct sptlrpc_flavor       sf;
-        struct ptlrpc_sec          *sec, *newsec;
-        enum lustre_sec_part        sp;
-        char                        str[24];
-        int                         rc = 0;
-        ENTRY;
+       struct ptlrpc_connection   *conn;
+       struct sptlrpc_flavor       sf;
+       struct ptlrpc_sec          *sec, *newsec;
+       enum lustre_sec_part        sp;
+       char                        str[24];
+       int                         rc = 0;
+       ENTRY;
 
-        cfs_might_sleep();
+       might_sleep();
 
-        if (imp == NULL)
-                RETURN(0);
+       if (imp == NULL)
+               RETURN(0);
 
-        conn = imp->imp_connection;
+       conn = imp->imp_connection;
 
         if (svc_ctx == NULL) {
                 struct client_obd *cliobd = &imp->imp_obd->u.cli;
@@ -1458,14 +1476,6 @@ int sptlrpc_import_sec_adapt(struct obd_import *imp,
                        obd_uuid2str(&conn->c_remote_uuid),
                        sptlrpc_flavor2name(&sec->ps_flvr, str, sizeof(str)),
                        sptlrpc_flavor2name(&sf, str2, sizeof(str2)));
-
-                if (SPTLRPC_FLVR_POLICY(sf.sf_rpc) ==
-                    SPTLRPC_FLVR_POLICY(sec->ps_flvr.sf_rpc) &&
-                    SPTLRPC_FLVR_MECH(sf.sf_rpc) ==
-                    SPTLRPC_FLVR_MECH(sec->ps_flvr.sf_rpc)) {
-                        sptlrpc_import_sec_adapt_inplace(imp, sec, &sf);
-                        GOTO(out, rc);
-                }
         } else if (SPTLRPC_FLVR_BASE(sf.sf_rpc) !=
                    SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_NULL)) {
                 CDEBUG(D_SEC, "import %s->%s netid %x: select flavor %s\n",
@@ -1528,7 +1538,8 @@ void sptlrpc_import_flush_root_ctx(struct obd_import *imp)
 
 void sptlrpc_import_flush_my_ctx(struct obd_import *imp)
 {
-       import_flush_ctx_common(imp, current_uid(), 1, 1);
+       import_flush_ctx_common(imp, from_kuid(&init_user_ns, current_uid()),
+                               1, 1);
 }
 EXPORT_SYMBOL(sptlrpc_import_flush_my_ctx);
 
@@ -1644,11 +1655,14 @@ EXPORT_SYMBOL(_sptlrpc_enlarge_msg_inplace);
  * so caller should refresh its local pointers if needed.
  */
 int sptlrpc_cli_enlarge_reqbuf(struct ptlrpc_request *req,
-                               int segment, int newsize)
+                              const struct req_msg_field *field,
+                              int newsize)
 {
-        struct ptlrpc_cli_ctx    *ctx = req->rq_cli_ctx;
-        struct ptlrpc_sec_cops   *cops;
-        struct lustre_msg        *msg = req->rq_reqmsg;
+       struct req_capsule *pill = &req->rq_pill;
+       struct ptlrpc_cli_ctx *ctx = req->rq_cli_ctx;
+       struct ptlrpc_sec_cops *cops;
+       struct lustre_msg *msg = req->rq_reqmsg;
+       int segment = __req_capsule_offset(pill, field, RCL_CLIENT);
 
         LASSERT(ctx);
         LASSERT(msg);
@@ -1710,6 +1724,7 @@ void sptlrpc_cli_free_repbuf(struct ptlrpc_request *req)
         req->rq_repmsg = NULL;
         EXIT;
 }
+EXPORT_SYMBOL(sptlrpc_cli_free_repbuf);
 
 int sptlrpc_cli_install_rvs_ctx(struct obd_import *imp,
                                 struct ptlrpc_cli_ctx *ctx)
@@ -1793,7 +1808,7 @@ int sptlrpc_target_export_check(struct obd_export *exp,
                 exp->exp_flvr_old[1] = exp->exp_flvr_old[0];
                 exp->exp_flvr_expire[1] = exp->exp_flvr_expire[0];
                 exp->exp_flvr_old[0] = exp->exp_flvr;
-                exp->exp_flvr_expire[0] = cfs_time_current_sec() +
+               exp->exp_flvr_expire[0] = ktime_get_real_seconds() +
                                           EXP_FLVR_UPDATE_EXPIRE;
                 exp->exp_flvr = flavor;
 
@@ -1867,15 +1882,14 @@ int sptlrpc_target_export_check(struct obd_export *exp,
         }
 
         if (exp->exp_flvr_expire[0]) {
-                if (exp->exp_flvr_expire[0] >= cfs_time_current_sec()) {
+               if (exp->exp_flvr_expire[0] >= ktime_get_real_seconds()) {
                         if (flavor_allowed(&exp->exp_flvr_old[0], req)) {
-                                CDEBUG(D_SEC, "exp %p (%x|%x|%x): match the "
-                                       "middle one ("CFS_DURATION_T")\n", exp,
+                               CDEBUG(D_SEC, "exp %p (%x|%x|%x): match the middle one (%lld)\n", exp,
                                        exp->exp_flvr.sf_rpc,
                                        exp->exp_flvr_old[0].sf_rpc,
                                        exp->exp_flvr_old[1].sf_rpc,
-                                       exp->exp_flvr_expire[0] -
-                                                cfs_time_current_sec());
+                                      (s64)(exp->exp_flvr_expire[0] -
+                                      ktime_get_real_seconds()));
                                spin_unlock(&exp->exp_lock);
                                 return 0;
                         }
@@ -1892,15 +1906,15 @@ int sptlrpc_target_export_check(struct obd_export *exp,
         /* now it doesn't match the current flavor, the only chance we can
          * accept it is match the old flavors which is not expired. */
         if (exp->exp_flvr_changed == 0 && exp->exp_flvr_expire[1]) {
-                if (exp->exp_flvr_expire[1] >= cfs_time_current_sec()) {
+               if (exp->exp_flvr_expire[1] >= ktime_get_real_seconds()) {
                         if (flavor_allowed(&exp->exp_flvr_old[1], req)) {
-                                CDEBUG(D_SEC, "exp %p (%x|%x|%x): match the "
-                                       "oldest one ("CFS_DURATION_T")\n", exp,
+                               CDEBUG(D_SEC, "exp %p (%x|%x|%x): match the oldest one (%lld)\n",
+                                      exp,
                                        exp->exp_flvr.sf_rpc,
                                        exp->exp_flvr_old[0].sf_rpc,
                                        exp->exp_flvr_old[1].sf_rpc,
-                                       exp->exp_flvr_expire[1] -
-                                                cfs_time_current_sec());
+                                      (s64)(exp->exp_flvr_expire[1] -
+                                      ktime_get_real_seconds()));
                                spin_unlock(&exp->exp_lock);
                                 return 0;
                         }
@@ -1920,8 +1934,7 @@ int sptlrpc_target_export_check(struct obd_export *exp,
 
        spin_unlock(&exp->exp_lock);
 
-        CWARN("exp %p(%s): req %p (%u|%u|%u|%u|%u|%u) with "
-              "unauthorized flavor %x, expect %x|%x(%+ld)|%x(%+ld)\n",
+       CWARN("exp %p(%s): req %p (%u|%u|%u|%u|%u|%u) with unauthorized flavor %x, expect %x|%x(%+lld)|%x(%+lld)\n",
               exp, exp->exp_obd->obd_name,
               req, req->rq_auth_gss, req->rq_ctx_init, req->rq_ctx_fini,
               req->rq_auth_usr_root, req->rq_auth_usr_mdt, req->rq_auth_usr_ost,
@@ -1929,12 +1942,10 @@ int sptlrpc_target_export_check(struct obd_export *exp,
               exp->exp_flvr.sf_rpc,
               exp->exp_flvr_old[0].sf_rpc,
               exp->exp_flvr_expire[0] ?
-              (unsigned long) (exp->exp_flvr_expire[0] -
-                               cfs_time_current_sec()) : 0,
+             (s64)(exp->exp_flvr_expire[0] - ktime_get_real_seconds()) : 0,
               exp->exp_flvr_old[1].sf_rpc,
               exp->exp_flvr_expire[1] ?
-              (unsigned long) (exp->exp_flvr_expire[1] -
-                               cfs_time_current_sec()) : 0);
+             (s64)(exp->exp_flvr_expire[1] - ktime_get_real_seconds()) : 0);
         return -EACCES;
 }
 EXPORT_SYMBOL(sptlrpc_target_export_check);
@@ -1949,7 +1960,7 @@ void sptlrpc_target_update_exp_flavor(struct obd_device *obd,
 
        spin_lock(&obd->obd_dev_lock);
 
-       cfs_list_for_each_entry(exp, &obd->obd_exports, exp_obd_chain) {
+       list_for_each_entry(exp, &obd->obd_exports, exp_obd_chain) {
                if (exp->exp_connection == NULL)
                        continue;
 
@@ -2023,7 +2034,7 @@ static int sptlrpc_svc_check_from(struct ptlrpc_request *req, int svc_rc)
 
 /**
  * Used by ptlrpc server, to perform transformation upon request message of
- * incoming \a req. This must be the first thing to do with a incoming
+ * incoming \a req. This must be the first thing to do with an incoming
  * request in ptlrpc layer.
  *
  * \retval SECSVC_OK success, and req->rq_reqmsg point to request message in
@@ -2053,15 +2064,15 @@ int sptlrpc_svc_unwrap_request(struct ptlrpc_request *req)
         case 0:
                 break;
         default:
-                CERROR("error unpacking request from %s x"LPU64"\n",
+               CERROR("error unpacking request from %s x%llu\n",
                        libcfs_id2str(req->rq_peer), req->rq_xid);
                 RETURN(SECSVC_DROP);
         }
 
         req->rq_flvr.sf_rpc = WIRE_FLVR(msg->lm_secflvr);
         req->rq_sp_from = LUSTRE_SP_ANY;
-        req->rq_auth_uid = INVALID_UID;
-        req->rq_auth_mapped_uid = INVALID_UID;
+       req->rq_auth_uid = -1;          /* set to INVALID_UID */
+       req->rq_auth_mapped_uid = -1;
 
         policy = sptlrpc_wireflavor2policy(req->rq_flvr.sf_rpc);
         if (!policy) {
@@ -2107,8 +2118,18 @@ int sptlrpc_svc_alloc_rs(struct ptlrpc_request *req, int msglen)
 
         rc = policy->sp_sops->alloc_rs(req, msglen);
         if (unlikely(rc == -ENOMEM)) {
+               struct ptlrpc_service_part *svcpt = req->rq_rqbd->rqbd_svcpt;
+               if (svcpt->scp_service->srv_max_reply_size <
+                  msglen + sizeof(struct ptlrpc_reply_state)) {
+                       /* Just return failure if the size is too big */
+                       CERROR("size of message is too big (%zd), %d allowed\n",
+                               msglen + sizeof(struct ptlrpc_reply_state),
+                               svcpt->scp_service->srv_max_reply_size);
+                       RETURN(-ENOMEM);
+               }
+
                 /* failed alloc, try emergency pool */
-               rs = lustre_get_emerg_rs(req->rq_rqbd->rqbd_svcpt);
+               rs = lustre_get_emerg_rs(svcpt);
                 if (rs == NULL)
                         RETURN(-ENOMEM);
 
@@ -2175,25 +2196,25 @@ void sptlrpc_svc_free_rs(struct ptlrpc_reply_state *rs)
 
 void sptlrpc_svc_ctx_addref(struct ptlrpc_request *req)
 {
-        struct ptlrpc_svc_ctx *ctx = req->rq_svc_ctx;
+       struct ptlrpc_svc_ctx *ctx = req->rq_svc_ctx;
 
-        if (ctx != NULL)
-                cfs_atomic_inc(&ctx->sc_refcount);
+       if (ctx != NULL)
+               atomic_inc(&ctx->sc_refcount);
 }
 
 void sptlrpc_svc_ctx_decref(struct ptlrpc_request *req)
 {
-        struct ptlrpc_svc_ctx *ctx = req->rq_svc_ctx;
+       struct ptlrpc_svc_ctx *ctx = req->rq_svc_ctx;
 
-        if (ctx == NULL)
-                return;
+       if (ctx == NULL)
+               return;
 
-        LASSERT_ATOMIC_POS(&ctx->sc_refcount);
-        if (cfs_atomic_dec_and_test(&ctx->sc_refcount)) {
-                if (ctx->sc_policy->sp_sops->free_ctx)
-                        ctx->sc_policy->sp_sops->free_ctx(ctx);
-        }
-        req->rq_svc_ctx = NULL;
+       LASSERT_ATOMIC_POS(&ctx->sc_refcount);
+       if (atomic_dec_and_test(&ctx->sc_refcount)) {
+               if (ctx->sc_policy->sp_sops->free_ctx)
+                       ctx->sc_policy->sp_sops->free_ctx(ctx);
+       }
+       req->rq_svc_ctx = NULL;
 }
 
 void sptlrpc_svc_ctx_invalidate(struct ptlrpc_request *req)
@@ -2287,12 +2308,12 @@ int sptlrpc_cli_unwrap_bulk_write(struct ptlrpc_request *req,
          * in case of privacy mode, nob_transferred needs to be adjusted.
          */
         if (desc->bd_nob != desc->bd_nob_transferred) {
-                CERROR("nob %d doesn't match transferred nob %d",
-                       desc->bd_nob, desc->bd_nob_transferred);
-                return -EPROTO;
-        }
+               CERROR("nob %d doesn't match transferred nob %d\n",
+                      desc->bd_nob, desc->bd_nob_transferred);
+               return -EPROTO;
+       }
 
-        return 0;
+       return 0;
 }
 EXPORT_SYMBOL(sptlrpc_cli_unwrap_bulk_write);
 
@@ -2388,14 +2409,10 @@ int sptlrpc_current_user_desc_size(void)
 {
         int ngroups;
 
-#ifdef __KERNEL__
         ngroups = current_ngroups;
 
         if (ngroups > LUSTRE_MAX_GROUPS)
                 ngroups = LUSTRE_MAX_GROUPS;
-#else
-        ngroups = 0;
-#endif
         return sptlrpc_user_desc_size(ngroups);
 }
 EXPORT_SYMBOL(sptlrpc_current_user_desc_size);
@@ -2406,21 +2423,24 @@ int sptlrpc_pack_user_desc(struct lustre_msg *msg, int offset)
 
        pud = lustre_msg_buf(msg, offset, 0);
 
-       pud->pud_uid = current_uid();
-       pud->pud_gid = current_gid();
-       pud->pud_fsuid = current_fsuid();
-       pud->pud_fsgid = current_fsgid();
+       pud->pud_uid = from_kuid(&init_user_ns, current_uid());
+       pud->pud_gid = from_kgid(&init_user_ns, current_gid());
+       pud->pud_fsuid = from_kuid(&init_user_ns, current_fsuid());
+       pud->pud_fsgid = from_kgid(&init_user_ns, current_fsgid());
        pud->pud_cap = cfs_curproc_cap_pack();
        pud->pud_ngroups = (msg->lm_buflens[offset] - sizeof(*pud)) / 4;
 
-#ifdef __KERNEL__
        task_lock(current);
        if (pud->pud_ngroups > current_ngroups)
                pud->pud_ngroups = current_ngroups;
+#ifdef HAVE_GROUP_INFO_GID
+       memcpy(pud->pud_groups, current_cred()->group_info->gid,
+              pud->pud_ngroups * sizeof(__u32));
+#else /* !HAVE_GROUP_INFO_GID */
        memcpy(pud->pud_groups, current_cred()->group_info->blocks[0],
               pud->pud_ngroups * sizeof(__u32));
+#endif /* HAVE_GROUP_INFO_GID */
        task_unlock(current);
-#endif
 
        return 0;
 }