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LU-9679 ptlrpc: use OBD_ALLOC_PTR_ARRAY() and FREE
[fs/lustre-release.git] / lustre / ptlrpc / lproc_ptlrpc.c
index 08a2faa..ee5e8c3 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) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
  *
- * Copyright (c) 2011, 2013, Intel Corporation.
+ * Copyright (c) 2011, 2017, Intel Corporation.
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
 #include <obd_support.h>
 #include <obd.h>
 #include <lprocfs_status.h>
-#include <lustre/lustre_idl.h>
 #include <lustre_net.h>
 #include <obd_class.h>
 #include "ptlrpc_internal.h"
 
 
-struct ll_rpc_opcode {
-     __u32       opcode;
-     const char *opname;
+static struct ll_rpc_opcode {
+       __u32       opcode;
+       const char *opname;
 } ll_rpc_opcode_table[LUSTRE_MAX_OPCODES] = {
-        { OST_REPLY,        "ost_reply" },
-        { OST_GETATTR,      "ost_getattr" },
-        { OST_SETATTR,      "ost_setattr" },
-        { OST_READ,         "ost_read" },
-        { OST_WRITE,        "ost_write" },
-        { OST_CREATE ,      "ost_create" },
-        { OST_DESTROY,      "ost_destroy" },
-        { OST_GET_INFO,     "ost_get_info" },
-        { OST_CONNECT,      "ost_connect" },
-        { OST_DISCONNECT,   "ost_disconnect" },
-        { OST_PUNCH,        "ost_punch" },
-        { OST_OPEN,         "ost_open" },
-        { OST_CLOSE,        "ost_close" },
-        { OST_STATFS,       "ost_statfs" },
-        { 14,                NULL },    /* formerly OST_SAN_READ */
-        { 15,                NULL },    /* formerly OST_SAN_WRITE */
-        { OST_SYNC,         "ost_sync" },
-        { OST_SET_INFO,     "ost_set_info" },
-        { OST_QUOTACHECK,   "ost_quotacheck" },
-        { OST_QUOTACTL,     "ost_quotactl" },
-        { OST_QUOTA_ADJUST_QUNIT, "ost_quota_adjust_qunit" },
-        { MDS_GETATTR,      "mds_getattr" },
-        { MDS_GETATTR_NAME, "mds_getattr_lock" },
-        { MDS_CLOSE,        "mds_close" },
-        { MDS_REINT,        "mds_reint" },
-        { MDS_READPAGE,     "mds_readpage" },
-        { MDS_CONNECT,      "mds_connect" },
-        { MDS_DISCONNECT,   "mds_disconnect" },
-        { MDS_GETSTATUS,    "mds_getstatus" },
-        { MDS_STATFS,       "mds_statfs" },
-        { MDS_PIN,          "mds_pin" },
-        { MDS_UNPIN,        "mds_unpin" },
-        { MDS_SYNC,         "mds_sync" },
-        { MDS_DONE_WRITING, "mds_done_writing" },
-        { MDS_SET_INFO,     "mds_set_info" },
-        { MDS_QUOTACHECK,   "mds_quotacheck" },
-        { MDS_QUOTACTL,     "mds_quotactl" },
-        { MDS_GETXATTR,     "mds_getxattr" },
-        { MDS_SETXATTR,     "mds_setxattr" },
-        { MDS_WRITEPAGE,    "mds_writepage" },
-        { MDS_IS_SUBDIR,    "mds_is_subdir" },
-        { MDS_GET_INFO,     "mds_get_info" },
+       { OST_REPLY,        "ost_reply" },
+       { OST_GETATTR,      "ost_getattr" },
+       { OST_SETATTR,      "ost_setattr" },
+       { OST_READ,         "ost_read" },
+       { OST_WRITE,        "ost_write" },
+       { OST_CREATE ,      "ost_create" },
+       { OST_DESTROY,      "ost_destroy" },
+       { OST_GET_INFO,     "ost_get_info" },
+       { OST_CONNECT,      "ost_connect" },
+       { OST_DISCONNECT,   "ost_disconnect" },
+       { OST_PUNCH,        "ost_punch" },
+       { OST_OPEN,         "ost_open" },
+       { OST_CLOSE,        "ost_close" },
+       { OST_STATFS,       "ost_statfs" },
+       { 14,                NULL },    /* formerly OST_SAN_READ */
+       { 15,                NULL },    /* formerly OST_SAN_WRITE */
+       { OST_SYNC,         "ost_sync" },
+       { OST_SET_INFO,     "ost_set_info" },
+       { OST_QUOTACHECK,   "ost_quotacheck" },
+       { OST_QUOTACTL,     "ost_quotactl" },
+       { OST_QUOTA_ADJUST_QUNIT, "ost_quota_adjust_qunit" },
+       { OST_LADVISE,      "ost_ladvise" },
+       { OST_FALLOCATE,    "ost_fallocate"},
+       { MDS_GETATTR,      "mds_getattr" },
+       { MDS_GETATTR_NAME, "mds_getattr_lock" },
+       { MDS_CLOSE,        "mds_close" },
+       { MDS_REINT,        "mds_reint" },
+       { MDS_READPAGE,     "mds_readpage" },
+       { MDS_CONNECT,      "mds_connect" },
+       { MDS_DISCONNECT,   "mds_disconnect" },
+       { MDS_GET_ROOT,     "mds_get_root" },
+       { MDS_STATFS,       "mds_statfs" },
+       { MDS_PIN,          "mds_pin" },
+       { MDS_UNPIN,        "mds_unpin" },
+       { MDS_SYNC,         "mds_sync" },
+       { MDS_DONE_WRITING, "mds_done_writing" },
+       { MDS_SET_INFO,     "mds_set_info" },
+       { MDS_QUOTACHECK,   "mds_quotacheck" },
+       { MDS_QUOTACTL,     "mds_quotactl" },
+       { MDS_GETXATTR,     "mds_getxattr" },
+       { MDS_SETXATTR,     "mds_setxattr" },
+       { MDS_WRITEPAGE,    "mds_writepage" },
+       { MDS_IS_SUBDIR,    "mds_is_subdir" },
+       { MDS_GET_INFO,     "mds_get_info" },
        { MDS_HSM_STATE_GET, "mds_hsm_state_get" },
        { MDS_HSM_STATE_SET, "mds_hsm_state_set" },
        { MDS_HSM_ACTION,   "mds_hsm_action" },
@@ -99,39 +96,40 @@ struct ll_rpc_opcode {
        { MDS_HSM_CT_REGISTER, "mds_hsm_ct_register" },
        { MDS_HSM_CT_UNREGISTER, "mds_hsm_ct_unregister" },
        { MDS_SWAP_LAYOUTS,     "mds_swap_layouts" },
-        { LDLM_ENQUEUE,     "ldlm_enqueue" },
-        { LDLM_CONVERT,     "ldlm_convert" },
-        { LDLM_CANCEL,      "ldlm_cancel" },
-        { LDLM_BL_CALLBACK, "ldlm_bl_callback" },
-        { LDLM_CP_CALLBACK, "ldlm_cp_callback" },
-        { LDLM_GL_CALLBACK, "ldlm_gl_callback" },
-        { LDLM_SET_INFO,    "ldlm_set_info" },
-        { MGS_CONNECT,      "mgs_connect" },
-        { MGS_DISCONNECT,   "mgs_disconnect" },
-        { MGS_EXCEPTION,    "mgs_exception" },
-        { MGS_TARGET_REG,   "mgs_target_reg" },
-        { MGS_TARGET_DEL,   "mgs_target_del" },
-        { MGS_SET_INFO,     "mgs_set_info" },
-        { MGS_CONFIG_READ,  "mgs_config_read" },
-        { OBD_PING,         "obd_ping" },
-       { OBD_LOG_CANCEL,       "llog_cancel" },
-        { OBD_QC_CALLBACK,  "obd_quota_callback" },
-       { OBD_IDX_READ,     "dt_index_read" },
-       { LLOG_ORIGIN_HANDLE_CREATE,     "llog_origin_handle_open" },
-        { LLOG_ORIGIN_HANDLE_NEXT_BLOCK, "llog_origin_handle_next_block" },
-        { LLOG_ORIGIN_HANDLE_READ_HEADER,"llog_origin_handle_read_header" },
-        { LLOG_ORIGIN_HANDLE_WRITE_REC,  "llog_origin_handle_write_rec" },
-        { LLOG_ORIGIN_HANDLE_CLOSE,      "llog_origin_handle_close" },
-        { LLOG_ORIGIN_CONNECT,           "llog_origin_connect" },
-        { LLOG_CATINFO,                  "llog_catinfo" },
-        { LLOG_ORIGIN_HANDLE_PREV_BLOCK, "llog_origin_handle_prev_block" },
-        { LLOG_ORIGIN_HANDLE_DESTROY,    "llog_origin_handle_destroy" },
-        { QUOTA_DQACQ,      "quota_acquire" },
-        { QUOTA_DQREL,      "quota_release" },
-        { SEQ_QUERY,        "seq_query" },
-        { SEC_CTX_INIT,     "sec_ctx_init" },
-        { SEC_CTX_INIT_CONT,"sec_ctx_init_cont" },
-        { SEC_CTX_FINI,     "sec_ctx_fini" },
+       { MDS_RMFID,        "mds_rmfid" },
+       { LDLM_ENQUEUE,     "ldlm_enqueue" },
+       { LDLM_CONVERT,     "ldlm_convert" },
+       { LDLM_CANCEL,      "ldlm_cancel" },
+       { LDLM_BL_CALLBACK, "ldlm_bl_callback" },
+       { LDLM_CP_CALLBACK, "ldlm_cp_callback" },
+       { LDLM_GL_CALLBACK, "ldlm_gl_callback" },
+       { LDLM_SET_INFO,    "ldlm_set_info" },
+       { MGS_CONNECT,      "mgs_connect" },
+       { MGS_DISCONNECT,   "mgs_disconnect" },
+       { MGS_EXCEPTION,    "mgs_exception" },
+       { MGS_TARGET_REG,   "mgs_target_reg" },
+       { MGS_TARGET_DEL,   "mgs_target_del" },
+       { MGS_SET_INFO,     "mgs_set_info" },
+       { MGS_CONFIG_READ,  "mgs_config_read" },
+       { OBD_PING,                      "obd_ping" },
+       { 401, /* was OBD_LOG_CANCEL */ "llog_cancel" },
+       { 402, /* was OBD_QC_CALLBACK */ "obd_quota_callback" },
+       { OBD_IDX_READ, "dt_index_read" },
+       { LLOG_ORIGIN_HANDLE_CREATE, "llog_origin_handle_open" },
+       { LLOG_ORIGIN_HANDLE_NEXT_BLOCK, "llog_origin_handle_next_block" },
+       { LLOG_ORIGIN_HANDLE_READ_HEADER, "llog_origin_handle_read_header" },
+       { 504, /*LLOG_ORIGIN_HANDLE_WRITE_REC*/"llog_origin_handle_write_rec" },
+       { 505, /* was LLOG_ORIGIN_HANDLE_CLOSE */ "llog_origin_handle_close" },
+       { 506, /* was LLOG_ORIGIN_CONNECT */ "llog_origin_connect" },
+       { 507, /* was LLOG_CATINFO */ "llog_catinfo" },
+       { LLOG_ORIGIN_HANDLE_PREV_BLOCK, "llog_origin_handle_prev_block" },
+       { LLOG_ORIGIN_HANDLE_DESTROY,    "llog_origin_handle_destroy" },
+       { QUOTA_DQACQ,      "quota_acquire" },
+       { QUOTA_DQREL,      "quota_release" },
+       { SEQ_QUERY,        "seq_query" },
+       { SEC_CTX_INIT,     "sec_ctx_init" },
+       { SEC_CTX_INIT_CONT, "sec_ctx_init_cont" },
+       { SEC_CTX_FINI,     "sec_ctx_fini" },
        { FLD_QUERY,        "fld_query" },
        { FLD_READ,         "fld_read" },
        { OUT_UPDATE,       "out_update" },
@@ -139,24 +137,25 @@ struct ll_rpc_opcode {
        { LFSCK_QUERY,      "lfsck_query" },
 };
 
-struct ll_eopcode {
-     __u32       opcode;
-     const char *opname;
+static struct ll_eopcode {
+       __u32       opcode;
+       const char *opname;
 } ll_eopcode_table[EXTRA_LAST_OPC] = {
-        { LDLM_GLIMPSE_ENQUEUE, "ldlm_glimpse_enqueue" },
-        { LDLM_PLAIN_ENQUEUE,   "ldlm_plain_enqueue" },
-        { LDLM_EXTENT_ENQUEUE,  "ldlm_extent_enqueue" },
-        { LDLM_FLOCK_ENQUEUE,   "ldlm_flock_enqueue" },
-        { LDLM_IBITS_ENQUEUE,   "ldlm_ibits_enqueue" },
-        { MDS_REINT_SETATTR,    "mds_reint_setattr" },
-        { MDS_REINT_CREATE,     "mds_reint_create" },
-        { MDS_REINT_LINK,       "mds_reint_link" },
-        { MDS_REINT_UNLINK,     "mds_reint_unlink" },
-        { MDS_REINT_RENAME,     "mds_reint_rename" },
-        { MDS_REINT_OPEN,       "mds_reint_open" },
-        { MDS_REINT_SETXATTR,   "mds_reint_setxattr" },
-        { BRW_READ_BYTES,       "read_bytes" },
-        { BRW_WRITE_BYTES,      "write_bytes" },
+       { LDLM_GLIMPSE_ENQUEUE, "ldlm_glimpse_enqueue" },
+       { LDLM_PLAIN_ENQUEUE,   "ldlm_plain_enqueue" },
+       { LDLM_EXTENT_ENQUEUE,  "ldlm_extent_enqueue" },
+       { LDLM_FLOCK_ENQUEUE,   "ldlm_flock_enqueue" },
+       { LDLM_IBITS_ENQUEUE,   "ldlm_ibits_enqueue" },
+       { MDS_REINT_SETATTR,    "mds_reint_setattr" },
+       { MDS_REINT_CREATE,     "mds_reint_create" },
+       { MDS_REINT_LINK,       "mds_reint_link" },
+       { MDS_REINT_UNLINK,     "mds_reint_unlink" },
+       { MDS_REINT_RENAME,     "mds_reint_rename" },
+       { MDS_REINT_OPEN,       "mds_reint_open" },
+       { MDS_REINT_SETXATTR,   "mds_reint_setxattr" },
+       { MDS_REINT_RESYNC,     "mds_reint_resync" },
+       { BRW_READ_BYTES,       "read_bytes" },
+       { BRW_WRITE_BYTES,      "write_bytes" },
 };
 
 const char *ll_opcode2str(__u32 opcode)
@@ -178,38 +177,48 @@ const char *ll_opcode2str(__u32 opcode)
         return ll_rpc_opcode_table[offset].opname;
 }
 
-const char* ll_eopcode2str(__u32 opcode)
+const int ll_str2opcode(const char *ops)
+{
+       int i;
+
+       for (i = 0; i < LUSTRE_MAX_OPCODES; i++) {
+               if (ll_rpc_opcode_table[i].opname != NULL &&
+                   strcmp(ll_rpc_opcode_table[i].opname, ops) == 0)
+                       return ll_rpc_opcode_table[i].opcode;
+       }
+
+       return -EINVAL;
+}
+
+static const char *ll_eopcode2str(__u32 opcode)
 {
         LASSERT(ll_eopcode_table[opcode].opcode == opcode);
         return ll_eopcode_table[opcode].opname;
 }
-#ifdef LPROCFS
-void ptlrpc_lprocfs_register(struct proc_dir_entry *root, char *dir,
-                             char *name, struct proc_dir_entry **procroot_ret,
-                             struct lprocfs_stats **stats_ret)
-{
-        struct proc_dir_entry *svc_procroot;
-        struct lprocfs_stats *svc_stats;
-        int i, rc;
-        unsigned int svc_counter_config = LPROCFS_CNTR_AVGMINMAX |
-                                          LPROCFS_CNTR_STDDEV;
 
-        LASSERT(*procroot_ret == NULL);
-        LASSERT(*stats_ret == NULL);
-
-        svc_stats = lprocfs_alloc_stats(EXTRA_MAX_OPCODES+LUSTRE_MAX_OPCODES,0);
-        if (svc_stats == NULL)
+static void
+ptlrpc_ldebugfs_register(struct dentry *root, char *dir, char *name,
+                        struct dentry **debugfs_root_ret,
+                        struct lprocfs_stats **stats_ret)
+{
+       struct dentry *svc_debugfs_entry;
+       struct lprocfs_stats *svc_stats;
+       int i;
+       unsigned int svc_counter_config = LPROCFS_CNTR_AVGMINMAX |
+                                         LPROCFS_CNTR_STDDEV;
+
+       LASSERT(!*debugfs_root_ret);
+       LASSERT(!*stats_ret);
+
+       svc_stats = lprocfs_alloc_stats(EXTRA_MAX_OPCODES + LUSTRE_MAX_OPCODES,
+                                       0);
+       if (!svc_stats)
                 return;
 
-        if (dir) {
-               svc_procroot = lprocfs_seq_register(dir, root, NULL, NULL);
-                if (IS_ERR(svc_procroot)) {
-                        lprocfs_free_stats(&svc_stats);
-                        return;
-                }
-        } else {
-                svc_procroot = root;
-        }
+       if (dir)
+               svc_debugfs_entry = debugfs_create_dir(dir, root);
+       else
+               svc_debugfs_entry = root;
 
         lprocfs_counter_init(svc_stats, PTLRPC_REQWAIT_CNTR,
                              svc_counter_config, "req_waittime", "usec");
@@ -224,7 +233,7 @@ void ptlrpc_lprocfs_register(struct proc_dir_entry *root, char *dir,
         for (i = 0; i < EXTRA_LAST_OPC; i++) {
                 char *units;
 
-                switch(i) {
+               switch (i) {
                 case BRW_WRITE_BYTES:
                 case BRW_READ_BYTES:
                         units = "bytes";
@@ -244,16 +253,12 @@ void ptlrpc_lprocfs_register(struct proc_dir_entry *root, char *dir,
                                      ll_opcode2str(opcode), "usec");
         }
 
-        rc = lprocfs_register_stats(svc_procroot, name, svc_stats);
-        if (rc < 0) {
-                if (dir)
-                        lprocfs_remove(&svc_procroot);
-                lprocfs_free_stats(&svc_stats);
-        } else {
-                if (dir)
-                        *procroot_ret = svc_procroot;
-                *stats_ret = svc_stats;
-        }
+       debugfs_create_file(name, 0644, svc_debugfs_entry, svc_stats,
+                           &lprocfs_stats_seq_fops);
+
+       if (dir)
+               *debugfs_root_ret = svc_debugfs_entry;
+       *stats_ret = svc_stats;
 }
 
 static int
@@ -267,9 +272,12 @@ ptlrpc_lprocfs_req_history_len_seq_show(struct seq_file *m, void *v)
        ptlrpc_service_for_each_part(svcpt, i, svc)
                total += svcpt->scp_hist_nrqbds;
 
-       return seq_printf(m, "%d\n", total);
+       seq_printf(m, "%d\n", total);
+       return 0;
 }
-LPROC_SEQ_FOPS_RO(ptlrpc_lprocfs_req_history_len);
+
+
+LDEBUGFS_SEQ_FOPS_RO(ptlrpc_lprocfs_req_history_len);
 
 static int
 ptlrpc_lprocfs_req_history_max_seq_show(struct seq_file *m, void *n)
@@ -282,7 +290,8 @@ ptlrpc_lprocfs_req_history_max_seq_show(struct seq_file *m, void *n)
        ptlrpc_service_for_each_part(svcpt, i, svc)
                total += svc->srv_hist_nrqbds_cpt_max;
 
-       return seq_printf(m, "%d\n", total);
+       seq_printf(m, "%d\n", total);
+       return 0;
 }
 
 static ssize_t
@@ -290,59 +299,103 @@ ptlrpc_lprocfs_req_history_max_seq_write(struct file *file,
                                         const char __user *buffer,
                                         size_t count, loff_t *off)
 {
-       struct seq_file         *m = file->private_data;
-       struct ptlrpc_service   *svc = m->private;
-       int                     bufpages;
-       int                     val;
-       int                     rc;
-
-       rc = lprocfs_write_helper(buffer, count, &val);
-        if (rc < 0)
-                return rc;
-
-        if (val < 0)
-                return -ERANGE;
-
-        /* This sanity check is more of an insanity check; we can still
-         * hose a kernel by allowing the request history to grow too
-         * far. */
-       bufpages = (svc->srv_buf_size + PAGE_CACHE_SIZE - 1) >>
-                                                       PAGE_CACHE_SHIFT;
-       if (val > totalram_pages/(2 * bufpages))
-                return -ERANGE;
+       struct seq_file *m = file->private_data;
+       struct ptlrpc_service *svc = m->private;
+       unsigned long long val;
+       unsigned long long limit;
+       int bufpages;
+       int rc;
+
+       rc = kstrtoull_from_user(buffer, count, 0, &val);
+       if (rc < 0)
+               return rc;
+
+       if (val < 0 || val > INT_MAX)
+               return -ERANGE;
+
+       /* This sanity check is more of an insanity check; we can still
+        * hose a kernel by allowing the request history to grow too
+        * far. The roundup to the next power of two is an empirical way
+        * to take care that request buffer is allocated in Slab and thus
+        * will be upgraded */
+       bufpages = (roundup_pow_of_two(svc->srv_buf_size) + PAGE_SIZE - 1) >>
+                                                       PAGE_SHIFT;
+       limit = cfs_totalram_pages() / (2 * bufpages);
+       /* do not allow history to consume more than half max number of rqbds */
+       if ((svc->srv_nrqbds_max == 0 && val > limit) ||
+           (svc->srv_nrqbds_max != 0 && val > svc->srv_nrqbds_max / 2))
+               return -ERANGE;
 
        spin_lock(&svc->srv_lock);
 
        if (val == 0)
                svc->srv_hist_nrqbds_cpt_max = 0;
        else
-               svc->srv_hist_nrqbds_cpt_max = max(1, (val / svc->srv_ncpts));
+               svc->srv_hist_nrqbds_cpt_max =
+                       max(1, ((int)val / svc->srv_ncpts));
 
        spin_unlock(&svc->srv_lock);
 
        return count;
 }
-LPROC_SEQ_FOPS(ptlrpc_lprocfs_req_history_max);
+
+LDEBUGFS_SEQ_FOPS(ptlrpc_lprocfs_req_history_max);
 
 static int
-ptlrpc_lprocfs_threads_min_seq_show(struct seq_file *m, void *n)
+ptlrpc_lprocfs_req_buffers_max_seq_show(struct seq_file *m, void *n)
 {
        struct ptlrpc_service *svc = m->private;
 
-       return seq_printf(m, "%d\n",
-                         svc->srv_nthrs_cpt_init * svc->srv_ncpts);
+       seq_printf(m, "%d\n", svc->srv_nrqbds_max);
+       return 0;
 }
 
 static ssize_t
-ptlrpc_lprocfs_threads_min_seq_write(struct file *file,
-                                    const char __user *buffer,
-                                    size_t count, loff_t *off)
+ptlrpc_lprocfs_req_buffers_max_seq_write(struct file *file,
+                                        const char __user *buffer,
+                                        size_t count, loff_t *off)
 {
-       struct seq_file         *m = file->private_data;
-       struct ptlrpc_service   *svc = m->private;
-       int     val;
-       int     rc = lprocfs_write_helper(buffer, count, &val);
+       struct seq_file *m = file->private_data;
+       struct ptlrpc_service *svc = m->private;
+       int val;
+       int rc;
 
+       rc = kstrtoint_from_user(buffer, count, 0, &val);
+       if (rc < 0)
+               return rc;
+
+       if (val < svc->srv_nbuf_per_group && val != 0)
+               return -ERANGE;
+
+       spin_lock(&svc->srv_lock);
+
+       svc->srv_nrqbds_max = (uint)val;
+
+       spin_unlock(&svc->srv_lock);
+
+       return count;
+}
+
+LDEBUGFS_SEQ_FOPS(ptlrpc_lprocfs_req_buffers_max);
+
+static ssize_t threads_min_show(struct kobject *kobj, struct attribute *attr,
+                               char *buf)
+{
+       struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
+                                                 srv_kobj);
+
+       return sprintf(buf, "%d\n", svc->srv_nthrs_cpt_init * svc->srv_ncpts);
+}
+
+static ssize_t threads_min_store(struct kobject *kobj, struct attribute *attr,
+                                const char *buffer, size_t count)
+{
+       struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
+                                                 srv_kobj);
+       unsigned long val;
+       int rc;
+
+       rc = kstrtoul(buffer, 10, &val);
        if (rc < 0)
                return rc;
 
@@ -355,48 +408,49 @@ ptlrpc_lprocfs_threads_min_seq_write(struct file *file,
                return -ERANGE;
        }
 
-       svc->srv_nthrs_cpt_init = val / svc->srv_ncpts;
+       svc->srv_nthrs_cpt_init = (int)val / svc->srv_ncpts;
 
        spin_unlock(&svc->srv_lock);
 
        return count;
 }
-LPROC_SEQ_FOPS(ptlrpc_lprocfs_threads_min);
+LUSTRE_RW_ATTR(threads_min);
 
-static int
-ptlrpc_lprocfs_threads_started_seq_show(struct seq_file *m, void *n)
+static ssize_t threads_started_show(struct kobject *kobj,
+                                   struct attribute *attr,
+                                   char *buf)
 {
-       struct ptlrpc_service           *svc = m->private;
-       struct ptlrpc_service_part      *svcpt;
-       int     total = 0;
-       int     i;
+       struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
+                                                 srv_kobj);
+       struct ptlrpc_service_part *svcpt;
+       int total = 0;
+       int i;
 
        ptlrpc_service_for_each_part(svcpt, i, svc)
                total += svcpt->scp_nthrs_running;
 
-       return seq_printf(m, "%d\n", total);
+       return sprintf(buf, "%d\n", total);
 }
-LPROC_SEQ_FOPS_RO(ptlrpc_lprocfs_threads_started);
+LUSTRE_RO_ATTR(threads_started);
 
-static int
-ptlrpc_lprocfs_threads_max_seq_show(struct seq_file *m, void *n)
+static ssize_t threads_max_show(struct kobject *kobj, struct attribute *attr,
+                               char *buf)
 {
-       struct ptlrpc_service *svc = m->private;
+       struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
+                                                 srv_kobj);
 
-       return seq_printf(m, "%d\n",
-                         svc->srv_nthrs_cpt_limit * svc->srv_ncpts);
+       return sprintf(buf, "%d\n", svc->srv_nthrs_cpt_limit * svc->srv_ncpts);
 }
 
-static ssize_t
-ptlrpc_lprocfs_threads_max_seq_write(struct file *file,
-                                    const char __user *buffer,
-                                    size_t count, loff_t *off)
+static ssize_t threads_max_store(struct kobject *kobj, struct attribute *attr,
+                                const char *buffer, size_t count)
 {
-       struct seq_file         *m = file->private_data;
-       struct ptlrpc_service   *svc = m->private;
-       int     val;
-       int     rc = lprocfs_write_helper(buffer, count, &val);
+       struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
+                                                 srv_kobj);
+       unsigned long val;
+       int rc;
 
+       rc = kstrtoul(buffer, 10, &val);
        if (rc < 0)
                return rc;
 
@@ -409,19 +463,13 @@ ptlrpc_lprocfs_threads_max_seq_write(struct file *file,
                return -ERANGE;
        }
 
-       svc->srv_nthrs_cpt_limit = val / svc->srv_ncpts;
+       svc->srv_nthrs_cpt_limit = (int)val / svc->srv_ncpts;
 
        spin_unlock(&svc->srv_lock);
 
        return count;
 }
-LPROC_SEQ_FOPS(ptlrpc_lprocfs_threads_max);
-
-/**
- * \addtogoup nrs
- * @{
- */
-extern struct nrs_core nrs_core;
+LUSTRE_RW_ATTR(threads_max);
 
 /**
  * Translates \e ptlrpc_nrs_pol_state values to human-readable strings.
@@ -461,7 +509,9 @@ void nrs_policy_get_info_locked(struct ptlrpc_nrs_policy *policy,
        LASSERT(info != NULL);
        assert_spin_locked(&policy->pol_nrs->nrs_lock);
 
+       BUILD_BUG_ON(sizeof(info->pi_arg) != sizeof(policy->pol_arg));
        memcpy(info->pi_name, policy->pol_desc->pd_name, NRS_POL_NAME_MAX);
+       memcpy(info->pi_arg, policy->pol_arg, sizeof(policy->pol_arg));
 
        info->pi_fallback    = !!(policy->pol_flags & PTLRPC_NRS_FL_FALLBACK);
        info->pi_state       = policy->pol_state;
@@ -509,7 +559,7 @@ static int ptlrpc_lprocfs_nrs_seq_show(struct seq_file *m, void *n)
        num_pols = svc->srv_parts[0]->scp_nrs_reg.nrs_num_pols;
        spin_unlock(&nrs->nrs_lock);
 
-       OBD_ALLOC(infos, num_pols * sizeof(*infos));
+       OBD_ALLOC_PTR_ARRAY(infos, num_pols);
        if (infos == NULL)
                GOTO(out, rc = -ENOMEM);
 again:
@@ -532,6 +582,8 @@ again:
                        if (i == 0) {
                                memcpy(infos[pol_idx].pi_name, tmp.pi_name,
                                       NRS_POL_NAME_MAX);
+                               memcpy(infos[pol_idx].pi_arg, tmp.pi_arg,
+                                      sizeof(tmp.pi_arg));
                                memcpy(&infos[pol_idx].pi_state, &tmp.pi_state,
                                       sizeof(tmp.pi_state));
                                infos[pol_idx].pi_fallback = tmp.pi_fallback;
@@ -543,6 +595,9 @@ again:
                                LASSERT(strncmp(infos[pol_idx].pi_name,
                                                tmp.pi_name,
                                                NRS_POL_NAME_MAX) == 0);
+                               LASSERT(strncmp(infos[pol_idx].pi_arg,
+                                               tmp.pi_arg,
+                                               sizeof(tmp.pi_arg)) == 0);
                                /**
                                 * Not asserting ptlrpc_nrs_pol_info::pi_state,
                                 * because it may be different between
@@ -595,16 +650,23 @@ again:
                   "high_priority_requests:");
 
        for (pol_idx = 0; pol_idx < num_pols; pol_idx++) {
-               seq_printf(m, "  - name: %s\n"
-                             "    state: %s\n"
-                             "    fallback: %s\n"
-                             "    queued: %-20d\n"
-                             "    active: %-20d\n\n",
-                             infos[pol_idx].pi_name,
-                             nrs_state2str(infos[pol_idx].pi_state),
-                             infos[pol_idx].pi_fallback ? "yes" : "no",
-                             (int)infos[pol_idx].pi_req_queued,
-                             (int)infos[pol_idx].pi_req_started);
+               if (strlen(infos[pol_idx].pi_arg) > 0)
+                       seq_printf(m, "  - name: %s %s\n",
+                                  infos[pol_idx].pi_name,
+                                  infos[pol_idx].pi_arg);
+               else
+                       seq_printf(m, "  - name: %s\n",
+                                  infos[pol_idx].pi_name);
+
+
+               seq_printf(m, "    state: %s\n"
+                          "    fallback: %s\n"
+                          "    queued: %-20d\n"
+                          "    active: %-20d\n\n",
+                          nrs_state2str(infos[pol_idx].pi_state),
+                          infos[pol_idx].pi_fallback ? "yes" : "no",
+                          (int)infos[pol_idx].pi_req_queued,
+                          (int)infos[pol_idx].pi_req_started);
        }
 
        if (!hp && nrs_svc_has_hp(svc)) {
@@ -619,7 +681,7 @@ again:
 
 out:
        if (infos)
-               OBD_FREE(infos, num_pols * sizeof(*infos));
+               OBD_FREE_PTR_ARRAY(infos, num_pols);
 
        mutex_unlock(&nrs_core.nrs_mutex);
 
@@ -722,7 +784,8 @@ out:
 
        RETURN(rc < 0 ? rc : count);
 }
-LPROC_SEQ_FOPS(ptlrpc_lprocfs_nrs);
+
+LDEBUGFS_SEQ_FOPS(ptlrpc_lprocfs_nrs);
 
 /** @} nrs */
 
@@ -732,7 +795,7 @@ struct ptlrpc_srh_iterator {
        struct ptlrpc_request   *srhi_req;
 };
 
-int
+static int
 ptlrpc_lprocfs_svc_req_history_seek(struct ptlrpc_service_part *svcpt,
                                    struct ptlrpc_srh_iterator *srhi,
                                    __u64 seq)
@@ -750,12 +813,12 @@ ptlrpc_lprocfs_svc_req_history_seek(struct ptlrpc_service_part *svcpt,
                  * be near the head), we shouldn't have to do long
                  * re-scans */
                LASSERTF(srhi->srhi_seq == srhi->srhi_req->rq_history_seq,
-                        "%s:%d: seek seq "LPU64", request seq "LPU64"\n",
+                        "%s:%d: seek seq %llu, request seq %llu\n",
                         svcpt->scp_service->srv_name, svcpt->scp_cpt,
                         srhi->srhi_seq, srhi->srhi_req->rq_history_seq);
                LASSERTF(!list_empty(&svcpt->scp_hist_reqs),
-                        "%s:%d: seek offset "LPU64", request seq "LPU64", "
-                        "last culled "LPU64"\n",
+                        "%s:%d: seek offset %llu, request seq %llu, "
+                        "last culled %llu\n",
                         svcpt->scp_service->srv_name, svcpt->scp_cpt,
                         seq, srhi->srhi_seq, svcpt->scp_hist_seq_culled);
                e = &srhi->srhi_req->rq_history_list;
@@ -842,10 +905,12 @@ ptlrpc_lprocfs_svc_req_history_start(struct seq_file *s, loff_t *pos)
                if (i > cpt) /* make up the lowest position for this CPT */
                        *pos = PTLRPC_REQ_CPT2POS(svc, i);
 
+               mutex_lock(&svcpt->scp_mutex);
                spin_lock(&svcpt->scp_lock);
                rc = ptlrpc_lprocfs_svc_req_history_seek(svcpt, srhi,
                                PTLRPC_REQ_POS2SEQ(svc, *pos));
                spin_unlock(&svcpt->scp_lock);
+               mutex_unlock(&svcpt->scp_mutex);
                if (rc == 0) {
                        *pos = PTLRPC_REQ_SEQ2POS(svc, srhi->srhi_seq);
                        srhi->srhi_idx = i;
@@ -887,9 +952,11 @@ ptlrpc_lprocfs_svc_req_history_next(struct seq_file *s,
                        seq = srhi->srhi_seq + (1 << svc->srv_cpt_bits);
                }
 
+               mutex_lock(&svcpt->scp_mutex);
                spin_lock(&svcpt->scp_lock);
                rc = ptlrpc_lprocfs_svc_req_history_seek(svcpt, srhi, seq);
                spin_unlock(&svcpt->scp_lock);
+               mutex_unlock(&svcpt->scp_mutex);
                if (rc == 0) {
                        *pos = PTLRPC_REQ_SEQ2POS(svc, srhi->srhi_seq);
                        srhi->srhi_idx = i;
@@ -943,33 +1010,53 @@ static int ptlrpc_lprocfs_svc_req_history_show(struct seq_file *s, void *iter)
 
        svcpt = svc->srv_parts[srhi->srhi_idx];
 
+       mutex_lock(&svcpt->scp_mutex);
        spin_lock(&svcpt->scp_lock);
 
        rc = ptlrpc_lprocfs_svc_req_history_seek(svcpt, srhi, srhi->srhi_seq);
 
-        if (rc == 0) {
-                req = srhi->srhi_req;
-
-                /* Print common req fields.
-                 * CAVEAT EMPTOR: we're racing with the service handler
-                 * here.  The request could contain any old crap, so you
-                 * must be just as careful as the service's request
-                 * parser. Currently I only print stuff here I know is OK
-                 * to look at coz it was set up in request_in_callback()!!! */
-                seq_printf(s, LPD64":%s:%s:x"LPU64":%d:%s:%ld:%lds(%+lds) ",
-                           req->rq_history_seq, libcfs_nid2str(req->rq_self),
-                           libcfs_id2str(req->rq_peer), req->rq_xid,
-                           req->rq_reqlen, ptlrpc_rqphase2str(req),
-                           req->rq_arrival_time.tv_sec,
-                           req->rq_sent - req->rq_arrival_time.tv_sec,
-                           req->rq_sent - req->rq_deadline);
+       if (rc == 0) {
+               struct timespec64 arrival, sent, arrivaldiff;
+               char nidstr[LNET_NIDSTR_SIZE];
+
+               req = srhi->srhi_req;
+
+               arrival.tv_sec = req->rq_arrival_time.tv_sec;
+               arrival.tv_nsec = req->rq_arrival_time.tv_nsec;
+               sent.tv_sec = req->rq_sent;
+               sent.tv_nsec = 0;
+               arrivaldiff = timespec64_sub(sent, arrival);
+
+               /* Print common req fields.
+                * CAVEAT EMPTOR: we're racing with the service handler
+                * here.  The request could contain any old crap, so you
+                * must be just as careful as the service's request
+                * parser. Currently I only print stuff here I know is OK
+                * to look at coz it was set up in request_in_callback()!!!
+                */
+               seq_printf(s,
+                          "%lld:%s:%s:x%llu:%d:%s:%lld.%06lld:%lld.%06llds(%+lld.0s) ",
+                          req->rq_history_seq,
+                          req->rq_export && req->rq_export->exp_obd ?
+                               req->rq_export->exp_obd->obd_name :
+                               libcfs_nid2str_r(req->rq_self, nidstr,
+                                                sizeof(nidstr)),
+                          libcfs_id2str(req->rq_peer), req->rq_xid,
+                          req->rq_reqlen, ptlrpc_rqphase2str(req),
+                          (s64)req->rq_arrival_time.tv_sec,
+                          (s64)(req->rq_arrival_time.tv_nsec / NSEC_PER_USEC),
+                          (s64)arrivaldiff.tv_sec,
+                          (s64)(arrivaldiff.tv_nsec / NSEC_PER_USEC),
+                          (s64)(req->rq_sent - req->rq_deadline));
                if (svc->srv_ops.so_req_printer == NULL)
                        seq_printf(s, "\n");
                else
                        svc->srv_ops.so_req_printer(s, srhi->srhi_req);
-        }
+       }
 
        spin_unlock(&svcpt->scp_lock);
+       mutex_unlock(&svcpt->scp_mutex);
+
        return rc;
 }
 
@@ -985,26 +1072,24 @@ ptlrpc_lprocfs_svc_req_history_open(struct inode *inode, struct file *file)
        struct seq_file *seqf;
        int             rc;
 
-       LPROCFS_ENTRY_CHECK(PDE(inode));
        rc = seq_open(file, &sops);
        if (rc)
                return rc;
 
        seqf = file->private_data;
-       seqf->private = PDE_DATA(inode);
+       seqf->private = inode->i_private;
        return 0;
 }
 
 /* See also lprocfs_rd_timeouts */
 static int ptlrpc_lprocfs_timeouts_seq_show(struct seq_file *m, void *n)
 {
-       struct ptlrpc_service           *svc = m->private;
-       struct ptlrpc_service_part      *svcpt;
-       struct dhms                     ts;
-       time_t                          worstt;
-       unsigned int                    cur;
-       unsigned int                    worst;
-       int                             i;
+       struct ptlrpc_service *svc = m->private;
+       struct ptlrpc_service_part *svcpt;
+       time64_t worst_timestamp;
+       timeout_t cur_timeout;
+       timeout_t worst_timeout;
+       int i;
 
        if (AT_OFF) {
                seq_printf(m, "adaptive timeouts off, using obd_timeout %u\n",
@@ -1013,80 +1098,114 @@ static int ptlrpc_lprocfs_timeouts_seq_show(struct seq_file *m, void *n)
        }
 
        ptlrpc_service_for_each_part(svcpt, i, svc) {
-               cur     = at_get(&svcpt->scp_at_estimate);
-               worst   = svcpt->scp_at_estimate.at_worst_ever;
-               worstt  = svcpt->scp_at_estimate.at_worst_time;
-               s2dhms(&ts, cfs_time_current_sec() - worstt);
+               cur_timeout = at_get(&svcpt->scp_at_estimate);
+               worst_timeout = svcpt->scp_at_estimate.at_worst_timeout_ever;
+               worst_timestamp = svcpt->scp_at_estimate.at_worst_timestamp;
 
-               seq_printf(m, "%10s : cur %3u  worst %3u (at %ld, "
-                          DHMS_FMT" ago) ", "service",
-                          cur, worst, worstt, DHMS_VARS(&ts));
+               seq_printf(m, "%10s : cur %3u  worst %3u (at %lld, %llds ago) ",
+                          "service", cur_timeout, worst_timeout,
+                          worst_timestamp,
+                          ktime_get_real_seconds() - worst_timestamp);
 
-               lprocfs_seq_at_hist_helper(m, &svcpt->scp_at_estimate);
+               lprocfs_at_hist_helper(m, &svcpt->scp_at_estimate);
        }
 
        return 0;
 }
-LPROC_SEQ_FOPS_RO(ptlrpc_lprocfs_timeouts);
 
-static int ptlrpc_lprocfs_hp_ratio_seq_show(struct seq_file *m, void *v)
+LDEBUGFS_SEQ_FOPS_RO(ptlrpc_lprocfs_timeouts);
+
+static ssize_t high_priority_ratio_show(struct kobject *kobj,
+                                       struct attribute *attr,
+                                       char *buf)
 {
-       struct ptlrpc_service *svc = m->private;
-       return seq_printf(m, "%d\n", svc->srv_hpreq_ratio);
+       struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
+                                                 srv_kobj);
+
+       return sprintf(buf, "%d\n", svc->srv_hpreq_ratio);
 }
 
-static ssize_t
-ptlrpc_lprocfs_hp_ratio_seq_write(struct file *file, const char __user *buffer,
-                                 size_t count, loff_t *off)
+static ssize_t high_priority_ratio_store(struct kobject *kobj,
+                                        struct attribute *attr,
+                                        const char *buffer,
+                                        size_t count)
 {
-       struct seq_file         *m = file->private_data;
-       struct ptlrpc_service   *svc = m->private;
-       int     rc;
-       int     val;
+       struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
+                                                 srv_kobj);
+       int rc;
+       unsigned long val;
 
-       rc = lprocfs_write_helper(buffer, count, &val);
+       rc = kstrtoul(buffer, 10, &val);
        if (rc < 0)
                return rc;
 
-       if (val < 0)
-               return -ERANGE;
-
        spin_lock(&svc->srv_lock);
        svc->srv_hpreq_ratio = val;
        spin_unlock(&svc->srv_lock);
 
        return count;
 }
-LPROC_SEQ_FOPS(ptlrpc_lprocfs_hp_ratio);
+LUSTRE_RW_ATTR(high_priority_ratio);
+
+static struct attribute *ptlrpc_svc_attrs[] = {
+       &lustre_attr_threads_min.attr,
+       &lustre_attr_threads_started.attr,
+       &lustre_attr_threads_max.attr,
+       &lustre_attr_high_priority_ratio.attr,
+       NULL,
+};
 
-void ptlrpc_lprocfs_register_service(struct proc_dir_entry *entry,
-                                     struct ptlrpc_service *svc)
+static void ptlrpc_sysfs_svc_release(struct kobject *kobj)
 {
-       struct lprocfs_seq_vars lproc_vars[] = {
-               { .name = "high_priority_ratio",
-                 .fops = &ptlrpc_lprocfs_hp_ratio_fops,
-                 .data = svc },
+       struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
+                                                 srv_kobj);
+
+       complete(&svc->srv_kobj_unregister);
+}
+
+static struct kobj_type ptlrpc_svc_ktype = {
+       .default_attrs  = ptlrpc_svc_attrs,
+       .sysfs_ops      = &lustre_sysfs_ops,
+       .release        = ptlrpc_sysfs_svc_release,
+};
+
+void ptlrpc_sysfs_unregister_service(struct ptlrpc_service *svc)
+{
+       /* Let's see if we had a chance at initialization first */
+       if (svc->srv_kobj.kset) {
+               kobject_put(&svc->srv_kobj);
+               wait_for_completion(&svc->srv_kobj_unregister);
+       }
+}
+
+int ptlrpc_sysfs_register_service(struct kset *parent,
+                                 struct ptlrpc_service *svc)
+{
+       svc->srv_kobj.kset = parent;
+       init_completion(&svc->srv_kobj_unregister);
+       return kobject_init_and_add(&svc->srv_kobj, &ptlrpc_svc_ktype,
+                                   &parent->kobj, "%s", svc->srv_name);
+}
+
+void ptlrpc_ldebugfs_register_service(struct dentry *entry,
+                                     struct ptlrpc_service *svc)
+{
+       struct lprocfs_vars lproc_vars[] = {
                { .name = "req_buffer_history_len",
                  .fops = &ptlrpc_lprocfs_req_history_len_fops,
                  .data = svc },
                { .name = "req_buffer_history_max",
                  .fops = &ptlrpc_lprocfs_req_history_max_fops,
                  .data = svc },
-               { .name = "threads_min",
-                 .fops = &ptlrpc_lprocfs_threads_min_fops,
-                 .data = svc },
-               { .name = "threads_max",
-                 .fops = &ptlrpc_lprocfs_threads_max_fops,
-                 .data = svc },
-               { .name = "threads_started",
-                 .fops = &ptlrpc_lprocfs_threads_started_fops,
-                 .data = svc },
                { .name = "timeouts",
                  .fops = &ptlrpc_lprocfs_timeouts_fops,
                  .data = svc },
                { .name = "nrs_policies",
                  .fops = &ptlrpc_lprocfs_nrs_fops,
                  .data = svc },
+               { .name = "req_buffers_max",
+                 .fops = &ptlrpc_lprocfs_req_buffers_max_fops,
+                 .data = svc },
                { NULL }
         };
         static struct file_operations req_history_fops = {
@@ -1097,27 +1216,22 @@ void ptlrpc_lprocfs_register_service(struct proc_dir_entry *entry,
                 .release     = lprocfs_seq_release,
         };
 
-        int rc;
-
-        ptlrpc_lprocfs_register(entry, svc->srv_name,
-                               "stats", &svc->srv_procroot,
-                               &svc->srv_stats);
-       if (svc->srv_procroot == NULL)
+       ptlrpc_ldebugfs_register(entry, svc->srv_name, "stats",
+                                &svc->srv_debugfs_entry, &svc->srv_stats);
+       if (!svc->srv_debugfs_entry)
                return;
 
-       lprocfs_seq_add_vars(svc->srv_procroot, lproc_vars, NULL);
+       ldebugfs_add_vars(svc->srv_debugfs_entry, lproc_vars, NULL);
 
-       rc = lprocfs_seq_create(svc->srv_procroot, "req_history",
-                               0400, &req_history_fops, svc);
-       if (rc)
-               CWARN("Error adding the req_history file\n");
+       debugfs_create_file("req_history", 0400, svc->srv_debugfs_entry, svc,
+                           &req_history_fops);
 }
 
-void ptlrpc_lprocfs_register_obd(struct obd_device *obddev)
+void ptlrpc_lprocfs_register_obd(struct obd_device *obd)
 {
-        ptlrpc_lprocfs_register(obddev->obd_proc_entry, NULL, "stats",
-                                &obddev->obd_svc_procroot,
-                                &obddev->obd_svc_stats);
+       ptlrpc_ldebugfs_register(obd->obd_debugfs_entry, NULL, "stats",
+                                &obd->obd_svc_debugfs_entry,
+                                &obd->obd_svc_stats);
 }
 EXPORT_SYMBOL(ptlrpc_lprocfs_register_obd);
 
@@ -1165,49 +1279,62 @@ EXPORT_SYMBOL(ptlrpc_lprocfs_brw);
 
 void ptlrpc_lprocfs_unregister_service(struct ptlrpc_service *svc)
 {
-        if (svc->srv_procroot != NULL)
-                lprocfs_remove(&svc->srv_procroot);
+       debugfs_remove_recursive(svc->srv_debugfs_entry);
 
-        if (svc->srv_stats)
-                lprocfs_free_stats(&svc->srv_stats);
+       if (svc->srv_stats)
+               lprocfs_free_stats(&svc->srv_stats);
 }
 
 void ptlrpc_lprocfs_unregister_obd(struct obd_device *obd)
 {
-        if (obd->obd_svc_procroot)
-                lprocfs_remove(&obd->obd_svc_procroot);
+       /* cleanup first to allow concurrent access to device's
+        * stats via debugfs to complete safely
+        */
+       lprocfs_obd_cleanup(obd);
+
+       debugfs_remove_recursive(obd->obd_svc_debugfs_entry);
 
-        if (obd->obd_svc_stats)
-                lprocfs_free_stats(&obd->obd_svc_stats);
+       if (obd->obd_svc_stats)
+               lprocfs_free_stats(&obd->obd_svc_stats);
 }
 EXPORT_SYMBOL(ptlrpc_lprocfs_unregister_obd);
 
-ssize_t
-lprocfs_ping_seq_write(struct file *file, const char *buffer,
-                      size_t count, loff_t *off)
+ssize_t ping_show(struct kobject *kobj, struct attribute *attr,
+                 char *buffer)
 {
-       struct seq_file         *m = file->private_data;
-       struct obd_device       *obd = m->private;
-       struct ptlrpc_request   *req;
-       int                     rc;
+       struct obd_device *obd = container_of(kobj, struct obd_device,
+                                             obd_kset.kobj);
+       struct obd_import *imp;
+       struct ptlrpc_request *req;
+       int rc;
+
        ENTRY;
+       with_imp_locked(obd, imp, rc)
+               req = ptlrpc_prep_ping(imp);
 
-       LPROCFS_CLIMP_CHECK(obd);
-       req = ptlrpc_prep_ping(obd->u.cli.cl_import);
-       LPROCFS_CLIMP_EXIT(obd);
-       if (req == NULL)
+       if (rc)
+               RETURN(rc);
+       if (!req)
                RETURN(-ENOMEM);
 
        req->rq_send_state = LUSTRE_IMP_FULL;
 
        rc = ptlrpc_queue_wait(req);
-
        ptlrpc_req_finished(req);
-       if (rc >= 0)
-               RETURN(count);
+
        RETURN(rc);
 }
-EXPORT_SYMBOL(lprocfs_ping_seq_write);
+EXPORT_SYMBOL(ping_show);
+
+/* kept for older verison of tools. */
+ssize_t ping_store(struct kobject *kobj, struct attribute *attr,
+                  const char *buffer, size_t count)
+{
+       int rc = ping_show(kobj, attr, (char *)buffer);
+
+       return (rc < 0) ? rc : count;
+}
+EXPORT_SYMBOL(ping_store);
 
 /* Write the connection UUID to this file to attempt to connect to that node.
  * The connection UUID is a node's primary NID. For example,
@@ -1219,15 +1346,16 @@ lprocfs_import_seq_write(struct file *file, const char __user *buffer,
 {
        struct seq_file   *m    = file->private_data;
        struct obd_device *obd  = m->private;
-       struct obd_import *imp  = obd->u.cli.cl_import;
+       struct obd_import *imp;
        char *kbuf = NULL;
        char *uuid;
        char *ptr;
        int do_reconn = 1;
        const char prefix[] = "connection=";
        const int prefix_len = sizeof(prefix) - 1;
+       int rc = 0;
 
-       if (count > PAGE_CACHE_SIZE - 1 || count <= prefix_len)
+       if (count > PAGE_SIZE - 1 || count <= prefix_len)
                return -EINVAL;
 
        OBD_ALLOC(kbuf, count + 1);
@@ -1235,85 +1363,85 @@ lprocfs_import_seq_write(struct file *file, const char __user *buffer,
                return -ENOMEM;
 
        if (copy_from_user(kbuf, buffer, count))
-               GOTO(out, count = -EFAULT);
+               GOTO(out, rc = -EFAULT);
 
        kbuf[count] = 0;
 
        /* only support connection=uuid::instance now */
        if (strncmp(prefix, kbuf, prefix_len) != 0)
-               GOTO(out, count = -EINVAL);
-
-       uuid = kbuf + prefix_len;
-       ptr = strstr(uuid, "::");
-       if (ptr) {
-               __u32 inst;
-               char *endptr;
-
-               *ptr = 0;
-               do_reconn = 0;
-               ptr += 2; /* Skip :: */
-               inst = simple_strtol(ptr, &endptr, 10);
-               if (*endptr) {
-                       CERROR("config: wrong instance # %s\n", ptr);
-               } else if (inst != imp->imp_connect_data.ocd_instance) {
-                       CDEBUG(D_INFO, "IR: %s is connecting to an obsoleted "
-                              "target(%u/%u), reconnecting...\n",
-                              imp->imp_obd->obd_name,
-                              imp->imp_connect_data.ocd_instance, inst);
-                       do_reconn = 1;
-               } else {
-                       CDEBUG(D_INFO, "IR: %s has already been connecting to "
-                              "new target(%u)\n",
-                              imp->imp_obd->obd_name, inst);
+               GOTO(out, rc = -EINVAL);
+
+       with_imp_locked(obd, imp, rc) {
+               uuid = kbuf + prefix_len;
+               ptr = strstr(uuid, "::");
+               if (ptr) {
+                       u32 inst;
+                       int rc;
+
+                       *ptr = 0;
+                       do_reconn = 0;
+                       ptr += 2; /* Skip :: */
+                       rc = kstrtouint(ptr, 10, &inst);
+                       if (rc) {
+                               CERROR("config: wrong instance # %s\n", ptr);
+                       } else if (inst != imp->imp_connect_data.ocd_instance) {
+                               CDEBUG(D_INFO,
+                                      "IR: %s is connecting to an obsoleted target(%u/%u), reconnecting...\n",
+                                      imp->imp_obd->obd_name,
+                                      imp->imp_connect_data.ocd_instance,
+                                      inst);
+                               do_reconn = 1;
+                       } else {
+                               CDEBUG(D_INFO,
+                                      "IR: %s has already been connecting to "
+                                      "new target(%u)\n",
+                                      imp->imp_obd->obd_name, inst);
+                       }
                }
-       }
 
-       if (do_reconn)
-               ptlrpc_recover_import(imp, uuid, 1);
+               if (do_reconn)
+                       ptlrpc_recover_import(imp, uuid, 1);
+       }
 
 out:
        OBD_FREE(kbuf, count + 1);
-       return count;
+       return rc ?: count;
 }
 EXPORT_SYMBOL(lprocfs_import_seq_write);
 
 int lprocfs_pinger_recov_seq_show(struct seq_file *m, void *n)
 {
        struct obd_device *obd = m->private;
-       struct obd_import *imp = obd->u.cli.cl_import;
+       struct obd_import *imp;
        int rc;
 
-       LPROCFS_CLIMP_CHECK(obd);
-       rc = seq_printf(m, "%d\n", !imp->imp_no_pinger_recover);
-       LPROCFS_CLIMP_EXIT(obd);
+       with_imp_locked(obd, imp, rc)
+               seq_printf(m, "%d\n", !imp->imp_no_pinger_recover);
+
        return rc;
 }
 EXPORT_SYMBOL(lprocfs_pinger_recov_seq_show);
 
 ssize_t
-lprocfs_pinger_recov_seq_write(struct file *file, const char *buffer,
+lprocfs_pinger_recov_seq_write(struct file *file, const char __user *buffer,
                               size_t count, loff_t *off)
 {
-       struct seq_file   *m    = file->private_data;
-       struct obd_device *obd  = m->private;
-       struct client_obd *cli  = &obd->u.cli;
-       struct obd_import *imp  = cli->cl_import;
-       int rc, val;
+       struct seq_file *m = file->private_data;
+       struct obd_device *obd = m->private;
+       struct obd_import *imp;
+       bool val;
+       int rc;
 
-       rc = lprocfs_write_helper(buffer, count, &val);
+       rc = kstrtobool_from_user(buffer, count, &val);
        if (rc < 0)
                return rc;
 
-       if (val != 0 && val != 1)
-               return -ERANGE;
+       with_imp_locked(obd, imp, rc) {
+               spin_lock(&imp->imp_lock);
+               imp->imp_no_pinger_recover = !val;
+               spin_unlock(&imp->imp_lock);
+       }
 
-       LPROCFS_CLIMP_CHECK(obd);
-       spin_lock(&imp->imp_lock);
-       imp->imp_no_pinger_recover = !val;
-       spin_unlock(&imp->imp_lock);
-       LPROCFS_CLIMP_EXIT(obd);
-       return count;
+       return rc ?: count;
 }
 EXPORT_SYMBOL(lprocfs_pinger_recov_seq_write);
-
-#endif /* LPROCFS */