--- /dev/null
+/*
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
+ *
+ * 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.
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2012, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ */
+
+#define DEBUG_SUBSYSTEM S_MDC
+
+# include <linux/module.h>
+# include <linux/pagemap.h>
+# include <linux/miscdevice.h>
+# include <linux/init.h>
+# include <linux/utsname.h>
+
+#include "../include/lustre_acl.h"
+#include "../include/obd_class.h"
+#include "../include/lustre_fid.h"
+#include "../include/lprocfs_status.h"
+#include "../include/lustre_param.h"
+#include "../include/lustre_log.h"
+
+#include "mdc_internal.h"
+
+#define REQUEST_MINOR 244
+
+struct mdc_renew_capa_args {
+ struct obd_capa *ra_oc;
+ renew_capa_cb_t ra_cb;
+};
+
+static int mdc_cleanup(struct obd_device *obd);
+
+static int mdc_unpack_capa(struct obd_export *exp, struct ptlrpc_request *req,
+ const struct req_msg_field *field, struct obd_capa **oc)
+{
+ struct lustre_capa *capa;
+ struct obd_capa *c;
+
+ /* swabbed already in mdc_enqueue */
+ capa = req_capsule_server_get(&req->rq_pill, field);
+ if (capa == NULL)
+ return -EPROTO;
+
+ c = alloc_capa(CAPA_SITE_CLIENT);
+ if (IS_ERR(c)) {
+ CDEBUG(D_INFO, "alloc capa failed!\n");
+ return PTR_ERR(c);
+ } else {
+ c->c_capa = *capa;
+ *oc = c;
+ return 0;
+ }
+}
+
+static inline int mdc_queue_wait(struct ptlrpc_request *req)
+{
+ struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
+ int rc;
+
+ /* mdc_enter_request() ensures that this client has no more
+ * than cl_max_rpcs_in_flight RPCs simultaneously inf light
+ * against an MDT. */
+ rc = mdc_enter_request(cli);
+ if (rc != 0)
+ return rc;
+
+ rc = ptlrpc_queue_wait(req);
+ mdc_exit_request(cli);
+
+ return rc;
+}
+
+/* Helper that implements most of mdc_getstatus and signal_completed_replay. */
+/* XXX this should become mdc_get_info("key"), sending MDS_GET_INFO RPC */
+static int send_getstatus(struct obd_import *imp, struct lu_fid *rootfid,
+ struct obd_capa **pc, int level, int msg_flags)
+{
+ struct ptlrpc_request *req;
+ struct mdt_body *body;
+ int rc;
+
+ req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_GETSTATUS,
+ LUSTRE_MDS_VERSION, MDS_GETSTATUS);
+ if (req == NULL)
+ return -ENOMEM;
+
+ mdc_pack_body(req, NULL, NULL, 0, 0, -1, 0);
+ lustre_msg_add_flags(req->rq_reqmsg, msg_flags);
+ req->rq_send_state = level;
+
+ ptlrpc_request_set_replen(req);
+
+ rc = ptlrpc_queue_wait(req);
+ if (rc)
+ goto out;
+
+ body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
+ if (body == NULL) {
+ rc = -EPROTO;
+ goto out;
+ }
+
+ if (body->valid & OBD_MD_FLMDSCAPA) {
+ rc = mdc_unpack_capa(NULL, req, &RMF_CAPA1, pc);
+ if (rc)
+ goto out;
+ }
+
+ *rootfid = body->fid1;
+ CDEBUG(D_NET,
+ "root fid="DFID", last_committed=%llu\n",
+ PFID(rootfid),
+ lustre_msg_get_last_committed(req->rq_repmsg));
+out:
+ ptlrpc_req_finished(req);
+ return rc;
+}
+
+/* This should be mdc_get_info("rootfid") */
+static int mdc_getstatus(struct obd_export *exp, struct lu_fid *rootfid,
+ struct obd_capa **pc)
+{
+ return send_getstatus(class_exp2cliimp(exp), rootfid, pc,
+ LUSTRE_IMP_FULL, 0);
+}
+
+/*
+ * This function now is known to always saying that it will receive 4 buffers
+ * from server. Even for cases when acl_size and md_size is zero, RPC header
+ * will contain 4 fields and RPC itself will contain zero size fields. This is
+ * because mdt_getattr*() _always_ returns 4 fields, but if acl is not needed
+ * and thus zero, it shrinks it, making zero size. The same story about
+ * md_size. And this is course of problem when client waits for smaller number
+ * of fields. This issue will be fixed later when client gets aware of RPC
+ * layouts. --umka
+ */
+static int mdc_getattr_common(struct obd_export *exp,
+ struct ptlrpc_request *req)
+{
+ struct req_capsule *pill = &req->rq_pill;
+ struct mdt_body *body;
+ void *eadata;
+ int rc;
+
+ /* Request message already built. */
+ rc = ptlrpc_queue_wait(req);
+ if (rc != 0)
+ return rc;
+
+ /* sanity check for the reply */
+ body = req_capsule_server_get(pill, &RMF_MDT_BODY);
+ if (body == NULL)
+ return -EPROTO;
+
+ CDEBUG(D_NET, "mode: %o\n", body->mode);
+
+ if (body->eadatasize != 0) {
+ mdc_update_max_ea_from_body(exp, body);
+
+ eadata = req_capsule_server_sized_get(pill, &RMF_MDT_MD,
+ body->eadatasize);
+ if (eadata == NULL)
+ return -EPROTO;
+ }
+
+ if (body->valid & OBD_MD_FLRMTPERM) {
+ struct mdt_remote_perm *perm;
+
+ LASSERT(client_is_remote(exp));
+ perm = req_capsule_server_swab_get(pill, &RMF_ACL,
+ lustre_swab_mdt_remote_perm);
+ if (perm == NULL)
+ return -EPROTO;
+ }
+
+ if (body->valid & OBD_MD_FLMDSCAPA) {
+ struct lustre_capa *capa;
+
+ capa = req_capsule_server_get(pill, &RMF_CAPA1);
+ if (capa == NULL)
+ return -EPROTO;
+ }
+
+ return 0;
+}
+
+static int mdc_getattr(struct obd_export *exp, struct md_op_data *op_data,
+ struct ptlrpc_request **request)
+{
+ struct ptlrpc_request *req;
+ int rc;
+
+ /* Single MDS without an LMV case */
+ if (op_data->op_flags & MF_GET_MDT_IDX) {
+ op_data->op_mds = 0;
+ return 0;
+ }
+ *request = NULL;
+ req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_GETATTR);
+ if (req == NULL)
+ return -ENOMEM;
+
+ mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
+
+ rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GETATTR);
+ if (rc) {
+ ptlrpc_request_free(req);
+ return rc;
+ }
+
+ mdc_pack_body(req, &op_data->op_fid1, op_data->op_capa1,
+ op_data->op_valid, op_data->op_mode, -1, 0);
+
+ req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
+ op_data->op_mode);
+ if (op_data->op_valid & OBD_MD_FLRMTPERM) {
+ LASSERT(client_is_remote(exp));
+ req_capsule_set_size(&req->rq_pill, &RMF_ACL, RCL_SERVER,
+ sizeof(struct mdt_remote_perm));
+ }
+ ptlrpc_request_set_replen(req);
+
+ rc = mdc_getattr_common(exp, req);
+ if (rc)
+ ptlrpc_req_finished(req);
+ else
+ *request = req;
+ return rc;
+}
+
+static int mdc_getattr_name(struct obd_export *exp, struct md_op_data *op_data,
+ struct ptlrpc_request **request)
+{
+ struct ptlrpc_request *req;
+ int rc;
+
+ *request = NULL;
+ req = ptlrpc_request_alloc(class_exp2cliimp(exp),
+ &RQF_MDS_GETATTR_NAME);
+ if (req == NULL)
+ return -ENOMEM;
+
+ mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
+ req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
+ op_data->op_namelen + 1);
+
+ rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GETATTR_NAME);
+ if (rc) {
+ ptlrpc_request_free(req);
+ return rc;
+ }
+
+ mdc_pack_body(req, &op_data->op_fid1, op_data->op_capa1,
+ op_data->op_valid, op_data->op_mode,
+ op_data->op_suppgids[0], 0);
+
+ if (op_data->op_name) {
+ char *name = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
+
+ LASSERT(strnlen(op_data->op_name, op_data->op_namelen) ==
+ op_data->op_namelen);
+ memcpy(name, op_data->op_name, op_data->op_namelen);
+ }
+
+ req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
+ op_data->op_mode);
+ ptlrpc_request_set_replen(req);
+
+ rc = mdc_getattr_common(exp, req);
+ if (rc)
+ ptlrpc_req_finished(req);
+ else
+ *request = req;
+ return rc;
+}
+
+static int mdc_is_subdir(struct obd_export *exp,
+ const struct lu_fid *pfid,
+ const struct lu_fid *cfid,
+ struct ptlrpc_request **request)
+{
+ struct ptlrpc_request *req;
+ int rc;
+
+ *request = NULL;
+ req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
+ &RQF_MDS_IS_SUBDIR, LUSTRE_MDS_VERSION,
+ MDS_IS_SUBDIR);
+ if (req == NULL)
+ return -ENOMEM;
+
+ mdc_is_subdir_pack(req, pfid, cfid, 0);
+ ptlrpc_request_set_replen(req);
+
+ rc = ptlrpc_queue_wait(req);
+ if (rc && rc != -EREMOTE)
+ ptlrpc_req_finished(req);
+ else
+ *request = req;
+ return rc;
+}
+
+static int mdc_xattr_common(struct obd_export *exp,
+ const struct req_format *fmt,
+ const struct lu_fid *fid,
+ struct obd_capa *oc, int opcode, u64 valid,
+ const char *xattr_name, const char *input,
+ int input_size, int output_size, int flags,
+ __u32 suppgid, struct ptlrpc_request **request)
+{
+ struct ptlrpc_request *req;
+ int xattr_namelen = 0;
+ char *tmp;
+ int rc;
+
+ *request = NULL;
+ req = ptlrpc_request_alloc(class_exp2cliimp(exp), fmt);
+ if (req == NULL)
+ return -ENOMEM;
+
+ mdc_set_capa_size(req, &RMF_CAPA1, oc);
+ if (xattr_name) {
+ xattr_namelen = strlen(xattr_name) + 1;
+ req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
+ xattr_namelen);
+ }
+ if (input_size) {
+ LASSERT(input);
+ req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_CLIENT,
+ input_size);
+ }
+
+ /* Flush local XATTR locks to get rid of a possible cancel RPC */
+ if (opcode == MDS_REINT && fid_is_sane(fid) &&
+ exp->exp_connect_data.ocd_ibits_known & MDS_INODELOCK_XATTR) {
+ LIST_HEAD(cancels);
+ int count;
+
+ /* Without that packing would fail */
+ if (input_size == 0)
+ req_capsule_set_size(&req->rq_pill, &RMF_EADATA,
+ RCL_CLIENT, 0);
+
+ count = mdc_resource_get_unused(exp, fid,
+ &cancels, LCK_EX,
+ MDS_INODELOCK_XATTR);
+
+ rc = mdc_prep_elc_req(exp, req, MDS_REINT, &cancels, count);
+ if (rc) {
+ ptlrpc_request_free(req);
+ return rc;
+ }
+ } else {
+ rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, opcode);
+ if (rc) {
+ ptlrpc_request_free(req);
+ return rc;
+ }
+ }
+
+ if (opcode == MDS_REINT) {
+ struct mdt_rec_setxattr *rec;
+
+ CLASSERT(sizeof(struct mdt_rec_setxattr) ==
+ sizeof(struct mdt_rec_reint));
+ rec = req_capsule_client_get(&req->rq_pill, &RMF_REC_REINT);
+ rec->sx_opcode = REINT_SETXATTR;
+ rec->sx_fsuid = from_kuid(&init_user_ns, current_fsuid());
+ rec->sx_fsgid = from_kgid(&init_user_ns, current_fsgid());
+ rec->sx_cap = cfs_curproc_cap_pack();
+ rec->sx_suppgid1 = suppgid;
+ rec->sx_suppgid2 = -1;
+ rec->sx_fid = *fid;
+ rec->sx_valid = valid | OBD_MD_FLCTIME;
+ rec->sx_time = get_seconds();
+ rec->sx_size = output_size;
+ rec->sx_flags = flags;
+
+ mdc_pack_capa(req, &RMF_CAPA1, oc);
+ } else {
+ mdc_pack_body(req, fid, oc, valid, output_size, suppgid, flags);
+ }
+
+ if (xattr_name) {
+ tmp = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
+ memcpy(tmp, xattr_name, xattr_namelen);
+ }
+ if (input_size) {
+ tmp = req_capsule_client_get(&req->rq_pill, &RMF_EADATA);
+ memcpy(tmp, input, input_size);
+ }
+
+ if (req_capsule_has_field(&req->rq_pill, &RMF_EADATA, RCL_SERVER))
+ req_capsule_set_size(&req->rq_pill, &RMF_EADATA,
+ RCL_SERVER, output_size);
+ ptlrpc_request_set_replen(req);
+
+ /* make rpc */
+ if (opcode == MDS_REINT)
+ mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
+
+ rc = ptlrpc_queue_wait(req);
+
+ if (opcode == MDS_REINT)
+ mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
+
+ if (rc)
+ ptlrpc_req_finished(req);
+ else
+ *request = req;
+ return rc;
+}
+
+static int mdc_setxattr(struct obd_export *exp, const struct lu_fid *fid,
+ struct obd_capa *oc, u64 valid, const char *xattr_name,
+ const char *input, int input_size, int output_size,
+ int flags, __u32 suppgid, struct ptlrpc_request **request)
+{
+ return mdc_xattr_common(exp, &RQF_MDS_REINT_SETXATTR,
+ fid, oc, MDS_REINT, valid, xattr_name,
+ input, input_size, output_size, flags,
+ suppgid, request);
+}
+
+static int mdc_getxattr(struct obd_export *exp, const struct lu_fid *fid,
+ struct obd_capa *oc, u64 valid, const char *xattr_name,
+ const char *input, int input_size, int output_size,
+ int flags, struct ptlrpc_request **request)
+{
+ return mdc_xattr_common(exp, &RQF_MDS_GETXATTR,
+ fid, oc, MDS_GETXATTR, valid, xattr_name,
+ input, input_size, output_size, flags,
+ -1, request);
+}
+
+#ifdef CONFIG_FS_POSIX_ACL
+static int mdc_unpack_acl(struct ptlrpc_request *req, struct lustre_md *md)
+{
+ struct req_capsule *pill = &req->rq_pill;
+ struct mdt_body *body = md->body;
+ struct posix_acl *acl;
+ void *buf;
+ int rc;
+
+ if (!body->aclsize)
+ return 0;
+
+ buf = req_capsule_server_sized_get(pill, &RMF_ACL, body->aclsize);
+
+ if (!buf)
+ return -EPROTO;
+
+ acl = posix_acl_from_xattr(&init_user_ns, buf, body->aclsize);
+ if (acl == NULL)
+ return 0;
+
+ if (IS_ERR(acl)) {
+ rc = PTR_ERR(acl);
+ CERROR("convert xattr to acl: %d\n", rc);
+ return rc;
+ }
+
+ rc = posix_acl_valid(acl);
+ if (rc) {
+ CERROR("validate acl: %d\n", rc);
+ posix_acl_release(acl);
+ return rc;
+ }
+
+ md->posix_acl = acl;
+ return 0;
+}
+#else
+#define mdc_unpack_acl(req, md) 0
+#endif
+
+int mdc_get_lustre_md(struct obd_export *exp, struct ptlrpc_request *req,
+ struct obd_export *dt_exp, struct obd_export *md_exp,
+ struct lustre_md *md)
+{
+ struct req_capsule *pill = &req->rq_pill;
+ int rc;
+
+ LASSERT(md);
+ memset(md, 0, sizeof(*md));
+
+ md->body = req_capsule_server_get(pill, &RMF_MDT_BODY);
+ LASSERT(md->body != NULL);
+
+ if (md->body->valid & OBD_MD_FLEASIZE) {
+ int lmmsize;
+ struct lov_mds_md *lmm;
+
+ if (!S_ISREG(md->body->mode)) {
+ CDEBUG(D_INFO,
+ "OBD_MD_FLEASIZE set, should be a regular file, but is not\n");
+ rc = -EPROTO;
+ goto out;
+ }
+
+ if (md->body->eadatasize == 0) {
+ CDEBUG(D_INFO,
+ "OBD_MD_FLEASIZE set, but eadatasize 0\n");
+ rc = -EPROTO;
+ goto out;
+ }
+ lmmsize = md->body->eadatasize;
+ lmm = req_capsule_server_sized_get(pill, &RMF_MDT_MD, lmmsize);
+ if (!lmm) {
+ rc = -EPROTO;
+ goto out;
+ }
+
+ rc = obd_unpackmd(dt_exp, &md->lsm, lmm, lmmsize);
+ if (rc < 0)
+ goto out;
+
+ if (rc < sizeof(*md->lsm)) {
+ CDEBUG(D_INFO,
+ "lsm size too small: rc < sizeof (*md->lsm) (%d < %d)\n",
+ rc, (int)sizeof(*md->lsm));
+ rc = -EPROTO;
+ goto out;
+ }
+
+ } else if (md->body->valid & OBD_MD_FLDIREA) {
+ int lmvsize;
+ struct lov_mds_md *lmv;
+
+ if (!S_ISDIR(md->body->mode)) {
+ CDEBUG(D_INFO,
+ "OBD_MD_FLDIREA set, should be a directory, but is not\n");
+ rc = -EPROTO;
+ goto out;
+ }
+
+ if (md->body->eadatasize == 0) {
+ CDEBUG(D_INFO,
+ "OBD_MD_FLDIREA is set, but eadatasize 0\n");
+ return -EPROTO;
+ }
+ if (md->body->valid & OBD_MD_MEA) {
+ lmvsize = md->body->eadatasize;
+ lmv = req_capsule_server_sized_get(pill, &RMF_MDT_MD,
+ lmvsize);
+ if (!lmv) {
+ rc = -EPROTO;
+ goto out;
+ }
+
+ rc = obd_unpackmd(md_exp, (void *)&md->mea, lmv,
+ lmvsize);
+ if (rc < 0)
+ goto out;
+
+ if (rc < sizeof(*md->mea)) {
+ CDEBUG(D_INFO,
+ "size too small: rc < sizeof(*md->mea) (%d < %d)\n",
+ rc, (int)sizeof(*md->mea));
+ rc = -EPROTO;
+ goto out;
+ }
+ }
+ }
+ rc = 0;
+
+ if (md->body->valid & OBD_MD_FLRMTPERM) {
+ /* remote permission */
+ LASSERT(client_is_remote(exp));
+ md->remote_perm = req_capsule_server_swab_get(pill, &RMF_ACL,
+ lustre_swab_mdt_remote_perm);
+ if (!md->remote_perm) {
+ rc = -EPROTO;
+ goto out;
+ }
+ } else if (md->body->valid & OBD_MD_FLACL) {
+ /* for ACL, it's possible that FLACL is set but aclsize is zero.
+ * only when aclsize != 0 there's an actual segment for ACL
+ * in reply buffer.
+ */
+ if (md->body->aclsize) {
+ rc = mdc_unpack_acl(req, md);
+ if (rc)
+ goto out;
+#ifdef CONFIG_FS_POSIX_ACL
+ } else {
+ md->posix_acl = NULL;
+#endif
+ }
+ }
+ if (md->body->valid & OBD_MD_FLMDSCAPA) {
+ struct obd_capa *oc = NULL;
+
+ rc = mdc_unpack_capa(NULL, req, &RMF_CAPA1, &oc);
+ if (rc)
+ goto out;
+ md->mds_capa = oc;
+ }
+
+ if (md->body->valid & OBD_MD_FLOSSCAPA) {
+ struct obd_capa *oc = NULL;
+
+ rc = mdc_unpack_capa(NULL, req, &RMF_CAPA2, &oc);
+ if (rc)
+ goto out;
+ md->oss_capa = oc;
+ }
+
+out:
+ if (rc) {
+ if (md->oss_capa) {
+ capa_put(md->oss_capa);
+ md->oss_capa = NULL;
+ }
+ if (md->mds_capa) {
+ capa_put(md->mds_capa);
+ md->mds_capa = NULL;
+ }
+#ifdef CONFIG_FS_POSIX_ACL
+ posix_acl_release(md->posix_acl);
+#endif
+ if (md->lsm)
+ obd_free_memmd(dt_exp, &md->lsm);
+ }
+ return rc;
+}
+
+int mdc_free_lustre_md(struct obd_export *exp, struct lustre_md *md)
+{
+ return 0;
+}
+
+/**
+ * Handles both OPEN and SETATTR RPCs for OPEN-CLOSE and SETATTR-DONE_WRITING
+ * RPC chains.
+ */
+void mdc_replay_open(struct ptlrpc_request *req)
+{
+ struct md_open_data *mod = req->rq_cb_data;
+ struct ptlrpc_request *close_req;
+ struct obd_client_handle *och;
+ struct lustre_handle old;
+ struct mdt_body *body;
+
+ if (mod == NULL) {
+ DEBUG_REQ(D_ERROR, req,
+ "Can't properly replay without open data.");
+ return;
+ }
+
+ body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
+ LASSERT(body != NULL);
+
+ och = mod->mod_och;
+ if (och != NULL) {
+ struct lustre_handle *file_fh;
+
+ LASSERT(och->och_magic == OBD_CLIENT_HANDLE_MAGIC);
+
+ file_fh = &och->och_fh;
+ CDEBUG(D_HA, "updating handle from %#llx to %#llx\n",
+ file_fh->cookie, body->handle.cookie);
+ old = *file_fh;
+ *file_fh = body->handle;
+ }
+ close_req = mod->mod_close_req;
+ if (close_req != NULL) {
+ __u32 opc = lustre_msg_get_opc(close_req->rq_reqmsg);
+ struct mdt_ioepoch *epoch;
+
+ LASSERT(opc == MDS_CLOSE || opc == MDS_DONE_WRITING);
+ epoch = req_capsule_client_get(&close_req->rq_pill,
+ &RMF_MDT_EPOCH);
+ LASSERT(epoch);
+
+ if (och != NULL)
+ LASSERT(!memcmp(&old, &epoch->handle, sizeof(old)));
+ DEBUG_REQ(D_HA, close_req, "updating close body with new fh");
+ epoch->handle = body->handle;
+ }
+}
+
+void mdc_commit_open(struct ptlrpc_request *req)
+{
+ struct md_open_data *mod = req->rq_cb_data;
+
+ if (mod == NULL)
+ return;
+
+ /**
+ * No need to touch md_open_data::mod_och, it holds a reference on
+ * \var mod and will zero references to each other, \var mod will be
+ * freed after that when md_open_data::mod_och will put the reference.
+ */
+
+ /**
+ * Do not let open request to disappear as it still may be needed
+ * for close rpc to happen (it may happen on evict only, otherwise
+ * ptlrpc_request::rq_replay does not let mdc_commit_open() to be
+ * called), just mark this rpc as committed to distinguish these 2
+ * cases, see mdc_close() for details. The open request reference will
+ * be put along with freeing \var mod.
+ */
+ ptlrpc_request_addref(req);
+ spin_lock(&req->rq_lock);
+ req->rq_committed = 1;
+ spin_unlock(&req->rq_lock);
+ req->rq_cb_data = NULL;
+ obd_mod_put(mod);
+}
+
+int mdc_set_open_replay_data(struct obd_export *exp,
+ struct obd_client_handle *och,
+ struct lookup_intent *it)
+{
+ struct md_open_data *mod;
+ struct mdt_rec_create *rec;
+ struct mdt_body *body;
+ struct ptlrpc_request *open_req = it->d.lustre.it_data;
+ struct obd_import *imp = open_req->rq_import;
+
+ if (!open_req->rq_replay)
+ return 0;
+
+ rec = req_capsule_client_get(&open_req->rq_pill, &RMF_REC_REINT);
+ body = req_capsule_server_get(&open_req->rq_pill, &RMF_MDT_BODY);
+ LASSERT(rec != NULL);
+ /* Incoming message in my byte order (it's been swabbed). */
+ /* Outgoing messages always in my byte order. */
+ LASSERT(body != NULL);
+
+ /* Only if the import is replayable, we set replay_open data */
+ if (och && imp->imp_replayable) {
+ mod = obd_mod_alloc();
+ if (mod == NULL) {
+ DEBUG_REQ(D_ERROR, open_req,
+ "Can't allocate md_open_data");
+ return 0;
+ }
+
+ /**
+ * Take a reference on \var mod, to be freed on mdc_close().
+ * It protects \var mod from being freed on eviction (commit
+ * callback is called despite rq_replay flag).
+ * Another reference for \var och.
+ */
+ obd_mod_get(mod);
+ obd_mod_get(mod);
+
+ spin_lock(&open_req->rq_lock);
+ och->och_mod = mod;
+ mod->mod_och = och;
+ mod->mod_is_create = it_disposition(it, DISP_OPEN_CREATE) ||
+ it_disposition(it, DISP_OPEN_STRIPE);
+ mod->mod_open_req = open_req;
+ open_req->rq_cb_data = mod;
+ open_req->rq_commit_cb = mdc_commit_open;
+ spin_unlock(&open_req->rq_lock);
+ }
+
+ rec->cr_fid2 = body->fid1;
+ rec->cr_ioepoch = body->ioepoch;
+ rec->cr_old_handle.cookie = body->handle.cookie;
+ open_req->rq_replay_cb = mdc_replay_open;
+ if (!fid_is_sane(&body->fid1)) {
+ DEBUG_REQ(D_ERROR, open_req,
+ "Saving replay request with insane fid");
+ LBUG();
+ }
+
+ DEBUG_REQ(D_RPCTRACE, open_req, "Set up open replay data");
+ return 0;
+}
+
+static void mdc_free_open(struct md_open_data *mod)
+{
+ int committed = 0;
+
+ if (mod->mod_is_create == 0 &&
+ imp_connect_disp_stripe(mod->mod_open_req->rq_import))
+ committed = 1;
+
+ LASSERT(mod->mod_open_req->rq_replay == 0);
+
+ DEBUG_REQ(D_RPCTRACE, mod->mod_open_req, "free open request\n");
+
+ ptlrpc_request_committed(mod->mod_open_req, committed);
+ if (mod->mod_close_req)
+ ptlrpc_request_committed(mod->mod_close_req, committed);
+}
+
+int mdc_clear_open_replay_data(struct obd_export *exp,
+ struct obd_client_handle *och)
+{
+ struct md_open_data *mod = och->och_mod;
+
+ /**
+ * It is possible to not have \var mod in a case of eviction between
+ * lookup and ll_file_open().
+ **/
+ if (mod == NULL)
+ return 0;
+
+ LASSERT(mod != LP_POISON);
+ LASSERT(mod->mod_open_req != NULL);
+ mdc_free_open(mod);
+
+ mod->mod_och = NULL;
+ och->och_mod = NULL;
+ obd_mod_put(mod);
+
+ return 0;
+}
+
+/* Prepares the request for the replay by the given reply */
+static void mdc_close_handle_reply(struct ptlrpc_request *req,
+ struct md_op_data *op_data, int rc) {
+ struct mdt_body *repbody;
+ struct mdt_ioepoch *epoch;
+
+ if (req && rc == -EAGAIN) {
+ repbody = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
+ epoch = req_capsule_client_get(&req->rq_pill, &RMF_MDT_EPOCH);
+
+ epoch->flags |= MF_SOM_AU;
+ if (repbody->valid & OBD_MD_FLGETATTRLOCK)
+ op_data->op_flags |= MF_GETATTR_LOCK;
+ }
+}
+
+static int mdc_close(struct obd_export *exp, struct md_op_data *op_data,
+ struct md_open_data *mod, struct ptlrpc_request **request)
+{
+ struct obd_device *obd = class_exp2obd(exp);
+ struct ptlrpc_request *req;
+ struct req_format *req_fmt;
+ int rc;
+ int saved_rc = 0;
+
+
+ req_fmt = &RQF_MDS_CLOSE;
+ if (op_data->op_bias & MDS_HSM_RELEASE) {
+ req_fmt = &RQF_MDS_RELEASE_CLOSE;
+
+ /* allocate a FID for volatile file */
+ rc = mdc_fid_alloc(exp, &op_data->op_fid2, op_data);
+ if (rc < 0) {
+ CERROR("%s: "DFID" failed to allocate FID: %d\n",
+ obd->obd_name, PFID(&op_data->op_fid1), rc);
+ /* save the errcode and proceed to close */
+ saved_rc = rc;
+ }
+ }
+
+ *request = NULL;
+ req = ptlrpc_request_alloc(class_exp2cliimp(exp), req_fmt);
+ if (req == NULL)
+ return -ENOMEM;
+
+ mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
+
+ rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_CLOSE);
+ if (rc) {
+ ptlrpc_request_free(req);
+ return rc;
+ }
+
+ /* To avoid a livelock (bug 7034), we need to send CLOSE RPCs to a
+ * portal whose threads are not taking any DLM locks and are therefore
+ * always progressing */
+ req->rq_request_portal = MDS_READPAGE_PORTAL;
+ ptlrpc_at_set_req_timeout(req);
+
+ /* Ensure that this close's handle is fixed up during replay. */
+ if (likely(mod != NULL)) {
+ LASSERTF(mod->mod_open_req != NULL &&
+ mod->mod_open_req->rq_type != LI_POISON,
+ "POISONED open %p!\n", mod->mod_open_req);
+
+ mod->mod_close_req = req;
+
+ DEBUG_REQ(D_HA, mod->mod_open_req, "matched open");
+ /* We no longer want to preserve this open for replay even
+ * though the open was committed. b=3632, b=3633 */
+ spin_lock(&mod->mod_open_req->rq_lock);
+ mod->mod_open_req->rq_replay = 0;
+ spin_unlock(&mod->mod_open_req->rq_lock);
+ } else {
+ CDEBUG(D_HA,
+ "couldn't find open req; expecting close error\n");
+ }
+
+ mdc_close_pack(req, op_data);
+
+ req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
+ obd->u.cli.cl_default_mds_easize);
+ req_capsule_set_size(&req->rq_pill, &RMF_LOGCOOKIES, RCL_SERVER,
+ obd->u.cli.cl_default_mds_cookiesize);
+
+ ptlrpc_request_set_replen(req);
+
+ mdc_get_rpc_lock(obd->u.cli.cl_close_lock, NULL);
+ rc = ptlrpc_queue_wait(req);
+ mdc_put_rpc_lock(obd->u.cli.cl_close_lock, NULL);
+
+ if (req->rq_repmsg == NULL) {
+ CDEBUG(D_RPCTRACE, "request failed to send: %p, %d\n", req,
+ req->rq_status);
+ if (rc == 0)
+ rc = req->rq_status ?: -EIO;
+ } else if (rc == 0 || rc == -EAGAIN) {
+ struct mdt_body *body;
+
+ rc = lustre_msg_get_status(req->rq_repmsg);
+ if (lustre_msg_get_type(req->rq_repmsg) == PTL_RPC_MSG_ERR) {
+ DEBUG_REQ(D_ERROR, req,
+ "type == PTL_RPC_MSG_ERR, err = %d", rc);
+ if (rc > 0)
+ rc = -rc;
+ }
+ body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
+ if (body == NULL)
+ rc = -EPROTO;
+ } else if (rc == -ESTALE) {
+ /**
+ * it can be allowed error after 3633 if open was committed and
+ * server failed before close was sent. Let's check if mod
+ * exists and return no error in that case
+ */
+ if (mod) {
+ DEBUG_REQ(D_HA, req, "Reset ESTALE = %d", rc);
+ LASSERT(mod->mod_open_req != NULL);
+ if (mod->mod_open_req->rq_committed)
+ rc = 0;
+ }
+ }
+
+ if (mod) {
+ if (rc != 0)
+ mod->mod_close_req = NULL;
+ /* Since now, mod is accessed through open_req only,
+ * thus close req does not keep a reference on mod anymore. */
+ obd_mod_put(mod);
+ }
+ *request = req;
+ mdc_close_handle_reply(req, op_data, rc);
+ return rc < 0 ? rc : saved_rc;
+}
+
+static int mdc_done_writing(struct obd_export *exp, struct md_op_data *op_data,
+ struct md_open_data *mod)
+{
+ struct obd_device *obd = class_exp2obd(exp);
+ struct ptlrpc_request *req;
+ int rc;
+
+ req = ptlrpc_request_alloc(class_exp2cliimp(exp),
+ &RQF_MDS_DONE_WRITING);
+ if (req == NULL)
+ return -ENOMEM;
+
+ mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
+ rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_DONE_WRITING);
+ if (rc) {
+ ptlrpc_request_free(req);
+ return rc;
+ }
+
+ if (mod != NULL) {
+ LASSERTF(mod->mod_open_req != NULL &&
+ mod->mod_open_req->rq_type != LI_POISON,
+ "POISONED setattr %p!\n", mod->mod_open_req);
+
+ mod->mod_close_req = req;
+ DEBUG_REQ(D_HA, mod->mod_open_req, "matched setattr");
+ /* We no longer want to preserve this setattr for replay even
+ * though the open was committed. b=3632, b=3633 */
+ spin_lock(&mod->mod_open_req->rq_lock);
+ mod->mod_open_req->rq_replay = 0;
+ spin_unlock(&mod->mod_open_req->rq_lock);
+ }
+
+ mdc_close_pack(req, op_data);
+ ptlrpc_request_set_replen(req);
+
+ mdc_get_rpc_lock(obd->u.cli.cl_close_lock, NULL);
+ rc = ptlrpc_queue_wait(req);
+ mdc_put_rpc_lock(obd->u.cli.cl_close_lock, NULL);
+
+ if (rc == -ESTALE) {
+ /**
+ * it can be allowed error after 3633 if open or setattr were
+ * committed and server failed before close was sent.
+ * Let's check if mod exists and return no error in that case
+ */
+ if (mod) {
+ LASSERT(mod->mod_open_req != NULL);
+ if (mod->mod_open_req->rq_committed)
+ rc = 0;
+ }
+ }
+
+ if (mod) {
+ if (rc != 0)
+ mod->mod_close_req = NULL;
+ LASSERT(mod->mod_open_req != NULL);
+ mdc_free_open(mod);
+
+ /* Since now, mod is accessed through setattr req only,
+ * thus DW req does not keep a reference on mod anymore. */
+ obd_mod_put(mod);
+ }
+
+ mdc_close_handle_reply(req, op_data, rc);
+ ptlrpc_req_finished(req);
+ return rc;
+}
+
+
+static int mdc_readpage(struct obd_export *exp, struct md_op_data *op_data,
+ struct page **pages, struct ptlrpc_request **request)
+{
+ struct ptlrpc_request *req;
+ struct ptlrpc_bulk_desc *desc;
+ int i;
+ wait_queue_head_t waitq;
+ int resends = 0;
+ struct l_wait_info lwi;
+ int rc;
+
+ *request = NULL;
+ init_waitqueue_head(&waitq);
+
+restart_bulk:
+ req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_READPAGE);
+ if (req == NULL)
+ return -ENOMEM;
+
+ mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
+
+ rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_READPAGE);
+ if (rc) {
+ ptlrpc_request_free(req);
+ return rc;
+ }
+
+ req->rq_request_portal = MDS_READPAGE_PORTAL;
+ ptlrpc_at_set_req_timeout(req);
+
+ desc = ptlrpc_prep_bulk_imp(req, op_data->op_npages, 1, BULK_PUT_SINK,
+ MDS_BULK_PORTAL);
+ if (desc == NULL) {
+ ptlrpc_request_free(req);
+ return -ENOMEM;
+ }
+
+ /* NB req now owns desc and will free it when it gets freed */
+ for (i = 0; i < op_data->op_npages; i++)
+ ptlrpc_prep_bulk_page_pin(desc, pages[i], 0, PAGE_CACHE_SIZE);
+
+ mdc_readdir_pack(req, op_data->op_offset,
+ PAGE_CACHE_SIZE * op_data->op_npages,
+ &op_data->op_fid1, op_data->op_capa1);
+
+ ptlrpc_request_set_replen(req);
+ rc = ptlrpc_queue_wait(req);
+ if (rc) {
+ ptlrpc_req_finished(req);
+ if (rc != -ETIMEDOUT)
+ return rc;
+
+ resends++;
+ if (!client_should_resend(resends, &exp->exp_obd->u.cli)) {
+ CERROR("too many resend retries, returning error\n");
+ return -EIO;
+ }
+ lwi = LWI_TIMEOUT_INTR(cfs_time_seconds(resends),
+ NULL, NULL, NULL);
+ l_wait_event(waitq, 0, &lwi);
+
+ goto restart_bulk;
+ }
+
+ rc = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk,
+ req->rq_bulk->bd_nob_transferred);
+ if (rc < 0) {
+ ptlrpc_req_finished(req);
+ return rc;
+ }
+
+ if (req->rq_bulk->bd_nob_transferred & ~LU_PAGE_MASK) {
+ CERROR("Unexpected # bytes transferred: %d (%ld expected)\n",
+ req->rq_bulk->bd_nob_transferred,
+ PAGE_CACHE_SIZE * op_data->op_npages);
+ ptlrpc_req_finished(req);
+ return -EPROTO;
+ }
+
+ *request = req;
+ return 0;
+}
+
+static int mdc_statfs(const struct lu_env *env,
+ struct obd_export *exp, struct obd_statfs *osfs,
+ __u64 max_age, __u32 flags)
+{
+ struct obd_device *obd = class_exp2obd(exp);
+ struct ptlrpc_request *req;
+ struct obd_statfs *msfs;
+ struct obd_import *imp = NULL;
+ int rc;
+
+ /*
+ * Since the request might also come from lprocfs, so we need
+ * sync this with client_disconnect_export Bug15684
+ */
+ down_read(&obd->u.cli.cl_sem);
+ if (obd->u.cli.cl_import)
+ imp = class_import_get(obd->u.cli.cl_import);
+ up_read(&obd->u.cli.cl_sem);
+ if (!imp)
+ return -ENODEV;
+
+ req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_STATFS,
+ LUSTRE_MDS_VERSION, MDS_STATFS);
+ if (req == NULL) {
+ rc = -ENOMEM;
+ goto output;
+ }
+
+ ptlrpc_request_set_replen(req);
+
+ if (flags & OBD_STATFS_NODELAY) {
+ /* procfs requests not want stay in wait for avoid deadlock */
+ req->rq_no_resend = 1;
+ req->rq_no_delay = 1;
+ }
+
+ rc = ptlrpc_queue_wait(req);
+ if (rc) {
+ /* check connection error first */
+ if (imp->imp_connect_error)
+ rc = imp->imp_connect_error;
+ goto out;
+ }
+
+ msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
+ if (msfs == NULL) {
+ rc = -EPROTO;
+ goto out;
+ }
+
+ *osfs = *msfs;
+out:
+ ptlrpc_req_finished(req);
+output:
+ class_import_put(imp);
+ return rc;
+}
+
+static int mdc_ioc_fid2path(struct obd_export *exp, struct getinfo_fid2path *gf)
+{
+ __u32 keylen, vallen;
+ void *key;
+ int rc;
+
+ if (gf->gf_pathlen > PATH_MAX)
+ return -ENAMETOOLONG;
+ if (gf->gf_pathlen < 2)
+ return -EOVERFLOW;
+
+ /* Key is KEY_FID2PATH + getinfo_fid2path description */
+ keylen = cfs_size_round(sizeof(KEY_FID2PATH)) + sizeof(*gf);
+ OBD_ALLOC(key, keylen);
+ if (key == NULL)
+ return -ENOMEM;
+ memcpy(key, KEY_FID2PATH, sizeof(KEY_FID2PATH));
+ memcpy(key + cfs_size_round(sizeof(KEY_FID2PATH)), gf, sizeof(*gf));
+
+ CDEBUG(D_IOCTL, "path get "DFID" from %llu #%d\n",
+ PFID(&gf->gf_fid), gf->gf_recno, gf->gf_linkno);
+
+ if (!fid_is_sane(&gf->gf_fid)) {
+ rc = -EINVAL;
+ goto out;
+ }
+
+ /* Val is struct getinfo_fid2path result plus path */
+ vallen = sizeof(*gf) + gf->gf_pathlen;
+
+ rc = obd_get_info(NULL, exp, keylen, key, &vallen, gf, NULL);
+ if (rc != 0 && rc != -EREMOTE)
+ goto out;
+
+ if (vallen <= sizeof(*gf)) {
+ rc = -EPROTO;
+ goto out;
+ } else if (vallen > sizeof(*gf) + gf->gf_pathlen) {
+ rc = -EOVERFLOW;
+ goto out;
+ }
+
+ CDEBUG(D_IOCTL, "path get "DFID" from %llu #%d\n%s\n",
+ PFID(&gf->gf_fid), gf->gf_recno, gf->gf_linkno, gf->gf_path);
+
+out:
+ OBD_FREE(key, keylen);
+ return rc;
+}
+
+static int mdc_ioc_hsm_progress(struct obd_export *exp,
+ struct hsm_progress_kernel *hpk)
+{
+ struct obd_import *imp = class_exp2cliimp(exp);
+ struct hsm_progress_kernel *req_hpk;
+ struct ptlrpc_request *req;
+ int rc;
+
+ req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_HSM_PROGRESS,
+ LUSTRE_MDS_VERSION, MDS_HSM_PROGRESS);
+ if (req == NULL) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ mdc_pack_body(req, NULL, NULL, OBD_MD_FLRMTPERM, 0, 0, 0);
+
+ /* Copy hsm_progress struct */
+ req_hpk = req_capsule_client_get(&req->rq_pill, &RMF_MDS_HSM_PROGRESS);
+ if (req_hpk == NULL) {
+ rc = -EPROTO;
+ goto out;
+ }
+
+ *req_hpk = *hpk;
+ req_hpk->hpk_errval = lustre_errno_hton(hpk->hpk_errval);
+
+ ptlrpc_request_set_replen(req);
+
+ rc = mdc_queue_wait(req);
+ goto out;
+out:
+ ptlrpc_req_finished(req);
+ return rc;
+}
+
+static int mdc_ioc_hsm_ct_register(struct obd_import *imp, __u32 archives)
+{
+ __u32 *archive_mask;
+ struct ptlrpc_request *req;
+ int rc;
+
+ req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_HSM_CT_REGISTER,
+ LUSTRE_MDS_VERSION,
+ MDS_HSM_CT_REGISTER);
+ if (req == NULL) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ mdc_pack_body(req, NULL, NULL, OBD_MD_FLRMTPERM, 0, 0, 0);
+
+ /* Copy hsm_progress struct */
+ archive_mask = req_capsule_client_get(&req->rq_pill,
+ &RMF_MDS_HSM_ARCHIVE);
+ if (archive_mask == NULL) {
+ rc = -EPROTO;
+ goto out;
+ }
+
+ *archive_mask = archives;
+
+ ptlrpc_request_set_replen(req);
+
+ rc = mdc_queue_wait(req);
+ goto out;
+out:
+ ptlrpc_req_finished(req);
+ return rc;
+}
+
+static int mdc_ioc_hsm_current_action(struct obd_export *exp,
+ struct md_op_data *op_data)
+{
+ struct hsm_current_action *hca = op_data->op_data;
+ struct hsm_current_action *req_hca;
+ struct ptlrpc_request *req;
+ int rc;
+
+ req = ptlrpc_request_alloc(class_exp2cliimp(exp),
+ &RQF_MDS_HSM_ACTION);
+ if (req == NULL)
+ return -ENOMEM;
+
+ mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
+
+ rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_HSM_ACTION);
+ if (rc) {
+ ptlrpc_request_free(req);
+ return rc;
+ }
+
+ mdc_pack_body(req, &op_data->op_fid1, op_data->op_capa1,
+ OBD_MD_FLRMTPERM, 0, op_data->op_suppgids[0], 0);
+
+ ptlrpc_request_set_replen(req);
+
+ rc = mdc_queue_wait(req);
+ if (rc)
+ goto out;
+
+ req_hca = req_capsule_server_get(&req->rq_pill,
+ &RMF_MDS_HSM_CURRENT_ACTION);
+ if (req_hca == NULL) {
+ rc = -EPROTO;
+ goto out;
+ }
+
+ *hca = *req_hca;
+
+out:
+ ptlrpc_req_finished(req);
+ return rc;
+}
+
+static int mdc_ioc_hsm_ct_unregister(struct obd_import *imp)
+{
+ struct ptlrpc_request *req;
+ int rc;
+
+ req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_HSM_CT_UNREGISTER,
+ LUSTRE_MDS_VERSION,
+ MDS_HSM_CT_UNREGISTER);
+ if (req == NULL) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ mdc_pack_body(req, NULL, NULL, OBD_MD_FLRMTPERM, 0, 0, 0);
+
+ ptlrpc_request_set_replen(req);
+
+ rc = mdc_queue_wait(req);
+ goto out;
+out:
+ ptlrpc_req_finished(req);
+ return rc;
+}
+
+static int mdc_ioc_hsm_state_get(struct obd_export *exp,
+ struct md_op_data *op_data)
+{
+ struct hsm_user_state *hus = op_data->op_data;
+ struct hsm_user_state *req_hus;
+ struct ptlrpc_request *req;
+ int rc;
+
+ req = ptlrpc_request_alloc(class_exp2cliimp(exp),
+ &RQF_MDS_HSM_STATE_GET);
+ if (req == NULL)
+ return -ENOMEM;
+
+ mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
+
+ rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_HSM_STATE_GET);
+ if (rc != 0) {
+ ptlrpc_request_free(req);
+ return rc;
+ }
+
+ mdc_pack_body(req, &op_data->op_fid1, op_data->op_capa1,
+ OBD_MD_FLRMTPERM, 0, op_data->op_suppgids[0], 0);
+
+ ptlrpc_request_set_replen(req);
+
+ rc = mdc_queue_wait(req);
+ if (rc)
+ goto out;
+
+ req_hus = req_capsule_server_get(&req->rq_pill, &RMF_HSM_USER_STATE);
+ if (req_hus == NULL) {
+ rc = -EPROTO;
+ goto out;
+ }
+
+ *hus = *req_hus;
+
+out:
+ ptlrpc_req_finished(req);
+ return rc;
+}
+
+static int mdc_ioc_hsm_state_set(struct obd_export *exp,
+ struct md_op_data *op_data)
+{
+ struct hsm_state_set *hss = op_data->op_data;
+ struct hsm_state_set *req_hss;
+ struct ptlrpc_request *req;
+ int rc;
+
+ req = ptlrpc_request_alloc(class_exp2cliimp(exp),
+ &RQF_MDS_HSM_STATE_SET);
+ if (req == NULL)
+ return -ENOMEM;
+
+ mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
+
+ rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_HSM_STATE_SET);
+ if (rc) {
+ ptlrpc_request_free(req);
+ return rc;
+ }
+
+ mdc_pack_body(req, &op_data->op_fid1, op_data->op_capa1,
+ OBD_MD_FLRMTPERM, 0, op_data->op_suppgids[0], 0);
+
+ /* Copy states */
+ req_hss = req_capsule_client_get(&req->rq_pill, &RMF_HSM_STATE_SET);
+ if (req_hss == NULL) {
+ rc = -EPROTO;
+ goto out;
+ }
+ *req_hss = *hss;
+
+ ptlrpc_request_set_replen(req);
+
+ rc = mdc_queue_wait(req);
+ goto out;
+
+out:
+ ptlrpc_req_finished(req);
+ return rc;
+}
+
+static int mdc_ioc_hsm_request(struct obd_export *exp,
+ struct hsm_user_request *hur)
+{
+ struct obd_import *imp = class_exp2cliimp(exp);
+ struct ptlrpc_request *req;
+ struct hsm_request *req_hr;
+ struct hsm_user_item *req_hui;
+ char *req_opaque;
+ int rc;
+
+ req = ptlrpc_request_alloc(imp, &RQF_MDS_HSM_REQUEST);
+ if (req == NULL) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ req_capsule_set_size(&req->rq_pill, &RMF_MDS_HSM_USER_ITEM, RCL_CLIENT,
+ hur->hur_request.hr_itemcount
+ * sizeof(struct hsm_user_item));
+ req_capsule_set_size(&req->rq_pill, &RMF_GENERIC_DATA, RCL_CLIENT,
+ hur->hur_request.hr_data_len);
+
+ rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_HSM_REQUEST);
+ if (rc) {
+ ptlrpc_request_free(req);
+ return rc;
+ }
+
+ mdc_pack_body(req, NULL, NULL, OBD_MD_FLRMTPERM, 0, 0, 0);
+
+ /* Copy hsm_request struct */
+ req_hr = req_capsule_client_get(&req->rq_pill, &RMF_MDS_HSM_REQUEST);
+ if (req_hr == NULL) {
+ rc = -EPROTO;
+ goto out;
+ }
+ *req_hr = hur->hur_request;
+
+ /* Copy hsm_user_item structs */
+ req_hui = req_capsule_client_get(&req->rq_pill, &RMF_MDS_HSM_USER_ITEM);
+ if (req_hui == NULL) {
+ rc = -EPROTO;
+ goto out;
+ }
+ memcpy(req_hui, hur->hur_user_item,
+ hur->hur_request.hr_itemcount * sizeof(struct hsm_user_item));
+
+ /* Copy opaque field */
+ req_opaque = req_capsule_client_get(&req->rq_pill, &RMF_GENERIC_DATA);
+ if (req_opaque == NULL) {
+ rc = -EPROTO;
+ goto out;
+ }
+ memcpy(req_opaque, hur_data(hur), hur->hur_request.hr_data_len);
+
+ ptlrpc_request_set_replen(req);
+
+ rc = mdc_queue_wait(req);
+ goto out;
+
+out:
+ ptlrpc_req_finished(req);
+ return rc;
+}
+
+static struct kuc_hdr *changelog_kuc_hdr(char *buf, int len, int flags)
+{
+ struct kuc_hdr *lh = (struct kuc_hdr *)buf;
+
+ LASSERT(len <= KUC_CHANGELOG_MSG_MAXSIZE);
+
+ lh->kuc_magic = KUC_MAGIC;
+ lh->kuc_transport = KUC_TRANSPORT_CHANGELOG;
+ lh->kuc_flags = flags;
+ lh->kuc_msgtype = CL_RECORD;
+ lh->kuc_msglen = len;
+ return lh;
+}
+
+#define D_CHANGELOG 0
+
+struct changelog_show {
+ __u64 cs_startrec;
+ __u32 cs_flags;
+ struct file *cs_fp;
+ char *cs_buf;
+ struct obd_device *cs_obd;
+};
+
+static int changelog_kkuc_cb(const struct lu_env *env, struct llog_handle *llh,
+ struct llog_rec_hdr *hdr, void *data)
+{
+ struct changelog_show *cs = data;
+ struct llog_changelog_rec *rec = (struct llog_changelog_rec *)hdr;
+ struct kuc_hdr *lh;
+ int len, rc;
+
+ if (rec->cr_hdr.lrh_type != CHANGELOG_REC) {
+ rc = -EINVAL;
+ CERROR("%s: not a changelog rec %x/%d: rc = %d\n",
+ cs->cs_obd->obd_name, rec->cr_hdr.lrh_type,
+ rec->cr.cr_type, rc);
+ return rc;
+ }
+
+ if (rec->cr.cr_index < cs->cs_startrec) {
+ /* Skip entries earlier than what we are interested in */
+ CDEBUG(D_CHANGELOG, "rec=%llu start=%llu\n",
+ rec->cr.cr_index, cs->cs_startrec);
+ return 0;
+ }
+
+ CDEBUG(D_CHANGELOG, "%llu %02d%-5s %llu 0x%x t="DFID" p="DFID
+ " %.*s\n", rec->cr.cr_index, rec->cr.cr_type,
+ changelog_type2str(rec->cr.cr_type), rec->cr.cr_time,
+ rec->cr.cr_flags & CLF_FLAGMASK,
+ PFID(&rec->cr.cr_tfid), PFID(&rec->cr.cr_pfid),
+ rec->cr.cr_namelen, changelog_rec_name(&rec->cr));
+
+ len = sizeof(*lh) + changelog_rec_size(&rec->cr) + rec->cr.cr_namelen;
+
+ /* Set up the message */
+ lh = changelog_kuc_hdr(cs->cs_buf, len, cs->cs_flags);
+ memcpy(lh + 1, &rec->cr, len - sizeof(*lh));
+
+ rc = libcfs_kkuc_msg_put(cs->cs_fp, lh);
+ CDEBUG(D_CHANGELOG, "kucmsg fp %p len %d rc %d\n", cs->cs_fp, len, rc);
+
+ return rc;
+}
+
+static int mdc_changelog_send_thread(void *csdata)
+{
+ struct changelog_show *cs = csdata;
+ struct llog_ctxt *ctxt = NULL;
+ struct llog_handle *llh = NULL;
+ struct kuc_hdr *kuch;
+ int rc;
+
+ CDEBUG(D_CHANGELOG, "changelog to fp=%p start %llu\n",
+ cs->cs_fp, cs->cs_startrec);
+
+ OBD_ALLOC(cs->cs_buf, KUC_CHANGELOG_MSG_MAXSIZE);
+ if (cs->cs_buf == NULL) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ /* Set up the remote catalog handle */
+ ctxt = llog_get_context(cs->cs_obd, LLOG_CHANGELOG_REPL_CTXT);
+ if (ctxt == NULL) {
+ rc = -ENOENT;
+ goto out;
+ }
+ rc = llog_open(NULL, ctxt, &llh, NULL, CHANGELOG_CATALOG,
+ LLOG_OPEN_EXISTS);
+ if (rc) {
+ CERROR("%s: fail to open changelog catalog: rc = %d\n",
+ cs->cs_obd->obd_name, rc);
+ goto out;
+ }
+ rc = llog_init_handle(NULL, llh, LLOG_F_IS_CAT, NULL);
+ if (rc) {
+ CERROR("llog_init_handle failed %d\n", rc);
+ goto out;
+ }
+
+ rc = llog_cat_process(NULL, llh, changelog_kkuc_cb, cs, 0, 0);
+
+ /* Send EOF no matter what our result */
+ kuch = changelog_kuc_hdr(cs->cs_buf, sizeof(*kuch), cs->cs_flags);
+ if (kuch) {
+ kuch->kuc_msgtype = CL_EOF;
+ libcfs_kkuc_msg_put(cs->cs_fp, kuch);
+ }
+
+out:
+ fput(cs->cs_fp);
+ if (llh)
+ llog_cat_close(NULL, llh);
+ if (ctxt)
+ llog_ctxt_put(ctxt);
+ if (cs->cs_buf)
+ OBD_FREE(cs->cs_buf, KUC_CHANGELOG_MSG_MAXSIZE);
+ OBD_FREE_PTR(cs);
+ return rc;
+}
+
+static int mdc_ioc_changelog_send(struct obd_device *obd,
+ struct ioc_changelog *icc)
+{
+ struct changelog_show *cs;
+ int rc;
+
+ /* Freed in mdc_changelog_send_thread */
+ OBD_ALLOC_PTR(cs);
+ if (!cs)
+ return -ENOMEM;
+
+ cs->cs_obd = obd;
+ cs->cs_startrec = icc->icc_recno;
+ /* matching fput in mdc_changelog_send_thread */
+ cs->cs_fp = fget(icc->icc_id);
+ cs->cs_flags = icc->icc_flags;
+
+ /*
+ * New thread because we should return to user app before
+ * writing into our pipe
+ */
+ rc = PTR_ERR(kthread_run(mdc_changelog_send_thread, cs,
+ "mdc_clg_send_thread"));
+ if (!IS_ERR_VALUE(rc)) {
+ CDEBUG(D_CHANGELOG, "start changelog thread\n");
+ return 0;
+ }
+
+ CERROR("Failed to start changelog thread: %d\n", rc);
+ OBD_FREE_PTR(cs);
+ return rc;
+}
+
+static int mdc_ioc_hsm_ct_start(struct obd_export *exp,
+ struct lustre_kernelcomm *lk);
+
+static int mdc_quotacheck(struct obd_device *unused, struct obd_export *exp,
+ struct obd_quotactl *oqctl)
+{
+ struct client_obd *cli = &exp->exp_obd->u.cli;
+ struct ptlrpc_request *req;
+ struct obd_quotactl *body;
+ int rc;
+
+ req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
+ &RQF_MDS_QUOTACHECK, LUSTRE_MDS_VERSION,
+ MDS_QUOTACHECK);
+ if (req == NULL)
+ return -ENOMEM;
+
+ body = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
+ *body = *oqctl;
+
+ ptlrpc_request_set_replen(req);
+
+ /* the next poll will find -ENODATA, that means quotacheck is
+ * going on */
+ cli->cl_qchk_stat = -ENODATA;
+ rc = ptlrpc_queue_wait(req);
+ if (rc)
+ cli->cl_qchk_stat = rc;
+ ptlrpc_req_finished(req);
+ return rc;
+}
+
+static int mdc_quota_poll_check(struct obd_export *exp,
+ struct if_quotacheck *qchk)
+{
+ struct client_obd *cli = &exp->exp_obd->u.cli;
+ int rc;
+
+ qchk->obd_uuid = cli->cl_target_uuid;
+ memcpy(qchk->obd_type, LUSTRE_MDS_NAME, strlen(LUSTRE_MDS_NAME));
+
+ rc = cli->cl_qchk_stat;
+ /* the client is not the previous one */
+ if (rc == CL_NOT_QUOTACHECKED)
+ rc = -EINTR;
+ return rc;
+}
+
+static int mdc_quotactl(struct obd_device *unused, struct obd_export *exp,
+ struct obd_quotactl *oqctl)
+{
+ struct ptlrpc_request *req;
+ struct obd_quotactl *oqc;
+ int rc;
+
+ req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
+ &RQF_MDS_QUOTACTL, LUSTRE_MDS_VERSION,
+ MDS_QUOTACTL);
+ if (req == NULL)
+ return -ENOMEM;
+
+ oqc = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
+ *oqc = *oqctl;
+
+ ptlrpc_request_set_replen(req);
+ ptlrpc_at_set_req_timeout(req);
+ req->rq_no_resend = 1;
+
+ rc = ptlrpc_queue_wait(req);
+ if (rc)
+ CERROR("ptlrpc_queue_wait failed, rc: %d\n", rc);
+
+ if (req->rq_repmsg) {
+ oqc = req_capsule_server_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
+ if (oqc) {
+ *oqctl = *oqc;
+ } else if (!rc) {
+ CERROR("Can't unpack obd_quotactl\n");
+ rc = -EPROTO;
+ }
+ } else if (!rc) {
+ CERROR("Can't unpack obd_quotactl\n");
+ rc = -EPROTO;
+ }
+ ptlrpc_req_finished(req);
+
+ return rc;
+}
+
+static int mdc_ioc_swap_layouts(struct obd_export *exp,
+ struct md_op_data *op_data)
+{
+ LIST_HEAD(cancels);
+ struct ptlrpc_request *req;
+ int rc, count;
+ struct mdc_swap_layouts *msl, *payload;
+
+ msl = op_data->op_data;
+
+ /* When the MDT will get the MDS_SWAP_LAYOUTS RPC the
+ * first thing it will do is to cancel the 2 layout
+ * locks hold by this client.
+ * So the client must cancel its layout locks on the 2 fids
+ * with the request RPC to avoid extra RPC round trips
+ */
+ count = mdc_resource_get_unused(exp, &op_data->op_fid1, &cancels,
+ LCK_CR, MDS_INODELOCK_LAYOUT);
+ count += mdc_resource_get_unused(exp, &op_data->op_fid2, &cancels,
+ LCK_CR, MDS_INODELOCK_LAYOUT);
+
+ req = ptlrpc_request_alloc(class_exp2cliimp(exp),
+ &RQF_MDS_SWAP_LAYOUTS);
+ if (req == NULL) {
+ ldlm_lock_list_put(&cancels, l_bl_ast, count);
+ return -ENOMEM;
+ }
+
+ mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
+ mdc_set_capa_size(req, &RMF_CAPA2, op_data->op_capa2);
+
+ rc = mdc_prep_elc_req(exp, req, MDS_SWAP_LAYOUTS, &cancels, count);
+ if (rc) {
+ ptlrpc_request_free(req);
+ return rc;
+ }
+
+ mdc_swap_layouts_pack(req, op_data);
+
+ payload = req_capsule_client_get(&req->rq_pill, &RMF_SWAP_LAYOUTS);
+ LASSERT(payload);
+
+ *payload = *msl;
+
+ ptlrpc_request_set_replen(req);
+
+ rc = ptlrpc_queue_wait(req);
+ if (rc)
+ goto out;
+
+out:
+ ptlrpc_req_finished(req);
+ return rc;
+}
+
+static int mdc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
+ void *karg, void *uarg)
+{
+ struct obd_device *obd = exp->exp_obd;
+ struct obd_ioctl_data *data = karg;
+ struct obd_import *imp = obd->u.cli.cl_import;
+ int rc;
+
+ if (!try_module_get(THIS_MODULE)) {
+ CERROR("Can't get module. Is it alive?");
+ return -EINVAL;
+ }
+ switch (cmd) {
+ case OBD_IOC_CHANGELOG_SEND:
+ rc = mdc_ioc_changelog_send(obd, karg);
+ goto out;
+ case OBD_IOC_CHANGELOG_CLEAR: {
+ struct ioc_changelog *icc = karg;
+ struct changelog_setinfo cs = {
+ .cs_recno = icc->icc_recno,
+ .cs_id = icc->icc_id
+ };
+
+ rc = obd_set_info_async(NULL, exp, strlen(KEY_CHANGELOG_CLEAR),
+ KEY_CHANGELOG_CLEAR, sizeof(cs), &cs,
+ NULL);
+ goto out;
+ }
+ case OBD_IOC_FID2PATH:
+ rc = mdc_ioc_fid2path(exp, karg);
+ goto out;
+ case LL_IOC_HSM_CT_START:
+ rc = mdc_ioc_hsm_ct_start(exp, karg);
+ /* ignore if it was already registered on this MDS. */
+ if (rc == -EEXIST)
+ rc = 0;
+ goto out;
+ case LL_IOC_HSM_PROGRESS:
+ rc = mdc_ioc_hsm_progress(exp, karg);
+ goto out;
+ case LL_IOC_HSM_STATE_GET:
+ rc = mdc_ioc_hsm_state_get(exp, karg);
+ goto out;
+ case LL_IOC_HSM_STATE_SET:
+ rc = mdc_ioc_hsm_state_set(exp, karg);
+ goto out;
+ case LL_IOC_HSM_ACTION:
+ rc = mdc_ioc_hsm_current_action(exp, karg);
+ goto out;
+ case LL_IOC_HSM_REQUEST:
+ rc = mdc_ioc_hsm_request(exp, karg);
+ goto out;
+ case OBD_IOC_CLIENT_RECOVER:
+ rc = ptlrpc_recover_import(imp, data->ioc_inlbuf1, 0);
+ if (rc < 0)
+ goto out;
+ rc = 0;
+ goto out;
+ case IOC_OSC_SET_ACTIVE:
+ rc = ptlrpc_set_import_active(imp, data->ioc_offset);
+ goto out;
+ case OBD_IOC_POLL_QUOTACHECK:
+ rc = mdc_quota_poll_check(exp, (struct if_quotacheck *)karg);
+ goto out;
+ case OBD_IOC_PING_TARGET:
+ rc = ptlrpc_obd_ping(obd);
+ goto out;
+ /*
+ * Normally IOC_OBD_STATFS, OBD_IOC_QUOTACTL iocontrol are handled by
+ * LMV instead of MDC. But when the cluster is upgraded from 1.8,
+ * there'd be no LMV layer thus we might be called here. Eventually
+ * this code should be removed.
+ * bz20731, LU-592.
+ */
+ case IOC_OBD_STATFS: {
+ struct obd_statfs stat_buf = {0};
+
+ if (*((__u32 *) data->ioc_inlbuf2) != 0) {
+ rc = -ENODEV;
+ goto out;
+ }
+
+ /* copy UUID */
+ if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(obd),
+ min_t(size_t, data->ioc_plen2,
+ sizeof(struct obd_uuid)))) {
+ rc = -EFAULT;
+ goto out;
+ }
+
+ rc = mdc_statfs(NULL, obd->obd_self_export, &stat_buf,
+ cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
+ 0);
+ if (rc != 0)
+ goto out;
+
+ if (copy_to_user(data->ioc_pbuf1, &stat_buf,
+ min_t(size_t, data->ioc_plen1,
+ sizeof(stat_buf)))) {
+ rc = -EFAULT;
+ goto out;
+ }
+
+ rc = 0;
+ goto out;
+ }
+ case OBD_IOC_QUOTACTL: {
+ struct if_quotactl *qctl = karg;
+ struct obd_quotactl *oqctl;
+
+ OBD_ALLOC_PTR(oqctl);
+ if (oqctl == NULL) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ QCTL_COPY(oqctl, qctl);
+ rc = obd_quotactl(exp, oqctl);
+ if (rc == 0) {
+ QCTL_COPY(qctl, oqctl);
+ qctl->qc_valid = QC_MDTIDX;
+ qctl->obd_uuid = obd->u.cli.cl_target_uuid;
+ }
+
+ OBD_FREE_PTR(oqctl);
+ goto out;
+ }
+ case LL_IOC_GET_CONNECT_FLAGS:
+ if (copy_to_user(uarg, exp_connect_flags_ptr(exp),
+ sizeof(*exp_connect_flags_ptr(exp)))) {
+ rc = -EFAULT;
+ goto out;
+ }
+
+ rc = 0;
+ goto out;
+ case LL_IOC_LOV_SWAP_LAYOUTS:
+ rc = mdc_ioc_swap_layouts(exp, karg);
+ goto out;
+ default:
+ CERROR("unrecognised ioctl: cmd = %#x\n", cmd);
+ rc = -ENOTTY;
+ goto out;
+ }
+out:
+ module_put(THIS_MODULE);
+
+ return rc;
+}
+
+static int mdc_get_info_rpc(struct obd_export *exp,
+ u32 keylen, void *key,
+ int vallen, void *val)
+{
+ struct obd_import *imp = class_exp2cliimp(exp);
+ struct ptlrpc_request *req;
+ char *tmp;
+ int rc = -EINVAL;
+
+ req = ptlrpc_request_alloc(imp, &RQF_MDS_GET_INFO);
+ if (req == NULL)
+ return -ENOMEM;
+
+ req_capsule_set_size(&req->rq_pill, &RMF_GETINFO_KEY,
+ RCL_CLIENT, keylen);
+ req_capsule_set_size(&req->rq_pill, &RMF_GETINFO_VALLEN,
+ RCL_CLIENT, sizeof(__u32));
+
+ rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GET_INFO);
+ if (rc) {
+ ptlrpc_request_free(req);
+ return rc;
+ }
+
+ tmp = req_capsule_client_get(&req->rq_pill, &RMF_GETINFO_KEY);
+ memcpy(tmp, key, keylen);
+ tmp = req_capsule_client_get(&req->rq_pill, &RMF_GETINFO_VALLEN);
+ memcpy(tmp, &vallen, sizeof(__u32));
+
+ req_capsule_set_size(&req->rq_pill, &RMF_GETINFO_VAL,
+ RCL_SERVER, vallen);
+ ptlrpc_request_set_replen(req);
+
+ rc = ptlrpc_queue_wait(req);
+ /* -EREMOTE means the get_info result is partial, and it needs to
+ * continue on another MDT, see fid2path part in lmv_iocontrol */
+ if (rc == 0 || rc == -EREMOTE) {
+ tmp = req_capsule_server_get(&req->rq_pill, &RMF_GETINFO_VAL);
+ memcpy(val, tmp, vallen);
+ if (ptlrpc_rep_need_swab(req)) {
+ if (KEY_IS(KEY_FID2PATH))
+ lustre_swab_fid2path(val);
+ }
+ }
+ ptlrpc_req_finished(req);
+
+ return rc;
+}
+
+static void lustre_swab_hai(struct hsm_action_item *h)
+{
+ __swab32s(&h->hai_len);
+ __swab32s(&h->hai_action);
+ lustre_swab_lu_fid(&h->hai_fid);
+ lustre_swab_lu_fid(&h->hai_dfid);
+ __swab64s(&h->hai_cookie);
+ __swab64s(&h->hai_extent.offset);
+ __swab64s(&h->hai_extent.length);
+ __swab64s(&h->hai_gid);
+}
+
+static void lustre_swab_hal(struct hsm_action_list *h)
+{
+ struct hsm_action_item *hai;
+ int i;
+
+ __swab32s(&h->hal_version);
+ __swab32s(&h->hal_count);
+ __swab32s(&h->hal_archive_id);
+ __swab64s(&h->hal_flags);
+ hai = hai_zero(h);
+ for (i = 0; i < h->hal_count; i++, hai = hai_next(hai))
+ lustre_swab_hai(hai);
+}
+
+static void lustre_swab_kuch(struct kuc_hdr *l)
+{
+ __swab16s(&l->kuc_magic);
+ /* __u8 l->kuc_transport */
+ __swab16s(&l->kuc_msgtype);
+ __swab16s(&l->kuc_msglen);
+}
+
+static int mdc_ioc_hsm_ct_start(struct obd_export *exp,
+ struct lustre_kernelcomm *lk)
+{
+ struct obd_import *imp = class_exp2cliimp(exp);
+ __u32 archive = lk->lk_data;
+ int rc = 0;
+
+ if (lk->lk_group != KUC_GRP_HSM) {
+ CERROR("Bad copytool group %d\n", lk->lk_group);
+ return -EINVAL;
+ }
+
+ CDEBUG(D_HSM, "CT start r%d w%d u%d g%d f%#x\n", lk->lk_rfd, lk->lk_wfd,
+ lk->lk_uid, lk->lk_group, lk->lk_flags);
+
+ if (lk->lk_flags & LK_FLG_STOP) {
+ /* Unregister with the coordinator */
+ rc = mdc_ioc_hsm_ct_unregister(imp);
+ } else {
+ rc = mdc_ioc_hsm_ct_register(imp, archive);
+ }
+
+ return rc;
+}
+
+/**
+ * Send a message to any listening copytools
+ * @param val KUC message (kuc_hdr + hsm_action_list)
+ * @param len total length of message
+ */
+static int mdc_hsm_copytool_send(int len, void *val)
+{
+ struct kuc_hdr *lh = (struct kuc_hdr *)val;
+ struct hsm_action_list *hal = (struct hsm_action_list *)(lh + 1);
+ int rc;
+
+ if (len < sizeof(*lh) + sizeof(*hal)) {
+ CERROR("Short HSM message %d < %d\n", len,
+ (int) (sizeof(*lh) + sizeof(*hal)));
+ return -EPROTO;
+ }
+ if (lh->kuc_magic == __swab16(KUC_MAGIC)) {
+ lustre_swab_kuch(lh);
+ lustre_swab_hal(hal);
+ } else if (lh->kuc_magic != KUC_MAGIC) {
+ CERROR("Bad magic %x!=%x\n", lh->kuc_magic, KUC_MAGIC);
+ return -EPROTO;
+ }
+
+ CDEBUG(D_HSM,
+ "Received message mg=%x t=%d m=%d l=%d actions=%d on %s\n",
+ lh->kuc_magic, lh->kuc_transport, lh->kuc_msgtype,
+ lh->kuc_msglen, hal->hal_count, hal->hal_fsname);
+
+ /* Broadcast to HSM listeners */
+ rc = libcfs_kkuc_group_put(KUC_GRP_HSM, lh);
+
+ return rc;
+}
+
+/**
+ * callback function passed to kuc for re-registering each HSM copytool
+ * running on MDC, after MDT shutdown/recovery.
+ * @param data archive id served by the copytool
+ * @param cb_arg callback argument (obd_import)
+ */
+static int mdc_hsm_ct_reregister(__u32 data, void *cb_arg)
+{
+ struct obd_import *imp = (struct obd_import *)cb_arg;
+ __u32 archive = data;
+ int rc;
+
+ CDEBUG(D_HA, "recover copytool registration to MDT (archive=%#x)\n",
+ archive);
+ rc = mdc_ioc_hsm_ct_register(imp, archive);
+
+ /* ignore error if the copytool is already registered */
+ return ((rc != 0) && (rc != -EEXIST)) ? rc : 0;
+}
+
+/**
+ * Re-establish all kuc contexts with MDT
+ * after MDT shutdown/recovery.
+ */
+static int mdc_kuc_reregister(struct obd_import *imp)
+{
+ /* re-register HSM agents */
+ return libcfs_kkuc_group_foreach(KUC_GRP_HSM, mdc_hsm_ct_reregister,
+ (void *)imp);
+}
+
+static int mdc_set_info_async(const struct lu_env *env,
+ struct obd_export *exp,
+ u32 keylen, void *key,
+ u32 vallen, void *val,
+ struct ptlrpc_request_set *set)
+{
+ struct obd_import *imp = class_exp2cliimp(exp);
+ int rc;
+
+ if (KEY_IS(KEY_READ_ONLY)) {
+ if (vallen != sizeof(int))
+ return -EINVAL;
+
+ spin_lock(&imp->imp_lock);
+ if (*((int *)val)) {
+ imp->imp_connect_flags_orig |= OBD_CONNECT_RDONLY;
+ imp->imp_connect_data.ocd_connect_flags |=
+ OBD_CONNECT_RDONLY;
+ } else {
+ imp->imp_connect_flags_orig &= ~OBD_CONNECT_RDONLY;
+ imp->imp_connect_data.ocd_connect_flags &=
+ ~OBD_CONNECT_RDONLY;
+ }
+ spin_unlock(&imp->imp_lock);
+
+ rc = do_set_info_async(imp, MDS_SET_INFO, LUSTRE_MDS_VERSION,
+ keylen, key, vallen, val, set);
+ return rc;
+ }
+ if (KEY_IS(KEY_SPTLRPC_CONF)) {
+ sptlrpc_conf_client_adapt(exp->exp_obd);
+ return 0;
+ }
+ if (KEY_IS(KEY_FLUSH_CTX)) {
+ sptlrpc_import_flush_my_ctx(imp);
+ return 0;
+ }
+ if (KEY_IS(KEY_CHANGELOG_CLEAR)) {
+ rc = do_set_info_async(imp, MDS_SET_INFO, LUSTRE_MDS_VERSION,
+ keylen, key, vallen, val, set);
+ return rc;
+ }
+ if (KEY_IS(KEY_HSM_COPYTOOL_SEND)) {
+ rc = mdc_hsm_copytool_send(vallen, val);
+ return rc;
+ }
+
+ CERROR("Unknown key %s\n", (char *)key);
+ return -EINVAL;
+}
+
+static int mdc_get_info(const struct lu_env *env, struct obd_export *exp,
+ __u32 keylen, void *key, __u32 *vallen, void *val,
+ struct lov_stripe_md *lsm)
+{
+ int rc = -EINVAL;
+
+ if (KEY_IS(KEY_MAX_EASIZE)) {
+ int mdsize, *max_easize;
+
+ if (*vallen != sizeof(int))
+ return -EINVAL;
+ mdsize = *(int *)val;
+ if (mdsize > exp->exp_obd->u.cli.cl_max_mds_easize)
+ exp->exp_obd->u.cli.cl_max_mds_easize = mdsize;
+ max_easize = val;
+ *max_easize = exp->exp_obd->u.cli.cl_max_mds_easize;
+ return 0;
+ } else if (KEY_IS(KEY_DEFAULT_EASIZE)) {
+ int *default_easize;
+
+ if (*vallen != sizeof(int))
+ return -EINVAL;
+ default_easize = val;
+ *default_easize = exp->exp_obd->u.cli.cl_default_mds_easize;
+ return 0;
+ } else if (KEY_IS(KEY_MAX_COOKIESIZE)) {
+ int mdsize, *max_cookiesize;
+
+ if (*vallen != sizeof(int))
+ return -EINVAL;
+ mdsize = *(int *)val;
+ if (mdsize > exp->exp_obd->u.cli.cl_max_mds_cookiesize)
+ exp->exp_obd->u.cli.cl_max_mds_cookiesize = mdsize;
+ max_cookiesize = val;
+ *max_cookiesize = exp->exp_obd->u.cli.cl_max_mds_cookiesize;
+ return 0;
+ } else if (KEY_IS(KEY_DEFAULT_COOKIESIZE)) {
+ int *default_cookiesize;
+
+ if (*vallen != sizeof(int))
+ return -EINVAL;
+ default_cookiesize = val;
+ *default_cookiesize =
+ exp->exp_obd->u.cli.cl_default_mds_cookiesize;
+ return 0;
+ } else if (KEY_IS(KEY_CONN_DATA)) {
+ struct obd_import *imp = class_exp2cliimp(exp);
+ struct obd_connect_data *data = val;
+
+ if (*vallen != sizeof(*data))
+ return -EINVAL;
+
+ *data = imp->imp_connect_data;
+ return 0;
+ } else if (KEY_IS(KEY_TGT_COUNT)) {
+ *((int *)val) = 1;
+ return 0;
+ }
+
+ rc = mdc_get_info_rpc(exp, keylen, key, *vallen, val);
+
+ return rc;
+}
+
+static int mdc_sync(struct obd_export *exp, const struct lu_fid *fid,
+ struct obd_capa *oc, struct ptlrpc_request **request)
+{
+ struct ptlrpc_request *req;
+ int rc;
+
+ *request = NULL;
+ req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_SYNC);
+ if (req == NULL)
+ return -ENOMEM;
+
+ mdc_set_capa_size(req, &RMF_CAPA1, oc);
+
+ rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_SYNC);
+ if (rc) {
+ ptlrpc_request_free(req);
+ return rc;
+ }
+
+ mdc_pack_body(req, fid, oc, 0, 0, -1, 0);
+
+ ptlrpc_request_set_replen(req);
+
+ rc = ptlrpc_queue_wait(req);
+ if (rc)
+ ptlrpc_req_finished(req);
+ else
+ *request = req;
+ return rc;
+}
+
+static int mdc_import_event(struct obd_device *obd, struct obd_import *imp,
+ enum obd_import_event event)
+{
+ int rc = 0;
+
+ LASSERT(imp->imp_obd == obd);
+
+ switch (event) {
+ case IMP_EVENT_DISCON: {
+#if 0
+ /* XXX Pass event up to OBDs stack. used only for FLD now */
+ rc = obd_notify_observer(obd, obd, OBD_NOTIFY_DISCON, NULL);
+#endif
+ break;
+ }
+ case IMP_EVENT_INACTIVE: {
+ struct client_obd *cli = &obd->u.cli;
+ /*
+ * Flush current sequence to make client obtain new one
+ * from server in case of disconnect/reconnect.
+ */
+ if (cli->cl_seq != NULL)
+ seq_client_flush(cli->cl_seq);
+
+ rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE, NULL);
+ break;
+ }
+ case IMP_EVENT_INVALIDATE: {
+ struct ldlm_namespace *ns = obd->obd_namespace;
+
+ ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
+
+ break;
+ }
+ case IMP_EVENT_ACTIVE:
+ rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE, NULL);
+ /* redo the kuc registration after reconnecting */
+ if (rc == 0)
+ rc = mdc_kuc_reregister(imp);
+ break;
+ case IMP_EVENT_OCD:
+ rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD, NULL);
+ break;
+ case IMP_EVENT_DEACTIVATE:
+ case IMP_EVENT_ACTIVATE:
+ break;
+ default:
+ CERROR("Unknown import event %x\n", event);
+ LBUG();
+ }
+ return rc;
+}
+
+int mdc_fid_alloc(struct obd_export *exp, struct lu_fid *fid,
+ struct md_op_data *op_data)
+{
+ struct client_obd *cli = &exp->exp_obd->u.cli;
+ struct lu_client_seq *seq = cli->cl_seq;
+
+ return seq_client_alloc_fid(NULL, seq, fid);
+}
+
+static struct obd_uuid *mdc_get_uuid(struct obd_export *exp)
+{
+ struct client_obd *cli = &exp->exp_obd->u.cli;
+
+ return &cli->cl_target_uuid;
+}
+
+/**
+ * Determine whether the lock can be canceled before replaying it during
+ * recovery, non zero value will be return if the lock can be canceled,
+ * or zero returned for not
+ */
+static int mdc_cancel_for_recovery(struct ldlm_lock *lock)
+{
+ if (lock->l_resource->lr_type != LDLM_IBITS)
+ return 0;
+
+ /* FIXME: if we ever get into a situation where there are too many
+ * opened files with open locks on a single node, then we really
+ * should replay these open locks to reget it */
+ if (lock->l_policy_data.l_inodebits.bits & MDS_INODELOCK_OPEN)
+ return 0;
+
+ return 1;
+}
+
+static int mdc_resource_inode_free(struct ldlm_resource *res)
+{
+ if (res->lr_lvb_inode)
+ res->lr_lvb_inode = NULL;
+
+ return 0;
+}
+
+static struct ldlm_valblock_ops inode_lvbo = {
+ .lvbo_free = mdc_resource_inode_free,
+};
+
+static int mdc_llog_init(struct obd_device *obd)
+{
+ struct obd_llog_group *olg = &obd->obd_olg;
+ struct llog_ctxt *ctxt;
+ int rc;
+
+ rc = llog_setup(NULL, obd, olg, LLOG_CHANGELOG_REPL_CTXT, obd,
+ &llog_client_ops);
+ if (rc)
+ return rc;
+
+ ctxt = llog_group_get_ctxt(olg, LLOG_CHANGELOG_REPL_CTXT);
+ llog_initiator_connect(ctxt);
+ llog_ctxt_put(ctxt);
+
+ return 0;
+}
+
+static void mdc_llog_finish(struct obd_device *obd)
+{
+ struct llog_ctxt *ctxt;
+
+ ctxt = llog_get_context(obd, LLOG_CHANGELOG_REPL_CTXT);
+ if (ctxt)
+ llog_cleanup(NULL, ctxt);
+}
+
+static int mdc_setup(struct obd_device *obd, struct lustre_cfg *cfg)
+{
+ struct client_obd *cli = &obd->u.cli;
+ struct lprocfs_static_vars lvars = { NULL };
+ int rc;
+
+ OBD_ALLOC(cli->cl_rpc_lock, sizeof(*cli->cl_rpc_lock));
+ if (!cli->cl_rpc_lock)
+ return -ENOMEM;
+ mdc_init_rpc_lock(cli->cl_rpc_lock);
+
+ ptlrpcd_addref();
+
+ OBD_ALLOC(cli->cl_close_lock, sizeof(*cli->cl_close_lock));
+ if (!cli->cl_close_lock) {
+ rc = -ENOMEM;
+ goto err_rpc_lock;
+ }
+ mdc_init_rpc_lock(cli->cl_close_lock);
+
+ rc = client_obd_setup(obd, cfg);
+ if (rc)
+ goto err_close_lock;
+ lprocfs_mdc_init_vars(&lvars);
+ lprocfs_obd_setup(obd, lvars.obd_vars);
+ sptlrpc_lprocfs_cliobd_attach(obd);
+ ptlrpc_lprocfs_register_obd(obd);
+
+ ns_register_cancel(obd->obd_namespace, mdc_cancel_for_recovery);
+
+ obd->obd_namespace->ns_lvbo = &inode_lvbo;
+
+ rc = mdc_llog_init(obd);
+ if (rc) {
+ mdc_cleanup(obd);
+ CERROR("failed to setup llogging subsystems\n");
+ }
+
+ return rc;
+
+err_close_lock:
+ OBD_FREE(cli->cl_close_lock, sizeof(*cli->cl_close_lock));
+err_rpc_lock:
+ OBD_FREE(cli->cl_rpc_lock, sizeof(*cli->cl_rpc_lock));
+ ptlrpcd_decref();
+ return rc;
+}
+
+/* Initialize the default and maximum LOV EA and cookie sizes. This allows
+ * us to make MDS RPCs with large enough reply buffers to hold a default
+ * sized EA and cookie without having to calculate this (via a call into the
+ * LOV + OSCs) each time we make an RPC. The maximum size is also tracked
+ * but not used to avoid wastefully vmalloc()'ing large reply buffers when
+ * a large number of stripes is possible. If a larger reply buffer is
+ * required it will be reallocated in the ptlrpc layer due to overflow.
+ */
+static int mdc_init_ea_size(struct obd_export *exp, int easize,
+ int def_easize, int cookiesize, int def_cookiesize)
+{
+ struct obd_device *obd = exp->exp_obd;
+ struct client_obd *cli = &obd->u.cli;
+
+ if (cli->cl_max_mds_easize < easize)
+ cli->cl_max_mds_easize = easize;
+
+ if (cli->cl_default_mds_easize < def_easize)
+ cli->cl_default_mds_easize = def_easize;
+
+ if (cli->cl_max_mds_cookiesize < cookiesize)
+ cli->cl_max_mds_cookiesize = cookiesize;
+
+ if (cli->cl_default_mds_cookiesize < def_cookiesize)
+ cli->cl_default_mds_cookiesize = def_cookiesize;
+
+ return 0;
+}
+
+static int mdc_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
+{
+ switch (stage) {
+ case OBD_CLEANUP_EARLY:
+ break;
+ case OBD_CLEANUP_EXPORTS:
+ /* Failsafe, ok if racy */
+ if (obd->obd_type->typ_refcnt <= 1)
+ libcfs_kkuc_group_rem(0, KUC_GRP_HSM);
+
+ obd_cleanup_client_import(obd);
+ ptlrpc_lprocfs_unregister_obd(obd);
+ lprocfs_obd_cleanup(obd);
+
+ mdc_llog_finish(obd);
+ break;
+ }
+ return 0;
+}
+
+static int mdc_cleanup(struct obd_device *obd)
+{
+ struct client_obd *cli = &obd->u.cli;
+
+ OBD_FREE(cli->cl_rpc_lock, sizeof(*cli->cl_rpc_lock));
+ OBD_FREE(cli->cl_close_lock, sizeof(*cli->cl_close_lock));
+
+ ptlrpcd_decref();
+
+ return client_obd_cleanup(obd);
+}
+
+static int mdc_process_config(struct obd_device *obd, u32 len, void *buf)
+{
+ struct lustre_cfg *lcfg = buf;
+ struct lprocfs_static_vars lvars = { NULL };
+ int rc = 0;
+
+ lprocfs_mdc_init_vars(&lvars);
+ switch (lcfg->lcfg_command) {
+ default:
+ rc = class_process_proc_param(PARAM_MDC, lvars.obd_vars,
+ lcfg, obd);
+ if (rc > 0)
+ rc = 0;
+ break;
+ }
+ return rc;
+}
+
+
+/* get remote permission for current user on fid */
+static int mdc_get_remote_perm(struct obd_export *exp, const struct lu_fid *fid,
+ struct obd_capa *oc, __u32 suppgid,
+ struct ptlrpc_request **request)
+{
+ struct ptlrpc_request *req;
+ int rc;
+
+ LASSERT(client_is_remote(exp));
+
+ *request = NULL;
+ req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_GETATTR);
+ if (req == NULL)
+ return -ENOMEM;
+
+ mdc_set_capa_size(req, &RMF_CAPA1, oc);
+
+ rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GETATTR);
+ if (rc) {
+ ptlrpc_request_free(req);
+ return rc;
+ }
+
+ mdc_pack_body(req, fid, oc, OBD_MD_FLRMTPERM, 0, suppgid, 0);
+
+ req_capsule_set_size(&req->rq_pill, &RMF_ACL, RCL_SERVER,
+ sizeof(struct mdt_remote_perm));
+
+ ptlrpc_request_set_replen(req);
+
+ rc = ptlrpc_queue_wait(req);
+ if (rc)
+ ptlrpc_req_finished(req);
+ else
+ *request = req;
+ return rc;
+}
+
+static int mdc_interpret_renew_capa(const struct lu_env *env,
+ struct ptlrpc_request *req, void *args,
+ int status)
+{
+ struct mdc_renew_capa_args *ra = args;
+ struct mdt_body *body = NULL;
+ struct lustre_capa *capa;
+
+ if (status) {
+ capa = ERR_PTR(status);
+ goto out;
+ }
+
+ body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
+ if (body == NULL) {
+ capa = ERR_PTR(-EFAULT);
+ goto out;
+ }
+
+ if ((body->valid & OBD_MD_FLOSSCAPA) == 0) {
+ capa = ERR_PTR(-ENOENT);
+ goto out;
+ }
+
+ capa = req_capsule_server_get(&req->rq_pill, &RMF_CAPA2);
+ if (!capa) {
+ capa = ERR_PTR(-EFAULT);
+ goto out;
+ }
+out:
+ ra->ra_cb(ra->ra_oc, capa);
+ return 0;
+}
+
+static int mdc_renew_capa(struct obd_export *exp, struct obd_capa *oc,
+ renew_capa_cb_t cb)
+{
+ struct ptlrpc_request *req;
+ struct mdc_renew_capa_args *ra;
+
+ req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp), &RQF_MDS_GETATTR,
+ LUSTRE_MDS_VERSION, MDS_GETATTR);
+ if (req == NULL)
+ return -ENOMEM;
+
+ /* NB, OBD_MD_FLOSSCAPA is set here, but it doesn't necessarily mean the
+ * capa to renew is oss capa.
+ */
+ mdc_pack_body(req, &oc->c_capa.lc_fid, oc, OBD_MD_FLOSSCAPA, 0, -1, 0);
+ ptlrpc_request_set_replen(req);
+
+ CLASSERT(sizeof(*ra) <= sizeof(req->rq_async_args));
+ ra = ptlrpc_req_async_args(req);
+ ra->ra_oc = oc;
+ ra->ra_cb = cb;
+ req->rq_interpret_reply = mdc_interpret_renew_capa;
+ ptlrpcd_add_req(req, PDL_POLICY_LOCAL, -1);
+ return 0;
+}
+
+static struct obd_ops mdc_obd_ops = {
+ .o_owner = THIS_MODULE,
+ .o_setup = mdc_setup,
+ .o_precleanup = mdc_precleanup,
+ .o_cleanup = mdc_cleanup,
+ .o_add_conn = client_import_add_conn,
+ .o_del_conn = client_import_del_conn,
+ .o_connect = client_connect_import,
+ .o_disconnect = client_disconnect_export,
+ .o_iocontrol = mdc_iocontrol,
+ .o_set_info_async = mdc_set_info_async,
+ .o_statfs = mdc_statfs,
+ .o_fid_init = client_fid_init,
+ .o_fid_fini = client_fid_fini,
+ .o_fid_alloc = mdc_fid_alloc,
+ .o_import_event = mdc_import_event,
+ .o_get_info = mdc_get_info,
+ .o_process_config = mdc_process_config,
+ .o_get_uuid = mdc_get_uuid,
+ .o_quotactl = mdc_quotactl,
+ .o_quotacheck = mdc_quotacheck
+};
+
+static struct md_ops mdc_md_ops = {
+ .m_getstatus = mdc_getstatus,
+ .m_null_inode = mdc_null_inode,
+ .m_find_cbdata = mdc_find_cbdata,
+ .m_close = mdc_close,
+ .m_create = mdc_create,
+ .m_done_writing = mdc_done_writing,
+ .m_enqueue = mdc_enqueue,
+ .m_getattr = mdc_getattr,
+ .m_getattr_name = mdc_getattr_name,
+ .m_intent_lock = mdc_intent_lock,
+ .m_link = mdc_link,
+ .m_is_subdir = mdc_is_subdir,
+ .m_rename = mdc_rename,
+ .m_setattr = mdc_setattr,
+ .m_setxattr = mdc_setxattr,
+ .m_getxattr = mdc_getxattr,
+ .m_sync = mdc_sync,
+ .m_readpage = mdc_readpage,
+ .m_unlink = mdc_unlink,
+ .m_cancel_unused = mdc_cancel_unused,
+ .m_init_ea_size = mdc_init_ea_size,
+ .m_set_lock_data = mdc_set_lock_data,
+ .m_lock_match = mdc_lock_match,
+ .m_get_lustre_md = mdc_get_lustre_md,
+ .m_free_lustre_md = mdc_free_lustre_md,
+ .m_set_open_replay_data = mdc_set_open_replay_data,
+ .m_clear_open_replay_data = mdc_clear_open_replay_data,
+ .m_renew_capa = mdc_renew_capa,
+ .m_unpack_capa = mdc_unpack_capa,
+ .m_get_remote_perm = mdc_get_remote_perm,
+ .m_intent_getattr_async = mdc_intent_getattr_async,
+ .m_revalidate_lock = mdc_revalidate_lock
+};
+
+static int __init mdc_init(void)
+{
+ struct lprocfs_static_vars lvars = { NULL };
+
+ lprocfs_mdc_init_vars(&lvars);
+
+ return class_register_type(&mdc_obd_ops, &mdc_md_ops, lvars.module_vars,
+ LUSTRE_MDC_NAME, NULL);
+}
+
+static void /*__exit*/ mdc_exit(void)
+{
+ class_unregister_type(LUSTRE_MDC_NAME);
+}
+
+MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
+MODULE_DESCRIPTION("Lustre Metadata Client");
+MODULE_LICENSE("GPL");
+
+module_init(mdc_init);
+module_exit(mdc_exit);
Code Review / kvmfornfv.git / blobdiff