diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/mdc/mdc_request.c')
| -rw-r--r-- | drivers/staging/lustre/lustre/mdc/mdc_request.c | 2753 |
1 files changed, 2753 insertions, 0 deletions
diff --git a/drivers/staging/lustre/lustre/mdc/mdc_request.c b/drivers/staging/lustre/lustre/mdc/mdc_request.c new file mode 100644 index 000000000000..3cf9d8d3f2ec --- /dev/null +++ b/drivers/staging/lustre/lustre/mdc/mdc_request.c @@ -0,0 +1,2753 @@ +/* + * 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 <lustre_acl.h> +#include <obd_class.h> +#include <lustre_fid.h> +#include <lprocfs_status.h> +#include <lustre_param.h> +#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); + +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; + ENTRY; + + /* 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; + ENTRY; + + 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, rc); + + body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY); + if (body == NULL) + GOTO(out, rc = -EPROTO); + + if (body->valid & OBD_MD_FLMDSCAPA) { + rc = mdc_unpack_capa(NULL, req, &RMF_CAPA1, pc); + if (rc) + GOTO(out, rc); + } + + *rootfid = body->fid1; + CDEBUG(D_NET, + "root fid="DFID", last_committed="LPU64"\n", + PFID(rootfid), + lustre_msg_get_last_committed(req->rq_repmsg)); + EXIT; +out: + ptlrpc_req_finished(req); + return rc; +} + +/* This should be mdc_get_info("rootfid") */ +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; + ENTRY; + + /* 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); +} + +int mdc_getattr(struct obd_export *exp, struct md_op_data *op_data, + struct ptlrpc_request **request) +{ + struct ptlrpc_request *req; + int rc; + ENTRY; + + /* 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); +} + +int mdc_getattr_name(struct obd_export *exp, struct md_op_data *op_data, + struct ptlrpc_request **request) +{ + struct ptlrpc_request *req; + int rc; + ENTRY; + + *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; + + ENTRY; + + *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, obd_valid 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; + ENTRY; + + *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); + } + + 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; + /* TODO: + * cfs_curproc_fs{u,g}id() should replace + * current->fs{u,g}id for portability. + */ + rec->sx_fsuid = current_fsuid(); + rec->sx_fsgid = 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 = cfs_time_current_sec(); + 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); +} + +int mdc_setxattr(struct obd_export *exp, const struct lu_fid *fid, + struct obd_capa *oc, obd_valid 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); +} + +int mdc_getxattr(struct obd_export *exp, const struct lu_fid *fid, + struct obd_capa *oc, obd_valid 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; + ENTRY; + + 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 (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; + ENTRY; + + 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"); + GOTO(out, rc = -EPROTO); + } + + if (md->body->eadatasize == 0) { + CDEBUG(D_INFO, "OBD_MD_FLEASIZE set, " + "but eadatasize 0\n"); + GOTO(out, rc = -EPROTO); + } + lmmsize = md->body->eadatasize; + lmm = req_capsule_server_sized_get(pill, &RMF_MDT_MD, lmmsize); + if (!lmm) + GOTO(out, rc = -EPROTO); + + rc = obd_unpackmd(dt_exp, &md->lsm, lmm, lmmsize); + if (rc < 0) + GOTO(out, rc); + + if (rc < sizeof(*md->lsm)) { + CDEBUG(D_INFO, "lsm size too small: " + "rc < sizeof (*md->lsm) (%d < %d)\n", + rc, (int)sizeof(*md->lsm)); + GOTO(out, rc = -EPROTO); + } + + } 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"); + GOTO(out, rc = -EPROTO); + } + + 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) + GOTO(out, rc = -EPROTO); + + rc = obd_unpackmd(md_exp, (void *)&md->mea, lmv, + lmvsize); + if (rc < 0) + GOTO(out, rc); + + if (rc < sizeof(*md->mea)) { + CDEBUG(D_INFO, "size too small: " + "rc < sizeof(*md->mea) (%d < %d)\n", + rc, (int)sizeof(*md->mea)); + GOTO(out, rc = -EPROTO); + } + } + } + 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) + GOTO(out, rc = -EPROTO); + } + 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, rc); +#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, rc); + 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, rc); + md->oss_capa = oc; + } + + EXIT; +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) +{ + ENTRY; + 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; + ENTRY; + + if (mod == NULL) { + DEBUG_REQ(D_ERROR, req, + "Can't properly replay without open data."); + EXIT; + 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 "LPX64" to "LPX64"\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; + } + EXIT; +} + +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 ptlrpc_request *open_req) +{ + struct md_open_data *mod; + struct mdt_rec_create *rec; + struct mdt_body *body; + struct obd_import *imp = open_req->rq_import; + ENTRY; + + 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_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); +} + +int mdc_clear_open_replay_data(struct obd_export *exp, + struct obd_client_handle *och) +{ + struct md_open_data *mod = och->och_mod; + ENTRY; + + /** + * 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); + + 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; + } +} + +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; + int rc; + ENTRY; + + *request = NULL; + req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_CLOSE); + 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_max_mds_easize); + req_capsule_set_size(&req->rq_pill, &RMF_LOGCOOKIES, RCL_SERVER, + obd->u.cli.cl_max_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); +} + +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; + ENTRY; + + 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; + /* 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); +} + + +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; + ENTRY; + + *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; + ENTRY; + + /* + * 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) + GOTO(output, rc = -ENOMEM); + + 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, rc); + } + + msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS); + if (msfs == NULL) + GOTO(out, rc = -EPROTO); + + *osfs = *msfs; + EXIT; +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 "LPU64" #%d\n", + PFID(&gf->gf_fid), gf->gf_recno, gf->gf_linkno); + + if (!fid_is_sane(&gf->gf_fid)) + GOTO(out, rc = -EINVAL); + + /* 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, rc); + + if (vallen <= sizeof(*gf)) + GOTO(out, rc = -EPROTO); + else if (vallen > sizeof(*gf) + gf->gf_pathlen) + GOTO(out, rc = -EOVERFLOW); + + CDEBUG(D_IOCTL, "path get "DFID" from "LPU64" #%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; + ENTRY; + + req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_HSM_PROGRESS, + LUSTRE_MDS_VERSION, MDS_HSM_PROGRESS); + if (req == NULL) + GOTO(out, rc = -ENOMEM); + + 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) + GOTO(out, rc = -EPROTO); + + *req_hpk = *hpk; + + ptlrpc_request_set_replen(req); + + rc = mdc_queue_wait(req); + GOTO(out, rc); +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; + ENTRY; + + req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_HSM_CT_REGISTER, + LUSTRE_MDS_VERSION, + MDS_HSM_CT_REGISTER); + if (req == NULL) + GOTO(out, rc = -ENOMEM); + + 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) + GOTO(out, rc = -EPROTO); + + *archive_mask = archives; + + ptlrpc_request_set_replen(req); + + rc = mdc_queue_wait(req); + GOTO(out, rc); +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; + ENTRY; + + 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, rc); + + req_hca = req_capsule_server_get(&req->rq_pill, + &RMF_MDS_HSM_CURRENT_ACTION); + if (req_hca == NULL) + GOTO(out, rc = -EPROTO); + + *hca = *req_hca; + + EXIT; +out: + ptlrpc_req_finished(req); + return rc; +} + +static int mdc_ioc_hsm_ct_unregister(struct obd_import *imp) +{ + struct ptlrpc_request *req; + int rc; + ENTRY; + + req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_HSM_CT_UNREGISTER, + LUSTRE_MDS_VERSION, + MDS_HSM_CT_UNREGISTER); + if (req == NULL) + GOTO(out, rc = -ENOMEM); + + mdc_pack_body(req, NULL, NULL, OBD_MD_FLRMTPERM, 0, 0, 0); + + ptlrpc_request_set_replen(req); + + rc = mdc_queue_wait(req); + GOTO(out, rc); +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; + ENTRY; + + 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, rc); + + req_hus = req_capsule_server_get(&req->rq_pill, &RMF_HSM_USER_STATE); + if (req_hus == NULL) + GOTO(out, rc = -EPROTO); + + *hus = *req_hus; + + EXIT; +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; + ENTRY; + + 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) + GOTO(out, rc = -EPROTO); + *req_hss = *hss; + + ptlrpc_request_set_replen(req); + + rc = mdc_queue_wait(req); + GOTO(out, rc); + + EXIT; +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; + ENTRY; + + req = ptlrpc_request_alloc(imp, &RQF_MDS_HSM_REQUEST); + if (req == NULL) + GOTO(out, rc = -ENOMEM); + + 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) + GOTO(out, rc = -EPROTO); + *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) + GOTO(out, rc = -EPROTO); + 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) + GOTO(out, rc = -EPROTO); + memcpy(req_opaque, hur_data(hur), hur->hur_request.hr_data_len); + + ptlrpc_request_set_replen(req); + + rc = mdc_queue_wait(req); + GOTO(out, rc); + +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 <= CR_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; + ENTRY; + + 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="LPU64" start="LPU64"\n", + rec->cr.cr_index, cs->cs_startrec); + RETURN(0); + } + + CDEBUG(D_CHANGELOG, LPU64" %02d%-5s "LPU64" 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 "LPU64"\n", + cs->cs_fp, cs->cs_startrec); + + OBD_ALLOC(cs->cs_buf, CR_MAXSIZE); + if (cs->cs_buf == NULL) + GOTO(out, rc = -ENOMEM); + + /* Set up the remote catalog handle */ + ctxt = llog_get_context(cs->cs_obd, LLOG_CHANGELOG_REPL_CTXT); + if (ctxt == NULL) + GOTO(out, rc = -ENOENT); + 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); + } + rc = llog_init_handle(NULL, llh, LLOG_F_IS_CAT, NULL); + if (rc) { + CERROR("llog_init_handle failed %d\n", rc); + GOTO(out, rc); + } + + rc = llog_cat_process(NULL, llh, changelog_kkuc_cb, cs, 0, 0); + + /* Send EOF no matter what our result */ + if ((kuch = changelog_kuc_hdr(cs->cs_buf, sizeof(*kuch), + cs->cs_flags))) { + 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, CR_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; + ENTRY; + + 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; + ENTRY; + + 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; + ENTRY; + + 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))) { + *oqctl = *oqc; + } 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; + ENTRY; + + 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, rc); + EXIT; + +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; + struct llog_ctxt *ctxt; + int rc; + ENTRY; + + 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, rc); + 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, rc); + } + case OBD_IOC_FID2PATH: + rc = mdc_ioc_fid2path(exp, karg); + GOTO(out, rc); + case LL_IOC_HSM_CT_START: + rc = mdc_ioc_hsm_ct_start(exp, karg); + GOTO(out, rc); + case LL_IOC_HSM_PROGRESS: + rc = mdc_ioc_hsm_progress(exp, karg); + GOTO(out, rc); + case LL_IOC_HSM_STATE_GET: + rc = mdc_ioc_hsm_state_get(exp, karg); + GOTO(out, rc); + case LL_IOC_HSM_STATE_SET: + rc = mdc_ioc_hsm_state_set(exp, karg); + case LL_IOC_HSM_ACTION: + rc = mdc_ioc_hsm_current_action(exp, karg); + GOTO(out, rc); + case LL_IOC_HSM_REQUEST: + rc = mdc_ioc_hsm_request(exp, karg); + GOTO(out, rc); + case OBD_IOC_CLIENT_RECOVER: + rc = ptlrpc_recover_import(imp, data->ioc_inlbuf1, 0); + if (rc < 0) + GOTO(out, rc); + GOTO(out, rc = 0); + case IOC_OSC_SET_ACTIVE: + rc = ptlrpc_set_import_active(imp, data->ioc_offset); + GOTO(out, rc); + case OBD_IOC_PARSE: { + ctxt = llog_get_context(exp->exp_obd, LLOG_CONFIG_REPL_CTXT); + rc = class_config_parse_llog(NULL, ctxt, data->ioc_inlbuf1, + NULL); + llog_ctxt_put(ctxt); + GOTO(out, rc); + } + case OBD_IOC_LLOG_INFO: + case OBD_IOC_LLOG_PRINT: { + ctxt = llog_get_context(obd, LLOG_CONFIG_REPL_CTXT); + rc = llog_ioctl(NULL, ctxt, cmd, data); + llog_ctxt_put(ctxt); + GOTO(out, rc); + } + case OBD_IOC_POLL_QUOTACHECK: + rc = mdc_quota_poll_check(exp, (struct if_quotacheck *)karg); + GOTO(out, rc); + case OBD_IOC_PING_TARGET: + rc = ptlrpc_obd_ping(obd); + GOTO(out, rc); + /* + * 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) + GOTO(out, rc = -ENODEV); + + /* copy UUID */ + if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(obd), + min((int) data->ioc_plen2, + (int) sizeof(struct obd_uuid)))) + GOTO(out, rc = -EFAULT); + + rc = mdc_statfs(NULL, obd->obd_self_export, &stat_buf, + cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS), + 0); + if (rc != 0) + GOTO(out, rc); + + if (copy_to_user(data->ioc_pbuf1, &stat_buf, + min((int) data->ioc_plen1, + (int) sizeof(stat_buf)))) + GOTO(out, rc = -EFAULT); + + GOTO(out, rc = 0); + } + case OBD_IOC_QUOTACTL: { + struct if_quotactl *qctl = karg; + struct obd_quotactl *oqctl; + + OBD_ALLOC_PTR(oqctl); + if (!oqctl) + RETURN(-ENOMEM); + + 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); + break; + } + case LL_IOC_GET_CONNECT_FLAGS: { + if (copy_to_user(uarg, + exp_connect_flags_ptr(exp), + sizeof(__u64))) + GOTO(out, rc = -EFAULT); + else + GOTO(out, rc = 0); + } + case LL_IOC_LOV_SWAP_LAYOUTS: { + rc = mdc_ioc_swap_layouts(exp, karg); + break; + } + default: + CERROR("mdc_ioctl(): unrecognised ioctl %#x\n", cmd); + GOTO(out, rc = -ENOTTY); + } +out: + module_put(THIS_MODULE); + + return rc; +} + +int mdc_get_info_rpc(struct obd_export *exp, + obd_count keylen, void *key, + int vallen, void *val) +{ + struct obd_import *imp = class_exp2cliimp(exp); + struct ptlrpc_request *req; + char *tmp; + int rc = -EINVAL; + ENTRY; + + 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++) { + lustre_swab_hai(hai); + hai = hai_next(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) { + rc = libcfs_kkuc_group_rem(lk->lk_uid, lk->lk_group); + /* Unregister with the coordinator */ + if (rc == 0) + rc = mdc_ioc_hsm_ct_unregister(imp); + } else { + struct file *fp = fget(lk->lk_wfd); + + rc = libcfs_kkuc_group_add(fp, lk->lk_uid, lk->lk_group, + lk->lk_data); + if (rc && fp) + fput(fp); + if (rc == 0) + 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; + ENTRY; + + 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); +} + +int mdc_set_info_async(const struct lu_env *env, + struct obd_export *exp, + obd_count keylen, void *key, + obd_count vallen, void *val, + struct ptlrpc_request_set *set) +{ + struct obd_import *imp = class_exp2cliimp(exp); + int rc; + ENTRY; + + 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_MDS_CONN)) { + /* mds-mds import */ + spin_lock(&imp->imp_lock); + imp->imp_server_timeout = 1; + spin_unlock(&imp->imp_lock); + imp->imp_client->cli_request_portal = MDS_MDS_PORTAL; + CDEBUG(D_OTHER, "%s: timeout / 2\n", exp->exp_obd->obd_name); + 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); +} + +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_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_pin(struct obd_export *exp, const struct lu_fid *fid, + struct obd_capa *oc, struct obd_client_handle *handle, + int flags) +{ + struct ptlrpc_request *req; + struct mdt_body *body; + int rc; + ENTRY; + + req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_PIN); + if (req == NULL) + RETURN(-ENOMEM); + + mdc_set_capa_size(req, &RMF_CAPA1, oc); + + rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_PIN); + if (rc) { + ptlrpc_request_free(req); + RETURN(rc); + } + + mdc_pack_body(req, fid, oc, 0, 0, -1, flags); + + ptlrpc_request_set_replen(req); + + mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL); + rc = ptlrpc_queue_wait(req); + mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL); + if (rc) { + CERROR("Pin failed: %d\n", rc); + GOTO(err_out, rc); + } + + body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY); + if (body == NULL) + GOTO(err_out, rc = -EPROTO); + + handle->och_fh = body->handle; + handle->och_magic = OBD_CLIENT_HANDLE_MAGIC; + + handle->och_mod = obd_mod_alloc(); + if (handle->och_mod == NULL) { + DEBUG_REQ(D_ERROR, req, "can't allocate md_open_data"); + GOTO(err_out, rc = -ENOMEM); + } + handle->och_mod->mod_open_req = req; /* will be dropped by unpin */ + + RETURN(0); + +err_out: + ptlrpc_req_finished(req); + RETURN(rc); +} + +static int mdc_unpin(struct obd_export *exp, struct obd_client_handle *handle, + int flag) +{ + struct ptlrpc_request *req; + struct mdt_body *body; + int rc; + ENTRY; + + req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp), &RQF_MDS_UNPIN, + LUSTRE_MDS_VERSION, MDS_UNPIN); + if (req == NULL) + RETURN(-ENOMEM); + + body = req_capsule_client_get(&req->rq_pill, &RMF_MDT_BODY); + body->handle = handle->och_fh; + body->flags = flag; + + ptlrpc_request_set_replen(req); + + mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL); + rc = ptlrpc_queue_wait(req); + mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL); + + if (rc != 0) + CERROR("Unpin failed: %d\n", rc); + + ptlrpc_req_finished(req); + ptlrpc_req_finished(handle->och_mod->mod_open_req); + + obd_mod_put(handle->och_mod); + RETURN(rc); +} + +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; + ENTRY; + + *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); + /* restore re-establish 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; + ENTRY; + RETURN(seq_client_alloc_fid(NULL, seq, fid)); +} + +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; +} + +struct ldlm_valblock_ops inode_lvbo = { + lvbo_free: mdc_resource_inode_free +}; + +static int mdc_setup(struct obd_device *obd, struct lustre_cfg *cfg) +{ + struct client_obd *cli = &obd->u.cli; + struct lprocfs_static_vars lvars = { 0 }; + int rc; + ENTRY; + + 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) + GOTO(err_rpc_lock, rc = -ENOMEM); + mdc_init_rpc_lock(cli->cl_close_lock); + + rc = client_obd_setup(obd, cfg); + if (rc) + GOTO(err_close_lock, rc); + 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 = obd_llog_init(obd, &obd->obd_olg, obd, NULL); + 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 the + * maximum-sized (= maximum striped) EA and cookie without having to + * calculate this (via a call into the LOV + OSCs) each time we make an RPC. */ +static int mdc_init_ea_size(struct obd_export *exp, int easize, + int def_easize, int cookiesize) +{ + struct obd_device *obd = exp->exp_obd; + struct client_obd *cli = &obd->u.cli; + ENTRY; + + 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; + + RETURN(0); +} + +static int mdc_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage) +{ + int rc = 0; + ENTRY; + + 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); + + rc = obd_llog_finish(obd, 0); + if (rc != 0) + CERROR("failed to cleanup llogging subsystems\n"); + break; + } + RETURN(rc); +} + +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_llog_init(struct obd_device *obd, struct obd_llog_group *olg, + struct obd_device *tgt, int *index) +{ + struct llog_ctxt *ctxt; + int rc; + + ENTRY; + + LASSERT(olg == &obd->obd_olg); + + rc = llog_setup(NULL, obd, olg, LLOG_CHANGELOG_REPL_CTXT, tgt, + &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 int mdc_llog_finish(struct obd_device *obd, int count) +{ + struct llog_ctxt *ctxt; + + ENTRY; + + ctxt = llog_get_context(obd, LLOG_CHANGELOG_REPL_CTXT); + if (ctxt) + llog_cleanup(NULL, ctxt); + + RETURN(0); +} + +static int mdc_process_config(struct obd_device *obd, obd_count len, void *buf) +{ + struct lustre_cfg *lcfg = buf; + struct lprocfs_static_vars lvars = { 0 }; + 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 */ +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; + ENTRY; + + 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; + ENTRY; + + if (status) + GOTO(out, capa = ERR_PTR(status)); + + body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY); + if (body == NULL) + GOTO(out, capa = ERR_PTR(-EFAULT)); + + if ((body->valid & OBD_MD_FLOSSCAPA) == 0) + GOTO(out, capa = ERR_PTR(-ENOENT)); + + capa = req_capsule_server_get(&req->rq_pill, &RMF_CAPA2); + if (!capa) + GOTO(out, capa = ERR_PTR(-EFAULT)); + EXIT; +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; + ENTRY; + + 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 int mdc_connect(const struct lu_env *env, + struct obd_export **exp, + struct obd_device *obd, struct obd_uuid *cluuid, + struct obd_connect_data *data, + void *localdata) +{ + struct obd_import *imp = obd->u.cli.cl_import; + + /* mds-mds import features */ + if (data && (data->ocd_connect_flags & OBD_CONNECT_MDS_MDS)) { + spin_lock(&imp->imp_lock); + imp->imp_server_timeout = 1; + spin_unlock(&imp->imp_lock); + imp->imp_client->cli_request_portal = MDS_MDS_PORTAL; + CDEBUG(D_OTHER, "%s: Set 'mds' portal and timeout\n", + obd->obd_name); + } + + return client_connect_import(env, exp, obd, cluuid, data, NULL); +} + +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 = mdc_connect, + .o_disconnect = client_disconnect_export, + .o_iocontrol = mdc_iocontrol, + .o_set_info_async = mdc_set_info_async, + .o_statfs = mdc_statfs, + .o_pin = mdc_pin, + .o_unpin = mdc_unpin, + .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_llog_init = mdc_llog_init, + .o_llog_finish = mdc_llog_finish, + .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 +}; + +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 +}; + +int __init mdc_init(void) +{ + int rc; + struct lprocfs_static_vars lvars = { 0 }; + lprocfs_mdc_init_vars(&lvars); + + rc = class_register_type(&mdc_obd_ops, &mdc_md_ops, lvars.module_vars, + LUSTRE_MDC_NAME, NULL); + RETURN(rc); +} + +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); |