diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/fld/fld_handler.c')
-rw-r--r-- | drivers/staging/lustre/lustre/fld/fld_handler.c | 447 |
1 files changed, 0 insertions, 447 deletions
diff --git a/drivers/staging/lustre/lustre/fld/fld_handler.c b/drivers/staging/lustre/lustre/fld/fld_handler.c deleted file mode 100644 index d2707ae4ad57..000000000000 --- a/drivers/staging/lustre/lustre/fld/fld_handler.c +++ /dev/null @@ -1,447 +0,0 @@ -/* - * 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) 2007, 2010, Oracle and/or its affiliates. All rights reserved. - * Use is subject to license terms. - * - * Copyright (c) 2011, 2013, Intel Corporation. - */ -/* - * This file is part of Lustre, http://www.lustre.org/ - * Lustre is a trademark of Sun Microsystems, Inc. - * - * lustre/fld/fld_handler.c - * - * FLD (Fids Location Database) - * - * Author: Yury Umanets <umka@clusterfs.com> - * Author: WangDi <wangdi@clusterfs.com> - * Author: Pravin Shelar <pravin.shelar@sun.com> - */ - -#define DEBUG_SUBSYSTEM S_FLD - -# include <linux/libcfs/libcfs.h> -# include <linux/module.h> -# include <linux/jbd.h> -# include <asm/div64.h> - -#include <obd.h> -#include <obd_class.h> -#include <lustre_ver.h> -#include <obd_support.h> -#include <lprocfs_status.h> - -#include <md_object.h> -#include <lustre_fid.h> -#include <lustre_req_layout.h> -#include "fld_internal.h" -#include <lustre_fid.h> - - -/* context key constructor/destructor: fld_key_init, fld_key_fini */ -LU_KEY_INIT_FINI(fld, struct fld_thread_info); - -/* context key: fld_thread_key */ -LU_CONTEXT_KEY_DEFINE(fld, LCT_MD_THREAD | LCT_DT_THREAD | LCT_MG_THREAD); - -proc_dir_entry_t *fld_type_proc_dir = NULL; - -static int __init fld_mod_init(void) -{ - fld_type_proc_dir = lprocfs_register(LUSTRE_FLD_NAME, - proc_lustre_root, - NULL, NULL); - if (IS_ERR(fld_type_proc_dir)) - return PTR_ERR(fld_type_proc_dir); - - LU_CONTEXT_KEY_INIT(&fld_thread_key); - lu_context_key_register(&fld_thread_key); - return 0; -} - -static void __exit fld_mod_exit(void) -{ - lu_context_key_degister(&fld_thread_key); - if (fld_type_proc_dir != NULL && !IS_ERR(fld_type_proc_dir)) { - lprocfs_remove(&fld_type_proc_dir); - fld_type_proc_dir = NULL; - } -} - -int fld_declare_server_create(const struct lu_env *env, - struct lu_server_fld *fld, - struct lu_seq_range *range, - struct thandle *th) -{ - int rc; - - rc = fld_declare_index_create(env, fld, range, th); - RETURN(rc); -} -EXPORT_SYMBOL(fld_declare_server_create); - -/** - * Insert FLD index entry and update FLD cache. - * - * This function is called from the sequence allocator when a super-sequence - * is granted to a server. - */ -int fld_server_create(const struct lu_env *env, struct lu_server_fld *fld, - struct lu_seq_range *range, struct thandle *th) -{ - int rc; - - mutex_lock(&fld->lsf_lock); - rc = fld_index_create(env, fld, range, th); - mutex_unlock(&fld->lsf_lock); - - RETURN(rc); -} -EXPORT_SYMBOL(fld_server_create); - -/** - * Lookup mds by seq, returns a range for given seq. - * - * If that entry is not cached in fld cache, request is sent to super - * sequence controller node (MDT0). All other MDT[1...N] and client - * cache fld entries, but this cache is not persistent. - */ -int fld_server_lookup(const struct lu_env *env, struct lu_server_fld *fld, - seqno_t seq, struct lu_seq_range *range) -{ - struct lu_seq_range *erange; - struct fld_thread_info *info; - int rc; - ENTRY; - - info = lu_context_key_get(&env->le_ctx, &fld_thread_key); - LASSERT(info != NULL); - erange = &info->fti_lrange; - - /* Lookup it in the cache. */ - rc = fld_cache_lookup(fld->lsf_cache, seq, erange); - if (rc == 0) { - if (unlikely(fld_range_type(erange) != fld_range_type(range) && - !fld_range_is_any(range))) { - CERROR("%s: FLD cache range "DRANGE" does not match" - "requested flag %x: rc = %d\n", fld->lsf_name, - PRANGE(erange), range->lsr_flags, -EIO); - RETURN(-EIO); - } - *range = *erange; - RETURN(0); - } - - if (fld->lsf_obj) { - /* On server side, all entries should be in cache. - * If we can not find it in cache, just return error */ - CERROR("%s: Cannot find sequence "LPX64": rc = %d\n", - fld->lsf_name, seq, -EIO); - RETURN(-EIO); - } else { - LASSERT(fld->lsf_control_exp); - /* send request to mdt0 i.e. super seq. controller. - * This is temporary solution, long term solution is fld - * replication on all mdt servers. - */ - range->lsr_start = seq; - rc = fld_client_rpc(fld->lsf_control_exp, - range, FLD_LOOKUP); - if (rc == 0) - fld_cache_insert(fld->lsf_cache, range); - } - RETURN(rc); -} -EXPORT_SYMBOL(fld_server_lookup); - -/** - * All MDT server handle fld lookup operation. But only MDT0 has fld index. - * if entry is not found in cache we need to forward lookup request to MDT0 - */ - -static int fld_server_handle(struct lu_server_fld *fld, - const struct lu_env *env, - __u32 opc, struct lu_seq_range *range, - struct fld_thread_info *info) -{ - int rc; - ENTRY; - - switch (opc) { - case FLD_LOOKUP: - rc = fld_server_lookup(env, fld, range->lsr_start, range); - break; - default: - rc = -EINVAL; - break; - } - - CDEBUG(D_INFO, "%s: FLD req handle: error %d (opc: %d, range: " - DRANGE"\n", fld->lsf_name, rc, opc, PRANGE(range)); - - RETURN(rc); - -} - -static int fld_req_handle(struct ptlrpc_request *req, - struct fld_thread_info *info) -{ - struct obd_export *exp = req->rq_export; - struct lu_site *site = exp->exp_obd->obd_lu_dev->ld_site; - struct lu_seq_range *in; - struct lu_seq_range *out; - int rc; - __u32 *opc; - ENTRY; - - rc = req_capsule_server_pack(info->fti_pill); - if (rc) - RETURN(err_serious(rc)); - - opc = req_capsule_client_get(info->fti_pill, &RMF_FLD_OPC); - if (opc != NULL) { - in = req_capsule_client_get(info->fti_pill, &RMF_FLD_MDFLD); - if (in == NULL) - RETURN(err_serious(-EPROTO)); - out = req_capsule_server_get(info->fti_pill, &RMF_FLD_MDFLD); - if (out == NULL) - RETURN(err_serious(-EPROTO)); - *out = *in; - - /* For old 2.0 client, the 'lsr_flags' is uninitialized. - * Set it as 'LU_SEQ_RANGE_MDT' by default. */ - if (!(exp_connect_flags(exp) & OBD_CONNECT_64BITHASH) && - !(exp_connect_flags(exp) & OBD_CONNECT_MDS_MDS) && - !(exp_connect_flags(exp) & OBD_CONNECT_LIGHTWEIGHT) && - !exp->exp_libclient) - fld_range_set_mdt(out); - - rc = fld_server_handle(lu_site2seq(site)->ss_server_fld, - req->rq_svc_thread->t_env, - *opc, out, info); - } else { - rc = err_serious(-EPROTO); - } - - RETURN(rc); -} - -static void fld_thread_info_init(struct ptlrpc_request *req, - struct fld_thread_info *info) -{ - info->fti_pill = &req->rq_pill; - /* Init request capsule. */ - req_capsule_init(info->fti_pill, req, RCL_SERVER); - req_capsule_set(info->fti_pill, &RQF_FLD_QUERY); -} - -static void fld_thread_info_fini(struct fld_thread_info *info) -{ - req_capsule_fini(info->fti_pill); -} - -static int fld_handle(struct ptlrpc_request *req) -{ - struct fld_thread_info *info; - const struct lu_env *env; - int rc; - - env = req->rq_svc_thread->t_env; - LASSERT(env != NULL); - - info = lu_context_key_get(&env->le_ctx, &fld_thread_key); - LASSERT(info != NULL); - - fld_thread_info_init(req, info); - rc = fld_req_handle(req, info); - fld_thread_info_fini(info); - - return rc; -} - -/* - * Entry point for handling FLD RPCs called from MDT. - */ -int fld_query(struct com_thread_info *info) -{ - return fld_handle(info->cti_pill->rc_req); -} -EXPORT_SYMBOL(fld_query); - -/* - * Returns true, if fid is local to this server node. - * - * WARNING: this function is *not* guaranteed to return false if fid is - * remote: it makes an educated conservative guess only. - * - * fid_is_local() is supposed to be used in assertion checks only. - */ -int fid_is_local(const struct lu_env *env, - struct lu_site *site, const struct lu_fid *fid) -{ - int result; - struct seq_server_site *ss_site; - struct lu_seq_range *range; - struct fld_thread_info *info; - ENTRY; - - info = lu_context_key_get(&env->le_ctx, &fld_thread_key); - range = &info->fti_lrange; - - result = 1; /* conservatively assume fid is local */ - ss_site = lu_site2seq(site); - if (ss_site->ss_client_fld != NULL) { - int rc; - - rc = fld_cache_lookup(ss_site->ss_client_fld->lcf_cache, - fid_seq(fid), range); - if (rc == 0) - result = (range->lsr_index == ss_site->ss_node_id); - } - return result; -} -EXPORT_SYMBOL(fid_is_local); - -static void fld_server_proc_fini(struct lu_server_fld *fld); - -#ifdef LPROCFS -static int fld_server_proc_init(struct lu_server_fld *fld) -{ - int rc = 0; - ENTRY; - - fld->lsf_proc_dir = lprocfs_register(fld->lsf_name, - fld_type_proc_dir, - fld_server_proc_list, fld); - if (IS_ERR(fld->lsf_proc_dir)) { - rc = PTR_ERR(fld->lsf_proc_dir); - RETURN(rc); - } - - rc = lprocfs_seq_create(fld->lsf_proc_dir, "fldb", 0444, - &fld_proc_seq_fops, fld); - if (rc) { - lprocfs_remove(&fld->lsf_proc_dir); - fld->lsf_proc_dir = NULL; - } - - RETURN(rc); -} - -static void fld_server_proc_fini(struct lu_server_fld *fld) -{ - ENTRY; - if (fld->lsf_proc_dir != NULL) { - if (!IS_ERR(fld->lsf_proc_dir)) - lprocfs_remove(&fld->lsf_proc_dir); - fld->lsf_proc_dir = NULL; - } - EXIT; -} -#else -static int fld_server_proc_init(struct lu_server_fld *fld) -{ - return 0; -} - -static void fld_server_proc_fini(struct lu_server_fld *fld) -{ - return; -} -#endif - -int fld_server_init(const struct lu_env *env, struct lu_server_fld *fld, - struct dt_device *dt, const char *prefix, int mds_node_id, - int type) -{ - int cache_size, cache_threshold; - int rc; - ENTRY; - - snprintf(fld->lsf_name, sizeof(fld->lsf_name), - "srv-%s", prefix); - - cache_size = FLD_SERVER_CACHE_SIZE / - sizeof(struct fld_cache_entry); - - cache_threshold = cache_size * - FLD_SERVER_CACHE_THRESHOLD / 100; - - mutex_init(&fld->lsf_lock); - fld->lsf_cache = fld_cache_init(fld->lsf_name, - cache_size, cache_threshold); - if (IS_ERR(fld->lsf_cache)) { - rc = PTR_ERR(fld->lsf_cache); - fld->lsf_cache = NULL; - GOTO(out, rc); - } - - if (!mds_node_id && type == LU_SEQ_RANGE_MDT) { - rc = fld_index_init(env, fld, dt); - if (rc) - GOTO(out, rc); - } else { - fld->lsf_obj = NULL; - } - - rc = fld_server_proc_init(fld); - if (rc) - GOTO(out, rc); - - fld->lsf_control_exp = NULL; - - GOTO(out, rc); - -out: - if (rc) - fld_server_fini(env, fld); - return rc; -} -EXPORT_SYMBOL(fld_server_init); - -void fld_server_fini(const struct lu_env *env, struct lu_server_fld *fld) -{ - ENTRY; - - fld_server_proc_fini(fld); - fld_index_fini(env, fld); - - if (fld->lsf_cache != NULL) { - if (!IS_ERR(fld->lsf_cache)) - fld_cache_fini(fld->lsf_cache); - fld->lsf_cache = NULL; - } - - EXIT; -} -EXPORT_SYMBOL(fld_server_fini); - -MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>"); -MODULE_DESCRIPTION("Lustre FLD"); -MODULE_LICENSE("GPL"); - -cfs_module(mdd, "0.1.0", fld_mod_init, fld_mod_exit); |