diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/fid/fid_handler.c')
-rw-r--r-- | drivers/staging/lustre/lustre/fid/fid_handler.c | 661 |
1 files changed, 0 insertions, 661 deletions
diff --git a/drivers/staging/lustre/lustre/fid/fid_handler.c b/drivers/staging/lustre/lustre/fid/fid_handler.c deleted file mode 100644 index bbbb3cfe57b3..000000000000 --- a/drivers/staging/lustre/lustre/fid/fid_handler.c +++ /dev/null @@ -1,661 +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, 2012, Intel Corporation. - */ -/* - * This file is part of Lustre, http://www.lustre.org/ - * Lustre is a trademark of Sun Microsystems, Inc. - * - * lustre/fid/fid_handler.c - * - * Lustre Sequence Manager - * - * Author: Yury Umanets <umka@clusterfs.com> - */ - -#define DEBUG_SUBSYSTEM S_FID - -# include <linux/libcfs/libcfs.h> -# include <linux/module.h> - -#include <obd.h> -#include <obd_class.h> -#include <dt_object.h> -#include <md_object.h> -#include <obd_support.h> -#include <lustre_req_layout.h> -#include <lustre_fid.h> -#include "fid_internal.h" - -int client_fid_init(struct obd_device *obd, - struct obd_export *exp, enum lu_cli_type type) -{ - struct client_obd *cli = &obd->u.cli; - char *prefix; - int rc; - ENTRY; - - OBD_ALLOC_PTR(cli->cl_seq); - if (cli->cl_seq == NULL) - RETURN(-ENOMEM); - - OBD_ALLOC(prefix, MAX_OBD_NAME + 5); - if (prefix == NULL) - GOTO(out_free_seq, rc = -ENOMEM); - - snprintf(prefix, MAX_OBD_NAME + 5, "cli-%s", obd->obd_name); - - /* Init client side sequence-manager */ - rc = seq_client_init(cli->cl_seq, exp, type, prefix, NULL); - OBD_FREE(prefix, MAX_OBD_NAME + 5); - if (rc) - GOTO(out_free_seq, rc); - - RETURN(rc); -out_free_seq: - OBD_FREE_PTR(cli->cl_seq); - cli->cl_seq = NULL; - return rc; -} -EXPORT_SYMBOL(client_fid_init); - -int client_fid_fini(struct obd_device *obd) -{ - struct client_obd *cli = &obd->u.cli; - ENTRY; - - if (cli->cl_seq != NULL) { - seq_client_fini(cli->cl_seq); - OBD_FREE_PTR(cli->cl_seq); - cli->cl_seq = NULL; - } - - RETURN(0); -} -EXPORT_SYMBOL(client_fid_fini); - -static void seq_server_proc_fini(struct lu_server_seq *seq); - -/* Assigns client to sequence controller node. */ -int seq_server_set_cli(struct lu_server_seq *seq, - struct lu_client_seq *cli, - const struct lu_env *env) -{ - int rc = 0; - ENTRY; - - /* - * Ask client for new range, assign that range to ->seq_space and write - * seq state to backing store should be atomic. - */ - mutex_lock(&seq->lss_mutex); - - if (cli == NULL) { - CDEBUG(D_INFO, "%s: Detached sequence client %s\n", - seq->lss_name, cli->lcs_name); - seq->lss_cli = cli; - GOTO(out_up, rc = 0); - } - - if (seq->lss_cli != NULL) { - CDEBUG(D_HA, "%s: Sequence controller is already " - "assigned\n", seq->lss_name); - GOTO(out_up, rc = -EEXIST); - } - - CDEBUG(D_INFO, "%s: Attached sequence controller %s\n", - seq->lss_name, cli->lcs_name); - - seq->lss_cli = cli; - cli->lcs_space.lsr_index = seq->lss_site->ss_node_id; - EXIT; -out_up: - mutex_unlock(&seq->lss_mutex); - return rc; -} -EXPORT_SYMBOL(seq_server_set_cli); -/* - * allocate \a w units of sequence from range \a from. - */ -static inline void range_alloc(struct lu_seq_range *to, - struct lu_seq_range *from, - __u64 width) -{ - width = min(range_space(from), width); - to->lsr_start = from->lsr_start; - to->lsr_end = from->lsr_start + width; - from->lsr_start += width; -} - -/** - * On controller node, allocate new super sequence for regular sequence server. - * As this super sequence controller, this node suppose to maintain fld - * and update index. - * \a out range always has currect mds node number of requester. - */ - -static int __seq_server_alloc_super(struct lu_server_seq *seq, - struct lu_seq_range *out, - const struct lu_env *env) -{ - struct lu_seq_range *space = &seq->lss_space; - int rc; - ENTRY; - - LASSERT(range_is_sane(space)); - - if (range_is_exhausted(space)) { - CERROR("%s: Sequences space is exhausted\n", - seq->lss_name); - RETURN(-ENOSPC); - } else { - range_alloc(out, space, seq->lss_width); - } - - rc = seq_store_update(env, seq, out, 1 /* sync */); - - LCONSOLE_INFO("%s: super-sequence allocation rc = %d " DRANGE"\n", - seq->lss_name, rc, PRANGE(out)); - - RETURN(rc); -} - -int seq_server_alloc_super(struct lu_server_seq *seq, - struct lu_seq_range *out, - const struct lu_env *env) -{ - int rc; - ENTRY; - - mutex_lock(&seq->lss_mutex); - rc = __seq_server_alloc_super(seq, out, env); - mutex_unlock(&seq->lss_mutex); - - RETURN(rc); -} - -static int __seq_set_init(const struct lu_env *env, - struct lu_server_seq *seq) -{ - struct lu_seq_range *space = &seq->lss_space; - int rc; - - range_alloc(&seq->lss_lowater_set, space, seq->lss_set_width); - range_alloc(&seq->lss_hiwater_set, space, seq->lss_set_width); - - rc = seq_store_update(env, seq, NULL, 1); - - return rc; -} - -/* - * This function implements new seq allocation algorithm using async - * updates to seq file on disk. ref bug 18857 for details. - * there are four variable to keep track of this process - * - * lss_space; - available lss_space - * lss_lowater_set; - lu_seq_range for all seqs before barrier, i.e. safe to use - * lss_hiwater_set; - lu_seq_range after barrier, i.e. allocated but may be - * not yet committed - * - * when lss_lowater_set reaches the end it is replaced with hiwater one and - * a write operation is initiated to allocate new hiwater range. - * if last seq write opearion is still not commited, current operation is - * flaged as sync write op. - */ -static int range_alloc_set(const struct lu_env *env, - struct lu_seq_range *out, - struct lu_server_seq *seq) -{ - struct lu_seq_range *space = &seq->lss_space; - struct lu_seq_range *loset = &seq->lss_lowater_set; - struct lu_seq_range *hiset = &seq->lss_hiwater_set; - int rc = 0; - - if (range_is_zero(loset)) - __seq_set_init(env, seq); - - if (OBD_FAIL_CHECK(OBD_FAIL_SEQ_ALLOC)) /* exhaust set */ - loset->lsr_start = loset->lsr_end; - - if (range_is_exhausted(loset)) { - /* reached high water mark. */ - struct lu_device *dev = seq->lss_site->ss_lu->ls_top_dev; - int obd_num_clients = dev->ld_obd->obd_num_exports; - __u64 set_sz; - - /* calculate new seq width based on number of clients */ - set_sz = max(seq->lss_set_width, - obd_num_clients * seq->lss_width); - set_sz = min(range_space(space), set_sz); - - /* Switch to hiwater range now */ - *loset = *hiset; - /* allocate new hiwater range */ - range_alloc(hiset, space, set_sz); - - /* update ondisk seq with new *space */ - rc = seq_store_update(env, seq, NULL, seq->lss_need_sync); - } - - LASSERTF(!range_is_exhausted(loset) || range_is_sane(loset), - DRANGE"\n", PRANGE(loset)); - - if (rc == 0) - range_alloc(out, loset, seq->lss_width); - - RETURN(rc); -} - -static int __seq_server_alloc_meta(struct lu_server_seq *seq, - struct lu_seq_range *out, - const struct lu_env *env) -{ - struct lu_seq_range *space = &seq->lss_space; - int rc = 0; - - ENTRY; - - LASSERT(range_is_sane(space)); - - /* Check if available space ends and allocate new super seq */ - if (range_is_exhausted(space)) { - if (!seq->lss_cli) { - CERROR("%s: No sequence controller is attached.\n", - seq->lss_name); - RETURN(-ENODEV); - } - - rc = seq_client_alloc_super(seq->lss_cli, env); - if (rc) { - CERROR("%s: Can't allocate super-sequence, rc %d\n", - seq->lss_name, rc); - RETURN(rc); - } - - /* Saving new range to allocation space. */ - *space = seq->lss_cli->lcs_space; - LASSERT(range_is_sane(space)); - } - - rc = range_alloc_set(env, out, seq); - if (rc != 0) { - CERROR("%s: Allocated meta-sequence failed: rc = %d\n", - seq->lss_name, rc); - RETURN(rc); - } - - CDEBUG(D_INFO, "%s: Allocated meta-sequence " DRANGE"\n", - seq->lss_name, PRANGE(out)); - - RETURN(rc); -} - -int seq_server_alloc_meta(struct lu_server_seq *seq, - struct lu_seq_range *out, - const struct lu_env *env) -{ - int rc; - ENTRY; - - mutex_lock(&seq->lss_mutex); - rc = __seq_server_alloc_meta(seq, out, env); - mutex_unlock(&seq->lss_mutex); - - RETURN(rc); -} -EXPORT_SYMBOL(seq_server_alloc_meta); - -static int seq_server_handle(struct lu_site *site, - const struct lu_env *env, - __u32 opc, struct lu_seq_range *out) -{ - int rc; - struct seq_server_site *ss_site; - ENTRY; - - ss_site = lu_site2seq(site); - - switch (opc) { - case SEQ_ALLOC_META: - if (!ss_site->ss_server_seq) { - CERROR("Sequence server is not " - "initialized\n"); - RETURN(-EINVAL); - } - rc = seq_server_alloc_meta(ss_site->ss_server_seq, out, env); - break; - case SEQ_ALLOC_SUPER: - if (!ss_site->ss_control_seq) { - CERROR("Sequence controller is not " - "initialized\n"); - RETURN(-EINVAL); - } - rc = seq_server_alloc_super(ss_site->ss_control_seq, out, env); - break; - default: - rc = -EINVAL; - break; - } - - RETURN(rc); -} - -static int seq_req_handle(struct ptlrpc_request *req, - const struct lu_env *env, - struct seq_thread_info *info) -{ - struct lu_seq_range *out, *tmp; - struct lu_site *site; - int rc = -EPROTO; - __u32 *opc; - ENTRY; - - LASSERT(!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)); - site = req->rq_export->exp_obd->obd_lu_dev->ld_site; - LASSERT(site != NULL); - - rc = req_capsule_server_pack(info->sti_pill); - if (rc) - RETURN(err_serious(rc)); - - opc = req_capsule_client_get(info->sti_pill, &RMF_SEQ_OPC); - if (opc != NULL) { - out = req_capsule_server_get(info->sti_pill, &RMF_SEQ_RANGE); - if (out == NULL) - RETURN(err_serious(-EPROTO)); - - tmp = req_capsule_client_get(info->sti_pill, &RMF_SEQ_RANGE); - - /* seq client passed mdt id, we need to pass that using out - * range parameter */ - - out->lsr_index = tmp->lsr_index; - out->lsr_flags = tmp->lsr_flags; - rc = seq_server_handle(site, env, *opc, out); - } else - rc = err_serious(-EPROTO); - - RETURN(rc); -} - -/* context key constructor/destructor: seq_key_init, seq_key_fini */ -LU_KEY_INIT_FINI(seq, struct seq_thread_info); - -/* context key: seq_thread_key */ -LU_CONTEXT_KEY_DEFINE(seq, LCT_MD_THREAD | LCT_DT_THREAD); - -static void seq_thread_info_init(struct ptlrpc_request *req, - struct seq_thread_info *info) -{ - info->sti_pill = &req->rq_pill; - /* Init request capsule */ - req_capsule_init(info->sti_pill, req, RCL_SERVER); - req_capsule_set(info->sti_pill, &RQF_SEQ_QUERY); -} - -static void seq_thread_info_fini(struct seq_thread_info *info) -{ - req_capsule_fini(info->sti_pill); -} - -int seq_handle(struct ptlrpc_request *req) -{ - const struct lu_env *env; - struct seq_thread_info *info; - int rc; - - env = req->rq_svc_thread->t_env; - LASSERT(env != NULL); - - info = lu_context_key_get(&env->le_ctx, &seq_thread_key); - LASSERT(info != NULL); - - seq_thread_info_init(req, info); - rc = seq_req_handle(req, env, info); - /* XXX: we don't need replay but MDT assign transno in any case, - * remove it manually before reply*/ - lustre_msg_set_transno(req->rq_repmsg, 0); - seq_thread_info_fini(info); - - return rc; -} -EXPORT_SYMBOL(seq_handle); - -/* - * Entry point for handling FLD RPCs called from MDT. - */ -int seq_query(struct com_thread_info *info) -{ - return seq_handle(info->cti_pill->rc_req); -} -EXPORT_SYMBOL(seq_query); - - -#ifdef LPROCFS -static int seq_server_proc_init(struct lu_server_seq *seq) -{ - int rc; - ENTRY; - - seq->lss_proc_dir = lprocfs_register(seq->lss_name, - seq_type_proc_dir, - NULL, NULL); - if (IS_ERR(seq->lss_proc_dir)) { - rc = PTR_ERR(seq->lss_proc_dir); - RETURN(rc); - } - - rc = lprocfs_add_vars(seq->lss_proc_dir, - seq_server_proc_list, seq); - if (rc) { - CERROR("%s: Can't init sequence manager " - "proc, rc %d\n", seq->lss_name, rc); - GOTO(out_cleanup, rc); - } - - RETURN(0); - -out_cleanup: - seq_server_proc_fini(seq); - return rc; -} - -static void seq_server_proc_fini(struct lu_server_seq *seq) -{ - ENTRY; - if (seq->lss_proc_dir != NULL) { - if (!IS_ERR(seq->lss_proc_dir)) - lprocfs_remove(&seq->lss_proc_dir); - seq->lss_proc_dir = NULL; - } - EXIT; -} -#else -static int seq_server_proc_init(struct lu_server_seq *seq) -{ - return 0; -} - -static void seq_server_proc_fini(struct lu_server_seq *seq) -{ - return; -} -#endif - - -int seq_server_init(struct lu_server_seq *seq, - struct dt_device *dev, - const char *prefix, - enum lu_mgr_type type, - struct seq_server_site *ss, - const struct lu_env *env) -{ - int rc, is_srv = (type == LUSTRE_SEQ_SERVER); - ENTRY; - - LASSERT(dev != NULL); - LASSERT(prefix != NULL); - LASSERT(ss != NULL); - LASSERT(ss->ss_lu != NULL); - - seq->lss_cli = NULL; - seq->lss_type = type; - seq->lss_site = ss; - range_init(&seq->lss_space); - - range_init(&seq->lss_lowater_set); - range_init(&seq->lss_hiwater_set); - seq->lss_set_width = LUSTRE_SEQ_BATCH_WIDTH; - - mutex_init(&seq->lss_mutex); - - seq->lss_width = is_srv ? - LUSTRE_SEQ_META_WIDTH : LUSTRE_SEQ_SUPER_WIDTH; - - snprintf(seq->lss_name, sizeof(seq->lss_name), - "%s-%s", (is_srv ? "srv" : "ctl"), prefix); - - rc = seq_store_init(seq, env, dev); - if (rc) - GOTO(out, rc); - /* Request backing store for saved sequence info. */ - rc = seq_store_read(seq, env); - if (rc == -ENODATA) { - - /* Nothing is read, init by default value. */ - seq->lss_space = is_srv ? - LUSTRE_SEQ_ZERO_RANGE: - LUSTRE_SEQ_SPACE_RANGE; - - LASSERT(ss != NULL); - seq->lss_space.lsr_index = ss->ss_node_id; - LCONSOLE_INFO("%s: No data found " - "on store. Initialize space\n", - seq->lss_name); - - rc = seq_store_update(env, seq, NULL, 0); - if (rc) { - CERROR("%s: Can't write space data, " - "rc %d\n", seq->lss_name, rc); - } - } else if (rc) { - CERROR("%s: Can't read space data, rc %d\n", - seq->lss_name, rc); - GOTO(out, rc); - } - - if (is_srv) { - LASSERT(range_is_sane(&seq->lss_space)); - } else { - LASSERT(!range_is_zero(&seq->lss_space) && - range_is_sane(&seq->lss_space)); - } - - rc = seq_server_proc_init(seq); - if (rc) - GOTO(out, rc); - - EXIT; -out: - if (rc) - seq_server_fini(seq, env); - return rc; -} -EXPORT_SYMBOL(seq_server_init); - -void seq_server_fini(struct lu_server_seq *seq, - const struct lu_env *env) -{ - ENTRY; - - seq_server_proc_fini(seq); - seq_store_fini(seq, env); - - EXIT; -} -EXPORT_SYMBOL(seq_server_fini); - -int seq_site_fini(const struct lu_env *env, struct seq_server_site *ss) -{ - if (ss == NULL) - RETURN(0); - - if (ss->ss_server_seq) { - seq_server_fini(ss->ss_server_seq, env); - OBD_FREE_PTR(ss->ss_server_seq); - ss->ss_server_seq = NULL; - } - - if (ss->ss_control_seq) { - seq_server_fini(ss->ss_control_seq, env); - OBD_FREE_PTR(ss->ss_control_seq); - ss->ss_control_seq = NULL; - } - - if (ss->ss_client_seq) { - seq_client_fini(ss->ss_client_seq); - OBD_FREE_PTR(ss->ss_client_seq); - ss->ss_client_seq = NULL; - } - - RETURN(0); -} -EXPORT_SYMBOL(seq_site_fini); - -proc_dir_entry_t *seq_type_proc_dir = NULL; - -static int __init fid_mod_init(void) -{ - seq_type_proc_dir = lprocfs_register(LUSTRE_SEQ_NAME, - proc_lustre_root, - NULL, NULL); - if (IS_ERR(seq_type_proc_dir)) - return PTR_ERR(seq_type_proc_dir); - - LU_CONTEXT_KEY_INIT(&seq_thread_key); - lu_context_key_register(&seq_thread_key); - return 0; -} - -static void __exit fid_mod_exit(void) -{ - lu_context_key_degister(&seq_thread_key); - if (seq_type_proc_dir != NULL && !IS_ERR(seq_type_proc_dir)) { - lprocfs_remove(&seq_type_proc_dir); - seq_type_proc_dir = NULL; - } -} - -MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>"); -MODULE_DESCRIPTION("Lustre FID Module"); -MODULE_LICENSE("GPL"); - -cfs_module(fid, "0.1.0", fid_mod_init, fid_mod_exit); |