+++ /dev/null
-/*
- * GPL HEADER START
- *
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 only,
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License version 2 for more details (a copy is included
- * in the LICENSE file that accompanied this code).
- *
- * You should have received a copy of the GNU General Public License
- * version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
- *
- * GPL HEADER END
- */
-/*
- * Copyright (c) 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);
* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2011, 2012, Intel Corporation.
+ * Copyright (c) 2011, 2013, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
#define DEBUG_SUBSYSTEM S_FID
-# include <linux/libcfs/libcfs.h>
-# include <linux/module.h>
+#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>
/* mdc RPC locks */
#include <lustre_mdc.h>
struct obd_export *exp = seq->lcs_exp;
struct ptlrpc_request *req;
struct lu_seq_range *out, *in;
- __u32 *op;
- unsigned int debug_mask;
- int rc;
+ __u32 *op;
+ unsigned int debug_mask;
+ int rc;
ENTRY;
req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp), &RQF_SEQ_QUERY,
mutex_lock(&seq->lcs_mutex);
if (seq->lcs_srv) {
- LASSERT(env != NULL);
- rc = seq_server_alloc_super(seq->lcs_srv, &seq->lcs_space,
- env);
+ rc = 0;
} else {
/* Check whether the connection to seq controller has been
* setup (lcs_exp != NULL) */
ENTRY;
if (seq->lcs_srv) {
- LASSERT(env != NULL);
- rc = seq_server_alloc_meta(seq->lcs_srv, &seq->lcs_space, env);
+ rc = 0;
} else {
do {
/* If meta server return -EINPROGRESS or EAGAIN,
SEQ_ALLOC_META, "meta");
} while (rc == -EINPROGRESS || rc == -EAGAIN);
}
+
RETURN(rc);
}
}
EXPORT_SYMBOL(seq_client_flush);
-static void seq_client_proc_fini(struct lu_client_seq *seq);
-
+static void seq_client_proc_fini(struct lu_client_seq *seq)
+{
#ifdef LPROCFS
+ ENTRY;
+ if (seq->lcs_proc_dir) {
+ if (!IS_ERR(seq->lcs_proc_dir))
+ lprocfs_remove(&seq->lcs_proc_dir);
+ seq->lcs_proc_dir = NULL;
+ }
+ EXIT;
+#endif /* LPROCFS */
+}
+
static int seq_client_proc_init(struct lu_client_seq *seq)
{
+#ifdef LPROCFS
int rc;
ENTRY;
out_cleanup:
seq_client_proc_fini(seq);
return rc;
-}
-static void seq_client_proc_fini(struct lu_client_seq *seq)
-{
- ENTRY;
- if (seq->lcs_proc_dir) {
- if (!IS_ERR(seq->lcs_proc_dir))
- lprocfs_remove(&seq->lcs_proc_dir);
- seq->lcs_proc_dir = NULL;
- }
- EXIT;
-}
-#else
-static int seq_client_proc_init(struct lu_client_seq *seq)
-{
+#else /* LPROCFS */
return 0;
-}
-
-static void seq_client_proc_fini(struct lu_client_seq *seq)
-{
- return;
-}
#endif
+}
int seq_client_init(struct lu_client_seq *seq,
struct obd_export *exp,
EXIT;
}
EXPORT_SYMBOL(seq_client_fini);
+
+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);
+
+struct proc_dir_entry *seq_type_proc_dir;
+
+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);
+ return 0;
+}
+
+static void __exit fid_mod_exit(void)
+{
+ 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);
+++ /dev/null
-/*
- * GPL HEADER START
- *
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 only,
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License version 2 for more details (a copy is included
- * in the LICENSE file that accompanied this code).
- *
- * You should have received a copy of the GNU General Public License
- * version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
- *
- * GPL HEADER END
- */
-/*
- * Copyright (c) 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/fid/fid_store.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"
-
-
-static struct lu_buf *seq_store_buf(struct seq_thread_info *info)
-{
- struct lu_buf *buf;
-
- buf = &info->sti_buf;
- buf->lb_buf = &info->sti_space;
- buf->lb_len = sizeof(info->sti_space);
- return buf;
-}
-
-struct seq_update_callback {
- struct dt_txn_commit_cb suc_cb;
- struct lu_server_seq *suc_seq;
-};
-
-void seq_update_cb(struct lu_env *env, struct thandle *th,
- struct dt_txn_commit_cb *cb, int err)
-{
- struct seq_update_callback *ccb;
-
- ccb = container_of0(cb, struct seq_update_callback, suc_cb);
-
- LASSERT(ccb->suc_seq != NULL);
-
- ccb->suc_seq->lss_need_sync = 0;
- OBD_FREE_PTR(ccb);
-}
-
-int seq_update_cb_add(struct thandle *th, struct lu_server_seq *seq)
-{
- struct seq_update_callback *ccb;
- struct dt_txn_commit_cb *dcb;
- int rc;
-
- OBD_ALLOC_PTR(ccb);
- if (ccb == NULL)
- return -ENOMEM;
-
- ccb->suc_seq = seq;
- seq->lss_need_sync = 1;
-
- dcb = &ccb->suc_cb;
- dcb->dcb_func = seq_update_cb;
- INIT_LIST_HEAD(&dcb->dcb_linkage);
- strncpy(dcb->dcb_name, "seq_update_cb", MAX_COMMIT_CB_STR_LEN);
- dcb->dcb_name[MAX_COMMIT_CB_STR_LEN - 1] = '\0';
-
- rc = dt_trans_cb_add(th, dcb);
- if (rc)
- OBD_FREE_PTR(ccb);
- return rc;
-}
-
-/* This function implies that caller takes care about locking. */
-int seq_store_update(const struct lu_env *env, struct lu_server_seq *seq,
- struct lu_seq_range *out, int sync)
-{
- struct dt_device *dt_dev = lu2dt_dev(seq->lss_obj->do_lu.lo_dev);
- struct seq_thread_info *info;
- struct thandle *th;
- loff_t pos = 0;
- int rc;
-
- info = lu_context_key_get(&env->le_ctx, &seq_thread_key);
- LASSERT(info != NULL);
-
- th = dt_trans_create(env, dt_dev);
- if (IS_ERR(th))
- RETURN(PTR_ERR(th));
-
- rc = dt_declare_record_write(env, seq->lss_obj,
- sizeof(struct lu_seq_range), 0, th);
- if (rc)
- GOTO(exit, rc);
-
- if (out != NULL) {
- rc = fld_declare_server_create(env,
- seq->lss_site->ss_server_fld,
- out, th);
- if (rc)
- GOTO(exit, rc);
- }
-
- rc = dt_trans_start_local(env, dt_dev, th);
- if (rc)
- GOTO(exit, rc);
-
- /* Store ranges in le format. */
- range_cpu_to_le(&info->sti_space, &seq->lss_space);
-
- rc = dt_record_write(env, seq->lss_obj, seq_store_buf(info), &pos, th);
- if (rc) {
- CERROR("%s: Can't write space data, rc %d\n",
- seq->lss_name, rc);
- GOTO(exit, rc);
- } else if (out != NULL) {
- rc = fld_server_create(env, seq->lss_site->ss_server_fld, out,
- th);
- if (rc) {
- CERROR("%s: Can't Update fld database, rc %d\n",
- seq->lss_name, rc);
- GOTO(exit, rc);
- }
- }
- /* next sequence update will need sync until this update is committed
- * in case of sync operation this is not needed obviously */
- if (!sync)
- /* if callback can't be added then sync always */
- sync = !!seq_update_cb_add(th, seq);
-
- th->th_sync |= sync;
-exit:
- dt_trans_stop(env, dt_dev, th);
- return rc;
-}
-
-/*
- * This function implies that caller takes care about locking or locking is not
- * needed (init time).
- */
-int seq_store_read(struct lu_server_seq *seq,
- const struct lu_env *env)
-{
- struct seq_thread_info *info;
- loff_t pos = 0;
- int rc;
- ENTRY;
-
- info = lu_context_key_get(&env->le_ctx, &seq_thread_key);
- LASSERT(info != NULL);
-
- rc = seq->lss_obj->do_body_ops->dbo_read(env, seq->lss_obj,
- seq_store_buf(info),
- &pos, BYPASS_CAPA);
-
- if (rc == sizeof(info->sti_space)) {
- range_le_to_cpu(&seq->lss_space, &info->sti_space);
- CDEBUG(D_INFO, "%s: Space - "DRANGE"\n",
- seq->lss_name, PRANGE(&seq->lss_space));
- rc = 0;
- } else if (rc == 0) {
- rc = -ENODATA;
- } else if (rc > 0) {
- CERROR("%s: Read only %d bytes of %d\n", seq->lss_name,
- rc, (int)sizeof(info->sti_space));
- rc = -EIO;
- }
-
- RETURN(rc);
-}
-
-int seq_store_init(struct lu_server_seq *seq,
- const struct lu_env *env,
- struct dt_device *dt)
-{
- struct dt_object *dt_obj;
- struct lu_fid fid;
- struct lu_attr attr;
- struct dt_object_format dof;
- const char *name;
- int rc;
- ENTRY;
-
- name = seq->lss_type == LUSTRE_SEQ_SERVER ?
- LUSTRE_SEQ_SRV_NAME : LUSTRE_SEQ_CTL_NAME;
-
- if (seq->lss_type == LUSTRE_SEQ_SERVER)
- lu_local_obj_fid(&fid, FID_SEQ_SRV_OID);
- else
- lu_local_obj_fid(&fid, FID_SEQ_CTL_OID);
-
- memset(&attr, 0, sizeof(attr));
- attr.la_valid = LA_MODE;
- attr.la_mode = S_IFREG | 0666;
- dof.dof_type = DFT_REGULAR;
-
- dt_obj = dt_find_or_create(env, dt, &fid, &dof, &attr);
- if (!IS_ERR(dt_obj)) {
- seq->lss_obj = dt_obj;
- rc = 0;
- } else {
- CERROR("%s: Can't find \"%s\" obj %d\n",
- seq->lss_name, name, (int)PTR_ERR(dt_obj));
- rc = PTR_ERR(dt_obj);
- }
-
- RETURN(rc);
-}
-
-void seq_store_fini(struct lu_server_seq *seq,
- const struct lu_env *env)
-{
- ENTRY;
-
- if (seq->lss_obj != NULL) {
- if (!IS_ERR(seq->lss_obj))
- lu_object_put(env, &seq->lss_obj->do_lu);
- seq->lss_obj = NULL;
- }
-
- EXIT;
-}
projects / karo-tx-linux.git / commitdiff