-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
+/*
+ * GPL HEADER START
*
- * Copyright (C) 2001-2004 Cluster File Systems, Inc.
- * Author: Andreas Dilger <adilger@clusterfs.com>
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
- * This file is part of Lustre, http://www.lustre.org.
+ * 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.
*
- * Lustre is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License 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).
*
- * Lustre 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 for more details.
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
- * You should have received a copy of the GNU General Public License
- * along with Lustre; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2012, 2015, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lustre/ptlrpc/llog_client.c
*
- * remote api for llog - client side
+ * remote api for llog - client side
*
+ * Author: Andreas Dilger <adilger@clusterfs.com>
*/
#define DEBUG_SUBSYSTEM S_LOG
-#ifndef EXPORT_SYMTAB
-#define EXPORT_SYMTAB
-#endif
-
-#ifdef __KERNEL__
-#include <linux/fs.h>
-#else
-#include <liblustre.h>
-#endif
-
-#include <linux/obd_class.h>
-#include <linux/lustre_log.h>
-#include <linux/lustre_net.h>
-#include <portals/list.h>
-
-/* This is a callback from the llog_* functions.
- * Assumes caller has already pushed us into the kernel context. */
-static int llog_client_open(struct llog_ctxt *ctxt, struct llog_handle **res,
- struct llog_logid *logid, char *name, int flags)
+#include <linux/list.h>
+#include <libcfs/libcfs.h>
+
+#include <obd_class.h>
+#include <lustre_log.h>
+#include <lustre_net.h>
+
+#define LLOG_CLIENT_ENTRY(ctxt, imp) do { \
+ mutex_lock(&ctxt->loc_mutex); \
+ if (ctxt->loc_imp) { \
+ imp = class_import_get(ctxt->loc_imp); \
+ } else { \
+ CERROR("ctxt->loc_imp == NULL for context idx %d." \
+ "Unable to complete MDS/OSS recovery," \
+ "but I'll try again next time. Not fatal.\n", \
+ ctxt->loc_idx); \
+ imp = NULL; \
+ mutex_unlock(&ctxt->loc_mutex); \
+ return -EINVAL; \
+ } \
+ mutex_unlock(&ctxt->loc_mutex); \
+} while (0)
+
+#define LLOG_CLIENT_EXIT(ctxt, imp) do { \
+ mutex_lock(&ctxt->loc_mutex); \
+ if (ctxt->loc_imp != imp) \
+ CWARN("loc_imp has changed from %p to %p\n", \
+ ctxt->loc_imp, imp); \
+ class_import_put(imp); \
+ mutex_unlock(&ctxt->loc_mutex); \
+} while (0)
+
+/*
+ * This is a callback from the llog_* functions.
+ * Assumes caller has already pushed us into the kernel context.
+ */
+static int llog_client_open(const struct lu_env *env,
+ struct llog_handle *lgh, struct llog_logid *logid,
+ char *name, enum llog_open_param open_param)
{
- struct obd_import *imp;
- struct llogd_body req_body;
- struct llogd_body *body;
- struct llog_handle *handle;
- struct ptlrpc_request *req = NULL;
- int size[2] = {sizeof(req_body)};
- char *tmp[2] = {(char*) &req_body};
- int bufcount = 1, repsize[] = {sizeof (req_body)}, rc;
- ENTRY;
-
- LASSERT(ctxt->loc_imp);
- imp = ctxt->loc_imp;
-
- handle = llog_alloc_handle();
- if (handle == NULL)
- RETURN(-ENOMEM);
- *res = handle;
-
- memset(&req_body, 0, sizeof(req_body));
- if (logid)
- req_body.lgd_logid = *logid;
- req_body.lgd_ctxt_idx = ctxt->loc_idx - 1;
- req_body.lgd_llh_flags = flags;
-
- if (name) {
- size[bufcount] = strlen(name) + 1;
- tmp[bufcount] = name;
- bufcount++;
- }
-
- req = ptlrpc_prep_req(imp, LLOG_ORIGIN_HANDLE_OPEN, bufcount, size,tmp);
- if (!req)
- GOTO(err_free, rc = -ENOMEM);
-
- req->rq_replen = lustre_msg_size(1, repsize);
- rc = ptlrpc_queue_wait(req);
- if (rc)
- GOTO(err_free, rc);
-
- body = lustre_swab_repbuf(req, 0, sizeof(*body),
- lustre_swab_llogd_body);
- if (body == NULL) {
- CERROR ("Can't unpack llogd_body\n");
- GOTO(err_free, rc =-EFAULT);
- }
-
- handle->lgh_id = body->lgd_logid;
- handle->lgh_ctxt = ctxt;
+ struct obd_import *imp;
+ struct llogd_body *body;
+ struct llog_ctxt *ctxt = lgh->lgh_ctxt;
+ struct ptlrpc_request *req = NULL;
+ int rc;
+
+ ENTRY;
+
+ LLOG_CLIENT_ENTRY(ctxt, imp);
+
+ /* client cannot create llog */
+ LASSERTF(open_param != LLOG_OPEN_NEW, "%#x\n", open_param);
+ LASSERT(lgh);
+
+ req = ptlrpc_request_alloc(imp, &RQF_LLOG_ORIGIN_HANDLE_CREATE);
+ if (!req)
+ GOTO(out, rc = -ENOMEM);
+
+ if (name)
+ req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
+ strlen(name) + 1);
+
+ rc = ptlrpc_request_pack(req, LUSTRE_LOG_VERSION,
+ LLOG_ORIGIN_HANDLE_CREATE);
+ if (rc) {
+ ptlrpc_request_free(req);
+ req = NULL;
+ GOTO(out, rc);
+ }
+ ptlrpc_request_set_replen(req);
-out:
- if (req)
- ptlrpc_req_finished(req);
- RETURN(rc);
+ body = req_capsule_client_get(&req->rq_pill, &RMF_LLOGD_BODY);
+ if (logid)
+ body->lgd_logid = *logid;
+ body->lgd_ctxt_idx = ctxt->loc_idx - 1;
-err_free:
- llog_free_handle(handle);
- goto out;
-}
+ if (name) {
+ char *tmp;
-static int llog_client_prev_block(struct llog_handle *loghandle,
- int prev_idx, void *buf, int len)
-{
- struct obd_import *imp = loghandle->lgh_ctxt->loc_imp;
- struct ptlrpc_request *req = NULL;
- struct llogd_body *body;
- void * ptr;
- int size = sizeof(*body);
- int repsize[2] = {sizeof (*body)};
- int rc;
- ENTRY;
-
- req = ptlrpc_prep_req(imp, LLOG_ORIGIN_HANDLE_PREV_BLOCK, 1,&size,NULL);
- if (!req)
- GOTO(out, rc = -ENOMEM);
-
- body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof (*body));
- body->lgd_logid = loghandle->lgh_id;
- body->lgd_ctxt_idx = loghandle->lgh_ctxt->loc_idx - 1;
- body->lgd_llh_flags = loghandle->lgh_hdr->llh_flags;
- body->lgd_index = prev_idx;
- body->lgd_len = len;
- repsize[1] = len;
-
- req->rq_replen = lustre_msg_size(2, repsize);
- rc = ptlrpc_queue_wait(req);
- if (rc)
- GOTO(out, rc);
-
- body = lustre_swab_repbuf(req, 0, sizeof(*body),
- lustre_swab_llogd_body);
- if (body == NULL) {
- CERROR ("Can't unpack llogd_body\n");
- GOTO(out, rc =-EFAULT);
- }
-
- ptr = lustre_msg_buf(req->rq_repmsg, 1, len);
- if (ptr == NULL) {
- CERROR ("Can't unpack bitmap\n");
- GOTO(out, rc =-EFAULT);
- }
-
- memcpy(buf, ptr, len);
-
-out:
- if (req)
- ptlrpc_req_finished(req);
- RETURN(rc);
-}
+ tmp = req_capsule_client_sized_get(&req->rq_pill, &RMF_NAME,
+ strlen(name) + 1);
+ LASSERT(tmp);
+ strcpy(tmp, name);
+ }
-static int llog_client_next_block(struct llog_handle *loghandle,
- int *cur_idx, int next_idx,
- __u64 *cur_offset, void *buf, int len)
-{
- struct obd_import *imp = loghandle->lgh_ctxt->loc_imp;
- struct ptlrpc_request *req = NULL;
- struct llogd_body *body;
- void * ptr;
- int size = sizeof(*body);
- int repsize[2] = {sizeof (*body)};
- int rc;
- ENTRY;
-
- req = ptlrpc_prep_req(imp, LLOG_ORIGIN_HANDLE_NEXT_BLOCK, 1,&size,NULL);
- if (!req)
- GOTO(out, rc = -ENOMEM);
-
- body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof (*body));
- body->lgd_logid = loghandle->lgh_id;
- body->lgd_ctxt_idx = loghandle->lgh_ctxt->loc_idx - 1;
- body->lgd_llh_flags = loghandle->lgh_hdr->llh_flags;
- body->lgd_index = next_idx;
- body->lgd_saved_index = *cur_idx;
- body->lgd_len = len;
- body->lgd_cur_offset = *cur_offset;
- repsize[1] = len;
-
- req->rq_replen = lustre_msg_size(2, repsize);
- rc = ptlrpc_queue_wait(req);
- if (rc)
- GOTO(out, rc);
-
- body = lustre_swab_repbuf(req, 0, sizeof(*body),
- lustre_swab_llogd_body);
- if (body == NULL) {
- CERROR ("Can't unpack llogd_body\n");
- GOTO(out, rc =-EFAULT);
- }
-
- ptr = lustre_msg_buf(req->rq_repmsg, 1, len);
- if (ptr == NULL) {
- CERROR ("Can't unpack bitmap\n");
- GOTO(out, rc =-EFAULT);
- }
-
- *cur_idx = body->lgd_saved_index;
- *cur_offset = body->lgd_cur_offset;
-
- memcpy(buf, ptr, len);
+ rc = ptlrpc_queue_wait(req);
+ if (rc)
+ GOTO(out, rc);
+ body = req_capsule_server_get(&req->rq_pill, &RMF_LLOGD_BODY);
+ if (!body)
+ GOTO(out, rc = -EFAULT);
+
+ lgh->lgh_id = body->lgd_logid;
+ lgh->lgh_ctxt = ctxt;
+ EXIT;
out:
- if (req)
- ptlrpc_req_finished(req);
- RETURN(rc);
+ LLOG_CLIENT_EXIT(ctxt, imp);
+ ptlrpc_req_finished(req);
+ return rc;
}
-
-static int llog_client_read_header(struct llog_handle *handle)
+static int llog_client_next_block(const struct lu_env *env,
+ struct llog_handle *loghandle,
+ int *cur_idx, int next_idx,
+ __u64 *cur_offset, void *buf, int len)
{
- struct obd_import *imp = handle->lgh_ctxt->loc_imp;
- struct ptlrpc_request *req = NULL;
- struct llogd_body *body;
- struct llog_log_hdr *hdr;
- struct llog_rec_hdr *llh_hdr;
- int size = sizeof(*body);
- int repsize = sizeof (*hdr);
- int rc;
- ENTRY;
-
- req = ptlrpc_prep_req(imp, LLOG_ORIGIN_HANDLE_READ_HEADER,1,&size,NULL);
- if (!req)
- GOTO(out, rc = -ENOMEM);
-
- body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof (*body));
- body->lgd_logid = handle->lgh_id;
- body->lgd_ctxt_idx = handle->lgh_ctxt->loc_idx - 1;
- body->lgd_llh_flags = handle->lgh_hdr->llh_flags;
-
- req->rq_replen = lustre_msg_size(1, &repsize);
- rc = ptlrpc_queue_wait(req);
- if (rc)
- GOTO(out, rc);
-
- hdr = lustre_swab_repbuf(req, 0, sizeof(*hdr), lustre_swab_llog_hdr);
- if (hdr == NULL) {
- CERROR ("Can't unpack llog_hdr\n");
- GOTO(out, rc =-EFAULT);
+ struct obd_import *imp;
+ struct ptlrpc_request *req = NULL;
+ struct llogd_body *body;
+ void *ptr;
+ int rc;
+
+ ENTRY;
+
+ LLOG_CLIENT_ENTRY(loghandle->lgh_ctxt, imp);
+ req = ptlrpc_request_alloc_pack(imp, &RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK,
+ LUSTRE_LOG_VERSION,
+ LLOG_ORIGIN_HANDLE_NEXT_BLOCK);
+ if (!req)
+ GOTO(err_exit, rc = -ENOMEM);
+
+ body = req_capsule_client_get(&req->rq_pill, &RMF_LLOGD_BODY);
+ body->lgd_logid = loghandle->lgh_id;
+ body->lgd_ctxt_idx = loghandle->lgh_ctxt->loc_idx - 1;
+ body->lgd_llh_flags = loghandle->lgh_hdr->llh_flags;
+ body->lgd_index = next_idx;
+ body->lgd_saved_index = *cur_idx;
+ body->lgd_len = len;
+ body->lgd_cur_offset = *cur_offset;
+
+ req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_SERVER, len);
+ ptlrpc_request_set_replen(req);
+ rc = ptlrpc_queue_wait(req);
+ /*
+ * -EIO has a special meaning here. If llog_osd_next_block()
+ * reaches the end of the log without finding the desired
+ * record then it updates *cur_offset and *cur_idx and returns
+ * -EIO. In llog_process_thread() we use this to detect
+ * EOF. But we must be careful to distinguish between -EIO
+ * coming from llog_osd_next_block() and -EIO coming from
+ * ptlrpc or below.
+ */
+ if (rc == -EIO) {
+ if (!req->rq_repmsg ||
+ lustre_msg_get_status(req->rq_repmsg) != -EIO)
+ GOTO(out, rc);
+ } else if (rc < 0) {
+ GOTO(out, rc);
}
- memcpy(handle->lgh_hdr, hdr, sizeof (*hdr));
- handle->lgh_last_idx = handle->lgh_hdr->llh_tail.lrt_index;
-
- /* sanity checks */
- llh_hdr = &handle->lgh_hdr->llh_hdr;
- if (llh_hdr->lrh_type != LLOG_HDR_MAGIC) {
- CERROR("bad log header magic: %#x (expecting %#x)\n",
- llh_hdr->lrh_type, LLOG_HDR_MAGIC);
- rc = -EIO;
- } else if (llh_hdr->lrh_len != LLOG_CHUNK_SIZE) {
- CERROR("incorrectly sized log header: %#x "
- "(expecting %#x)\n",
- llh_hdr->lrh_len, LLOG_CHUNK_SIZE);
- CERROR("you may need to re-run lconf --write_conf.\n");
- rc = -EIO;
- }
+ body = req_capsule_server_get(&req->rq_pill, &RMF_LLOGD_BODY);
+ if (!body)
+ GOTO(out, rc = -EFAULT);
+
+ *cur_idx = body->lgd_saved_index;
+ *cur_offset = body->lgd_cur_offset;
+ if (rc < 0)
+ GOTO(out, rc);
+
+ /* The log records are swabbed as they are processed */
+ ptr = req_capsule_server_get(&req->rq_pill, &RMF_EADATA);
+ if (!ptr)
+ GOTO(out, rc = -EFAULT);
+
+ memcpy(buf, ptr, len);
+ EXIT;
out:
- if (req)
- ptlrpc_req_finished(req);
- RETURN(rc);
+ ptlrpc_req_finished(req);
+err_exit:
+ LLOG_CLIENT_EXIT(loghandle->lgh_ctxt, imp);
+ return rc;
}
-static int llog_client_close(struct llog_handle *handle)
+static int llog_client_prev_block(const struct lu_env *env,
+ struct llog_handle *loghandle,
+ int prev_idx, void *buf, int len)
{
- int rc = 0;
+ struct obd_import *imp;
+ struct ptlrpc_request *req = NULL;
+ struct llogd_body *body;
+ void *ptr;
+ int rc;
+
+ ENTRY;
+
+ LLOG_CLIENT_ENTRY(loghandle->lgh_ctxt, imp);
+ req = ptlrpc_request_alloc_pack(imp, &RQF_LLOG_ORIGIN_HANDLE_PREV_BLOCK,
+ LUSTRE_LOG_VERSION,
+ LLOG_ORIGIN_HANDLE_PREV_BLOCK);
+ if (!req)
+ GOTO(err_exit, rc = -ENOMEM);
+
+ body = req_capsule_client_get(&req->rq_pill, &RMF_LLOGD_BODY);
+ body->lgd_logid = loghandle->lgh_id;
+ body->lgd_ctxt_idx = loghandle->lgh_ctxt->loc_idx - 1;
+ body->lgd_llh_flags = loghandle->lgh_hdr->llh_flags;
+ body->lgd_index = prev_idx;
+ body->lgd_len = len;
+
+ req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_SERVER, len);
+ ptlrpc_request_set_replen(req);
+
+ rc = ptlrpc_queue_wait(req);
+ if (rc)
+ GOTO(out, rc);
+
+ body = req_capsule_server_get(&req->rq_pill, &RMF_LLOGD_BODY);
+ if (!body)
+ GOTO(out, rc = -EFAULT);
+
+ ptr = req_capsule_server_get(&req->rq_pill, &RMF_EADATA);
+ if (!ptr)
+ GOTO(out, rc = -EFAULT);
+
+ memcpy(buf, ptr, len);
+ EXIT;
+out:
+ ptlrpc_req_finished(req);
+err_exit:
+ LLOG_CLIENT_EXIT(loghandle->lgh_ctxt, imp);
+ return rc;
+}
- RETURN(rc);
+static int llog_client_read_header(const struct lu_env *env,
+ struct llog_handle *handle)
+{
+ struct obd_import *imp;
+ struct ptlrpc_request *req = NULL;
+ struct llogd_body *body;
+ struct llog_log_hdr *hdr;
+ struct llog_rec_hdr *llh_hdr;
+ int rc;
+
+ ENTRY;
+
+ LLOG_CLIENT_ENTRY(handle->lgh_ctxt, imp);
+ req = ptlrpc_request_alloc_pack(imp,
+ &RQF_LLOG_ORIGIN_HANDLE_READ_HEADER,
+ LUSTRE_LOG_VERSION,
+ LLOG_ORIGIN_HANDLE_READ_HEADER);
+ if (!req)
+ GOTO(err_exit, rc = -ENOMEM);
+
+ body = req_capsule_client_get(&req->rq_pill, &RMF_LLOGD_BODY);
+ body->lgd_logid = handle->lgh_id;
+ body->lgd_ctxt_idx = handle->lgh_ctxt->loc_idx - 1;
+ body->lgd_llh_flags = handle->lgh_hdr->llh_flags;
+
+ ptlrpc_request_set_replen(req);
+ rc = ptlrpc_queue_wait(req);
+ if (rc)
+ GOTO(out, rc);
+
+ hdr = req_capsule_server_get(&req->rq_pill, &RMF_LLOG_LOG_HDR);
+ if (!hdr)
+ GOTO(out, rc = -EFAULT);
+
+ if (handle->lgh_hdr_size < hdr->llh_hdr.lrh_len)
+ GOTO(out, rc = -EFAULT);
+
+ memcpy(handle->lgh_hdr, hdr, hdr->llh_hdr.lrh_len);
+ handle->lgh_last_idx = LLOG_HDR_TAIL(handle->lgh_hdr)->lrt_index;
+
+ /* sanity checks */
+ llh_hdr = &handle->lgh_hdr->llh_hdr;
+ if (llh_hdr->lrh_type != LLOG_HDR_MAGIC) {
+ CERROR("bad log header magic: %#x (expecting %#x)\n",
+ llh_hdr->lrh_type, LLOG_HDR_MAGIC);
+ rc = -EIO;
+ } else if (llh_hdr->lrh_len !=
+ LLOG_HDR_TAIL(handle->lgh_hdr)->lrt_len ||
+ (llh_hdr->lrh_len & (llh_hdr->lrh_len - 1)) != 0 ||
+ llh_hdr->lrh_len < LLOG_MIN_CHUNK_SIZE ||
+ llh_hdr->lrh_len > handle->lgh_hdr_size) {
+ CERROR("incorrectly sized log header: %#x, expecting %#x (power of two > 8192)\n",
+ llh_hdr->lrh_len,
+ LLOG_HDR_TAIL(handle->lgh_hdr)->lrt_len);
+ CERROR("you may need to re-run lconf --write_conf.\n");
+ rc = -EIO;
+ }
+ EXIT;
+out:
+ ptlrpc_req_finished(req);
+err_exit:
+ LLOG_CLIENT_EXIT(handle->lgh_ctxt, imp);
+ return rc;
}
+static int llog_client_close(const struct lu_env *env,
+ struct llog_handle *handle)
+{
+ /*
+ * this doesn't call LLOG_ORIGIN_HANDLE_CLOSE because
+ * the servers all close the file at the end of every
+ * other LLOG_ RPC.
+ */
+ return 0;
+}
struct llog_operations llog_client_ops = {
- lop_prev_block: llog_client_prev_block,
- lop_next_block: llog_client_next_block,
- lop_read_header: llog_client_read_header,
- lop_open: llog_client_open,
- lop_close: llog_client_close,
+ .lop_next_block = llog_client_next_block,
+ .lop_prev_block = llog_client_prev_block,
+ .lop_read_header = llog_client_read_header,
+ .lop_open = llog_client_open,
+ .lop_close = llog_client_close,
};
+EXPORT_SYMBOL(llog_client_ops);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff