-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
* 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 [sun.com URL with a
- * copy of GPLv2].
- *
- * 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.
+ * version 2 along with this program; If not, see
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved
+ * 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/
#define DEBUG_SUBSYSTEM S_LOG
-#ifndef EXPORT_SYMTAB
-#define EXPORT_SYMTAB
-#endif
-
-#ifdef __KERNEL__
+#include <linux/list.h>
#include <libcfs/libcfs.h>
-#else
-#include <liblustre.h>
-#endif
#include <obd_class.h>
#include <lustre_log.h>
#include <lustre_net.h>
-#include <libcfs/list.h>
-#define LLOG_CLIENT_ENTRY(ctxt, imp) do { \
- mutex_down(&ctxt->loc_sem); \
+#define LLOG_CLIENT_ENTRY(ctxt, imp) do { \
+ mutex_lock(&ctxt->loc_mutex); \
if (ctxt->loc_imp) { \
imp = class_import_get(ctxt->loc_imp); \
} else { \
"but I'll try again next time. Not fatal.\n", \
ctxt->loc_idx); \
imp = NULL; \
- mutex_up(&ctxt->loc_sem); \
+ mutex_unlock(&ctxt->loc_mutex); \
return (-EINVAL); \
} \
- mutex_up(&ctxt->loc_sem); \
+ mutex_unlock(&ctxt->loc_mutex); \
} while(0)
-#define LLOG_CLIENT_EXIT(ctxt, imp) do { \
- mutex_down(&ctxt->loc_sem); \
- if (ctxt->loc_imp != imp) \
- CWARN("loc_imp has changed from %p to %p", \
- ctxt->loc_imp, imp); \
- class_import_put(imp); \
- mutex_up(&ctxt->loc_sem); \
+#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_create(struct llog_ctxt *ctxt, struct llog_handle **res,
- struct llog_logid *logid, char *name)
+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 *body;
- struct llog_handle *handle;
+ struct llog_ctxt *ctxt = lgh->lgh_ctxt;
struct ptlrpc_request *req = NULL;
int rc;
ENTRY;
LLOG_CLIENT_ENTRY(ctxt, imp);
- handle = llog_alloc_handle();
- if (handle == NULL)
- RETURN(-ENOMEM);
- *res = handle;
+ /* 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 == NULL)
- GOTO(err_free, rc = -ENOMEM);
+ req = ptlrpc_request_alloc(imp, &RQF_LLOG_ORIGIN_HANDLE_CREATE);
+ if (req == NULL)
+ GOTO(out, rc = -ENOMEM);
if (name)
req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
LLOG_ORIGIN_HANDLE_CREATE);
if (rc) {
ptlrpc_request_free(req);
- GOTO(err_free, rc);
+ req = NULL;
+ GOTO(out, rc);
}
ptlrpc_request_set_replen(req);
rc = ptlrpc_queue_wait(req);
if (rc)
- GOTO(err_free, rc);
+ GOTO(out, rc);
- body = req_capsule_server_get(&req->rq_pill, &RMF_LLOGD_BODY);
- if (body == NULL)
- GOTO(err_free, rc =-EFAULT);
+ body = req_capsule_server_get(&req->rq_pill, &RMF_LLOGD_BODY);
+ if (body == NULL)
+ GOTO(out, rc = -EFAULT);
- handle->lgh_id = body->lgd_logid;
- handle->lgh_ctxt = ctxt;
- EXIT;
+ lgh->lgh_id = body->lgd_logid;
+ lgh->lgh_ctxt = ctxt;
+ EXIT;
out:
- LLOG_CLIENT_EXIT(ctxt, imp);
- ptlrpc_req_finished(req);
- return rc;
-err_free:
- llog_free_handle(handle);
- goto out;
+ LLOG_CLIENT_EXIT(ctxt, imp);
+ ptlrpc_req_finished(req);
+ return rc;
}
-static int llog_client_destroy(struct llog_handle *loghandle)
+static int llog_client_destroy(const struct lu_env *env,
+ struct llog_handle *loghandle,
+ struct thandle *th)
{
struct obd_import *imp;
struct ptlrpc_request *req = NULL;
body->lgd_logid = loghandle->lgh_id;
body->lgd_llh_flags = loghandle->lgh_hdr->llh_flags;
+ if (!(body->lgd_llh_flags & LLOG_F_IS_PLAIN))
+ CERROR("%s: wrong llog flags %x\n", imp->imp_obd->obd_name,
+ body->lgd_llh_flags);
+
ptlrpc_request_set_replen(req);
rc = ptlrpc_queue_wait(req);
-
+
ptlrpc_req_finished(req);
err_exit:
LLOG_CLIENT_EXIT(loghandle->lgh_ctxt, imp);
}
-static int llog_client_next_block(struct llog_handle *loghandle,
- int *cur_idx, int next_idx,
- __u64 *cur_offset, void *buf, int len)
+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;
struct ptlrpc_request *req = NULL;
LLOG_ORIGIN_HANDLE_NEXT_BLOCK);
if (req == NULL)
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;
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 == NULL)
- GOTO(out, rc =-EFAULT);
+ /* -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 == NULL ||
+ lustre_msg_get_status(req->rq_repmsg) != -EIO)
+ GOTO(out, rc);
+ } else if (rc < 0) {
+ GOTO(out, rc);
+ }
+
+ body = req_capsule_server_get(&req->rq_pill, &RMF_LLOGD_BODY);
+ if (body == NULL)
+ 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 == NULL)
GOTO(out, rc =-EFAULT);
- *cur_idx = body->lgd_saved_index;
- *cur_offset = body->lgd_cur_offset;
-
memcpy(buf, ptr, len);
EXIT;
out:
return rc;
}
-static int llog_client_prev_block(struct llog_handle *loghandle,
- int prev_idx, void *buf, int len)
+static int llog_client_prev_block(const struct lu_env *env,
+ struct llog_handle *loghandle,
+ int prev_idx, void *buf, int len)
{
struct obd_import *imp;
struct ptlrpc_request *req = NULL;
return rc;
}
-static int llog_client_read_header(struct llog_handle *handle)
+static int llog_client_read_header(const struct lu_env *env,
+ struct llog_handle *handle)
{
struct obd_import *imp;
struct ptlrpc_request *req = NULL;
if (hdr == NULL)
GOTO(out, rc =-EFAULT);
- 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;
- }
- EXIT;
+ 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:
return rc;
}
-static int llog_client_close(struct llog_handle *handle)
+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
return(0);
}
-
struct llog_operations llog_client_ops = {
- lop_next_block: llog_client_next_block,
- lop_prev_block: llog_client_prev_block,
- lop_read_header: llog_client_read_header,
- lop_create: llog_client_create,
- lop_destroy: llog_client_destroy,
- 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_destroy = llog_client_destroy,
+ .lop_close = llog_client_close,
};
+EXPORT_SYMBOL(llog_client_ops);