3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling * CDDL HEADER START
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3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling * Common Development and Distribution License (the "License").
3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling * You may not use this file except in compliance with the License.
3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling * See the License for the specific language governing permissions
3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling * and limitations under the License.
3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling * When distributing Covered Code, include this CDDL HEADER in each
3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling * If applicable, add the following below this CDDL HEADER, with the
3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling * fields enclosed by brackets "[]" replaced with your own identifying
3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling * information: Portions Copyright [yyyy] [name of copyright owner]
3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling * CDDL HEADER END
3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
2a104a5236475eb73aa41eaaf3ed9f3ccbe0ca55Alex Reece * Copyright (c) 2012, 2014 by Delphix. All rights reserved.
3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling mutex_init(&zfs_dbgmsgs_lock, NULL, MUTEX_DEFAULT, NULL);
3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling while ((zdm = list_remove_head(&zfs_dbgmsgs)) != NULL) {
3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling int size = sizeof (zfs_dbgmsg_t) + strlen(zdm->zdm_msg);
3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling * Print these messages by running:
fb09f5aad449c97fe309678f3f604982b563a96fMadhav Suresh * echo ::zfs_dbgmsg | mdb -k
3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling * Monitor these messages by running:
2a104a5236475eb73aa41eaaf3ed9f3ccbe0ca55Alex Reece * dtrace -qn 'zfs-dbgmsg{printf("%s\n", stringof(arg0))}'
2a104a5236475eb73aa41eaaf3ed9f3ccbe0ca55Alex Reece * When used with libzpool, monitor with:
2a104a5236475eb73aa41eaaf3ed9f3ccbe0ca55Alex Reece * dtrace -qn 'zfs$pid::zfs_dbgmsg:probe1{printf("%s\n", copyinstr(arg1))}'
3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling * There is one byte of string in sizeof (zfs_dbgmsg_t), used
3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling * for the terminating null.
3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zdm = kmem_alloc(sizeof (zfs_dbgmsg_t) + size, KM_SLEEP);
3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (void) vsnprintf(zdm->zdm_msg, size + 1, fmt, adx);
3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling size = sizeof (zfs_dbgmsg_t) + strlen(zdm->zdm_msg);