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e8ede2ba78
Just nice and simple, with room to grow. Reviewed by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Alexander Motin <mav@FreeBSD.org> Signed-off-by: Rob Norris <robn@despairlabs.com> Sponsored-by: https://despairlabs.com/sponsor/ Closes #16492
107 lines
2.8 KiB
C
107 lines
2.8 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or https://opensource.org/licenses/CDDL-1.0.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2012, 2014 by Delphix. All rights reserved.
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* Copyright (c) 2024, Rob Norris <robn@despairlabs.com>
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*/
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#include <sys/zfs_context.h>
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typedef struct zfs_dbgmsg {
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list_node_t zdm_node;
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uint64_t zdm_timestamp;
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uint_t zdm_size;
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char zdm_msg[]; /* variable length allocation */
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} zfs_dbgmsg_t;
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static list_t zfs_dbgmsgs;
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static kmutex_t zfs_dbgmsgs_lock;
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int zfs_dbgmsg_enable = B_TRUE;
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void
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zfs_dbgmsg_init(void)
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{
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list_create(&zfs_dbgmsgs, sizeof (zfs_dbgmsg_t),
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offsetof(zfs_dbgmsg_t, zdm_node));
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mutex_init(&zfs_dbgmsgs_lock, NULL, MUTEX_DEFAULT, NULL);
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}
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void
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zfs_dbgmsg_fini(void)
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{
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zfs_dbgmsg_t *zdm;
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while ((zdm = list_remove_head(&zfs_dbgmsgs)))
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umem_free(zdm, zdm->zdm_size);
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mutex_destroy(&zfs_dbgmsgs_lock);
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}
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void
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__set_error(const char *file, const char *func, int line, int err)
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{
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if (zfs_flags & ZFS_DEBUG_SET_ERROR)
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__dprintf(B_FALSE, file, func, line, "error %lu",
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(ulong_t)err);
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}
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void
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__zfs_dbgmsg(char *buf)
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{
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uint_t size = sizeof (zfs_dbgmsg_t) + strlen(buf) + 1;
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zfs_dbgmsg_t *zdm = umem_zalloc(size, KM_SLEEP);
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zdm->zdm_size = size;
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zdm->zdm_timestamp = gethrestime_sec();
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strcpy(zdm->zdm_msg, buf);
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mutex_enter(&zfs_dbgmsgs_lock);
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list_insert_tail(&zfs_dbgmsgs, zdm);
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mutex_exit(&zfs_dbgmsgs_lock);
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}
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void
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zfs_dbgmsg_print(int fd, const char *tag)
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{
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ssize_t ret __attribute__((unused));
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mutex_enter(&zfs_dbgmsgs_lock);
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/*
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* We use write() in this function instead of printf()
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* so it is safe to call from a signal handler.
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*/
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ret = write(fd, "ZFS_DBGMSG(", 11);
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ret = write(fd, tag, strlen(tag));
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ret = write(fd, ") START:\n", 9);
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for (zfs_dbgmsg_t *zdm = list_head(&zfs_dbgmsgs); zdm != NULL;
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zdm = list_next(&zfs_dbgmsgs, zdm)) {
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ret = write(fd, zdm->zdm_msg, strlen(zdm->zdm_msg));
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ret = write(fd, "\n", 1);
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}
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ret = write(fd, "ZFS_DBGMSG(", 11);
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ret = write(fd, tag, strlen(tag));
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ret = write(fd, ") END\n", 6);
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mutex_exit(&zfs_dbgmsgs_lock);
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}
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