diff options
| author | Gordon Ross <gwr@nexenta.com> | 2019-09-11 17:12:06 -0400 |
|---|---|---|
| committer | Gordon Ross <gordon.w.ross@gmail.com> | 2022-01-24 08:07:18 -0500 |
| commit | 1c53c56f27c8091f8066fb65aceeca8ee8b6df7a (patch) | |
| tree | 46931bde73a4d60859d718d2eabbe08076f3bf0b /usr/src/cmd/smbsrv | |
| parent | 49a4bc70cea348bb81385206be344cf03f3d2b7c (diff) | |
| download | illumos-joyent-1c53c56f27c8091f8066fb65aceeca8ee8b6df7a.tar.gz | |
14095 Dtrace probes for nbmand conflict identification
Reviewed by: Yuri Pankov <yuri.pankov@nexenta.com>
Reviewed by: Joyce McIntosh <joyce.mcintosh@nexenta.com>
Reviewed by: Evan Layton <evan.layton@nexenta.com>
Approved by: Robert Mustacchi <rm@fingolfin.org>
Diffstat (limited to 'usr/src/cmd/smbsrv')
| -rw-r--r-- | usr/src/cmd/smbsrv/dtrace/Makefile | 3 | ||||
| -rw-r--r-- | usr/src/cmd/smbsrv/dtrace/nbl-conflict.d | 56 |
2 files changed, 58 insertions, 1 deletions
diff --git a/usr/src/cmd/smbsrv/dtrace/Makefile b/usr/src/cmd/smbsrv/dtrace/Makefile index 0ed2c858af..cf25f9c735 100644 --- a/usr/src/cmd/smbsrv/dtrace/Makefile +++ b/usr/src/cmd/smbsrv/dtrace/Makefile @@ -26,7 +26,8 @@ # SRCS= smbd-all.d smbd-authsvc.d smbd-doorsvc.d smbd-pipesvc.d \ - smbnode.d smbsrv.d smbvfs.d smb-trace.d smb2-trace.d + smbnode.d smbsrv.d smbvfs.d smb-trace.d smb2-trace.d \ + nbl-conflict.d include ../../Makefile.cmd diff --git a/usr/src/cmd/smbsrv/dtrace/nbl-conflict.d b/usr/src/cmd/smbsrv/dtrace/nbl-conflict.d new file mode 100644 index 0000000000..da66f76679 --- /dev/null +++ b/usr/src/cmd/smbsrv/dtrace/nbl-conflict.d @@ -0,0 +1,56 @@ +#!/usr/sbin/dtrace -s + +/* + * This file and its contents are supplied under the terms of the + * Common Development and Distribution License ("CDDL"), version 1.0. + * You may only use this file in accordance with the terms of version + * 1.0 of the CDDL. + * + * A full copy of the text of the CDDL should have accompanied this + * source. A copy of the CDDL is also available via the Internet at + * http://www.illumos.org/license/CDDL. + */ + +/* + * Copyright 2019 Nexenta Systems, Inc. All rights reserved. + */ + +/* + * This dtrace script shows how to track down the owners of locks + * that prevent I/O in filesystems with mandatory locking enabled + * (eg. ZFS with nbmand=on). This script is not in any way specific + * to SMB, but this problem is most often seen when SMB is in use + * because SMB requires mandatory locking semantics. + * + * Run this script, eg. dtrace -s nbl-conflict.d + * taking note of these fields in the dtrace output: + * conflict_lock: .l_sysid .l_pid + * conflict_shrlock: .s_sysid .s_pid + * + * The sysid values tell you if a local or remote owner has the + * lock or share preventing I/O, and the pid tells which process. + */ + +sdt::nbl_lock_conflict:conflict_lock +{ + this->lock = (lock_descriptor_t *)arg0; + print(this->lock->l_flock); +} + +sdt::nbl_share_conflict:conflict_shrlock +{ + this->shrl = (struct shrlock *)arg0; + print(*(this->shrl)); +} + +/* + * The above probe action in nbl_share_conflict shows conflicts + * with read/write operations (eg. from the NFS server). + * This probe action shows share reservation conflicts at open. + * (Remove this if you're only interested in I/O conflicts.) + */ +sdt::add_share:conflict_shrlock +{ + this->shrl = (struct shrlock *)arg0; + print(*(this->shrl)); +} |