Date: Sun, 20 Mar 2016 19:11:17 +0000 (UTC) From: Alexander Motin <mav@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r297074 - stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs Message-ID: <201603201911.u2KJBHrF036939@repo.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: mav Date: Sun Mar 20 19:11:17 2016 New Revision: 297074 URL: https://svnweb.freebsd.org/changeset/base/297074 Log: MFC r271788 (by will): Enable ZFS debug flags to be modified via vfs.zfs.debug_flags. This is primarily only of interest to ZFS developers, but it makes it easier to get additional debugging. MFSpectraBSD: 517074 on 2011/12/15 (by will), 662343 on 2013/03/20 (by gibbs) Modified: stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa_misc.c Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa_misc.c ============================================================================== --- stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa_misc.c Sun Mar 20 19:07:12 2016 (r297073) +++ stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa_misc.c Sun Mar 20 19:11:17 2016 (r297074) @@ -263,6 +263,33 @@ TUNABLE_INT("vfs.zfs.recover", &zfs_reco SYSCTL_INT(_vfs_zfs, OID_AUTO, recover, CTLFLAG_RWTUN, &zfs_recover, 0, "Try to recover from otherwise-fatal errors."); +static int +sysctl_vfs_zfs_debug_flags(SYSCTL_HANDLER_ARGS) +{ + int err, val; + + val = zfs_flags; + err = sysctl_handle_int(oidp, &val, 0, req); + if (err != 0 || req->newptr == NULL) + return (err); + + /* + * ZFS_DEBUG_MODIFY must be enabled prior to boot so all + * arc buffers in the system have the necessary additional + * checksum data. However, it is safe to disable at any + * time. + */ + if (!(zfs_flags & ZFS_DEBUG_MODIFY)) + val &= ~ZFS_DEBUG_MODIFY; + zfs_flags = val; + + return (0); +} +TUNABLE_INT("vfs.zfs.debug_flags", &zfs_flags); +SYSCTL_PROC(_vfs_zfs, OID_AUTO, debug_flags, + CTLTYPE_UINT | CTLFLAG_MPSAFE | CTLFLAG_RW, 0, sizeof(int), + sysctl_vfs_zfs_debug_flags, "IU", "Debug flags for ZFS testing."); + /* * If destroy encounters an EIO while reading metadata (e.g. indirect * blocks), space referenced by the missing metadata can not be freed.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201603201911.u2KJBHrF036939>