zfs/debian: add packaging files

based on Debian's packaging work, but simplified: - no DKMS - no dracut - no udebs and remove old patches which were based on top of Debian's packaging. Reviewed-by: Stoiko Ivanov <s.ivanov@proxmox.com> Tested-by: Stoiko Ivanov <s.ivanov@proxmox.com> Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
2019-01-30 15:26:24 +01:00
parent 2e2aafd11c
commit 28f635be8c
56 changed files with 4323 additions and 718 deletions
@@ -0,0 +1,68 @@
+From: Debian ZFS on Linux maintainers
+ <pkg-zfsonlinux-devel@alioth-lists.debian.net>
+Date: Wed, 30 Jan 2019 15:12:04 +0100
+Subject: Check-for-META-and-DCH-consistency-in-autoconf
+
+---
+ config/zfs-meta.m4 | 34 +++++++++++++++++++++++++++++-----
+ 1 file changed, 29 insertions(+), 5 deletions(-)
+
+diff --git a/config/zfs-meta.m4 b/config/zfs-meta.m4
+index 3e1429d..b8e26c4 100644
+--- a/config/zfs-meta.m4
+++ b/config/zfs-meta.m4
+@@ -1,9 +1,10 @@
+ dnl #
+ dnl # DESCRIPTION:
+-dnl # Read meta data from the META file.  When building from a git repository
+-dnl # the ZFS_META_RELEASE field will be overwritten if there is an annotated
+-dnl # tag matching the form ZFS_META_NAME-ZFS_META_VERSION-*.  This allows
+-dnl # for working builds to be uniquely identified using the git commit hash.
+dnl # Read meta data from the META file or the debian/changelog file if it
+dnl # exists.  When building from a git repository the ZFS_META_RELEASE field
+dnl # will be overwritten if there is an annotated tag matching the form
+dnl # ZFS_META_NAME-ZFS_META_VERSION-*.  This allows for working builds to be
+dnl # uniquely identified using the git commit hash.
+ dnl #
+ dnl #    The META file format is as follows:
+ dnl #      ^[ ]*KEY:[ \t]+VALUE$
+@@ -49,6 +50,7 @@ AC_DEFUN([ZFS_AC_META], [
+ 	_zfs_ac_meta_type="none"
+ 	if test -f "$META"; then
+ 		_zfs_ac_meta_type="META file"
+		_dpkg_parsechangelog=$(dpkg-parsechangelog 2>/dev/null)
+ 
+ 		ZFS_META_NAME=_ZFS_AC_META_GETVAL([(Name|Project|Package)]);
+ 		if test -n "$ZFS_META_NAME"; then
+@@ -66,8 +68,30 @@ AC_DEFUN([ZFS_AC_META], [
+ 			AC_SUBST([ZFS_META_VERSION])
+ 		fi
+ 
+		if test -n "${_dpkg_parsechangelog}"; then
+			_dpkg_version=$(echo "${_dpkg_parsechangelog}" \
+				| $AWK '$[]1 == "Version:" { print $[]2; }' \
+				| cut -d- -f1)
+			if test "${_dpkg_version}" != "$ZFS_META_VERSION"; then
+				AC_MSG_ERROR([
+	*** Version $ZFS_META_VERSION in the META file is different than
+	*** version $_dpkg_version in the debian/changelog file. DKMS and DEB
+	*** packaging require that these files have the same version.
+				])
+			fi
+		fi
+
+ 		ZFS_META_RELEASE=_ZFS_AC_META_GETVAL([Release]);
+-		if test ! -f ".nogitrelease" && git rev-parse --git-dir > /dev/null 2>&1; then
+
+		if test -n "${_dpkg_parsechangelog}"; then
+			_dpkg_release=$(echo "${_dpkg_parsechangelog}" \
+				| $AWK '$[]1 == "Version:" { print $[]2; }' \
+				| cut -d- -f2-)
+			if test -n "${_dpkg_release}"; then
+				ZFS_META_RELEASE=${_dpkg_release}
+				_zfs_ac_meta_type="dpkg-parsechangelog"
+			fi
+		elif test ! -f ".nogitrelease" && git rev-parse --git-dir > /dev/null 2>&1; then
+ 			_match="${ZFS_META_NAME}-${ZFS_META_VERSION}"
+ 			_alias=$(git describe --match=${_match} 2>/dev/null)
+ 			_release=$(echo ${_alias}|cut -f3- -d'-'|sed 's/-/_/g')
@@ -0,0 +1,36 @@
+From: Debian ZFS on Linux maintainers
+ <pkg-zfsonlinux-devel@alioth-lists.debian.net>
+Date: Wed, 30 Jan 2019 15:12:04 +0100
+Subject: Add-libuutil-to-LIBADD-for-libzfs-and-libzfs_core
+
+---
+ lib/libzfs/Makefile.am      | 1 +
+ lib/libzfs_core/Makefile.am | 3 ++-
+ 2 files changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/lib/libzfs/Makefile.am b/lib/libzfs/Makefile.am
+index f1260ea..5b07b9d 100644
+--- a/lib/libzfs/Makefile.am
+++ b/lib/libzfs/Makefile.am
+@@ -31,6 +31,7 @@ nodist_libzfs_la_SOURCES = \
+ 
+ libzfs_la_LIBADD = \
+ 	$(top_builddir)/lib/libzfs_core/libzfs_core.la \
+	$(top_builddir)/lib/libuutil/libuutil.la \
+ 	$(top_builddir)/lib/libshare/libshare.la \
+ 	$(top_builddir)/lib/libnvpair/libnvpair.la \
+ 	$(top_builddir)/lib/libzpool/libzpool.la
+diff --git a/lib/libzfs_core/Makefile.am b/lib/libzfs_core/Makefile.am
+index 5eafc25..10d6de3 100644
+--- a/lib/libzfs_core/Makefile.am
+++ b/lib/libzfs_core/Makefile.am
+@@ -16,7 +16,8 @@ nodist_libzfs_core_la_SOURCES = \
+ 	$(KERNEL_C)
+ 
+ libzfs_core_la_LIBADD = \
+-	$(top_builddir)/lib/libnvpair/libnvpair.la
+	$(top_builddir)/lib/libnvpair/libnvpair.la \
+	$(top_builddir)/lib/libuutil/libuutil.la
+ 
+ libzfs_core_la_LDFLAGS = -version-info 1:0:0
+ 
@@ -0,0 +1,59 @@
+From: =?utf-8?q?Fabian_Gr=C3=BCnbichler?= <f.gruenbichler@proxmox.com>
+Date: Mon, 4 Sep 2017 10:59:32 +0200
+Subject: add man page reference to systemd units
+MIME-Version: 1.0
+Content-Type: text/plain; charset="utf-8"
+Content-Transfer-Encoding: 8bit
+
+Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
+---
+ etc/systemd/system/zfs-import-cache.service.in | 1 +
+ etc/systemd/system/zfs-import-scan.service.in  | 1 +
+ etc/systemd/system/zfs-mount.service.in        | 1 +
+ etc/systemd/system/zfs-share.service.in        | 1 +
+ 4 files changed, 4 insertions(+)
+
+diff --git a/etc/systemd/system/zfs-import-cache.service.in b/etc/systemd/system/zfs-import-cache.service.in
+index 726c468..d5b4043 100644
+--- a/etc/systemd/system/zfs-import-cache.service.in
+++ b/etc/systemd/system/zfs-import-cache.service.in
+@@ -1,5 +1,6 @@
+ [Unit]
+ Description=Import ZFS pools by cache file
+Documentation=man:zpool(8)
+ DefaultDependencies=no
+ Requires=systemd-udev-settle.service
+ After=systemd-udev-settle.service
+diff --git a/etc/systemd/system/zfs-import-scan.service.in b/etc/systemd/system/zfs-import-scan.service.in
+index abc8e8e..fd66505 100644
+--- a/etc/systemd/system/zfs-import-scan.service.in
+++ b/etc/systemd/system/zfs-import-scan.service.in
+@@ -1,5 +1,6 @@
+ [Unit]
+ Description=Import ZFS pools by device scanning
+Documentation=man:zpool(8)
+ DefaultDependencies=no
+ Requires=systemd-udev-settle.service
+ After=systemd-udev-settle.service
+diff --git a/etc/systemd/system/zfs-mount.service.in b/etc/systemd/system/zfs-mount.service.in
+index 728fc63..8a73716 100644
+--- a/etc/systemd/system/zfs-mount.service.in
+++ b/etc/systemd/system/zfs-mount.service.in
+@@ -1,5 +1,6 @@
+ [Unit]
+ Description=Mount ZFS filesystems
+Documentation=man:zfs(8)
+ DefaultDependencies=no
+ After=systemd-udev-settle.service
+ After=zfs-import.target
+diff --git a/etc/systemd/system/zfs-share.service.in b/etc/systemd/system/zfs-share.service.in
+index 494f5cb..d0c93a3 100644
+--- a/etc/systemd/system/zfs-share.service.in
+++ b/etc/systemd/system/zfs-share.service.in
+@@ -1,5 +1,6 @@
+ [Unit]
+ Description=ZFS file system shares
+Documentation=man:zfs(8)
+ After=nfs-server.service nfs-kernel-server.service
+ After=smb.service
+ After=zfs-mount.service
@@ -0,0 +1,27 @@
+From: =?utf-8?q?Fabian_Gr=C3=BCnbichler?= <f.gruenbichler@proxmox.com>
+Date: Fri, 19 Jan 2018 12:13:46 +0100
+Subject: always load ZFS module on boot
+MIME-Version: 1.0
+Content-Type: text/plain; charset="utf-8"
+Content-Transfer-Encoding: 8bit
+
+since zfs-import-scan.service is disabled by default, and
+zfs-import-cache.service only gets started if a cache file exists, this
+is needed for zfs-mount, zfs-share and zfs-zed services in case ZFS is
+not actually used.
+
+Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
+Signed-off-by: Stoiko Ivanov <s.ivanov@proxmox.com>
+---
+ etc/modules-load.d/zfs.conf.in | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/etc/modules-load.d/zfs.conf.in b/etc/modules-load.d/zfs.conf.in
+index 8b41baa..59b058c 100644
+--- a/etc/modules-load.d/zfs.conf.in
+++ b/etc/modules-load.d/zfs.conf.in
+@@ -1,3 +1,3 @@
+ # Always load kernel modules at boot.  The default behavior is to load the
+ # kernel modules in the zfs-import-*.service or when blkid(8) detects a pool.
+-#zfs
+zfs
@@ -0,0 +1,37 @@
+From: =?utf-8?q?Fabian_Gr=C3=BCnbichler?= <f.gruenbichler@proxmox.com>
+Date: Thu, 12 Oct 2017 08:57:48 +0200
+Subject: fix install path of zpool.d scripts
+MIME-Version: 1.0
+Content-Type: text/plain; charset="utf-8"
+Content-Transfer-Encoding: 8bit
+
+Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
+---
+ cmd/zpool/Makefile.am | 6 +++---
+ 1 file changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/cmd/zpool/Makefile.am b/cmd/zpool/Makefile.am
+index d07f8d6..5d26f32 100644
+--- a/cmd/zpool/Makefile.am
+++ b/cmd/zpool/Makefile.am
+@@ -22,11 +22,11 @@ zpool_LDADD = \
+ 	-lm $(LIBBLKID)
+ 
+ zpoolconfdir = $(sysconfdir)/zfs/zpool.d
+-zpoolexecdir = $(libexecdir)/zfs/zpool.d
+zpoollibdir = /usr/lib/zfs-linux/zpool.d
+ 
+ EXTRA_DIST = zpool.d/README
+ 
+-dist_zpoolexec_SCRIPTS = \
+dist_zpoollib_SCRIPTS = \
+ 	zpool.d/enc \
+ 	zpool.d/encdev \
+ 	zpool.d/fault_led \
+@@ -119,5 +119,5 @@ install-data-hook:
+ 	for f in $(zpoolconfdefaults); do \
+ 	  test -f "$(DESTDIR)$(zpoolconfdir)/$${f}" -o \
+ 	       -L "$(DESTDIR)$(zpoolconfdir)/$${f}" || \
+-	    ln -s "$(zpoolexecdir)/$${f}" "$(DESTDIR)$(zpoolconfdir)"; \
+	    ln -s "$(zpoollibdir)/$${f}" "$(DESTDIR)$(zpoolconfdir)"; \
+ 	done
@@ -0,0 +1,40 @@
+From: Colin Ian King <colin.king@canonical.com>
+Date: Mon, 17 Oct 2016 14:30:56 +0800
+Subject: Use python3 for arcstat.py, arc_summary.py & dbufstat.py
+
+---
+ cmd/arc_summary/arc_summary.py | 2 +-
+ cmd/arcstat/arcstat.py         | 2 +-
+ cmd/dbufstat/dbufstat.py       | 2 +-
+ 3 files changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/cmd/arc_summary/arc_summary.py b/cmd/arc_summary/arc_summary.py
+index f6dbb9b..723c2e5 100755
+--- a/cmd/arc_summary/arc_summary.py
+++ b/cmd/arc_summary/arc_summary.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/python
+#!/usr/bin/python3
+ #
+ # $Id: arc_summary.pl,v 388:e27800740aa2 2011-07-08 02:53:29Z jhell $
+ #
+diff --git a/cmd/arcstat/arcstat.py b/cmd/arcstat/arcstat.py
+index d7d3e9b..3a7a47d 100755
+--- a/cmd/arcstat/arcstat.py
+++ b/cmd/arcstat/arcstat.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/python
+#!/usr/bin/python3
+ #
+ # Print out ZFS ARC Statistics exported via kstat(1)
+ # For a definition of fields, or usage, use arctstat.pl -v
+diff --git a/cmd/dbufstat/dbufstat.py b/cmd/dbufstat/dbufstat.py
+index 42bb0c7..73e02ca 100755
+--- a/cmd/dbufstat/dbufstat.py
+++ b/cmd/dbufstat/dbufstat.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/python
+#!/usr/bin/python3
+ #
+ # Print out statistics for all cached dmu buffers.  This information
+ # is available through the dbufs kstat and may be post-processed as
@@ -0,0 +1,24 @@
+From: =?utf-8?q?Fabian_Gr=C3=BCnbichler?= <f.gruenbichler@proxmox.com>
+Date: Mon, 6 Feb 2017 12:04:35 +0100
+Subject: Fix the path to the zed binary on the systemd unit.
+
+We install zed into /usr/sbin manually meanwhile the upstream default is
+installing it into /sbin. Ubuntu packages also install zed to /usr/sbin, but
+they ship their own zfs-zed unit.
+---
+ etc/systemd/system/zfs-zed.service.in | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/etc/systemd/system/zfs-zed.service.in b/etc/systemd/system/zfs-zed.service.in
+index e3dec3d..0b85f16 100644
+--- a/etc/systemd/system/zfs-zed.service.in
+++ b/etc/systemd/system/zfs-zed.service.in
+@@ -5,7 +5,7 @@ After=zfs-import-cache.service
+ After=zfs-import-scan.service
+ 
+ [Service]
+-ExecStart=@sbindir@/zed -F
+ExecStart=/usr/sbin/zed -F
+ Restart=on-abort
+ 
+ [Install]
@@ -0,0 +1,74 @@
+From: Colin Ian King <colin.king@canonical.com>
+Date: Tue, 31 Oct 2017 19:12:42 +0800
+Subject: increase-default-zcmd-allocation-to-256K
+
+Increase default zcmd allocation to 256K (LP: #567557)
+
+When creating hundreds of clones (for example using containers with
+LXD) cloning slows down as the number of clones increases over time.
+The reason for this is that the fetching of the clone information
+using a small zcmd buffer requires two ioctl calls, one to determine
+the size and a second to return the data. However, this requires
+gathering the data twice, once to determine the size and again to
+populate the zcmd buffer to return it to userspace.
+
+These are expensive ioctl() calls, so instead, make the default buffer
+size much larger: 256K. This may sound large, but on 64 bit systems
+running ZFS this is not a huge chunk of memory for the speed
+improvement we gains for large sets of clones:
+
+        16K zcmd        256K zcmd
+Clones	Time    Clones  Time    Clone   % improvement
+        (secs) 	per sec (secs)  per sec
+100	7	14.29	5	20.00	28.57
+200	10	20.00	9	22.22	10.00
+300	19	15.79	18	16.67	5.26
+400	22	18.18	22	18.18	0.00
+500	29	17.24	29	17.24	0.00
+600	39	15.38	39	15.38	0.00
+700	46	15.22	45	15.56	2.17
+800	58	13.79	51	15.69	12.07
+900	74	12.16	61	14.75	17.57
+1000	90	11.11	74	13.51	17.78
+1100	98	11.22	87	12.64	11.22
+1200	102	11.76	95	12.63	6.86
+1300	113	11.50	104	12.50	7.96
+1400	143	9.79	109	12.84	23.78
+1500	145	10.34	132	11.36	8.97
+1600	165	9.70	145	11.03	12.12
+1700	187	9.09	156	10.90	16.58
+1800	210	8.57	166	10.84	20.95
+1900	226	8.41	183	10.38	19.03
+2000	256	7.81	198	10.10	22.66
+2200	311	7.07	238	9.24	23.47
+2400	373	6.43	271	8.86	27.35
+2600	487	5.34	316	8.23	35.11
+3000	619	4.85	426	7.04	31.18
+3400	915	3.72	549	6.19	40.00
+4000	1332	3.00	923	4.33	30.71
+
+As one can see, with > 2000 clones we get 25-40% speed
+improvement.
+
+This patch was originally suggested by Brian Behlendorf
+(see https://github.com/zfsonlinux/zfs/issues/6372), however
+this fix is a more generic fix to cover all zcmd cases.
+
+Signed-off-by: Colin Ian King <colin.king@canonical.com>
+---
+ lib/libzfs/libzfs_util.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/lib/libzfs/libzfs_util.c b/lib/libzfs/libzfs_util.c
+index bc51a76..8580415 100644
+--- a/lib/libzfs/libzfs_util.c
+++ b/lib/libzfs/libzfs_util.c
+@@ -1354,7 +1354,7 @@ int
+ zcmd_alloc_dst_nvlist(libzfs_handle_t *hdl, zfs_cmd_t *zc, size_t len)
+ {
+ 	if (len == 0)
+-		len = 16 * 1024;
+		len = 256 * 1024;
+ 	zc->zc_nvlist_dst_size = len;
+ 	zc->zc_nvlist_dst =
+ 	    (uint64_t)(uintptr_t)zfs_alloc(hdl, zc->zc_nvlist_dst_size);
@@ -0,0 +1,26 @@
+From: =?utf-8?q?Fabian_Gr=C3=BCnbichler?= <f.gruenbichler@proxmox.com>
+Date: Mon, 24 Oct 2016 13:47:06 +0200
+Subject: import with -d /dev/disk/by-id in scan service
+MIME-Version: 1.0
+Content-Type: text/plain; charset="utf-8"
+Content-Transfer-Encoding: 8bit
+
+Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
+Signed-off-by: Stoiko Ivanov <s.ivanov@proxmox.com>
+---
+ etc/systemd/system/zfs-import-scan.service.in | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/etc/systemd/system/zfs-import-scan.service.in b/etc/systemd/system/zfs-import-scan.service.in
+index fd66505..5cbfec8 100644
+--- a/etc/systemd/system/zfs-import-scan.service.in
+++ b/etc/systemd/system/zfs-import-scan.service.in
+@@ -13,7 +13,7 @@ ConditionPathExists=!@sysconfdir@/zfs/zpool.cache
+ Type=oneshot
+ RemainAfterExit=yes
+ ExecStartPre=-/sbin/modprobe zfs
+-ExecStart=@sbindir@/zpool import -aN -o cachefile=none
+ExecStart=@sbindir@/zpool import -aN -d /dev/disk/by-id -o cachefile=none
+ 
+ [Install]
+ WantedBy=zfs-import.target
@@ -0,0 +1,60 @@
+From: Rohan Puri <rohan.puri15@gmail.com>
+Date: Sat, 28 Jul 2018 18:32:12 +0530
+Subject: Fix deadlock between zfs umount & snapentry_expire
+
+zfs umount -> zfsctl_destroy() takes the zfs_snapshot_lock as a
+writer and calls zfsctl_snapshot_unmount_cancel(), which waits
+for snapentry_expire() if present (when snap is automounted).
+This snapentry_expire() itself then waits for zfs_snapshot_lock
+as a reader, resulting in a deadlock.
+
+The fix is to only hold the zfs_snapshot_lock over the tree
+lookup and removal.  After a successful lookup the lock can
+be dropped and zfs_snapentry_t will remain valid until the
+reference taken by the lookup is released.
+
+Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
+Signed-off-by: Rohan Puri <rohan.puri15@gmail.com>
+Closes #7751
+Closes #7752
+
+(Cherry-picked from fd7265c646f40e364396af5014bbb83e809e124a)
+Signed-off-by: Stoiko Ivanov <s.ivanov@proxmox.com>
+
+Signed-off-by: Stoiko Ivanov <s.ivanov@proxmox.com>
+---
+ module/zfs/zfs_ctldir.c | 11 +++++------
+ 1 file changed, 5 insertions(+), 6 deletions(-)
+
+diff --git a/module/zfs/zfs_ctldir.c b/module/zfs/zfs_ctldir.c
+index bf5a1d0..2964b65 100644
+--- a/module/zfs/zfs_ctldir.c
+++ b/module/zfs/zfs_ctldir.c
+@@ -358,8 +358,6 @@ snapentry_expire(void *data)
+ static void
+ zfsctl_snapshot_unmount_cancel(zfs_snapentry_t *se)
+ {
+-	ASSERT(RW_LOCK_HELD(&zfs_snapshot_lock));
+-
+ 	if (taskq_cancel_id(system_delay_taskq, se->se_taskqid) == 0) {
+ 		se->se_taskqid = TASKQID_INVALID;
+ 		zfsctl_snapshot_rele(se);
+@@ -570,13 +568,14 @@ zfsctl_destroy(zfsvfs_t *zfsvfs)
+ 		uint64_t objsetid = dmu_objset_id(zfsvfs->z_os);
+ 
+ 		rw_enter(&zfs_snapshot_lock, RW_WRITER);
+-		if ((se = zfsctl_snapshot_find_by_objsetid(spa, objsetid))
+-		    != NULL) {
+-			zfsctl_snapshot_unmount_cancel(se);
+		se = zfsctl_snapshot_find_by_objsetid(spa, objsetid);
+		if (se != NULL)
+ 			zfsctl_snapshot_remove(se);
+		rw_exit(&zfs_snapshot_lock);
+		if (se != NULL) {
+			zfsctl_snapshot_unmount_cancel(se);
+ 			zfsctl_snapshot_rele(se);
+ 		}
+-		rw_exit(&zfs_snapshot_lock);
+ 	} else if (zfsvfs->z_ctldir) {
+ 		iput(zfsvfs->z_ctldir);
+ 		zfsvfs->z_ctldir = NULL;
@@ -0,0 +1,374 @@
+From: ilbsmart <wgqimut@gmail.com>
+Date: Wed, 17 Oct 2018 02:11:24 +0800
+Subject: deadlock between mm_sem and tx assign in zfs_write() and page fault
+
+The bug time sequence:
+1. thread #1, `zfs_write` assign a txg "n".
+2. In a same process, thread #2, mmap page fault (which means the
+   `mm_sem` is hold) occurred, `zfs_dirty_inode` open a txg failed,
+   and wait previous txg "n" completed.
+3. thread #1 call `uiomove` to write, however page fault is occurred
+   in `uiomove`, which means it need `mm_sem`, but `mm_sem` is hold by
+   thread #2, so it stuck and can't complete,  then txg "n" will
+   not complete.
+
+So thread #1 and thread #2 are deadlocked.
+
+Reviewed-by: Chunwei Chen <tuxoko@gmail.com>
+Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
+Reviewed-by: Matthew Ahrens <mahrens@delphix.com>
+Signed-off-by: Grady Wong <grady.w@xtaotech.com>
+Closes #7939
+
+(backported from: zfs-upstream 779a6c0bf6df76e0dd92c1ccf81f48512b835bb0)
+Signed-off-by: Stoiko Ivanov <s.ivanov@proxmox.com>
+---
+ include/sys/uio_impl.h                             |   2 +-
+ module/zcommon/zfs_uio.c                           |  31 ++++-
+ module/zfs/zfs_vnops.c                             |  24 +++-
+ tests/zfs-tests/cmd/mmapwrite/mmapwrite.c          | 140 +++++++++++++++------
+ .../tests/functional/mmap/mmap_write_001_pos.ksh   |   8 +-
+ 5 files changed, 151 insertions(+), 54 deletions(-)
+
+diff --git a/include/sys/uio_impl.h b/include/sys/uio_impl.h
+index 37e283d..cfef0b9 100644
+--- a/include/sys/uio_impl.h
+++ b/include/sys/uio_impl.h
+@@ -42,7 +42,7 @@
+ #include <sys/uio.h>
+ 
+ extern int uiomove(void *, size_t, enum uio_rw, uio_t *);
+-extern void uio_prefaultpages(ssize_t, uio_t *);
+extern int uio_prefaultpages(ssize_t, uio_t *);
+ extern int uiocopy(void *, size_t, enum uio_rw, uio_t *, size_t *);
+ extern void uioskip(uio_t *, size_t);
+ 
+diff --git a/module/zcommon/zfs_uio.c b/module/zcommon/zfs_uio.c
+index 7b4175b..8e969bb 100644
+--- a/module/zcommon/zfs_uio.c
+++ b/module/zcommon/zfs_uio.c
+@@ -50,6 +50,7 @@
+ #include <sys/types.h>
+ #include <sys/uio_impl.h>
+ #include <linux/kmap_compat.h>
+#include <linux/uaccess.h>
+ 
+ /*
+  * Move "n" bytes at byte address "p"; "rw" indicates the direction
+@@ -77,8 +78,24 @@ uiomove_iov(void *p, size_t n, enum uio_rw rw, struct uio *uio)
+ 				if (copy_to_user(iov->iov_base+skip, p, cnt))
+ 					return (EFAULT);
+ 			} else {
+-				if (copy_from_user(p, iov->iov_base+skip, cnt))
+-					return (EFAULT);
+				if (uio->uio_fault_disable) {
+					if (!access_ok(VERIFY_READ,
+					    (iov->iov_base + skip), cnt)) {
+						return (EFAULT);
+					}
+
+					pagefault_disable();
+					if (__copy_from_user_inatomic(p,
+					    (iov->iov_base + skip), cnt)) {
+						pagefault_enable();
+						return (EFAULT);
+					}
+					pagefault_enable();
+				} else {
+					if (copy_from_user(p,
+					    (iov->iov_base + skip), cnt))
+						return (EFAULT);
+				}
+ 			}
+ 			break;
+ 		case UIO_SYSSPACE:
+@@ -156,7 +173,7 @@ EXPORT_SYMBOL(uiomove);
+  * error will terminate the process as this is only a best attempt to get
+  * the pages resident.
+  */
+-void
+int
+ uio_prefaultpages(ssize_t n, struct uio *uio)
+ {
+ 	const struct iovec *iov;
+@@ -170,7 +187,7 @@ uio_prefaultpages(ssize_t n, struct uio *uio)
+ 	switch (uio->uio_segflg) {
+ 		case UIO_SYSSPACE:
+ 		case UIO_BVEC:
+-			return;
+			return (0);
+ 		case UIO_USERSPACE:
+ 		case UIO_USERISPACE:
+ 			break;
+@@ -194,7 +211,7 @@ uio_prefaultpages(ssize_t n, struct uio *uio)
+ 		p = iov->iov_base + skip;
+ 		while (cnt) {
+ 			if (fuword8((uint8_t *)p, &tmp))
+-				return;
+				return (EFAULT);
+ 			incr = MIN(cnt, PAGESIZE);
+ 			p += incr;
+ 			cnt -= incr;
+@@ -204,8 +221,10 @@ uio_prefaultpages(ssize_t n, struct uio *uio)
+ 		 */
+ 		p--;
+ 		if (fuword8((uint8_t *)p, &tmp))
+-			return;
+			return (EFAULT);
+ 	}
+
+	return (0);
+ }
+ EXPORT_SYMBOL(uio_prefaultpages);
+ 
+diff --git a/module/zfs/zfs_vnops.c b/module/zfs/zfs_vnops.c
+index 5a2e55e..c866352 100644
+--- a/module/zfs/zfs_vnops.c
+++ b/module/zfs/zfs_vnops.c
+@@ -675,7 +675,10 @@ zfs_write(struct inode *ip, uio_t *uio, int ioflag, cred_t *cr)
+ 		xuio = (xuio_t *)uio;
+ 	else
+ #endif
+-		uio_prefaultpages(MIN(n, max_blksz), uio);
+		if (uio_prefaultpages(MIN(n, max_blksz), uio)) {
+			ZFS_EXIT(zfsvfs);
+			return (SET_ERROR(EFAULT));
+		}
+ 
+ 	/*
+ 	 * If in append mode, set the io offset pointer to eof.
+@@ -820,8 +823,19 @@ zfs_write(struct inode *ip, uio_t *uio, int ioflag, cred_t *cr)
+ 
+ 		if (abuf == NULL) {
+ 			tx_bytes = uio->uio_resid;
+			uio->uio_fault_disable = B_TRUE;
+ 			error = dmu_write_uio_dbuf(sa_get_db(zp->z_sa_hdl),
+ 			    uio, nbytes, tx);
+			if (error == EFAULT) {
+				dmu_tx_commit(tx);
+				if (uio_prefaultpages(MIN(n, max_blksz), uio)) {
+					break;
+				}
+				continue;
+			} else if (error != 0) {
+				dmu_tx_commit(tx);
+				break;
+			}
+ 			tx_bytes -= uio->uio_resid;
+ 		} else {
+ 			tx_bytes = nbytes;
+@@ -921,8 +935,12 @@ zfs_write(struct inode *ip, uio_t *uio, int ioflag, cred_t *cr)
+ 		ASSERT(tx_bytes == nbytes);
+ 		n -= nbytes;
+ 
+-		if (!xuio && n > 0)
+-			uio_prefaultpages(MIN(n, max_blksz), uio);
+		if (!xuio && n > 0) {
+			if (uio_prefaultpages(MIN(n, max_blksz), uio)) {
+				error = EFAULT;
+				break;
+			}
+		}
+ 	}
+ 
+ 	zfs_inode_update(zp);
+diff --git a/tests/zfs-tests/cmd/mmapwrite/mmapwrite.c b/tests/zfs-tests/cmd/mmapwrite/mmapwrite.c
+index 190d31a..b9915d5 100644
+--- a/tests/zfs-tests/cmd/mmapwrite/mmapwrite.c
+++ b/tests/zfs-tests/cmd/mmapwrite/mmapwrite.c
+@@ -31,74 +31,132 @@
+ #include <string.h>
+ #include <sys/mman.h>
+ #include <pthread.h>
+#include <errno.h>
+#include <err.h>
+ 
+ /*
+  * --------------------------------------------------------------------
+- * Bug Id: 5032643
+ * Bug Issue Id: #7512
+ * The bug time sequence:
+ * 1. context #1, zfs_write assign a txg "n".
+ * 2. In the same process, context #2, mmap page fault (which means the mm_sem
+ *    is hold) occurred, zfs_dirty_inode open a txg failed, and wait previous
+ *    txg "n" completed.
+ * 3. context #1 call uiomove to write, however page fault is occurred in
+ *    uiomove, which means it need mm_sem, but mm_sem is hold by
+ *    context #2, so it stuck and can't complete, then txg "n" will not
+ *    complete.
+  *
+- * Simply writing to a file and mmaping that file at the same time can
+- * result in deadlock.  Nothing perverse like writing from the file's
+- * own mapping is required.
+ * So context #1 and context #2 trap into the "dead lock".
+  * --------------------------------------------------------------------
+  */
+ 
+#define	NORMAL_WRITE_TH_NUM	2
+
+ static void *
+-mapper(void *fdp)
+normal_writer(void *filename)
+ {
+-	void *addr;
+-	int fd = *(int *)fdp;
+	char *file_path = filename;
+	int fd = -1;
+	ssize_t write_num = 0;
+	int page_size = getpagesize();
+ 
+-	if ((addr =
+-	    mmap(0, 8192, PROT_READ, MAP_SHARED, fd, 0)) == MAP_FAILED) {
+-		perror("mmap");
+-		exit(1);
+	fd = open(file_path, O_RDWR | O_CREAT, 0777);
+	if (fd == -1) {
+		err(1, "failed to open %s", file_path);
+ 	}
+-	for (;;) {
+-		if (mmap(addr, 8192, PROT_READ,
+-		    MAP_SHARED|MAP_FIXED, fd, 0) == MAP_FAILED) {
+-			perror("mmap");
+-			exit(1);
+
+	char *buf = malloc(1);
+	while (1) {
+		write_num = write(fd, buf, 1);
+		if (write_num == 0) {
+			err(1, "write failed!");
+			break;
+ 		}
+		lseek(fd, page_size, SEEK_CUR);
+	}
+
+	if (buf) {
+		free(buf);
+ 	}
+-	/* NOTREACHED */
+-	return ((void *)1);
+ }
+ 
+-int
+-main(int argc, char **argv)
+static void *
+map_writer(void *filename)
+ {
+-	int fd;
+-	char buf[1024];
+-	pthread_t tid;
+	int fd = -1;
+	int ret = 0;
+	char *buf = NULL;
+	int page_size = getpagesize();
+	int op_errno = 0;
+	char *file_path = filename;
+ 
+-	memset(buf, 'a', sizeof (buf));
+	while (1) {
+		ret = access(file_path, F_OK);
+		if (ret) {
+			op_errno = errno;
+			if (op_errno == ENOENT) {
+				fd = open(file_path, O_RDWR | O_CREAT, 0777);
+				if (fd == -1) {
+					err(1, "open file failed");
+				}
+ 
+-	if (argc != 2) {
+-		(void) printf("usage: %s <file name>\n", argv[0]);
+-		exit(1);
+-	}
+				ret = ftruncate(fd, page_size);
+				if (ret == -1) {
+					err(1, "truncate file failed");
+				}
+			} else {
+				err(1, "access file failed!");
+			}
+		} else {
+			fd = open(file_path, O_RDWR, 0777);
+			if (fd == -1) {
+				err(1, "open file failed");
+			}
+		}
+ 
+-	if ((fd = open(argv[1], O_RDWR|O_CREAT|O_TRUNC, 0666)) == -1) {
+-		perror("open");
+-		exit(1);
+		if ((buf = mmap(NULL, page_size, PROT_READ | PROT_WRITE,
+		    MAP_SHARED, fd, 0)) == MAP_FAILED) {
+			err(1, "map file failed");
+		}
+
+		if (fd != -1)
+			close(fd);
+
+		char s[10] = {0, };
+		memcpy(buf, s, 10);
+		ret = munmap(buf, page_size);
+		if (ret != 0) {
+			err(1, "unmap file failed");
+		}
+ 	}
+}
+ 
+-	(void) pthread_setconcurrency(2);
+-	if (pthread_create(&tid, NULL, mapper, &fd) != 0) {
+-		perror("pthread_create");
+-		close(fd);
+int
+main(int argc, char **argv)
+{
+	pthread_t map_write_tid;
+	pthread_t normal_write_tid[NORMAL_WRITE_TH_NUM];
+	int i = 0;
+
+	if (argc != 3) {
+		(void) printf("usage: %s <normal write file name>"
+		    "<map write file name>\n", argv[0]);
+ 		exit(1);
+ 	}
+-	for (;;) {
+-		if (write(fd, buf, sizeof (buf)) == -1) {
+-			perror("write");
+-			close(fd);
+-			exit(1);
+
+	for (i = 0; i < NORMAL_WRITE_TH_NUM; i++) {
+		if (pthread_create(&normal_write_tid[i], NULL, normal_writer,
+		    argv[1])) {
+			err(1, "pthread_create normal_writer failed.");
+ 		}
+ 	}
+ 
+-	close(fd);
+	if (pthread_create(&map_write_tid, NULL, map_writer, argv[2])) {
+		err(1, "pthread_create map_writer failed.");
+	}
+ 
+ 	/* NOTREACHED */
+	pthread_join(map_write_tid, NULL);
+ 	return (0);
+ }
+diff --git a/tests/zfs-tests/tests/functional/mmap/mmap_write_001_pos.ksh b/tests/zfs-tests/tests/functional/mmap/mmap_write_001_pos.ksh
+index 1eda971..24150b8 100755
+--- a/tests/zfs-tests/tests/functional/mmap/mmap_write_001_pos.ksh
+++ b/tests/zfs-tests/tests/functional/mmap/mmap_write_001_pos.ksh
+@@ -53,12 +53,14 @@ if ! is_mp; then
+ fi
+ 
+ log_must chmod 777 $TESTDIR
+-mmapwrite $TESTDIR/test-write-file &
+mmapwrite $TESTDIR/normal_write_file $TESTDIR/map_write_file &
+ PID_MMAPWRITE=$!
+-log_note "mmapwrite $TESTDIR/test-write-file pid: $PID_MMAPWRITE"
+log_note "mmapwrite $TESTDIR/normal_write_file $TESTDIR/map_write_file"\
+	 "pid: $PID_MMAPWRITE"
+ log_must sleep 30
+ 
+ log_must kill -9 $PID_MMAPWRITE
+-log_must ls -l $TESTDIR/test-write-file
+log_must ls -l $TESTDIR/normal_write_file
+log_must ls -l $TESTDIR/map_write_file
+ 
+ log_pass "write(2) a mmap(2)'ing file succeeded."
@@ -0,0 +1,33 @@
+From: Richard Laager <rlaager@wiktel.com>
+Date: Wed, 30 Jan 2019 15:12:04 +0100
+Subject: Enable zed emails
+
+The OpenZFS event daemon monitors pools. This patch enables the email sending
+function by default (if zed is installed). This is consistent with the default
+behavior of mdadm.
+---
+ cmd/zed/zed.d/zed.rc | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/cmd/zed/zed.d/zed.rc b/cmd/zed/zed.d/zed.rc
+index 35a4d12..c6c106b 100644
+--- a/cmd/zed/zed.d/zed.rc
+++ b/cmd/zed/zed.d/zed.rc
+@@ -15,7 +15,7 @@
+ # Email will only be sent if ZED_EMAIL_ADDR is defined.
+ # Disabled by default; uncomment to enable.
+ #
+-#ZED_EMAIL_ADDR="root"
+ZED_EMAIL_ADDR="root"
+ 
+ ##
+ # Name or path of executable responsible for sending notifications via email;
+@@ -41,7 +41,7 @@
+ ##
+ # Minimum number of seconds between notifications for a similar event.
+ #
+-#ZED_NOTIFY_INTERVAL_SECS=3600
+ZED_NOTIFY_INTERVAL_SECS=3600
+ 
+ ##
+ # Notification verbosity.
@@ -0,0 +1,12 @@
+0001-Check-for-META-and-DCH-consistency-in-autoconf.patch
+0002-Add-libuutil-to-LIBADD-for-libzfs-and-libzfs_core.patch
+0003-add-man-page-reference-to-systemd-units.patch
+0004-always-load-ZFS-module-on-boot.patch
+0005-fix-install-path-of-zpool.d-scripts.patch
+0006-cmd-python-exec-path.patch
+0007-zed-service-bindir.patch
+0008-increase-default-zcmd-allocation-to-256K.patch
+0009-import-with-d-dev-disk-by-id-in-scan-service.patch
+0010-Fix-deadlock-between-zfs-umount-snapentry_expire.patch
+0011-deadlock-between-mm_sem-and-tx-assign-in-zfs_write-a.patch
+0012-enable-zed.patch