2:52 a.m.
Signed-off-by: Cao jin <caoj.fnst(a)cn.fujitsu.com>
---
daemon/btrfs.c | 37 ++++++++++++++++++
generator/actions.ml | 16 ++++++++
tests/btrfs/Makefile.am | 3 +-
tests/btrfs/test-btrfs-replace.sh | 82 +++++++++++++++++++++++++++++++++++++++
4 files changed, 137 insertions(+), 1 deletion(-)
create mode 100755 tests/btrfs/test-btrfs-replace.sh
diff --git a/daemon/btrfs.c b/daemon/btrfs.c
index 39392f7..eba336b 100644
--- a/daemon/btrfs.c
+++ b/daemon/btrfs.c
@@ -2083,3 +2083,40 @@ do_btrfs_image (char *const *sources, const char *image,
return 0;
}
+
+int
+do_btrfs_replace (const char *srcdev, const char *targetdev,
+ const char* mntpoint)
+{
+ const size_t MAX_ARGS = 64;
+ const char *argv[MAX_ARGS];
+ size_t i = 0;
+ CLEANUP_FREE char *err = NULL;
+ CLEANUP_FREE char *path_buf = NULL;
+ int r;
+
+ path_buf = sysroot_path (mntpoint);
+ if (path_buf == NULL) {
+ reply_with_perror ("malloc");
+ return -1;
+ }
+
+ ADD_ARG (argv, i, str_btrfs);
+ ADD_ARG (argv, i, "replace");
+ ADD_ARG (argv, i, "start");
+ ADD_ARG (argv, i, srcdev);
+ ADD_ARG (argv, i, targetdev);
+ ADD_ARG (argv, i, path_buf);
+ ADD_ARG (argv, i, "-B");
+ ADD_ARG (argv, i, "-f");
+ ADD_ARG (argv, i, NULL);
+
+ r = commandv (NULL, &err, argv);
+ if (r == -1) {
+ reply_with_error ("%s: %s", mntpoint, err);
+ return -1;
+ }
+
+ return 0;
+}
+
diff --git a/generator/actions.ml b/generator/actions.ml
index 7252295..ffc2bbf 100644
--- a/generator/actions.ml
+++ b/generator/actions.ml
@@ -12593,6 +12593,22 @@ numbered C<partnum> on device C<device>.
It returns C<primary>, C<logical>, or C<extended>." };
+ { defaults with
+ name = "btrfs_replace"; added = (1, 29, 46);
+ style = RErr, [Device "srcdev"; Device "targetdev"; Pathname
"mntpoint"], [];
+ proc_nr = Some 455;
+ optional = Some "btrfs"; camel_name = "BTRFSReplace";
+ test_excuse = "put the test in 'tests/btrfs' directory";
+ shortdesc = "replace a btrfs managed device with another device";
+ longdesc = "\
+Replace device of a btrfs filesystem. On a live filesystem, duplicate the data
+to the target device which is currently stored on the source device.
+After completion of the operation, the source device is wiped out and
+removed from the filesystem.
+
+The <targetdev> needs to be same size or larger than the <srcdev>. Devices
+which are currently mounted are never allowed to be used as the <targetdev>."
};
+
]
(* Non-API meta-commands available only in guestfish.
diff --git a/tests/btrfs/Makefile.am b/tests/btrfs/Makefile.am
index bf4d7ae..b6ef794 100644
--- a/tests/btrfs/Makefile.am
+++ b/tests/btrfs/Makefile.am
@@ -20,7 +20,8 @@ include $(top_srcdir)/subdir-rules.mk
TESTS = \
test-btrfs-misc.pl \
test-btrfs-devices.sh \
- test-btrfs-subvolume-default.pl
+ test-btrfs-subvolume-default.pl \
+ test-btrfs-replace.sh
TESTS_ENVIRONMENT = $(top_builddir)/run --test
diff --git a/tests/btrfs/test-btrfs-replace.sh b/tests/btrfs/test-btrfs-replace.sh
new file mode 100755
index 0000000..c095e0b
--- /dev/null
+++ b/tests/btrfs/test-btrfs-replace.sh
@@ -0,0 +1,82 @@
+#!/bin/bash -
+# libguestfs
+# Copyright (C) 2015 Fujitsu Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+# Test btrfs replace devices.
+
+set -e
+
+# Allow the test to be skipped since btrfs is often broken.
+if [ -n "$SKIP_TEST_BTRFS_REPLACE_SH" ]; then
+ echo "$0: skipping test because environment variable is set."
+ exit 77
+fi
+
+# If btrfs is not available, bail.
+if ! guestfish -a /dev/null run : available btrfs; then
+ echo "$0: skipping test because btrfs is not available"
+ exit 77
+fi
+
+rm -f test-btrfs-devices-{1,2}.img replace.output
+
+guestfish <<EOF > replace.output
+# Add 2 empty disks
+sparse test-btrfs-devices-1.img 1G
+sparse test-btrfs-devices-2.img 1G
+run
+
+mkfs-btrfs /dev/sda
+mount /dev/sda /
+
+mkdir /data
+copy-in $srcdir/../data/filesanddirs-10M.tar.xz /data
+
+# now, sda is btrfs while sdb is blank.
+btrfs-replace /dev/sda /dev/sdb /
+
+# after replace: sda is wiped out, while sdb has btrfs with data
+list-filesystems
+
+EOF
+
+if [ "$(cat replace.output)" != "/dev/sda: unknown
+/dev/sdb: btrfs" ]; then
+ echo "btrfs-repalce fail!"
+ cat replace.output
+ exit 1
+fi
+
+rm -f replace.output
+
+#now, we do switch, replace the device back.
+guestfish -a test-btrfs-devices-1.img -a test-btrfs-devices-2.img <<EOF >
replace.output
+run
+mount /dev/sdb /
+btrfs-replace /dev/sdb /dev/sda /
+list-filesystems
+
+EOF
+
+if [ "$(cat replace.output)" != "/dev/sda: btrfs
+/dev/sdb: unknown" ]; then
+ echo "btrfs-repalce back fail!"
+ cat replace.output
+ exit 2
+fi
+
+rm test-btrfs-devices-{1,2}.img replace.output
--
2.1.0