Add the undelete-subvol subcommand for btrfs rescue. This subcommand is
used to recover all deleted subvolume left intact on the device.
Signed-off-by: Lu Fengqi <lufq.f...@cn.fujitsu.com>
---
cmds-rescue.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 47 insertions(+)
diff --git a/cmds-rescue.c b/cmds-rescue.c
index c40088ad374e..17bc1df33a23 100644
--- a/cmds-rescue.c
+++ b/cmds-rescue.c
@@ -25,6 +25,7 @@
#include "disk-io.h"
#include "commands.h"
#include "utils.h"
+#include "undelete-subvol.h"
#include "help.h"
static const char * const rescue_cmd_group_usage[] = {
@@ -248,6 +249,50 @@ out:
return !!ret;
}
+static const char * const cmd_rescue_undelete_subvol_usage[] = {
+ "btrfs rescue undelete-subvol <device>",
+ "Undelete all deleted subvolume that still left intact on the device",
+ "",
+ NULL
+};
+
+static int cmd_rescue_undelete_subvol(int argc, char **argv)
+{
+ struct btrfs_fs_info *fs_info;
+ char *devname;
+ int ret;
+
+ clean_args_no_options(argc, argv, cmd_rescue_undelete_subvol_usage);
+
+ if (check_argc_exact(argc, 2))
+ usage(cmd_rescue_undelete_subvol_usage);
+
+ devname = argv[optind];
+ ret = check_mounted(devname);
+ if (ret < 0) {
+ error("could not check mount status: %s", strerror(-ret));
+ goto out;
+ } else if (ret) {
+ error("%s is currently mounted", devname);
+ ret = -EBUSY;
+ goto out;
+ }
+
+ fs_info = open_ctree_fs_info(devname, 0, 0, 0, OPEN_CTREE_WRITES |
+ OPEN_CTREE_PARTIAL);
+ if (!fs_info) {
+ error("could not open btrfs");
+ ret = -EIO;
+ goto out;
+ }
+
+ ret = btrfs_undelete_intact_subvols(fs_info->tree_root);
+
+ close_ctree(fs_info->tree_root);
+out:
+ return ret;
+}
+
static const char rescue_cmd_group_info[] =
"toolbox for specific rescue operations";
@@ -260,6 +305,8 @@ const struct cmd_group rescue_cmd_group = {
{ "zero-log", cmd_rescue_zero_log, cmd_rescue_zero_log_usage,
NULL, 0},
{ "fix-device-size", cmd_rescue_fix_device_size,
cmd_rescue_fix_device_size_usage, NULL, 0},
+ { "undelete-subvol", cmd_rescue_undelete_subvol,
+ cmd_rescue_undelete_subvol_usage, NULL, 0},
NULL_CMD_STRUCT
}
};
--
2.16.1
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