Copy the functionality of standalone btrfs-zero-log to the main tool.
The standalone utility will be removed later.
Signed-off-by: David Sterba <dste...@suse.cz>
---
cmds-rescue.c | 49 ++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 48 insertions(+), 1 deletion(-)
diff --git a/cmds-rescue.c b/cmds-rescue.c
index f20a2068a16b..d76a879d543a 100644
--- a/cmds-rescue.c
+++ b/cmds-rescue.c
@@ -19,6 +19,9 @@
#include "kerncompat.h"
#include <getopt.h>
+#include "ctree.h"
+#include "transaction.h"
+#include "disk-io.h"
#include "commands.h"
#include "utils.h"
@@ -149,11 +152,55 @@ int cmd_super_recover(int argc, char **argv)
return ret;
}
+const char * const cmd_rescue_zero_log_usage[] = {
+ "btrfs rescue zero-log <device>",
+ "Clear the tree log. Usable if it's corrupted and prevents mount.",
+ "",
+ NULL
+};
+
+int cmd_rescue_zero_log(int argc, char **argv)
+{
+ struct btrfs_root *root;
+ struct btrfs_trans_handle *trans;
+ char *devname;
+ int ret;
+
+ if (check_argc_exact(argc, 2))
+ usage(cmd_rescue_zero_log_usage);
+
+ devname = argv[optind];
+ ret = check_mounted(devname);
+ if (ret < 0) {
+ fprintf(stderr, "Could not check mount status: %s\n",
strerror(-ret));
+ return 1;
+ } else if (ret) {
+ fprintf(stderr, "%s is currently mounted. Aborting.\n",
devname);
+ return 1;
+ }
+
+ root = open_ctree(devname, 0, OPEN_CTREE_WRITES);
+ if (!root) {
+ fprintf(stderr, "Could not open ctree\n");
+ return 1;
+ }
+
+ printf("Clearing log on %s\n", devname);
+ trans = btrfs_start_transaction(root, 1);
+ btrfs_set_super_log_root(root->fs_info->super_copy, 0);
+ btrfs_set_super_log_root_level(root->fs_info->super_copy, 0);
+ btrfs_commit_transaction(trans, root);
+ close_ctree(root);
+
+ return 0;
+}
+
const struct cmd_group rescue_cmd_group = {
rescue_cmd_group_usage, NULL, {
{ "chunk-recover", cmd_chunk_recover, cmd_chunk_recover_usage,
NULL, 0},
{ "super-recover", cmd_super_recover, cmd_super_recover_usage,
NULL, 0},
- { 0, 0, 0, 0, 0 }
+ { "zero-log", cmd_rescue_zero_log, cmd_rescue_zero_log_usage,
NULL, 0},
+ NULL_CMD_STRUCT
}
};
--
1.9.0
--
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