X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=cmds-rescue.c;h=c40088ad374e2e69447a93b05fd0379a083833b8;hb=3491d6277886ddc55643a133d0ebf05a4e0053ed;hp=f20a2068a16bc02ecdaf082f17debbded3ec8db4;hpb=51a40f6df01ea7e0673bd1b50a0d28e1def345f2;p=platform%2Fupstream%2Fbtrfs-progs.git diff --git a/cmds-rescue.c b/cmds-rescue.c index f20a206..c40088a 100644 --- a/cmds-rescue.c +++ b/cmds-rescue.c @@ -19,8 +19,13 @@ #include "kerncompat.h" #include +#include "ctree.h" +#include "volumes.h" +#include "transaction.h" +#include "disk-io.h" #include "commands.h" #include "utils.h" +#include "help.h" static const char * const rescue_cmd_group_usage[] = { "btrfs rescue [options] ", @@ -30,7 +35,7 @@ static const char * const rescue_cmd_group_usage[] = { int btrfs_recover_chunk_tree(char *path, int verbose, int yes); int btrfs_recover_superblocks(char *path, int verbose, int yes); -const char * const cmd_chunk_recover_usage[] = { +static const char * const cmd_rescue_chunk_recover_usage[] = { "btrfs rescue chunk-recover [options] ", "Recover the chunk tree by scanning the devices one by one.", "", @@ -40,16 +45,7 @@ const char * const cmd_chunk_recover_usage[] = { NULL }; -const char * const cmd_super_recover_usage[] = { - "btrfs rescue super-recover [options] ", - "Recover bad superblocks from good copies", - "", - "-y Assume an answer of `yes' to all questions", - "-v Verbose mode", - NULL -}; - -int cmd_chunk_recover(int argc, char *argv[]) +static int cmd_rescue_chunk_recover(int argc, char *argv[]) { int ret = 0; char *file; @@ -69,38 +65,45 @@ int cmd_chunk_recover(int argc, char *argv[]) break; case 'h': default: - usage(cmd_chunk_recover_usage); + usage(cmd_rescue_chunk_recover_usage); } } - argc = argc - optind; - if (argc == 0) - usage(cmd_chunk_recover_usage); + if (check_argc_exact(argc - optind, 1)) + usage(cmd_rescue_chunk_recover_usage); file = argv[optind]; ret = check_mounted(file); if (ret < 0) { - fprintf(stderr, "Could not check mount status: %s\n", - strerror(-ret)); + error("could not check mount status: %s", strerror(-ret)); return 1; } else if (ret) { - fprintf(stderr, "the device is busy\n"); + error("the device is busy"); return 1; } ret = btrfs_recover_chunk_tree(file, verbose, yes); if (!ret) { - fprintf(stdout, "Recover the chunk tree successfully.\n"); + fprintf(stdout, "Chunk tree recovered successfully\n"); } else if (ret > 0) { ret = 0; - fprintf(stdout, "Abort to rebuild the on-disk chunk tree.\n"); + fprintf(stdout, "Chunk tree recovery aborted\n"); } else { - fprintf(stdout, "Fail to recover the chunk tree.\n"); + fprintf(stdout, "Chunk tree recovery failed\n"); } return ret; } +static const char * const cmd_rescue_super_recover_usage[] = { + "btrfs rescue super-recover [options] ", + "Recover bad superblocks from good copies", + "", + "-y Assume an answer of `yes' to all questions", + "-v Verbose mode", + NULL +}; + /* * return codes: * 0 : All superblocks are valid, no need to recover @@ -109,7 +112,7 @@ int cmd_chunk_recover(int argc, char *argv[]) * 3 : Fail to Recover bad supeblocks * 4 : Abort to recover bad superblocks */ -int cmd_super_recover(int argc, char **argv) +static int cmd_rescue_super_recover(int argc, char **argv) { int ret; int verbose = 0; @@ -128,32 +131,136 @@ int cmd_super_recover(int argc, char **argv) yes = 1; break; default: - usage(cmd_super_recover_usage); + usage(cmd_rescue_super_recover_usage); } } - argc = argc - optind; - if (argc != 1) - usage(cmd_super_recover_usage); + if (check_argc_exact(argc - optind, 1)) + usage(cmd_rescue_super_recover_usage); dname = argv[optind]; ret = check_mounted(dname); if (ret < 0) { - fprintf(stderr, "Could not check mount status: %s\n", - strerror(-ret)); + error("could not check mount status: %s", strerror(-ret)); return 1; } else if (ret) { - fprintf(stderr, "the device is busy\n"); + error("the device is busy"); return 1; } ret = btrfs_recover_superblocks(dname, verbose, yes); return ret; } +static const char * const cmd_rescue_zero_log_usage[] = { + "btrfs rescue zero-log ", + "Clear the tree log. Usable if it's corrupted and prevents mount.", + "", + NULL +}; + +static int cmd_rescue_zero_log(int argc, char **argv) +{ + struct btrfs_root *root; + struct btrfs_trans_handle *trans; + struct btrfs_super_block *sb; + char *devname; + int ret; + + clean_args_no_options(argc, argv, cmd_rescue_zero_log_usage); + + if (check_argc_exact(argc, 2)) + usage(cmd_rescue_zero_log_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; + } + + root = open_ctree(devname, 0, OPEN_CTREE_WRITES | OPEN_CTREE_PARTIAL); + if (!root) { + error("could not open ctree"); + return 1; + } + + sb = root->fs_info->super_copy; + printf("Clearing log on %s, previous log_root %llu, level %u\n", + devname, + (unsigned long long)btrfs_super_log_root(sb), + (unsigned)btrfs_super_log_root_level(sb)); + trans = btrfs_start_transaction(root, 1); + BUG_ON(IS_ERR(trans)); + btrfs_set_super_log_root(sb, 0); + btrfs_set_super_log_root_level(sb, 0); + btrfs_commit_transaction(trans, root); + close_ctree(root); + +out: + return !!ret; +} + +static const char * const cmd_rescue_fix_device_size_usage[] = { + "btrfs rescue fix-device-size ", + "Re-align device and super block sizes. Usable if newer kernel refuse to mount it due to mismatch super size", + "", + NULL +}; + +static int cmd_rescue_fix_device_size(int argc, char **argv) +{ + struct btrfs_fs_info *fs_info; + char *devname; + int ret; + + clean_args_no_options(argc, argv, cmd_rescue_fix_device_size_usage); + + if (check_argc_exact(argc, 2)) + usage(cmd_rescue_fix_device_size_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_fix_device_and_super_size(fs_info); + if (ret > 0) + ret = 0; + close_ctree(fs_info->tree_root); +out: + return !!ret; +} + +static const char rescue_cmd_group_info[] = +"toolbox for specific rescue operations"; + 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 } + rescue_cmd_group_usage, rescue_cmd_group_info, { + { "chunk-recover", cmd_rescue_chunk_recover, + cmd_rescue_chunk_recover_usage, NULL, 0}, + { "super-recover", cmd_rescue_super_recover, + cmd_rescue_super_recover_usage, NULL, 0}, + { "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}, + NULL_CMD_STRUCT } };