X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=cmds-rescue.c;h=c40088ad374e2e69447a93b05fd0379a083833b8;hb=feccd7a8180f3f0f48ca23692ad5f71783163450;hp=35a61f8f9c74e4bbf5229978f4c61e5af193f8ae;hpb=133b1b037739d23bf0d6e985f9f828d7100b527d;p=platform%2Fupstream%2Fbtrfs-progs.git diff --git a/cmds-rescue.c b/cmds-rescue.c index 35a61f8..c40088a 100644 --- a/cmds-rescue.c +++ b/cmds-rescue.c @@ -18,16 +18,249 @@ #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] ", NULL }; +int btrfs_recover_chunk_tree(char *path, int verbose, int yes); +int btrfs_recover_superblocks(char *path, int verbose, int yes); + +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.", + "", + "-y Assume an answer of `yes' to all questions", + "-v Verbose mode", + "-h Help", + NULL +}; + +static int cmd_rescue_chunk_recover(int argc, char *argv[]) +{ + int ret = 0; + char *file; + int yes = 0; + int verbose = 0; + + while (1) { + int c = getopt(argc, argv, "yvh"); + if (c < 0) + break; + switch (c) { + case 'y': + yes = 1; + break; + case 'v': + verbose = 1; + break; + case 'h': + default: + usage(cmd_rescue_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) { + error("could not check mount status: %s", strerror(-ret)); + return 1; + } else if (ret) { + error("the device is busy"); + return 1; + } + + ret = btrfs_recover_chunk_tree(file, verbose, yes); + if (!ret) { + fprintf(stdout, "Chunk tree recovered successfully\n"); + } else if (ret > 0) { + ret = 0; + fprintf(stdout, "Chunk tree recovery aborted\n"); + } else { + 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 + * 1 : Usage or syntax error + * 2 : Recover all bad superblocks successfully + * 3 : Fail to Recover bad supeblocks + * 4 : Abort to recover bad superblocks + */ +static int cmd_rescue_super_recover(int argc, char **argv) +{ + int ret; + int verbose = 0; + int yes = 0; + char *dname; + + while (1) { + int c = getopt(argc, argv, "vy"); + if (c < 0) + break; + switch (c) { + case 'v': + verbose = 1; + break; + case 'y': + yes = 1; + break; + default: + usage(cmd_rescue_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) { + error("could not check mount status: %s", strerror(-ret)); + return 1; + } else if (ret) { + 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, { - { 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 } };