diff options
| -rw-r--r-- | Makefile.in | 2 | ||||
| -rw-r--r-- | send-dump.c | 291 | ||||
| -rw-r--r-- | send-dump.h | 29 |
3 files changed, 321 insertions, 1 deletions
diff --git a/Makefile.in b/Makefile.in index 5c4a995c..4c8ecbfb 100644 --- a/Makefile.in +++ b/Makefile.in @@ -98,7 +98,7 @@ objects = ctree.o disk-io.o kernel-lib/radix-tree.o extent-tree.o print-tree.o \ extent-cache.o extent_io.o volumes.o utils.o repair.o \ qgroup.o raid56.o free-space-cache.o kernel-lib/list_sort.o props.o \ ulist.o qgroup-verify.o backref.o string-table.o task-utils.o \ - inode.o file.o find-root.o free-space-tree.o help.o + inode.o file.o find-root.o free-space-tree.o help.o send-dump.o cmds_objects = cmds-subvolume.o cmds-filesystem.o cmds-device.o cmds-scrub.o \ cmds-inspect.o cmds-balance.o cmds-send.o cmds-receive.o \ cmds-quota.o cmds-qgroup.o cmds-replace.o cmds-check.o \ diff --git a/send-dump.c b/send-dump.c new file mode 100644 index 00000000..8540913c --- /dev/null +++ b/send-dump.c @@ -0,0 +1,291 @@ +/* + * Copyright (C) 2016 Fujitsu. All rights reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public + * License v2 as published by the Free Software Foundation. + * + * 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. + */ + +#include <unistd.h> +#include <stdint.h> +#include <dirent.h> +#include <pthread.h> +#include <math.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <sys/ioctl.h> +#include <libgen.h> +#include <mntent.h> +#include <limits.h> +#include <stdlib.h> +#include <time.h> +#include <asm/types.h> +#include <uuid/uuid.h> +#include "utils.h" +#include "commands.h" +#include "send-utils.h" +#include "send-stream.h" +#include "send-dump.h" + +#define PATH_CAT_OR_RET(function_name, outpath, path1, path2, ret) \ +({ \ + ret = path_cat_out(outpath, path1, path2); \ + if (ret < 0) { \ + error("%s: path invalid: %s\n", function_name, path2); \ + return ret; \ + } \ +}) + +/* + * Underlying PRINT_DUMP, the only difference is how we handle + * the full path. + */ +__attribute__ ((format (printf, 5, 6))) +static int __print_dump(int subvol, void *user, const char *path, + const char *title, const char *fmt, ...) +{ + struct btrfs_dump_send_args *r = user; + char full_path[PATH_MAX] = {0}; + char *out_path; + va_list args; + int ret; + + if (subvol) { + PATH_CAT_OR_RET(title, r->full_subvol_path, r->root_path, path, ret); + out_path = r->full_subvol_path; + } else { + PATH_CAT_OR_RET(title, full_path, r->full_subvol_path, path, ret); + out_path = full_path; + } + + /* Unified header */ + printf("%-16s%-32s", title, out_path); + va_start(args, fmt); + /* Operation specified ones */ + vprintf(fmt, args); + va_end(args); + putchar('\n'); + return 0; +} + +/* For subvolume/snapshot operation only */ +#define PRINT_DUMP_SUBVOL(user, path, title, fmt, ...) \ + __print_dump(1, user, path, title, fmt, ##__VA_ARGS__) + +/* For other operations */ +#define PRINT_DUMP(user, path, title, fmt, ...) \ + __print_dump(0, user, path, title, fmt, ##__VA_ARGS__) + +static int print_subvol(const char *path, const u8 *uuid, u64 ctransid, + void *user) +{ + char uuid_str[BTRFS_UUID_UNPARSED_SIZE]; + + uuid_unparse(uuid, uuid_str); + + return PRINT_DUMP_SUBVOL(user, path, "subvol", "uuid=%s transid=%llu", + uuid_str, ctransid); +} + +static int print_snapshot(const char *path, const u8 *uuid, u64 ctransid, + const u8 *parent_uuid, u64 parent_ctransid, + void *user) +{ + char uuid_str[BTRFS_UUID_UNPARSED_SIZE]; + char parent_uuid_str[BTRFS_UUID_UNPARSED_SIZE]; + int ret; + + uuid_unparse(uuid, uuid_str); + uuid_unparse(parent_uuid, parent_uuid_str); + + ret = PRINT_DUMP_SUBVOL(user, path, "snapshot", + "uuid=%s transid=%llu parent_uuid=%s parent_transid=%llu", + uuid_str, ctransid, parent_uuid_str, + parent_ctransid); + return ret; +} + +static int print_mkfile(const char *path, void *user) +{ + return PRINT_DUMP(user, path, "mkfile", NULL); +} + +static int print_mkdir(const char *path, void *user) +{ + return PRINT_DUMP(user, path, "mkdir", NULL); +} + +static int print_mknod(const char *path, u64 mode, u64 dev, void *user) +{ + return PRINT_DUMP(user, path, "mknod", "mode=%llo dev=0x%llx", mode, + dev); +} + +static int print_mkfifo(const char *path, void *user) +{ + return PRINT_DUMP(user, path, "mkfifo", NULL); +} + +static int print_mksock(const char *path, void *user) +{ + return PRINT_DUMP(user, path, "mksock", NULL); +} + +static int print_symlink(const char *path, const char *lnk, void *user) +{ + return PRINT_DUMP(user, path, "symlink", "dest=%s", lnk); +} + +static int print_rename(const char *from, const char *to, void *user) +{ + struct btrfs_dump_send_args *r = user; + char full_to[PATH_MAX]; + int ret; + + PATH_CAT_OR_RET("rename", full_to, r->full_subvol_path, to, ret); + return PRINT_DUMP(user, from, "rename", "dest=%s", full_to); +} + +static int print_link(const char *path, const char *lnk, void *user) +{ + return PRINT_DUMP(user, path, "link", "dest=%s", lnk); +} + +static int print_unlink(const char *path, void *user) +{ + return PRINT_DUMP(user, path, "unlink", NULL); +} + +static int print_rmdir(const char *path, void *user) +{ + return PRINT_DUMP(user, path, "rmdir", NULL); +} + +static int print_write(const char *path, const void *data, u64 offset, + u64 len, void *user) +{ + return PRINT_DUMP(user, path, "write", "offset=%llu len=%llu", + offset, len); +} + +static int print_clone(const char *path, u64 offset, u64 len, + const u8 *clone_uuid, u64 clone_ctransid, + const char *clone_path, u64 clone_offset, + void *user) +{ + struct btrfs_dump_send_args *r = user; + char full_path[PATH_MAX]; + int ret; + + PATH_CAT_OR_RET("clone", full_path, r->full_subvol_path, clone_path, + ret); + return PRINT_DUMP(user, path, "clone", + "offset=%llu len=%llu from=%s clone_offset=%llu", + offset, len, full_path, clone_offset); +} + +static int print_set_xattr(const char *path, const char *name, + const void *data, int len, void *user) +{ + return PRINT_DUMP(user, path, "set_xattr", "name=%s data=%.*s len=%d", + name, len, (char *)data, len); +} + +static int print_remove_xattr(const char *path, const char *name, void *user) +{ + + return PRINT_DUMP(user, path, "remove_xattr", "name=%s", name); +} + +static int print_truncate(const char *path, u64 size, void *user) +{ + return PRINT_DUMP(user, path, "truncate", "size=%llu", size); +} + +static int print_chmod(const char *path, u64 mode, void *user) +{ + return PRINT_DUMP(user, path, "chmod", "mode=%llo", mode); +} + +static int print_chown(const char *path, u64 uid, u64 gid, void *user) +{ + return PRINT_DUMP(user, path, "chown", "gid=%llu uid=%llu", gid, uid); +} + +static int sprintf_timespec(struct timespec *ts, char *dest, int max_size) +{ + struct tm *tm; + int ret; + + tm = localtime(&ts->tv_sec); + if (!tm) { + error("failed to convert time %lld.%.9ld to local time", + (long long)ts->tv_sec, ts->tv_nsec); + return -EINVAL; + } + ret = strftime(dest, max_size, "%FT%T%z", tm); + if (ret == 0) { + error( + "time %lld.%ld is too long to convert into readable string", + (long long)ts->tv_sec, ts->tv_nsec); + return -EINVAL; + } + return 0; +} + +#define TIME_STRING_MAX 64 +static int print_utimes(const char *path, struct timespec *at, + struct timespec *mt, struct timespec *ct, + void *user) +{ + char at_str[TIME_STRING_MAX]; + char mt_str[TIME_STRING_MAX]; + char ct_str[TIME_STRING_MAX]; + + if (sprintf_timespec(at, at_str, TIME_STRING_MAX - 1) < 0 || + sprintf_timespec(mt, mt_str, TIME_STRING_MAX - 1) < 0 || + sprintf_timespec(ct, ct_str, TIME_STRING_MAX - 1) < 0) + return -EINVAL; + return PRINT_DUMP(user, path, "utimes", "atime=%s mtime=%s ctime=%s", + at_str, mt_str, ct_str); +} + +static int print_update_extent(const char *path, u64 offset, u64 len, + void *user) +{ + return PRINT_DUMP(user, path, "update_extent", "offset=%llu len=%llu", + offset, len); +} + +struct btrfs_send_ops btrfs_print_send_ops = { + .subvol = print_subvol, + .snapshot = print_snapshot, + .mkfile = print_mkfile, + .mkdir = print_mkdir, + .mknod = print_mknod, + .mkfifo = print_mkfifo, + .mksock = print_mksock, + .symlink = print_symlink, + .rename = print_rename, + .link = print_link, + .unlink = print_unlink, + .rmdir = print_rmdir, + .write = print_write, + .clone = print_clone, + .set_xattr = print_set_xattr, + .remove_xattr = print_remove_xattr, + .truncate = print_truncate, + .chmod = print_chmod, + .chown = print_chown, + .utimes = print_utimes, + .update_extent = print_update_extent +}; diff --git a/send-dump.h b/send-dump.h new file mode 100644 index 00000000..06a61085 --- /dev/null +++ b/send-dump.h @@ -0,0 +1,29 @@ +/* + * Copyright (C) 2016 Fujitsu. All rights reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public + * License v2 as published by the Free Software Foundation. + * + * 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. + */ + +#ifndef __BTRFS_SEND_DUMP_H__ +#define __BTRFS_SEND_DUMP_H__ + +#include <linux/limits.h> + +struct btrfs_dump_send_args { + char full_subvol_path[PATH_MAX]; + char root_path[PATH_MAX]; +}; + +extern struct btrfs_send_ops btrfs_print_send_ops; + +#endif |