From 4305d024938113df5d73021a09eb2a991f54ca2f Mon Sep 17 00:00:00 2001 From: Dimitri John Ledkov Date: Mon, 13 Feb 2017 11:24:33 +0000 Subject: New upstream release Closes: #849353, #817806, #854915, #845473 --- send-dump.c | 338 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 338 insertions(+) create mode 100644 send-dump.c (limited to 'send-dump.c') diff --git a/send-dump.c b/send-dump.c new file mode 100644 index 00000000..4c44246f --- /dev/null +++ b/send-dump.c @@ -0,0 +1,338 @@ +/* + * 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#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; \ + } \ +}) + +/* + * Print path and escape chaacters (in a C way) that could break the line. + * Returns the length of the escaped characters. Unprintable characters are + * escaped as octals. + */ +static int print_path_escaped(const char *path) +{ + size_t i; + size_t path_len = strlen(path); + int len = 0; + + for (i = 0; i < path_len; i++) { + char c = path[i]; + + len++; + switch (c) { + case '\a': putchar('\\'); putchar('a'); len++; break; + case '\b': putchar('\\'); putchar('b'); len++; break; + case '\e': putchar('\\'); putchar('e'); len++; break; + case '\f': putchar('\\'); putchar('f'); len++; break; + case '\n': putchar('\\'); putchar('n'); len++; break; + case '\r': putchar('\\'); putchar('r'); len++; break; + case '\t': putchar('\\'); putchar('t'); len++; break; + case '\v': putchar('\\'); putchar('v'); len++; break; + case ' ': putchar('\\'); putchar(' '); len++; break; + case '\\': putchar('\\'); putchar('\\'); len++; break; + default: + if (!isprint(c)) { + printf("\\%c%c%c", + '0' + ((c & 0300) >> 6), + '0' + ((c & 070) >> 3), + '0' + (c & 07)); + len += 3; + } else { + putchar(c); + } + } + } + return len; +} + +/* + * 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", title); + ret = print_path_escaped(out_path); + if (!fmt) + return 0; + /* Short paths ale aligned to 32 chars */ + while (ret++ < 32) + putchar(' '); + 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; + + if (!localtime_r(&ts->tv_sec, &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 +}; 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