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/*
* duperemove.c
*
* Copyright (C) 2013 SUSE. 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 version 2 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.
*
* Authors: Mark Fasheh <mfasheh@suse.de>
*/
#include <sys/types.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <stddef.h>
#include <errno.h>
#include <string.h>
#include <getopt.h>
#include <inttypes.h>
#include <unistd.h>
#include <glib.h>
#include "list.h"
#include "csum.h"
#include "filerec.h"
#include "hash-tree.h"
#include "results-tree.h"
#include "dedupe.h"
#include "util.h"
#include "btrfs-util.h"
#include "dbfile.h"
#include "stats.h"
#include "memstats.h"
#include "debug.h"
#include "file_scan.h"
#include "find_dupes.h"
#include "run_dedupe.h"
#define MIN_BLOCKSIZE (4U*1024)
/* max blocksize is somewhat arbitrary. */
#define MAX_BLOCKSIZE (1024U*1024)
#define DEFAULT_BLOCKSIZE (128U*1024)
unsigned int blocksize = DEFAULT_BLOCKSIZE;
int run_dedupe = 0;
int recurse_dirs = 0;
int v2_hashfile = 0;
int dedupe_same_file = 1;
int skip_zeroes = 0;
int target_rw = 1;
static int version_only = 0;
static int help_option = 0;
static int fdupes_mode = 0;
static int stdin_filelist = 0;
static unsigned int list_only_opt = 0;
static unsigned int rm_only_opt = 0;
struct dbfile_config dbfile_cfg;
static bool force_v2_hashfile = false;
static int partial_extent_search = 0;
static enum {
H_READ,
H_WRITE,
H_UPDATE,
} use_hashfile = H_UPDATE;
char *serialize_fname = NULL;
static unsigned int nr_logical_cpus;
static unsigned int nr_physical_cpus;
unsigned int io_threads;
unsigned int cpu_threads;
int io_threads_opt = 0;
int cpu_threads_opt = 0;
int do_lookup_extents = 1;
int fiemap_during_dedupe = 1;
int stdout_is_tty = 0;
static char *user_hash = DEFAULT_HASH_STR;
static void print_file(char *filename, char *ino, char *subvol)
{
if (verbose)
printf("%s\t%s\t%s\n", filename, ino, subvol);
else
printf("%s\n", filename);
}
static int list_db_files(char *filename)
{
int ret;
ret = dbfile_open(filename, &dbfile_cfg);
if (ret) {
fprintf(stderr, "Error: Could not open \"%s\"\n", filename);
return ret;
}
ret = dbfile_iter_files(dbfile_get_handle(), &print_file);
dbfile_close();
return ret;
}
struct rm_file {
char *filename;
struct list_head list;
};
static LIST_HEAD(rm_files_list);
static void add_rm_file(const char *filename)
{
struct rm_file *rm = malloc(sizeof(*rm));
if (rm) {
rm->filename = strdup(filename);
list_add_tail(&rm->list, &rm_files_list);
}
}
static void free_rm_file(struct rm_file *rm)
{
if (rm) {
list_del(&rm->list);
free(rm->filename);
free(rm);
}
}
static void add_rm_db_files_from_stdin(void)
{
char *path = NULL;
size_t pathlen = 0;
ssize_t readlen;
while ((readlen = getline(&path, &pathlen, stdin)) != -1) {
if (readlen == 0)
continue;
if (readlen > 0 && path[readlen - 1] == '\n') {
path[--readlen] = '\0';
}
if (readlen > PATH_MAX - 1) {
fprintf(stderr, "Path max exceeded: %s\n", path);
continue;
}
add_rm_file(path);
}
if (path != NULL)
free(path);
}
static int rm_db_files(char *dbfilename)
{
int ret, err = 0;
struct rm_file *rm, *tmp;
ret = dbfile_open(dbfilename, &dbfile_cfg);
if (ret) {
fprintf(stderr, "Error: Could not open \"%s\"\n", dbfilename);
return ret;
}
restart:
list_for_each_entry_safe(rm, tmp, &rm_files_list, list) {
if (strlen(rm->filename) == 1 && rm->filename[0] == '-') {
add_rm_db_files_from_stdin();
free_rm_file(rm);
/*
* We may have added to the end of the list
* which messes up the next-entry condition
* for list_for_each_entry_safe()
*/
goto restart;
}
ret = dbfile_remove_file(dbfile_get_handle(), &dbfile_cfg,
rm->filename);
if (ret == 0)
vprintf("Removed \"%s\" from hashfile.\n",
rm->filename);
if (ret && ret != ENOENT && !err)
err = ret;
free_rm_file(rm);
}
dbfile_close();
return err;
}
extern struct list_head exclude_list;
static void add_exclude_pattern(const char *pattern)
{
struct exclude_file *exclude = malloc(sizeof(*exclude));
if (exclude) {
exclude->pattern = strdup(pattern);
list_add_tail(&exclude->list, &exclude_list);
}
}
static void usage(const char *prog)
{
char *s = NULL;
#ifdef DEBUG_BUILD
s = " (debug build)";
#endif
printf("duperemove %s%s\n", VERSTRING, s ? s : "");
if (version_only)
return;
printf("Find duplicate extents and optionally dedupe them.\n\n");
printf("Basic usage: %s [-r] [-d] [-h] [-v] [-A] "
"[--hashfile=hashfile] OBJECTS\n", prog);
printf("\n\"OBJECTS\" is a list of files (or directories) which we\n");
printf("want to find duplicate extents in. If a directory is \n");
printf("specified, all regular files inside of it will be scanned.\n");
printf("\n\t<switches>\n");
printf("\t-r\t\tEnable recursive dir traversal.\n");
printf("\t-d\t\tDe-dupe the results (must run on a supported fs).\n");
printf("\t--hashfile=FILE\tStore hashes in this file.\n");
printf("\t-A\t\tOpen files for dedupe in read-only mode.\n");
printf("\t-h\t\tPrint numbers in human-readable format.\n");
printf("\t-v\t\tPrint extra information (verbose).\n");
printf("\t--help\t\tPrints this help text.\n");
printf("\n\nPlease see the duperemove(8) manpage for a complete list "
"of options.\n");
}
static int parse_yesno_option(char *arg, int default_val)
{
if (strncmp(arg, "yes", 3) == 0)
return 1;
else if (strncmp(arg, "no", 2) == 0)
return 0;
return default_val;
}
/* adapted from ocfs2-tools */
static int parse_dedupe_opts(const char *opts)
{
char *options, *token, *next, *p, *arg;
int print_usage = 0;
int invert, ret = 0;
options = strdup(opts);
for (token = options; token && *token; token = next) {
p = strchr(token, ',');
next = NULL;
invert = 0;
if (p) {
*p = '\0';
next = p + 1;
}
arg = strstr(token, "no");
if (arg == token) {
invert = 1;
token += strlen("no");
}
if (strcmp(token, "same") == 0) {
dedupe_same_file = !invert;
} else if (strcmp(token, "block") == 0) {
; /* This option ignored as of v0.12 */
} else if (strcmp(token, "fiemap") == 0) {
fiemap_during_dedupe = !invert;
} else if (strcmp(token, "partial") == 0) {
partial_extent_search = !invert;
} else {
print_usage = 1;
break;
}
}
if (print_usage) {
fprintf(stderr, "Bad dedupe options specified. Valid dedupe "
"options are:\n"
"\t[no]same\n"
"\t[no]block\n");
ret = EINVAL;
}
free(options);
return ret;
}
enum {
DEBUG_OPTION = CHAR_MAX + 1,
HELP_OPTION,
VERSION_OPTION,
WRITE_HASHES_OPTION,
WRITE_OLD_HASHES_OPTION,
READ_HASHES_OPTION,
HASHFILE_OPTION,
IO_THREADS_OPTION,
CPU_THREADS_OPTION,
LOOKUP_EXTENTS_OPTION,
HASH_OPTION,
SKIP_ZEROES_OPTION,
FDUPES_OPTION,
DEDUPE_OPTS_OPTION,
QUIET_OPTION,
EXCLUDE_OPTION,
};
static int add_files_from_stdin(int fdupes)
{
int ret = 0;
char *path = NULL;
size_t pathlen = 0;
ssize_t readlen;
while ((readlen = getline(&path, &pathlen, stdin)) != -1) {
if (readlen == 0)
continue;
if (fdupes && readlen == 1 && path[0] == '\n') {
ret = fdupes_dedupe();
if (ret)
return ret;
continue;
}
if (readlen > 0 && path[readlen - 1] == '\n') {
path[--readlen] = '\0';
}
if (readlen > PATH_MAX - 1) {
fprintf(stderr, "Path max exceeded: %s\n", path);
continue;
}
if (add_file(path))
return 1;
/* Give the user a chance to see some output from add_file(). */
if (!fdupes)
fflush(stdout);
}
if (path != NULL)
free(path);
return 0;
}
static int add_files_from_cmdline(int numfiles, char **files)
{
int i;
for (i = 0; i < numfiles; i++) {
const char *name = files[i];
if (add_file(name))
return 1;
}
return 0;
}
/*
* Ok this is doing more than just parsing options.
*/
static int parse_options(int argc, char **argv, int *filelist_idx)
{
int c, numfiles;
int read_hashes = 0;
int write_hashes = 0;
int update_hashes = 0;
static struct option long_ops[] = {
{ "debug", 0, NULL, DEBUG_OPTION },
{ "help", 0, NULL, HELP_OPTION },
{ "version", 0, NULL, VERSION_OPTION },
{ "write-hashes", 1, NULL, WRITE_HASHES_OPTION },
{ "write-hashes-v2", 1, NULL, WRITE_OLD_HASHES_OPTION },
{ "read-hashes", 1, NULL, READ_HASHES_OPTION },
{ "hashfile", 1, NULL, HASHFILE_OPTION },
{ "io-threads", 1, NULL, IO_THREADS_OPTION },
{ "hash-threads", 1, NULL, IO_THREADS_OPTION },
{ "cpu-threads", 1, NULL, CPU_THREADS_OPTION },
{ "lookup-extents", 1, NULL, LOOKUP_EXTENTS_OPTION },
{ "hash", 1, NULL, HASH_OPTION },
{ "skip-zeroes", 0, NULL, SKIP_ZEROES_OPTION },
{ "fdupes", 0, NULL, FDUPES_OPTION },
{ "dedupe-options=", 1, NULL, DEDUPE_OPTS_OPTION },
{ "quiet", 0, NULL, QUIET_OPTION },
{ "exclude", 1, NULL, EXCLUDE_OPTION },
{ NULL, 0, NULL, 0}
};
if (argc < 2)
return 1;
while ((c = getopt_long(argc, argv, "Ab:vdDrh?LR:q", long_ops, NULL))
!= -1) {
switch (c) {
case 'A':
target_rw = 0;
break;
case 'b':
blocksize = parse_size(optarg);
if (blocksize < MIN_BLOCKSIZE ||
blocksize > MAX_BLOCKSIZE){
fprintf(stderr, "Error: Blocksize is bounded by %u and %u, %u found\n",
MIN_BLOCKSIZE, MAX_BLOCKSIZE, blocksize);
return EINVAL;
}
break;
case 'd':
case 'D':
run_dedupe = 1;
break;
case 'r':
recurse_dirs = 1;
break;
case VERSION_OPTION:
version_only = 1;
break;
case DEBUG_OPTION:
debug = 1;
/* Fall through */
case 'v':
verbose = 1;
break;
case 'h':
human_readable = 1;
break;
case WRITE_OLD_HASHES_OPTION:
force_v2_hashfile = true;
case WRITE_HASHES_OPTION:
write_hashes = 1;
serialize_fname = strdup(optarg);
break;
case READ_HASHES_OPTION:
read_hashes = 1;
serialize_fname = strdup(optarg);
break;
case HASHFILE_OPTION:
update_hashes = 1;
serialize_fname = strdup(optarg);
break;
case IO_THREADS_OPTION:
io_threads = strtoul(optarg, NULL, 10);
if (!io_threads){
fprintf(stderr, "Error: --io-threads must be "
"an integer, %s found\n", optarg);
return EINVAL;
}
io_threads_opt = 1;
break;
case CPU_THREADS_OPTION:
cpu_threads = strtoul(optarg, NULL, 10);
if (!cpu_threads){
fprintf(stderr, "Error: --cpu-threads must be "
"an integer, %s found\n", optarg);
return EINVAL;
}
cpu_threads_opt = 1;
break;
case LOOKUP_EXTENTS_OPTION:
do_lookup_extents = parse_yesno_option(optarg, 0);
break;
case HASH_OPTION:
user_hash = optarg;
break;
case SKIP_ZEROES_OPTION:
skip_zeroes = 1;
break;
case FDUPES_OPTION:
fdupes_mode = 1;
break;
case DEDUPE_OPTS_OPTION:
if (parse_dedupe_opts(optarg))
return EINVAL;
break;
case 'L':
list_only_opt = 1;
break;
case 'R':
rm_only_opt = 1;
add_rm_file(optarg);
break;
case QUIET_OPTION:
case 'q':
quiet = 1;
break;
case EXCLUDE_OPTION:
add_exclude_pattern(optarg);
break;
case HELP_OPTION:
help_option = 1;
case '?':
default:
version_only = 0;
return 1;
}
}
if (!do_lookup_extents || !fiemap_during_dedupe)
force_v2_hashfile = true;
numfiles = argc - optind;
/* Filter out option combinations that don't make sense. */
if ((write_hashes + read_hashes + update_hashes) > 1) {
fprintf(stderr, "Error: Specify only one hashfile option.\n");
return 1;
}
if (read_hashes)
use_hashfile = H_READ;
else if (write_hashes)
use_hashfile = H_WRITE;
else if (update_hashes)
use_hashfile = H_UPDATE;
if (read_hashes) {
if (numfiles) {
fprintf(stderr,
"Error: --read-hashes option does not take a "
"file list argument\n");
return 1;
}
goto out_nofiles;
}
if (fdupes_mode) {
if (read_hashes || write_hashes || update_hashes) {
fprintf(stderr,
"Error: cannot mix hashfile option with "
"--fdupes option\n");
return 1;
}
if (numfiles) {
fprintf(stderr,
"Error: fdupes option does not take a file "
"list argument\n");
return 1;
}
/* rest of fdupes mode is implemented in main() */
return 0;
}
*filelist_idx = 0;
if (numfiles == 1 && strcmp(argv[optind], "-") == 0)
stdin_filelist = 1;
else {
*filelist_idx = optind;
}
if (list_only_opt && rm_only_opt) {
fprintf(stderr, "Error: Can not mix '-L' and '-R' options.\n");
return 1;
}
if (list_only_opt || rm_only_opt) {
if (!serialize_fname || use_hashfile == H_WRITE) {
fprintf(stderr, "Error: --hashfile= option is required "
"with '-L' or -R.\n");
return 1;
}
if (numfiles) {
fprintf(stderr, "Error: -L and -R options do not take "
"a file list argument\n");
return 1;
}
}
out_nofiles:
return 0;
}
static void print_header(void)
{
vprintf("Using %uK blocks\n", blocksize / 1024);
vprintf("Using hash: %s\n", csum_mod->name);
#ifdef DEBUG_BUILD
printf("Debug build, performance may be impacted.\n");
#endif
qprintf("Gathering file list...\n");
}
static int update_config_from_dbfile(void)
{
dedupe_seq = dbfile_cfg.dedupe_seq;
if (strncasecmp(dbfile_cfg.hash_type, hash_type, 8)) {
fprintf(stderr,
"Error: Hashfile %s uses %.*s. for checksums "
"but we are using %.*s.\nTry running with "
"--hash=%.*s\n", serialize_fname, 8,
dbfile_cfg.hash_type, 8, hash_type,
8, dbfile_cfg.hash_type);
return EINVAL;
}
if (dbfile_cfg.blocksize != blocksize &&
dbfile_cfg.major == BLOCK_DEDUPE_DBFILE_VER) {
vprintf("Using blocksize %uK from hashfile (%uK "
"blocksize requested).\n", dbfile_cfg.blocksize/1024,
blocksize/1024);
blocksize = dbfile_cfg.blocksize;
}
return 0;
}
static int create_update_hashfile(int argc, char **argv, int filelist_idx)
{
int ret;
int dbfile_is_new = 0;
ret = dbfile_create(serialize_fname, &dbfile_is_new,
force_v2_hashfile ? BLOCK_DEDUPE_DBFILE_VER : DB_FILE_MAJOR,
&dbfile_cfg);
if (ret)
goto out;
if (force_v2_hashfile && dbfile_cfg.major != BLOCK_DEDUPE_DBFILE_VER) {
ret = EINVAL;
fprintf(stderr, "Error: asked to force hashfile version 2 but "
"existing hashfile has version %d\n", dbfile_cfg.major);
goto out;
}
if (dbfile_cfg.major == BLOCK_DEDUPE_DBFILE_VER)
v2_hashfile = 1;
if (!dbfile_is_new) {
ret = update_config_from_dbfile();
if (ret)
goto out;
fs_set_onefs(dbfile_cfg.onefs_dev, dbfile_cfg.onefs_fsid);
}
print_header();
if (stdin_filelist)
ret = add_files_from_stdin(0);
else
ret = add_files_from_cmdline(argc - filelist_idx,
&argv[filelist_idx]);
if (ret)
goto out;
if (dbfile_is_new) {
dbfile_cfg.blocksize = blocksize;
dbfile_cfg.onefs_dev = fs_onefs_dev();
dbfile_cfg.onefs_fsid = fs_onefs_id();
dbfile_cfg.dedupe_seq = dedupe_seq;
ret = dbfile_sync_config(&dbfile_cfg);
if (ret)
goto out;
} else {
qprintf("Adding files from database for hashing.\n");
ret = dbfile_scan_files(&dbfile_cfg);
if (ret)
goto out;
}
if (list_empty(&filerec_list)) {
fprintf(stderr, "No dedupe candidates found.\n");
ret = EINVAL;
goto out;
}
ret = populate_tree(&dbfile_cfg);
if (ret) {
fprintf(stderr, "Error while populating extent tree!\n");
goto out;
}
ret = create_indexes(dbfile_get_handle(), &dbfile_cfg);
if (ret)
goto out;
/*
* File scan from above can cause quite a bit of output, flush
* here in case of logfile.
*/
if (stdout_is_tty)
fflush(stdout);
ret = dbfile_sync_files(dbfile_get_handle());
if (ret)
goto out;
out:
return ret;
}
int main(int argc, char **argv)
{
int ret, filelist_idx = 0;
struct results_tree res;
struct hash_tree dups_tree;
init_filerec();
init_results_tree(&res);
init_hash_tree(&dups_tree);
ret = parse_options(argc, argv, &filelist_idx);
if (ret || version_only) {
usage(argv[0]);
return (version_only || help_option) ? 0 : EINVAL;
}
/*
* Don't run detection if the user has supplied our cpu counts
* already.
*/
if (!io_threads_opt || !cpu_threads_opt) {
get_num_cpus(&nr_physical_cpus, &nr_logical_cpus);
if (!io_threads)
io_threads = nr_logical_cpus;
if (!cpu_threads)
cpu_threads = nr_physical_cpus;
}
if (fdupes_mode)
return add_files_from_stdin(1);
ret = init_csum_module(user_hash);
if (ret) {
if (ret == EINVAL)
fprintf(stderr,
"Could not initialize hash module \"%s\"\n",
user_hash);
return ret;
}
if (isatty(STDOUT_FILENO))
stdout_is_tty = 1;
if (list_only_opt)
return list_db_files(serialize_fname);
else if (rm_only_opt)
return rm_db_files(serialize_fname);
switch (use_hashfile) {
case H_UPDATE:
case H_WRITE:
if (serialize_fname)
printf("Warning: The hash file format in Duperemove "
"master branch is under development and may "
"change.\nIf the changes are not backwards "
"compatible, you will have to re-create your "
"hash file.\n");
ret = create_update_hashfile(argc, argv, filelist_idx);
if (ret)
goto out;
if (use_hashfile == H_WRITE) {
/*
* This option is for isolating the file scan
* stage. Exit the program now.
*/
qprintf("Hashfile \"%s\" written, exiting.\n",
serialize_fname);
goto out;
}
break;
case H_READ:
ret = dbfile_open(serialize_fname, &dbfile_cfg);
if (ret) {
fprintf(stderr, "Error: Could not open dbfile %s.\n",
serialize_fname);
goto out;
}
if (dbfile_cfg.major == BLOCK_DEDUPE_DBFILE_VER)
v2_hashfile = 1;
/*
* Skips the file scan, used to isolate the
* extent-find and dedupe stages
*/
blocksize = dbfile_cfg.blocksize;
ret = update_config_from_dbfile();
if (ret)
goto out;
print_header();
break;
default:
abort_lineno();
break;
}
qprintf("Loading only duplicated hashes from hashfile.\n");
if (v2_hashfile) {
ret = dbfile_load_block_hashes(&dups_tree);
if (ret)
goto out;
ret = find_all_dupes(&dups_tree, &res);
if (ret) {
/* Only error for this should be enomem */
fprintf(stderr,
"Error %d: %s while finding duplicate extents.\n",
ret, strerror(ret));
goto out;
}
} else {
ret = dbfile_load_extent_hashes(&res);
if (ret)
goto out;
ret = dbfile_load_block_hashes(&dups_tree);
if (ret)
goto out;
printf("Found %llu identical extents.\n", res.num_extents);
if (partial_extent_search) {
ret = find_additional_dedupe(&dups_tree, &res);
if (ret)
goto out;
}
}
#ifdef PRINT_STATS
run_filerec_stats();
#endif
if (run_dedupe) {
dedupe_results(&res, &dups_tree);
/*
* Bump dedupe_seq, this effectively marks the files
* in our hashfile as having been through dedupe.
*/
dedupe_seq++;
/* Sync to get new dedupe_seq written. */
dbfile_cfg.dedupe_seq = dedupe_seq;
dbfile_cfg.blocksize = blocksize;
dbfile_cfg.onefs_dev = fs_onefs_dev();
dbfile_cfg.onefs_fsid = fs_onefs_id();
ret = dbfile_sync_config(&dbfile_cfg);
if (ret)
goto out;
} else {
print_dupes_table(&res);
}
out:
free_results_tree(&res);
free_hash_tree(&dups_tree);
free_all_filerecs();
dbfile_close();
#ifdef DEBUG_BUILD
print_mem_stats();
#else
if (ret == ENOMEM || debug)
print_mem_stats();
#endif
return ret;
}
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