1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
|
'''
mkfs.py - this file is part of S3QL (http://s3ql.googlecode.com)
Copyright (C) 2008-2009 Nikolaus Rath <Nikolaus@rath.org>
This program can be distributed under the terms of the GNU GPLv3.
'''
from __future__ import division, print_function, absolute_import
from . import CURRENT_FS_REV
from .backends.common import get_bucket, BetterBucket
from .common import (get_bucket_cachedir, setup_logging, QuietError,
stream_write_bz2, CTRL_INODE)
from .database import Connection
from .metadata import dump_metadata, create_tables
from .parse_args import ArgumentParser
from getpass import getpass
from llfuse import ROOT_INODE
from s3ql.backends.common import NoSuchBucket
import cPickle as pickle
import logging
import os
import shutil
import stat
import sys
import tempfile
import time
log = logging.getLogger("mkfs")
def parse_args(args):
parser = ArgumentParser(
description="Initializes an S3QL file system")
parser.add_cachedir()
parser.add_authfile()
parser.add_debug_modules()
parser.add_quiet()
parser.add_version()
parser.add_storage_url()
parser.add_argument("-L", default='', help="Filesystem label",
dest="label", metavar='<name>',)
parser.add_argument("--max-obj-size", type=int, default=10240, metavar='<size>',
help="Maximum size of storage objects in KB. Files bigger than this "
"will be spread over multiple objects in the storage backend. "
"Default: %(default)d KB.")
parser.add_argument("--plain", action="store_true", default=False,
help="Create unencrypted file system.")
parser.add_argument("--force", action="store_true", default=False,
help="Overwrite any existing data.")
options = parser.parse_args(args)
return options
def init_tables(conn):
# Insert root directory
timestamp = time.time()
conn.execute("INSERT INTO inodes (id,mode,uid,gid,mtime,atime,ctime,refcount) "
"VALUES (?,?,?,?,?,?,?,?)",
(ROOT_INODE, stat.S_IFDIR | stat.S_IRUSR | stat.S_IWUSR | stat.S_IXUSR
| stat.S_IRGRP | stat.S_IXGRP | stat.S_IROTH | stat.S_IXOTH,
os.getuid(), os.getgid(), timestamp, timestamp, timestamp, 1))
# Insert control inode, the actual values don't matter that much
conn.execute("INSERT INTO inodes (id,mode,uid,gid,mtime,atime,ctime,refcount) "
"VALUES (?,?,?,?,?,?,?,?)",
(CTRL_INODE, stat.S_IFIFO | stat.S_IRUSR | stat.S_IWUSR,
0, 0, timestamp, timestamp, timestamp, 42))
# Insert lost+found directory
inode = conn.rowid("INSERT INTO inodes (mode,uid,gid,mtime,atime,ctime,refcount) "
"VALUES (?,?,?,?,?,?,?)",
(stat.S_IFDIR | stat.S_IRUSR | stat.S_IWUSR | stat.S_IXUSR,
os.getuid(), os.getgid(), timestamp, timestamp, timestamp, 1))
name_id = conn.rowid('INSERT INTO names (name, refcount) VALUES(?,?)',
(b'lost+found', 1))
conn.execute("INSERT INTO contents (name_id, inode, parent_inode) VALUES(?,?,?)",
(name_id, inode, ROOT_INODE))
def main(args=None):
if args is None:
args = sys.argv[1:]
options = parse_args(args)
setup_logging(options)
if options.max_obj_size < 1024:
log.warn('Warning: maximum object sizes less than 1 MB will seriously degrade '
'performance.')
try:
plain_bucket = get_bucket(options, plain=True)
except NoSuchBucket as exc:
raise QuietError(str(exc))
if 's3ql_metadata' in plain_bucket:
if not options.force:
raise QuietError("Found existing file system! Use --force to overwrite")
log.info('Purging existing file system data..')
plain_bucket.clear()
if not plain_bucket.is_get_consistent():
log.info('Please note that the new file system may appear inconsistent\n'
'for a while until the removals have propagated through the backend.')
if not options.plain:
if sys.stdin.isatty():
wrap_pw = getpass("Enter encryption password: ")
if not wrap_pw == getpass("Confirm encryption password: "):
raise QuietError("Passwords don't match.")
else:
wrap_pw = sys.stdin.readline().rstrip()
# Generate data encryption passphrase
log.info('Generating random encryption key...')
fh = open('/dev/urandom', "rb", 0) # No buffering
data_pw = fh.read(32)
fh.close()
bucket = BetterBucket(wrap_pw, 'bzip2', plain_bucket)
bucket['s3ql_passphrase'] = data_pw
else:
data_pw = None
bucket = BetterBucket(data_pw, 'bzip2', plain_bucket)
# Setup database
cachepath = get_bucket_cachedir(options.storage_url, options.cachedir)
# There can't be a corresponding bucket, so we can safely delete
# these files.
if os.path.exists(cachepath + '.db'):
os.unlink(cachepath + '.db')
if os.path.exists(cachepath + '-cache'):
shutil.rmtree(cachepath + '-cache')
log.info('Creating metadata tables...')
db = Connection(cachepath + '.db')
create_tables(db)
init_tables(db)
param = dict()
param['revision'] = CURRENT_FS_REV
param['seq_no'] = 1
param['label'] = options.label
param['max_obj_size'] = options.max_obj_size * 1024
param['needs_fsck'] = False
param['inode_gen'] = 0
param['max_inode'] = db.get_val('SELECT MAX(id) FROM inodes')
param['last_fsck'] = time.time()
param['last-modified'] = time.time()
# This indicates that the convert_legacy_metadata() stuff
# in BetterBucket is not required for this file system.
param['bucket_revision'] = 1
log.info('Dumping metadata...')
fh = tempfile.TemporaryFile()
dump_metadata(db, fh)
def do_write(obj_fh):
fh.seek(0)
stream_write_bz2(fh, obj_fh)
return obj_fh
log.info("Compressing and uploading metadata...")
bucket.store('s3ql_seq_no_%d' % param['seq_no'], 'Empty')
obj_fh = bucket.perform_write(do_write, "s3ql_metadata", metadata=param,
is_compressed=True)
log.info('Wrote %.2f MB of compressed metadata.', obj_fh.get_obj_size() / 1024 ** 2)
pickle.dump(param, open(cachepath + '.params', 'wb'), 2)
if __name__ == '__main__':
main(sys.argv[1:])
|
