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ping_fuse.py
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ping_fuse.py
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#!/usr/bin/python
import os, sys, stat, errno, posix, logging, time, fuse
import ping, ping_reporter, ping_filesystem
from time import time
fuse.fuse_python_api = (0,2)
log = ping_reporter.setup_log('PingFuse')
class PingFuse(fuse.Fuse):
def __init__(self, server):
self.FS = ping_filesystem.PingFS(server)
#ping.drop_privileges()
fuse.Fuse.__init__(self)
log.notice('ping::fuse: initialized (%d-byte blocks)'%self.FS.disk.block_size())
def fsinit(self):
self.reporter = ping_reporter.PingReporter(log,'',90)
self.reporter.start()
def getattr(self, path):
"""
- st_mode (protection bits)
- st_ino (inode number)
- st_dev (device)
- st_nlink (number of hard links)
- st_uid (user ID of owner)
- st_gid (group ID of owner)
- st_size (size of file, in bytes)
- st_atime (time of most recent access)
- st_mtime (time of most recent content modification)
- st_ctime (platform dependent; time of most recent metadata change on Unix,
or the time of creation on Windows).
"""
log.info('getattr: %s' % path)
pFile = self.FS.get(path)
if not pFile: return -errno.ENOENT
st = fuse.Stat()
st.st_mode = pFile.type | pFile.mode
st.st_ino = pFile.inode
st.st_nlink = pFile.links()
st.st_uid = 1000 #pFile.uid
st.st_gid = 1000 #pFile.gid
st.st_size = pFile.size()
#st.st_atime = time()
#st.st_mtime = time()
#st.st_ctime = time()
#st.st_dev = 2050L
return st
def readdir(self, path, offset):
log.info('readdir: %s'%path)
pDir = self.FS.get(path)
if not pDir: return -errno.ENOENT
if pDir.type != stat.S_IFDIR:
return [fuse.Direntry(pDir.name)]
files = [fuse.Direntry('.'),fuse.Direntry('..')]
for e in pDir.entries:
files.append(fuse.Direntry(e.name))
return files
def mkdir(self, path, mode):
log.info('mkdir: %s mode=%04o'%(path,mode))
if path == '/' or path == '': return -errno.EACCESS
if self.FS.get(path): return -errno.EEXIST
rPath,rName = path.rsplit('/',1)
pDir = self.FS.get(rPath)
if not pDir: return -errno.ENOENT
nDir = ping_filesystem.PingDirectory(rName)
self.FS.add(nDir) # acquire inode
pDir.add_node(nDir) # add dirent
self.FS.update(pDir) # save
return 0
def open(self, path, flags):
log.info('open: %s flags=%x'%(path,flags))
pFile = self.FS.get(path)
if not pFile: return -errno.ENOENT
return 0
def read(self, path, length, offset):
log.info('read: %s region=%d,%d'%(path,offset,length))
pFile = self.FS.get(path)
if not pFile: return -errno.ENOENT
if offset > len(pFile.data): return -errno.EINVAL
if pFile.type == stat.S_IFDIR: return -errno.EISDIR
return pFile.data[offset:offset+length]
def chmod(self, path, mode):
log.info('chmod: %s mode=%04o'%(path,mode))
pFile = self.FS.get(path)
if not pFile: return -errno.ENOENT
pFile.mode = mode
self.FS.update(pFile)
return 0
def chown(self, path, uid, gid):
log.info('chown: %s uid=%d gid=%d)'%(path,uid,gid))
pFile = self.FS.get(path)
if not pFile: return -errno.ENOENT
pFile.uid = uid
pFile.gid = gid
self.FS.update(pFile)
return 0
def rmdir(self, path):
log.info('rmdir: %s'%path)
pFile = self.FS.get(path)
if not pFile: return -errno.ENOENT
if pFile.type != stat.S_IFDIR: return -errno.ENOTDIR
if self.FS.unlink(path,pFile): return 0
return -errno.EINVAL
def unlink(self, path):
log.info('unlink: %s'%path)
pFile = self.FS.get(path)
if not pFile: return -errno.ENOENT
if pFile.type != stat.S_IFREG: return -errno.ENOTDIR
if self.FS.unlink(path,pFile): return 0
return -errno.EINVAL
def write(self, path, buf, offset):
log.info('write: %s region=%d,%d'%(path,offset,offset+len(buf)))
pFile = self.FS.get(path)
if not pFile: return -errno.ENOENT
pDir = self.FS.get_parent(path,pFile)
if not pDir: raise Exception('write failed to find parent after filding child!')
if offset:
fill = '\0' * min(0,offset - len(pFile.data)) # technically don't need to bound negatives
offset = pFile.data[:offset] + fill
else: offset = ''
pFile.data = offset + buf
if not self.FS.update(pFile,pDir):
return -errno.EINVAL
return len(buf)
def truncate(self, path, size):
log.info('truncate: %s size=%d'%(path, size))
pFile = self.FS.get(path)
if not pFile: return -errno.ENOENT
if size > len(pFile.data): return -errno.EINVAL
if pFile.type != stat.S_IFREG: return -errno.EINVAL
pFile.data = pFile.data[:size]
self.FS.update(pFile)
return 0
def mknod(self, path, mode, dev):
log.info('mknod: %s mode=%04o dev=%d)'%(path,mode,dev))
if not mode & stat.S_IFREG: return -errno.ENOSYS
pFile = self.FS.get(path)
if pFile: return -errno.EEXIST
pFile = self.FS.create(path)
if not pFile: return -errno.EINVAL
pFile.mode = mode & 0777
self.FS.update(pFile)
return 0
def rename(self, old_path, new_path):
log.info('rename: %s -> %s'%(old_path,new_path))
(oDir,oFile) = self.FS.get_both(old_path)
(nDir,nFile) = self.FS.get_both(new_path)
new_name = new_path.rsplit('/',1)[1]
if not oFile: return -errno.ENOENT
if not oDir or not nDir: return -errno.ENOENT
if nFile: return -errno.EEXIST
oDir.del_node(oFile.name,oFile)
oFile.name = new_name
nDir.add_node(oFile)
# better to be in both than neither
self.FS.update(nDir)
self.FS.update(oFile)
self.FS.update(oDir)
return 0
def link(self, targetPath, linkPath):
log.info('link: %s <- %s)'%(targetPath, linkPath))
return -errno.ENOSYS
def readlink(self, path):
log.info('readlink: %s'%path)
return -errno.ENOSYS
def symlink(self, targetPath, linkPath):
log.info('symlink: %s <- %s'%(targetPath, linkPath))
return -errno.ENOSYS
# def mythread ( self ):
# log.info('mythread')
# return -errno.ENOSYS
def release(self, path, flags):
log.info('release: %s flags=%x'%(path,flags))
return -errno.ENOSYS
def statf(self):
log.info('statfs')
return -errno.ENOSYS
def utime(self, path, times):
log.info('utime: %s times=%s'%(path,times))
return -errno.ENOSYS
def fsync(self, path, isFsyncFile):
log.info('fsync: %s fsyncFile? %s'%(path,isFsyncFile))
return -errno.ENOSYS
if __name__ == "__main__":
import ping_disk
#ping_reporter.enableAllLogs(logging.DEBUG,logging.TRACE)
ping_reporter.start_log(log,logging.NOTICE)
#ping_reporter.start_log(ping_filesystem.log,logging.DEBUG)
#ping_reporter.start_log(ping_disk.log,logging.DEBUG)
server = ping.select_server(log)
if len(sys.argv) < 2:
print 'usage: %s <mountpoint>' % sys.argv[0]
sys.exit(1)
sys.argv.append('-f')
fs = PingFuse(server)
#fs.parser.add_option(mountopt="root",metavar="PATH", default='/')
#fs.parse(values=fs, errex=1)
fs.parse(errex=1)
fs.flags = 0
#fs.multithreaded = 0
ping_filesystem.init_fs(fs.FS)
#ping_filesystem.test_fs(fs.FS)
if 0:
log.info('file system testing begun')
fs.mknod('/test_file2',stat.S_IFREG | 0777,0)
fs.mknod('/test_file1',stat.S_IFREG | 0777,0)
wData = 'A'*fs.FS.disk.region_size()*fs.FS.disk.block_size()
fs.write('/test_file1',wData,0)
log.info('completed writing testfile1: %d bytes'%len(wData))
rData = fs.read('/test_file1',len(wData),0)
if rData == wData: log.info( 'read verified successfully')
elif len(wData) != len(rData): log.error('read failed (%d of %d bytes)'%(len(rData),len(wData)))
else: log.error('read failed (bytes corrupted)')
fs.write('/test_file1',wData,len(wData))
wData = wData + wData
log.info('completed writing testfile1: %d bytes'%len(wData))
rData = fs.read('/test_file1',len(wData),0)
if rData == wData: log.info( 'read verified successfully')
elif len(wData) != len(rData): log.error('read failed (%d of %d bytes)'%(len(rData),len(wData)))
else: log.error('read failed (bytes corrupted)')
fs.write('/test_file2',wData,0)
log.info('completed writing testfile2: %d bytes'%len(wData))
rData = fs.read('/test_file2',len(wData),0)
if rData == wData: log.info( 'read verified successfully')
elif len(wData) != len(rData): log.error('read failed (%d of %d bytes)'%(len(rData),len(wData)))
else: log.error('read failed (bytes corrupted)')
log.info('file system testing complete')
log.info('file system up and running')
try:
fs.main()
except KeyboardInterrupt:
log.info('fs stopping')
sys.exit(1)