Adding upstream version 14.2.21.upstream/14.2.21upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1691 insertions, 0 deletions

diff --git a/src/pybind/cephfs/cephfs.pyx b/src/pybind/cephfs/cephfs.pyx
new file mode 100644
index 00000000..9fcf187e
--- /dev/null
+++ b/src/pybind/cephfs/cephfs.pyx
@@ -0,0 +1,1691 @@
+"""
+This module is a thin wrapper around libcephfs.
+"""
+
+from cpython cimport PyObject, ref, exc
+from libc cimport errno
+from libc.stdint cimport *
+from libc.stdlib cimport malloc, realloc, free
+
+cimport rados
+
+from collections import namedtuple
+from datetime import datetime
+import errno
+import os
+import sys
+import time
+
+# Are we running Python 2.x
+if sys.version_info[0] < 3:
+    str_type = basestring
+else:
+    str_type = str
+
+AT_NO_ATTR_SYNC = 0x4000
+AT_SYMLINK_NOFOLLOW = 0x100
+cdef int AT_SYMLINK_NOFOLLOW_CDEF = AT_SYMLINK_NOFOLLOW
+CEPH_STATX_BASIC_STATS = 0x7ff
+cdef int CEPH_STATX_BASIC_STATS_CDEF = CEPH_STATX_BASIC_STATS
+CEPH_STATX_MODE = 0x1
+CEPH_STATX_NLINK = 0x2
+CEPH_STATX_UID = 0x4
+CEPH_STATX_GID = 0x8
+CEPH_STATX_RDEV = 0x10
+CEPH_STATX_ATIME = 0x20
+CEPH_STATX_MTIME = 0x40
+CEPH_STATX_CTIME = 0x80
+CEPH_STATX_INO = 0x100
+CEPH_STATX_SIZE = 0x200
+CEPH_STATX_BLOCKS = 0x400
+CEPH_STATX_BTIME = 0x800
+CEPH_STATX_VERSION = 0x1000
+
+cdef extern from "Python.h":
+    # These are in cpython/string.pxd, but use "object" types instead of
+    # PyObject*, which invokes assumptions in cpython that we need to
+    # legitimately break to implement zero-copy string buffers in Image.read().
+    # This is valid use of the Python API and documented as a special case.
+    PyObject *PyBytes_FromStringAndSize(char *v, Py_ssize_t len) except NULL
+    char* PyBytes_AsString(PyObject *string) except NULL
+    int _PyBytes_Resize(PyObject **string, Py_ssize_t newsize) except -1
+    void PyEval_InitThreads()
+
+
+cdef extern from "sys/statvfs.h":
+    cdef struct statvfs:
+        unsigned long int f_bsize
+        unsigned long int f_frsize
+        unsigned long int f_blocks
+        unsigned long int f_bfree
+        unsigned long int f_bavail
+        unsigned long int f_files
+        unsigned long int f_ffree
+        unsigned long int f_favail
+        unsigned long int f_fsid
+        unsigned long int f_flag
+        unsigned long int f_namemax
+        unsigned long int f_padding[32]
+
+
+IF UNAME_SYSNAME == "FreeBSD":
+    cdef extern from "dirent.h":
+        cdef struct dirent:
+            long int d_ino
+            unsigned short int d_reclen
+            unsigned char d_type
+            char d_name[256]
+ELSE:
+    cdef extern from "dirent.h":
+        cdef struct dirent:
+            long int d_ino
+            unsigned long int d_off
+            unsigned short int d_reclen
+            unsigned char d_type
+            char d_name[256]
+
+
+cdef extern from "time.h":
+    ctypedef long int time_t
+
+cdef extern from "time.h":
+    cdef struct timespec:
+        time_t      tv_sec
+        long int    tv_nsec
+
+cdef extern from "sys/types.h":
+    ctypedef unsigned long mode_t
+
+cdef extern from "<utime.h>":
+    cdef struct utimbuf:
+        time_t actime
+        time_t modtime
+
+cdef extern from "sys/time.h":
+    cdef struct timeval:
+        long tv_sec
+        long tv_usec
+
+cdef extern from "cephfs/ceph_ll_client.h":
+    cdef struct statx "ceph_statx":
+        uint32_t    stx_mask
+        uint32_t    stx_blksize
+        uint32_t    stx_nlink
+        uint32_t    stx_uid
+        uint32_t    stx_gid
+        uint16_t    stx_mode
+        uint64_t    stx_ino
+        uint64_t    stx_size
+        uint64_t    stx_blocks
+        uint64_t    stx_dev
+        uint64_t    stx_rdev
+        timespec    stx_atime
+        timespec    stx_ctime
+        timespec    stx_mtime
+        timespec    stx_btime
+        uint64_t    stx_version
+
+cdef extern from "cephfs/libcephfs.h" nogil:
+    cdef struct ceph_mount_info:
+        pass
+
+    cdef struct ceph_dir_result:
+        pass
+
+    ctypedef void* rados_t
+
+    const char *ceph_version(int *major, int *minor, int *patch)
+
+    int ceph_create(ceph_mount_info **cmount, const char * const id)
+    int ceph_create_from_rados(ceph_mount_info **cmount, rados_t cluster)
+    int ceph_init(ceph_mount_info *cmount)
+    void ceph_shutdown(ceph_mount_info *cmount)
+
+    int ceph_conf_read_file(ceph_mount_info *cmount, const char *path_list)
+    int ceph_conf_parse_argv(ceph_mount_info *cmount, int argc, const char **argv)
+    int ceph_conf_get(ceph_mount_info *cmount, const char *option, char *buf, size_t len)
+    int ceph_conf_set(ceph_mount_info *cmount, const char *option, const char *value)
+
+    int ceph_mount(ceph_mount_info *cmount, const char *root)
+    int ceph_select_filesystem(ceph_mount_info *cmount, const char *fs_name)
+    int ceph_unmount(ceph_mount_info *cmount)
+    int ceph_abort_conn(ceph_mount_info *cmount)
+    uint64_t ceph_get_instance_id(ceph_mount_info *cmount)
+    int ceph_fstatx(ceph_mount_info *cmount, int fd, statx *stx, unsigned want, unsigned flags)
+    int ceph_statx(ceph_mount_info *cmount, const char *path, statx *stx, unsigned want, unsigned flags)
+    int ceph_statfs(ceph_mount_info *cmount, const char *path, statvfs *stbuf)
+
+    int ceph_mds_command(ceph_mount_info *cmount, const char *mds_spec, const char **cmd, size_t cmdlen,
+                         const char *inbuf, size_t inbuflen, char **outbuf, size_t *outbuflen,
+                         char **outs, size_t *outslen)
+    int ceph_rename(ceph_mount_info *cmount, const char *from_, const char *to)
+    int ceph_link(ceph_mount_info *cmount, const char *existing, const char *newname)
+    int ceph_unlink(ceph_mount_info *cmount, const char *path)
+    int ceph_symlink(ceph_mount_info *cmount, const char *existing, const char *newname)
+    int ceph_readlink(ceph_mount_info *cmount, const char *path, char *buf, int64_t size)
+    int ceph_setxattr(ceph_mount_info *cmount, const char *path, const char *name,
+                      const void *value, size_t size, int flags)
+    int ceph_getxattr(ceph_mount_info *cmount, const char *path, const char *name,
+                      void *value, size_t size)
+    int ceph_write(ceph_mount_info *cmount, int fd, const char *buf, int64_t size, int64_t offset)
+    int ceph_read(ceph_mount_info *cmount, int fd, char *buf, int64_t size, int64_t offset)
+    int ceph_flock(ceph_mount_info *cmount, int fd, int operation, uint64_t owner)
+    int ceph_close(ceph_mount_info *cmount, int fd)
+    int ceph_open(ceph_mount_info *cmount, const char *path, int flags, mode_t mode)
+    int ceph_mkdir(ceph_mount_info *cmount, const char *path, mode_t mode)
+    int ceph_mkdirs(ceph_mount_info *cmount, const char *path, mode_t mode)
+    int ceph_closedir(ceph_mount_info *cmount, ceph_dir_result *dirp)
+    int ceph_opendir(ceph_mount_info *cmount, const char *name, ceph_dir_result **dirpp)
+    void ceph_rewinddir(ceph_mount_info *cmount, ceph_dir_result *dirp)
+    int ceph_chdir(ceph_mount_info *cmount, const char *path)
+    dirent * ceph_readdir(ceph_mount_info *cmount, ceph_dir_result *dirp)
+    int ceph_rmdir(ceph_mount_info *cmount, const char *path)
+    const char* ceph_getcwd(ceph_mount_info *cmount)
+    int ceph_sync_fs(ceph_mount_info *cmount)
+    int ceph_fsync(ceph_mount_info *cmount, int fd, int syncdataonly)
+    int ceph_conf_parse_argv(ceph_mount_info *cmount, int argc, const char **argv)
+    int ceph_chmod(ceph_mount_info *cmount, const char *path, mode_t mode)
+    int ceph_chown(ceph_mount_info *cmount, const char *path, int uid, int gid)
+    int ceph_lchown(ceph_mount_info *cmount, const char *path, int uid, int gid)
+    int64_t ceph_lseek(ceph_mount_info *cmount, int fd, int64_t offset, int whence)
+    void ceph_buffer_free(char *buf)
+    mode_t ceph_umask(ceph_mount_info *cmount, mode_t mode)
+    int ceph_utime(ceph_mount_info *cmount, const char *path, utimbuf *buf)
+    int ceph_futime(ceph_mount_info *cmount, int fd, utimbuf *buf)
+    int ceph_utimes(ceph_mount_info *cmount, const char *path, timeval times[2])
+    int ceph_lutimes(ceph_mount_info *cmount, const char *path, timeval times[2])
+    int ceph_futimes(ceph_mount_info *cmount, int fd, timeval times[2])
+    int ceph_futimens(ceph_mount_info *cmount, int fd, timespec times[2])
+
+
+class Error(Exception):
+    pass
+
+
+class OSError(Error):
+    def __init__(self, errno, strerror):
+        super(OSError, self).__init__(errno, strerror)
+        self.errno = errno
+        self.strerror = strerror
+
+    def __str__(self):
+        return '{0}: {1} [Errno {2}]'.format(self.strerror, os.strerror(self.errno), self.errno)
+
+
+class PermissionError(OSError):
+    pass
+
+
+class ObjectNotFound(OSError):
+    pass
+
+
+class NoData(OSError):
+    pass
+
+
+class ObjectExists(OSError):
+    pass
+
+
+class IOError(OSError):
+    pass
+
+
+class NoSpace(OSError):
+    pass
+
+
+class InvalidValue(OSError):
+    pass
+
+
+class OperationNotSupported(OSError):
+    pass
+
+
+class LibCephFSStateError(Error):
+    pass
+
+
+class WouldBlock(OSError):
+    pass
+
+
+class OutOfRange(OSError):
+    pass
+
+
+class ObjectNotEmpty(OSError):
+    pass
+
+
+class DiskQuotaExceeded(OSError):
+    pass
+
+
+IF UNAME_SYSNAME == "FreeBSD":
+    cdef errno_to_exception =  {
+        errno.EPERM      : PermissionError,
+        errno.ENOENT     : ObjectNotFound,
+        errno.EIO        : IOError,
+        errno.ENOSPC     : NoSpace,
+        errno.EEXIST     : ObjectExists,
+        errno.ENOATTR    : NoData,
+        errno.EINVAL     : InvalidValue,
+        errno.EOPNOTSUPP : OperationNotSupported,
+        errno.ERANGE     : OutOfRange,
+        errno.EWOULDBLOCK: WouldBlock,
+        errno.ENOTEMPTY  : ObjectNotEmpty,
+        errno.EDQUOT     : DiskQuotaExceeded,
+    }
+ELSE:
+    cdef errno_to_exception =  {
+        errno.EPERM      : PermissionError,
+        errno.ENOENT     : ObjectNotFound,
+        errno.EIO        : IOError,
+        errno.ENOSPC     : NoSpace,
+        errno.EEXIST     : ObjectExists,
+        errno.ENODATA    : NoData,
+        errno.EINVAL     : InvalidValue,
+        errno.EOPNOTSUPP : OperationNotSupported,
+        errno.ERANGE     : OutOfRange,
+        errno.EWOULDBLOCK: WouldBlock,
+        errno.ENOTEMPTY  : ObjectNotEmpty,
+        errno.EDQUOT     : DiskQuotaExceeded,
+    }
+
+
+cdef make_ex(ret, msg):
+    """
+    Translate a libcephfs return code into an exception.
+
+    :param ret: the return code
+    :type ret: int
+    :param msg: the error message to use
+    :type msg: str
+    :returns: a subclass of :class:`Error`
+    """
+    ret = abs(ret)
+    if ret in errno_to_exception:
+        return errno_to_exception[ret](ret, msg)
+    else:
+        return OSError(ret, msg)
+
+
+class DirEntry(namedtuple('DirEntry',
+               ['d_ino', 'd_off', 'd_reclen', 'd_type', 'd_name'])):
+    DT_DIR = 0x4
+    DT_REG = 0xA
+    DT_LNK = 0xC
+    def is_dir(self):
+        return self.d_type == self.DT_DIR
+
+    def is_symbol_file(self):
+        return self.d_type == self.DT_LNK
+
+    def is_file(self):
+        return self.d_type == self.DT_REG
+
+StatResult = namedtuple('StatResult',
+                        ["st_dev", "st_ino", "st_mode", "st_nlink", "st_uid",
+                         "st_gid", "st_rdev", "st_size", "st_blksize",
+                         "st_blocks", "st_atime", "st_mtime", "st_ctime"])
+
+cdef class DirResult(object):
+    cdef LibCephFS lib
+    cdef ceph_dir_result* handle
+
+# Bug in older Cython instances prevents this from being a static method.
+#    @staticmethod
+#    cdef create(LibCephFS lib, ceph_dir_result* handle):
+#        d = DirResult()
+#        d.lib = lib
+#        d.handle = handle
+#        return d
+
+    def __dealloc__(self):
+        self.close()
+
+    def __enter__(self):
+        if not self.handle:
+            raise make_ex(errno.EBADF, "dir is not open")
+        self.lib.require_state("mounted")
+        with nogil:
+            ceph_rewinddir(self.lib.cluster, self.handle)
+        return self
+
+    def __exit__(self, type_, value, traceback):
+        self.close()
+        return False
+
+    def readdir(self):
+        self.lib.require_state("mounted")
+
+        with nogil:
+            dirent = ceph_readdir(self.lib.cluster, self.handle)
+        if not dirent:
+            return None
+
+        IF UNAME_SYSNAME == "FreeBSD":
+            return DirEntry(d_ino=dirent.d_ino,
+                            d_off=0,
+                            d_reclen=dirent.d_reclen,
+                            d_type=dirent.d_type,
+                            d_name=dirent.d_name)
+        ELSE:
+             return DirEntry(d_ino=dirent.d_ino,
+                            d_off=dirent.d_off,
+                            d_reclen=dirent.d_reclen,
+                            d_type=dirent.d_type,
+                            d_name=dirent.d_name)
+
+    def close(self):
+        if self.handle:
+            self.lib.require_state("mounted")
+            with nogil:
+                ret = ceph_closedir(self.lib.cluster, self.handle)
+            if ret < 0:
+                raise make_ex(ret, "closedir failed")
+            self.handle = NULL
+
+def cstr(val, name, encoding="utf-8", opt=False):
+    """
+    Create a byte string from a Python string
+
+    :param basestring val: Python string
+    :param str name: Name of the string parameter, for exceptions
+    :param str encoding: Encoding to use
+    :param bool opt: If True, None is allowed
+    :rtype: bytes
+    :raises: :class:`InvalidArgument`
+    """
+    if opt and val is None:
+        return None
+    if isinstance(val, bytes):
+        return val
+    else:
+        try:
+            v = val.encode(encoding)
+        except:
+            raise TypeError('%s must be encodeable as a bytearray' % name)
+        assert isinstance(v, bytes)
+        return v
+
+def cstr_list(list_str, name, encoding="utf-8"):
+    return [cstr(s, name) for s in list_str]
+
+
+def decode_cstr(val, encoding="utf-8"):
+    """
+    Decode a byte string into a Python string.
+
+    :param bytes val: byte string
+    :rtype: unicode or None
+    """
+    if val is None:
+        return None
+
+    return val.decode(encoding)
+
+cdef timeval to_timeval(t):
+    """
+    return timeval equivalent from time
+    """
+    tt = int(t)
+    cdef timeval buf = timeval(tt, (t - tt) * 1000000)
+    return buf
+
+cdef timespec to_timespec(t):
+    """
+    return timespec equivalent from time
+    """
+    tt = int(t)
+    cdef timespec buf = timespec(tt, (t - tt) * 1000000000)
+    return buf
+
+cdef char* opt_str(s) except? NULL:
+    if s is None:
+        return NULL
+    return s
+
+
+cdef char ** to_bytes_array(list_bytes):
+    cdef char **ret = <char **>malloc(len(list_bytes) * sizeof(char *))
+    if ret == NULL:
+        raise MemoryError("malloc failed")
+    for i in range(len(list_bytes)):
+        ret[i] = <char *>list_bytes[i]
+    return ret
+
+
+cdef void* realloc_chk(void* ptr, size_t size) except NULL:
+    cdef void *ret = realloc(ptr, size)
+    if ret == NULL:
+        raise MemoryError("realloc failed")
+    return ret
+
+
+cdef class LibCephFS(object):
+    """libcephfs python wrapper"""
+
+    cdef public object state
+    cdef ceph_mount_info *cluster
+
+    def require_state(self, *args):
+        if self.state in args:
+            return
+        raise LibCephFSStateError("You cannot perform that operation on a "
+                                  "CephFS object in state %s." % (self.state))
+
+    def __cinit__(self, conf=None, conffile=None, auth_id=None, rados_inst=None):
+        """Create a libcephfs wrapper
+
+        :param conf dict opt: settings overriding the default ones and conffile
+        :param conffile str opt: the path to ceph.conf to override the default settings
+        :auth_id str opt: the id used to authenticate the client entity
+        :rados_inst Rados opt: a rados.Rados instance
+        """
+        PyEval_InitThreads()
+        self.state = "uninitialized"
+        if rados_inst is not None:
+            if auth_id is not None or conffile is not None or conf is not None:
+                raise make_ex(errno.EINVAL,
+                              "May not pass RADOS instance as well as other configuration")
+
+            self.create_with_rados(rados_inst)
+        else:
+            self.create(conf, conffile, auth_id)
+
+    def create_with_rados(self, rados.Rados rados_inst):
+        cdef int ret
+        with nogil:
+            ret = ceph_create_from_rados(&self.cluster, rados_inst.cluster)
+        if ret != 0:
+            raise Error("libcephfs_initialize failed with error code: %d" % ret)
+        self.state = "configuring"
+
+    NO_CONF_FILE = -1
+    "special value that indicates no conffile should be read when creating a mount handle"
+    DEFAULT_CONF_FILES = -2
+    "special value that indicates the default conffiles should be read when creating a mount handle"
+
+    def create(self, conf=None, conffile=NO_CONF_FILE, auth_id=None):
+        """
+        Create a mount handle for interacting with Ceph.  All libcephfs
+        functions operate on a mount info handle.
+        
+        :param conf dict opt: settings overriding the default ones and conffile
+        :param conffile Union[int,str], optional: the path to ceph.conf to override the default settings
+        :auth_id str opt: the id used to authenticate the client entity
+        """
+        if conf is not None and not isinstance(conf, dict):
+            raise TypeError("conf must be dict or None")
+        cstr(conffile, 'configfile', opt=True)
+        auth_id = cstr(auth_id, 'auth_id', opt=True)
+
+        cdef:
+            char* _auth_id = opt_str(auth_id)
+            int ret
+
+        with nogil:
+            ret = ceph_create(&self.cluster, <const char*>_auth_id)
+        if ret != 0:
+            raise Error("libcephfs_initialize failed with error code: %d" % ret)
+
+        self.state = "configuring"
+        if conffile in (self.NO_CONF_FILE, None):
+            pass
+        elif conffile in (self.DEFAULT_CONF_FILES, ''):
+            self.conf_read_file(None)
+        else:
+            self.conf_read_file(conffile)
+        if conf is not None:
+            for key, value in conf.iteritems():
+                self.conf_set(key, value)
+
+    def conf_read_file(self, conffile=None):
+        """
+        Load the ceph configuration from the specified config file.
+         
+        :param conffile str opt: the path to ceph.conf to override the default settings
+        """
+        conffile = cstr(conffile, 'conffile', opt=True)
+        cdef:
+            char *_conffile = opt_str(conffile)
+        with nogil:
+            ret = ceph_conf_read_file(self.cluster, <const char*>_conffile)
+        if ret != 0:
+            raise make_ex(ret, "error calling conf_read_file")
+
+    def conf_parse_argv(self, argv):
+        """
+        Parse the command line arguments and load the configuration parameters.
+        
+        :param argv: the argument list
+        """
+        self.require_state("configuring")
+        cargv = cstr_list(argv, 'argv')
+        cdef:
+            int _argc = len(argv)
+            char **_argv = to_bytes_array(cargv)
+
+        try:
+            with nogil:
+                ret = ceph_conf_parse_argv(self.cluster, _argc,
+                                           <const char **>_argv)
+            if ret != 0:
+                raise make_ex(ret, "error calling conf_parse_argv")
+        finally:
+            free(_argv)
+
+    def shutdown(self):
+        """
+        Unmount and destroy the ceph mount handle.
+        """
+        if self.state in ["initialized", "mounted"]:
+            with nogil:
+                ceph_shutdown(self.cluster)
+            self.state = "shutdown"
+
+    def __enter__(self):
+        self.mount()
+        return self
+
+    def __exit__(self, type_, value, traceback):
+        self.shutdown()
+        return False
+
+    def __dealloc__(self):
+        self.shutdown()
+
+    def version(self):
+        """
+        Get the version number of the ``libcephfs`` C library.
+
+        :returns: a tuple of ``(major, minor, extra)`` components of the
+                  libcephfs version
+        """
+        cdef:
+            int major = 0
+            int minor = 0
+            int extra = 0
+        with nogil:
+            ceph_version(&major, &minor, &extra)
+        return (major, minor, extra)
+
+    def conf_get(self, option):
+        """
+        Gets the configuration value as a string.
+        
+        :param option: the config option to get
+        """
+        self.require_state("configuring", "initialized", "mounted")
+
+        option = cstr(option, 'option')
+        cdef:
+            char *_option = option
+            size_t length = 20
+            char *ret_buf = NULL
+
+        try:
+            while True:
+                ret_buf = <char *>realloc_chk(ret_buf, length)
+                with nogil:
+                    ret = ceph_conf_get(self.cluster, _option, ret_buf, length)
+                if ret == 0:
+                    return decode_cstr(ret_buf)
+                elif ret == -errno.ENAMETOOLONG:
+                    length = length * 2
+                elif ret == -errno.ENOENT:
+                    return None
+                else:
+                    raise make_ex(ret, "error calling conf_get")
+        finally:
+            free(ret_buf)
+
+    def conf_set(self, option, val):
+        """
+        Sets a configuration value from a string.
+        
+        :param option: the configuration option to set
+        :param value: the value of the configuration option to set
+        """
+        self.require_state("configuring", "initialized", "mounted")
+
+        option = cstr(option, 'option')
+        val = cstr(val, 'val')
+        cdef:
+            char *_option = option
+            char *_val = val
+
+        with nogil:
+            ret = ceph_conf_set(self.cluster, _option, _val)
+        if ret != 0:
+            raise make_ex(ret, "error calling conf_set")
+
+    def init(self):
+        """
+        Initialize the filesystem client (but do not mount the filesystem yet)
+        """
+        self.require_state("configuring")
+        with nogil:
+            ret = ceph_init(self.cluster)
+        if ret != 0:
+            raise make_ex(ret, "error calling ceph_init")
+        self.state = "initialized"
+
+    def mount(self, mount_root=None, filesystem_name=None):
+        """
+        Perform a mount using the path for the root of the mount.
+        """
+        if self.state == "configuring":
+            self.init()
+        self.require_state("initialized")
+
+        # Configure which filesystem to mount if one was specified
+        if filesystem_name is None:
+            filesystem_name = b""
+        cdef:
+            char *_filesystem_name = filesystem_name
+        if filesystem_name:
+            with nogil:
+                ret = ceph_select_filesystem(self.cluster,
+                        _filesystem_name)
+            if ret != 0:
+                raise make_ex(ret, "error calling ceph_select_filesystem")
+
+        # Prepare mount_root argument, default to "/"
+        root = b"/" if mount_root is None else mount_root
+        cdef:
+            char *_mount_root = root
+
+        with nogil:
+            ret = ceph_mount(self.cluster, _mount_root)
+        if ret != 0:
+            raise make_ex(ret, "error calling ceph_mount")
+        self.state = "mounted"
+
+    def unmount(self):
+        """
+        Unmount a mount handle.
+        """
+        self.require_state("mounted")
+        with nogil:
+            ret = ceph_unmount(self.cluster)
+        if ret != 0:
+            raise make_ex(ret, "error calling ceph_unmount")
+        self.state = "initialized"
+
+    def abort_conn(self):
+        """
+        Abort mds connections.
+        """
+        self.require_state("mounted")
+        with nogil:
+            ret = ceph_abort_conn(self.cluster)
+        if ret != 0:
+            raise make_ex(ret, "error calling ceph_abort_conn")
+        self.state = "initialized"
+
+    def get_instance_id(self):
+        """
+        Get a global id for current instance
+        """
+        self.require_state("initialized", "mounted")
+        with nogil:
+            ret = ceph_get_instance_id(self.cluster)
+        return ret;
+
+    def statfs(self, path):
+        """
+        Perform a statfs on the ceph file system.  This call fills in file system wide statistics
+        into the passed in buffer.
+        
+        :param path: any path within the mounted filesystem
+        """
+        self.require_state("mounted")
+        path = cstr(path, 'path')
+        cdef:
+            char* _path = path
+            statvfs statbuf
+
+        with nogil:
+            ret = ceph_statfs(self.cluster, _path, &statbuf)
+        if ret < 0:
+            raise make_ex(ret, "statfs failed: %s" % path)
+        return {'f_bsize': statbuf.f_bsize,
+                'f_frsize': statbuf.f_frsize,
+                'f_blocks': statbuf.f_blocks,
+                'f_bfree': statbuf.f_bfree,
+                'f_bavail': statbuf.f_bavail,
+                'f_files': statbuf.f_files,
+                'f_ffree': statbuf.f_ffree,
+                'f_favail': statbuf.f_favail,
+                'f_fsid': statbuf.f_fsid,
+                'f_flag': statbuf.f_flag,
+                'f_namemax': statbuf.f_namemax}
+
+    def sync_fs(self):
+        """
+        Synchronize all filesystem data to persistent media
+        """
+        self.require_state("mounted")
+        with nogil:
+            ret = ceph_sync_fs(self.cluster)
+        if ret < 0:
+            raise make_ex(ret, "sync_fs failed")
+
+    def fsync(self, int fd, int syncdataonly):
+        """
+        Synchronize an open file to persistent media.
+        
+        :param fd: the file descriptor of the file to sync.
+        :param syncdataonly: a boolean whether to synchronize metadata and data (0)
+                             or just data (1).
+        """
+        self.require_state("mounted")
+        with nogil:
+            ret = ceph_fsync(self.cluster, fd, syncdataonly)
+        if ret < 0:
+            raise make_ex(ret, "fsync failed")
+
+    def getcwd(self):
+        """
+        Get the current working directory.
+        
+        :rtype the path to the current working directory
+        """
+        self.require_state("mounted")
+        with nogil:
+            ret = ceph_getcwd(self.cluster)
+        return ret
+
+    def chdir(self, path):
+        """
+        Change the current working directory.
+        
+        :param path the path to the working directory to change into.
+        """
+        self.require_state("mounted")
+
+        path = cstr(path, 'path')
+        cdef char* _path = path
+        with nogil:
+            ret = ceph_chdir(self.cluster, _path)
+        if ret < 0:
+            raise make_ex(ret, "chdir failed")
+
+    def opendir(self, path):
+        """
+        Open the given directory.
+        
+        :param path: the path name of the directory to open.  Must be either an absolute path
+                     or a path relative to the current working directory.
+        :rtype handle: the open directory stream handle
+        """
+        self.require_state("mounted")
+
+        path = cstr(path, 'path')
+        cdef:
+            char* _path = path
+            ceph_dir_result* handle
+        with nogil:
+            ret = ceph_opendir(self.cluster, _path, &handle);
+        if ret < 0:
+            raise make_ex(ret, "opendir failed")
+        d = DirResult()
+        d.lib = self
+        d.handle = handle
+        return d
+
+    def readdir(self, DirResult handle):
+        """
+        Get the next entry in an open directory.
+        
+        :param handle: the open directory stream handle
+        :rtype dentry: the next directory entry or None if at the end of the
+                       directory (or the directory is empty.  This pointer
+                       should not be freed by the caller, and is only safe to
+                       access between return and the next call to readdir or
+                       closedir.
+        """
+        self.require_state("mounted")
+
+        return handle.readdir()
+
+    def closedir(self, DirResult handle):
+        """
+        Close the open directory.
+        
+        :param handle: the open directory stream handle
+        """
+        self.require_state("mounted")
+
+        return handle.close()
+
+    def mkdir(self, path, mode):
+        """
+        Create a directory.
+ 
+        :param path: the path of the directory to create.  This must be either an
+                     absolute path or a relative path off of the current working directory.
+        :param mode the permissions the directory should have once created.
+        """
+
+        self.require_state("mounted")
+        path = cstr(path, 'path')
+        if not isinstance(mode, int):
+            raise TypeError('mode must be an int')
+        cdef:
+            char* _path = path
+            int _mode = mode
+        with nogil:
+            ret = ceph_mkdir(self.cluster, _path, _mode)
+        if ret < 0:
+            raise make_ex(ret, "error in mkdir {}".format(path.decode('utf-8')))
+
+    def chmod(self, path, mode) :
+        """
+        Change directory mode.
+        :param path: the path of the directory to create.  This must be either an
+                    absolute path or a relative path off of the current working directory.
+        :param mode the permissions the directory should have once created.
+        """
+        self.require_state("mounted")
+        path = cstr(path, 'path')
+        if not isinstance(mode, int):
+            raise TypeError('mode must be an int')
+        cdef:
+            char* _path = path
+            int _mode = mode
+        with nogil:
+            ret = ceph_chmod(self.cluster, _path, _mode)
+        if ret < 0:
+            raise make_ex(ret, "error in chmod {}".format(path.decode('utf-8')))
+
+    def chown(self, path, uid, gid, follow_symlink=True):
+        """
+        Change directory ownership
+        :param path: the path of the directory to change.
+        :param uid: the uid to set
+        :param gid: the gid to set
+        :param follow_symlink: perform the operation on the target file if @path
+                               is a symbolic link (default)
+        """
+        self.require_state("mounted")
+        path = cstr(path, 'path')
+        if not isinstance(uid, int):
+            raise TypeError('uid must be an int')
+        elif not isinstance(gid, int):
+            raise TypeError('gid must be an int')
+
+        cdef:
+            char* _path = path
+            int _uid = uid
+            int _gid = gid
+        if follow_symlink:
+            with nogil:
+                ret = ceph_chown(self.cluster, _path, _uid, _gid)
+        else:
+            with nogil:
+                ret = ceph_lchown(self.cluster, _path, _uid, _gid)
+        if ret < 0:
+            raise make_ex(ret, "error in chown {}".format(path.decode('utf-8')))
+
+    def lchown(self, path, uid, gid):
+        """
+        Change ownership of a symbolic link
+        :param path: the path of the symbolic link to change.
+        :param uid: the uid to set
+        :param gid: the gid to set
+        """
+        self.chown(path, uid, gid, follow_symlink=False)
+
+    def mkdirs(self, path, mode):
+        """
+        Create multiple directories at once.
+
+        :param path: the full path of directories and sub-directories that should
+                     be created.
+        :param mode the permissions the directory should have once created
+        """
+        self.require_state("mounted")
+        path = cstr(path, 'path')
+        if not isinstance(mode, int):
+            raise TypeError('mode must be an int')
+        cdef:
+            char* _path = path
+            int _mode = mode
+
+        with nogil:
+            ret = ceph_mkdirs(self.cluster, _path, _mode)
+        if ret < 0:
+            raise make_ex(ret, "error in mkdirs {}".format(path.decode('utf-8')))
+
+    def rmdir(self, path):
+        """
+        Remove a directory.
+         
+        :param path: the path of the directory to remove.
+        """
+        self.require_state("mounted")
+        path = cstr(path, 'path')
+        cdef char* _path = path
+        ret = ceph_rmdir(self.cluster, _path)
+        if ret < 0:
+            raise make_ex(ret, "error in rmdir {}".format(path.decode('utf-8')))
+
+    def open(self, path, flags, mode=0):
+        """
+        Create and/or open a file.
+         
+        :param path: the path of the file to open.  If the flags parameter includes O_CREAT,
+                     the file will first be created before opening.
+        :param flags: set of option masks that control how the file is created/opened.
+        :param mode: the permissions to place on the file if the file does not exist and O_CREAT
+                     is specified in the flags.
+        """
+        self.require_state("mounted")
+        path = cstr(path, 'path')
+
+        if not isinstance(mode, int):
+            raise TypeError('mode must be an int')
+        if isinstance(flags, str):
+            cephfs_flags = 0
+            if flags == '':
+                cephfs_flags = os.O_RDONLY
+            else:
+                access_flags = 0;
+                for c in flags:
+                    if c == 'r':
+                        access_flags = 1;
+                    elif c == 'w':
+                        access_flags = 2;
+                        cephfs_flags |= os.O_TRUNC | os.O_CREAT
+                    elif access_flags > 0 and c == '+':
+                        access_flags = 3;
+                    else:
+                        raise make_ex(errno.EOPNOTSUPP,
+                                      "open flags doesn't support %s" % c)
+
+                if access_flags == 1:
+                    cephfs_flags |= os.O_RDONLY;
+                elif access_flags == 2:
+                    cephfs_flags |= os.O_WRONLY;
+                else:
+                    cephfs_flags |= os.O_RDWR;
+
+        elif isinstance(flags, int):
+            cephfs_flags = flags
+        else:
+            raise TypeError("flags must be a string or an integer")
+
+        cdef:
+            char* _path = path
+            int _flags = cephfs_flags
+            int _mode = mode
+
+        with nogil:
+            ret = ceph_open(self.cluster, _path, _flags, _mode)
+        if ret < 0:
+            raise make_ex(ret, "error in open {}".format(path.decode('utf-8')))
+        return ret
+
+    def close(self, fd):
+        """
+        Close the open file.
+        
+        :param fd: the file descriptor referring to the open file.
+        """
+
+        self.require_state("mounted")
+        if not isinstance(fd, int):
+            raise TypeError('fd must be an int')
+        cdef int _fd = fd
+        with nogil:
+            ret = ceph_close(self.cluster, _fd)
+        if ret < 0:
+            raise make_ex(ret, "error in close")
+
+    def read(self, fd, offset, l):
+        """
+        Read data from the file.
+ 
+        :param fd : the file descriptor of the open file to read from.
+        :param offset : the offset in the file to read from.  If this value is negative, the
+                        function reads from the current offset of the file descriptor.
+        :param l : the flag to indicate what type of seeking to perform
+        """     
+        self.require_state("mounted")
+        if not isinstance(offset, int):
+            raise TypeError('offset must be an int')
+        if not isinstance(l, int):
+            raise TypeError('l must be an int')
+        if not isinstance(fd, int):
+            raise TypeError('fd must be an int')
+        cdef:
+            int _fd = fd
+            int64_t _offset = offset
+            int64_t _length = l
+
+            char *ret_buf
+            PyObject* ret_s = NULL
+
+        ret_s = PyBytes_FromStringAndSize(NULL, _length)
+        try:
+            ret_buf = PyBytes_AsString(ret_s)
+            with nogil:
+                ret = ceph_read(self.cluster, _fd, ret_buf, _length, _offset)
+            if ret < 0:
+                raise make_ex(ret, "error in read")
+
+            if ret != _length:
+                _PyBytes_Resize(&ret_s, ret)
+
+            return <object>ret_s
+        finally:
+            # We DECREF unconditionally: the cast to object above will have
+            # INCREFed if necessary. This also takes care of exceptions,
+            # including if _PyString_Resize fails (that will free the string
+            # itself and set ret_s to NULL, hence XDECREF).
+            ref.Py_XDECREF(ret_s)
+
+    def write(self, fd, buf, offset):
+        """
+        Write data to a file.
+       
+        :param fd : the file descriptor of the open file to write to
+        :param buf : the bytes to write to the file
+        :param offset : the offset of the file write into.  If this value is negative, the
+                        function writes to the current offset of the file descriptor.
+        """
+        self.require_state("mounted")
+        if not isinstance(fd, int):
+            raise TypeError('fd must be an int')
+        if not isinstance(buf, bytes):
+            raise TypeError('buf must be a bytes')
+        if not isinstance(offset, int):
+            raise TypeError('offset must be an int')
+
+        cdef:
+            int _fd = fd
+            char *_data = buf
+            int64_t _offset = offset
+
+            size_t length = len(buf)
+
+        with nogil:
+            ret = ceph_write(self.cluster, _fd, _data, length, _offset)
+        if ret < 0:
+            raise make_ex(ret, "error in write")
+        return ret
+
+    def flock(self, fd, operation, owner):
+        """
+        Apply or remove an advisory lock.
+        
+        :param fd: the open file descriptor to change advisory lock.
+        :param operation: the advisory lock operation to be performed on the file
+        :param owner: the user-supplied owner identifier (an arbitrary integer)
+        """
+        self.require_state("mounted")
+        if not isinstance(fd, int):
+            raise TypeError('fd must be an int')
+        if not isinstance(operation, int):
+            raise TypeError('operation must be an int')
+
+        cdef:
+            int _fd = fd
+            int _op = operation
+            uint64_t _owner = owner
+
+        with nogil:
+            ret = ceph_flock(self.cluster, _fd, _op, _owner)
+        if ret < 0:
+            raise make_ex(ret, "error in write")
+        return ret
+
+    def getxattr(self, path, name, size=255):
+        """
+         Get an extended attribute.
+         
+         :param path: the path to the file
+         :param name: the name of the extended attribute to get
+         :param size: the size of the pre-allocated buffer
+        """ 
+        self.require_state("mounted")
+
+        path = cstr(path, 'path')
+        name = cstr(name, 'name')
+
+        cdef:
+            char* _path = path
+            char* _name = name
+
+            size_t ret_length = size
+            char *ret_buf = NULL
+
+        try:
+            ret_buf = <char *>realloc_chk(ret_buf, ret_length)
+            with nogil:
+                ret = ceph_getxattr(self.cluster, _path, _name, ret_buf,
+                                    ret_length)
+
+            if ret < 0:
+                raise make_ex(ret, "error in getxattr")
+
+            return ret_buf[:ret]
+        finally:
+            free(ret_buf)
+
+    def setxattr(self, path, name, value, flags):
+        """
+        Set an extended attribute on a file.
+        
+       :param path: the path to the file.
+       :param name: the name of the extended attribute to set.
+       :param value: the bytes of the extended attribute value
+       """
+        self.require_state("mounted")
+
+        name = cstr(name, 'name')
+        path = cstr(path, 'path')
+        if not isinstance(flags, int):
+            raise TypeError('flags must be a int')
+        if not isinstance(value, bytes):
+            raise TypeError('value must be a bytes')
+
+        cdef:
+            char *_path = path
+            char *_name = name
+            char *_value = value
+            size_t _value_len = len(value)
+            int _flags = flags
+
+        with nogil:
+            ret = ceph_setxattr(self.cluster, _path, _name,
+                                _value, _value_len, _flags)
+        if ret < 0:
+            raise make_ex(ret, "error in setxattr")
+
+
+    def stat(self, path, follow_symlink=True):
+        """
+        Get a file's extended statistics and attributes.
+        
+        :param path: the file or directory to get the statistics of.
+        """
+        self.require_state("mounted")
+        path = cstr(path, 'path')
+
+        cdef:
+            char* _path = path
+            statx stx
+
+        if follow_symlink:
+            with nogil:
+                ret = ceph_statx(self.cluster, _path, &stx,
+                                 CEPH_STATX_BASIC_STATS_CDEF, 0)
+        else:
+            with nogil:
+                ret = ceph_statx(self.cluster, _path, &stx,
+                                 CEPH_STATX_BASIC_STATS_CDEF, AT_SYMLINK_NOFOLLOW_CDEF)
+
+        if ret < 0:
+            raise make_ex(ret, "error in stat: {}".format(path.decode('utf-8')))
+        return StatResult(st_dev=stx.stx_dev, st_ino=stx.stx_ino,
+                          st_mode=stx.stx_mode, st_nlink=stx.stx_nlink,
+                          st_uid=stx.stx_uid, st_gid=stx.stx_gid,
+                          st_rdev=stx.stx_rdev, st_size=stx.stx_size,
+                          st_blksize=stx.stx_blksize,
+                          st_blocks=stx.stx_blocks,
+                          st_atime=datetime.fromtimestamp(stx.stx_atime.tv_sec),
+                          st_mtime=datetime.fromtimestamp(stx.stx_mtime.tv_sec),
+                          st_ctime=datetime.fromtimestamp(stx.stx_ctime.tv_sec))
+
+    def lstat(self, path):
+        """
+        Get a file's extended statistics and attributes. When file's a
+        symbolic link, return the informaion of the link itself rather
+        than that of the file it points too.
+
+        :param path: the file or directory to get the statistics of.
+        """
+        return self.stat(path, follow_symlink=False)
+
+    def fstat(self, fd):
+        """
+        Get an open file's extended statistics and attributes.
+
+        :param fd: the file descriptor of the file to get statistics of.
+         """
+        self.require_state("mounted")
+        if not isinstance(fd, int):
+            raise TypeError('fd must be an int')
+
+        cdef:
+            int _fd = fd
+            statx stx
+
+        with nogil:
+            ret = ceph_fstatx(self.cluster, _fd, &stx,
+                              CEPH_STATX_BASIC_STATS_CDEF, 0)
+        if ret < 0:
+            raise make_ex(ret, "error in fsat")
+        return StatResult(st_dev=stx.stx_dev, st_ino=stx.stx_ino,
+                          st_mode=stx.stx_mode, st_nlink=stx.stx_nlink,
+                          st_uid=stx.stx_uid, st_gid=stx.stx_gid,
+                          st_rdev=stx.stx_rdev, st_size=stx.stx_size,
+                          st_blksize=stx.stx_blksize,
+                          st_blocks=stx.stx_blocks,
+                          st_atime=datetime.fromtimestamp(stx.stx_atime.tv_sec),
+                          st_mtime=datetime.fromtimestamp(stx.stx_mtime.tv_sec),
+                          st_ctime=datetime.fromtimestamp(stx.stx_ctime.tv_sec))
+    
+    def statx(self, path, mask, flag):
+        """
+        Get a file's extended statistics and attributes.
+
+        :param path: the file or directory to get the statistics of.
+        :param mask: want bitfield of CEPH_STATX_* flags showing designed attributes.
+        :param flag: bitfield that can be used to set AT_* modifier flags (only AT_NO_ATTR_SYNC and AT_SYMLINK_NOFOLLOW)
+        """
+
+        self.require_state("mounted")
+        path = cstr(path, 'path')
+        if not isinstance(mask, int):
+            raise TypeError('flag must be a int')
+        if not isinstance(flag, int):
+            raise TypeError('flag must be a int')
+
+        cdef:
+            char* _path = path
+            statx stx
+            int _mask = mask
+            int _flag = flag
+            dict_result = dict()
+
+        with nogil:
+            ret = ceph_statx(self.cluster, _path, &stx, _mask, _flag)
+        if ret < 0:
+            raise make_ex(ret, "error in stat: %s" % path)
+
+        if (_mask & CEPH_STATX_MODE):
+            dict_result["mode"] = stx.stx_mode
+        if (_mask & CEPH_STATX_NLINK):
+            dict_result["nlink"] = stx.stx_nlink
+        if (_mask & CEPH_STATX_UID):
+            dict_result["uid"] = stx.stx_uid
+        if (_mask & CEPH_STATX_GID):
+            dict_result["gid"] = stx.stx_gid
+        if (_mask & CEPH_STATX_RDEV):
+            dict_result["rdev"] = stx.stx_rdev
+        if (_mask & CEPH_STATX_ATIME):
+            dict_result["atime"] = datetime.fromtimestamp(stx.stx_atime.tv_sec)
+        if (_mask & CEPH_STATX_MTIME):
+            dict_result["mtime"] = datetime.fromtimestamp(stx.stx_mtime.tv_sec)
+        if (_mask & CEPH_STATX_CTIME):
+            dict_result["ctime"] = datetime.fromtimestamp(stx.stx_ctime.tv_sec)
+        if (_mask & CEPH_STATX_INO):
+            dict_result["ino"] = stx.stx_ino
+        if (_mask & CEPH_STATX_SIZE):
+            dict_result["size"] = stx.stx_size
+        if (_mask & CEPH_STATX_BLOCKS):
+            dict_result["blocks"] = stx.stx_blocks
+        if (_mask & CEPH_STATX_BTIME):
+            dict_result["btime"] = datetime.fromtimestamp(stx.stx_btime.tv_sec)
+        if (_mask & CEPH_STATX_VERSION):
+            dict_result["version"] = stx.stx_version
+
+        return dict_result
+
+    def symlink(self, existing, newname):
+        """
+        Creates a symbolic link.
+       
+        :param existing: the path to the existing file/directory to link to.
+        :param newname: the path to the new file/directory to link from.
+        """
+        self.require_state("mounted")
+        existing = cstr(existing, 'existing')
+        newname = cstr(newname, 'newname')
+        cdef:
+            char* _existing = existing
+            char* _newname = newname
+
+        with nogil:
+            ret = ceph_symlink(self.cluster, _existing, _newname)
+        if ret < 0:
+            raise make_ex(ret, "error in symlink")
+    
+    def link(self, existing, newname):
+        """
+        Create a link.
+        
+        :param existing: the path to the existing file/directory to link to.
+        :param newname: the path to the new file/directory to link from.
+        """
+
+        self.require_state("mounted")
+        existing = cstr(existing, 'existing')
+        newname = cstr(newname, 'newname')
+        cdef:
+            char* _existing = existing
+            char* _newname = newname
+        
+        with nogil:
+            ret = ceph_link(self.cluster, _existing, _newname)
+        if ret < 0:
+            raise make_ex(ret, "error in link")    
+    
+    def readlink(self, path, size):
+        """
+        Read a symbolic link.
+      
+        :param path: the path to the symlink to read
+        :param size: the length of the buffer
+        :rtype buf: buffer to hold the path of the file that the symlink points to.
+        """
+        self.require_state("mounted")
+        path = cstr(path, 'path')
+
+        cdef:
+            char* _path = path
+            int64_t _size = size
+            char *buf = NULL
+
+        try:
+            buf = <char *>realloc_chk(buf, _size)
+            with nogil:
+                ret = ceph_readlink(self.cluster, _path, buf, _size)
+            if ret < 0:
+                raise make_ex(ret, "error in readlink")
+            return buf[:ret]
+        finally:
+            free(buf)
+
+    def unlink(self, path):
+        """
+        Removes a file, link, or symbolic link.  If the file/link has multiple links to it, the
+        file will not disappear from the namespace until all references to it are removed.
+        
+        :param path: the path of the file or link to unlink.
+        """
+        self.require_state("mounted")
+        path = cstr(path, 'path')
+        cdef char* _path = path
+        with nogil:
+            ret = ceph_unlink(self.cluster, _path)
+        if ret < 0:
+            raise make_ex(ret, "error in unlink: {}".format(path.decode('utf-8')))
+
+    def rename(self, src, dst):
+        """
+        Rename a file or directory.
+        
+        :param src: the path to the existing file or directory.
+        :param dst: the new name of the file or directory.
+        """
+        
+        self.require_state("mounted")
+
+        src = cstr(src, 'source')
+        dst = cstr(dst, 'destination')
+
+        cdef:
+            char* _src = src
+            char* _dst = dst
+
+        with nogil:
+            ret = ceph_rename(self.cluster, _src, _dst)
+        if ret < 0:
+            raise make_ex(ret, "error in rename {} to {}".format(src.decode(
+                          'utf-8'), dst.decode('utf-8')))
+
+    def mds_command(self, mds_spec, args, input_data):
+        """
+        :return 3-tuple of output status int, output status string, output data
+        """
+        mds_spec = cstr(mds_spec, 'mds_spec')
+        args = cstr_list(args, 'args')
+        input_data = cstr(input_data, 'input_data')
+
+        cdef:
+            char *_mds_spec = opt_str(mds_spec)
+            char **_cmd = to_bytes_array(args)
+            size_t _cmdlen = len(args)
+
+            char *_inbuf = input_data
+            size_t _inbuf_len = len(input_data)
+
+            char *_outbuf = NULL
+            size_t _outbuf_len = 0
+            char *_outs = NULL
+            size_t _outs_len = 0
+
+        try:
+            with nogil:
+                ret = ceph_mds_command(self.cluster, _mds_spec,
+                                       <const char **>_cmd, _cmdlen,
+                                       <const char*>_inbuf, _inbuf_len,
+                                       &_outbuf, &_outbuf_len,
+                                       &_outs, &_outs_len)
+            my_outs = decode_cstr(_outs[:_outs_len])
+            my_outbuf = _outbuf[:_outbuf_len]
+            if _outs_len:
+                ceph_buffer_free(_outs)
+            if _outbuf_len:
+                ceph_buffer_free(_outbuf)
+            return (ret, my_outbuf, my_outs)
+        finally:
+            free(_cmd)
+
+    def umask(self, mode) :
+        self.require_state("mounted")
+        cdef:
+            mode_t _mode = mode
+        with nogil:
+            ret = ceph_umask(self.cluster, _mode)
+        if ret < 0:
+            raise make_ex(ret, "error in umask")
+        return ret
+
+    def lseek(self, fd, offset, whence):
+        """
+        Set the file's current position.
+ 
+        :param fd : the file descriptor of the open file to read from.
+        :param offset : the offset in the file to read from.  If this value is negative, the
+                        function reads from the current offset of the file descriptor.
+        :param whence : the flag to indicate what type of seeking to performs:SEEK_SET, SEEK_CUR, SEEK_END
+        """     
+        self.require_state("mounted")
+        if not isinstance(fd, int):
+            raise TypeError('fd must be an int')
+        if not isinstance(offset, int):
+            raise TypeError('offset must be an int')
+        if not isinstance(whence, int):
+            raise TypeError('whence must be an int')
+
+        cdef:
+            int _fd = fd
+            int64_t _offset = offset
+            int64_t _whence = whence
+
+        with nogil:
+            ret = ceph_lseek(self.cluster, _fd, _offset, _whence)
+
+        if ret < 0:
+            raise make_ex(ret, "error in lseek")
+
+        return ret      
+
+    def utime(self, path, times=None):
+        """
+        Set access and modification time for path
+
+        :param path: file path for which timestamps have to be changed
+        :param times: if times is not None, it must be a tuple (atime, mtime)
+        """
+
+        self.require_state("mounted")
+        path = cstr(path, 'path')
+        if times:
+            if not isinstance(times, tuple):
+                raise TypeError('times must be a tuple')
+            if not isinstance(times[0], int):
+                raise TypeError('atime must be an int')
+            if not isinstance(times[1], int):
+                raise TypeError('mtime must be an int')
+        actime = modtime = int(time.time())
+        if times:
+            actime = times[0]
+            modtime = times[1]
+
+        cdef:
+            char *pth = path
+            utimbuf buf = utimbuf(actime, modtime)
+        with nogil:
+            ret = ceph_utime(self.cluster, pth, &buf)
+        if ret < 0:
+            raise make_ex(ret, "error in utime {}".format(path.decode('utf-8')))
+
+    def futime(self, fd, times=None):
+        """
+        Set access and modification time for a file pointed by descriptor
+
+        :param fd: file descriptor of the open file
+        :param times: if times is not None, it must be a tuple (atime, mtime)
+        """
+
+        self.require_state("mounted")
+        if not isinstance(fd, int):
+            raise TypeError('fd must be an int')
+        if times:
+            if not isinstance(times, tuple):
+                raise TypeError('times must be a tuple')
+            if not isinstance(times[0], int):
+                raise TypeError('atime must be an int')
+            if not isinstance(times[1], int):
+                raise TypeError('mtime must be an int')
+        actime = modtime = int(time.time())
+        if times:
+            actime = times[0]
+            modtime = times[1]
+
+        cdef:
+            int _fd = fd
+            utimbuf buf = utimbuf(actime, modtime)
+        with nogil:
+            ret = ceph_futime(self.cluster, _fd, &buf)
+        if ret < 0:
+            raise make_ex(ret, "error in futime")
+
+    def utimes(self, path, times=None, follow_symlink=True):
+        """
+        Set access and modification time for path
+
+        :param path: file path for which timestamps have to be changed
+        :param times: if times is not None, it must be a tuple (atime, mtime)
+        :param follow_symlink: perform the operation on the target file if @path
+                               is a symbolic link (default)
+        """
+
+        self.require_state("mounted")
+        path = cstr(path, 'path')
+        if times:
+            if not isinstance(times, tuple):
+                raise TypeError('times must be a tuple')
+            if not isinstance(times[0], (int, float)):
+                raise TypeError('atime must be an int or a float')
+            if not isinstance(times[1], (int, float)):
+                raise TypeError('mtime must be an int or a float')
+        actime = modtime = time.time()
+        if times:
+            actime = float(times[0])
+            modtime = float(times[1])
+
+        cdef:
+            char *pth = path
+            timeval *buf = [to_timeval(actime), to_timeval(modtime)]
+        if follow_symlink:
+            with nogil:
+                ret = ceph_utimes(self.cluster, pth, buf)
+        else:
+            with nogil:
+                ret = ceph_lutimes(self.cluster, pth, buf)
+        if ret < 0:
+            raise make_ex(ret, "error in utimes {}".format(path.decode('utf-8')))
+
+    def lutimes(self, path, times=None):
+        """
+        Set access and modification time for a file. If the file is a symbolic
+        link do not follow to the target.
+
+        :param path: file path for which timestamps have to be changed
+        :param times: if times is not None, it must be a tuple (atime, mtime)
+        """
+        self.utimes(path, times=times, follow_symlink=False)
+
+    def futimes(self, fd, times=None):
+        """
+        Set access and modification time for a file pointer by descriptor
+
+        :param fd: file descriptor of the open file
+        :param times: if times is not None, it must be a tuple (atime, mtime)
+        """
+
+        self.require_state("mounted")
+        if not isinstance(fd, int):
+            raise TypeError('fd must be an int')
+        if times:
+            if not isinstance(times, tuple):
+                raise TypeError('times must be a tuple')
+            if not isinstance(times[0], (int, float)):
+                raise TypeError('atime must be an int or a float')
+            if not isinstance(times[1], (int, float)):
+                raise TypeError('mtime must be an int or a float')
+        actime = modtime = time.time()
+        if times:
+            actime = float(times[0])
+            modtime = float(times[1])
+
+        cdef:
+            int _fd = fd
+            timeval *buf = [to_timeval(actime), to_timeval(modtime)]
+        with nogil:
+                ret = ceph_futimes(self.cluster, _fd, buf)
+        if ret < 0:
+            raise make_ex(ret, "error in futimes")
+
+    def futimens(self, fd, times=None):
+        """
+        Set access and modification time for a file pointer by descriptor
+
+        :param fd: file descriptor of the open file
+        :param times: if times is not None, it must be a tuple (atime, mtime)
+        """
+
+        self.require_state("mounted")
+        if not isinstance(fd, int):
+            raise TypeError('fd must be an int')
+        if times:
+            if not isinstance(times, tuple):
+                raise TypeError('times must be a tuple')
+            if not isinstance(times[0], (int, float)):
+                raise TypeError('atime must be an int or a float')
+            if not isinstance(times[1], (int, float)):
+                raise TypeError('mtime must be an int or a float')
+        actime = modtime = time.time()
+        if times:
+            actime = float(times[0])
+            modtime = float(times[1])
+
+        cdef:
+            int _fd = fd
+            timespec *buf = [to_timespec(actime), to_timespec(modtime)]
+        with nogil:
+                ret = ceph_futimens(self.cluster, _fd, buf)
+        if ret < 0:
+            raise make_ex(ret, "error in futimens")