- user=
arg specifies the username to connect as. If
this is not given, then the environment variable USER is used. This option can also take the
form "user%password" or "workgroup/user" or
"workgroup/user%password" to allow the password and workgroup
to be specified as part of the username.
Note
The cifs vfs accepts the parameter user=, or for users familiar with smbfs it accepts the longer form of the parameter username=. Similarly the longer smbfs style parameter names may be accepted as synonyms for the shorter cifs parameters pass=,dom= and cred=.
- password=
arg specifies the CIFS password. If this
option is not given then the environment variable
PASSWD is used. If the password is not specified
directly or indirectly via an argument to mount mount.cifs will prompt
for a password, unless the guest option is specified.
Note that a password which contains the delimiter
character (i.e. a comma ',') will fail to be parsed correctly
on the command line. However, the same password defined
in the PASSWD environment variable or via a credentials file (see
below) or entered at the password prompt will be read correctly.
- credentials=
filename
specifies a file that contains a username
and/or password. The format of the file is:
username=value
password=value
This is preferred over having passwords in plaintext in a
shared file, such as /etc/fstab. Be sure to protect any
credentials file properly.
- uid=
arg sets the uid that will own all files on
the mounted filesystem.
It may be specified as either a username or a numeric uid.
This parameter is ignored when the target server supports
the CIFS Unix extensions.
- gid=
arg sets the gid that will own all files on
the mounted filesystem.
It may be specified as either a groupname or a numeric
gid. This parameter is ignored when the target server supports
the CIFS Unix extensions.
- port=
arg sets the port number on the server to attempt to contact to negotiate
CIFS support. If the CIFS server is not listening on this port or
if it is not specified, the default ports will be tried i.e.
port 445 is tried and if no response then port 139 is tried.
- netbiosname=
arg When mounting to servers via port 139, specifies the RFC1001
source name to use to represent the client netbios machine
name when doing the RFC1001 netbios session initialize.
- file_mode=
arg If the server does not support the CIFS Unix extensions this
overrides the default file mode.
- dir_mode=
arg If the server does not support the CIFS Unix extensions this
overrides the default mode for directories.
- ip=
arg sets the destination host or IP address.
- domain=
arg sets the domain (workgroup) of the user
- guest
don't prompt for a password
- iocharset
Charset used to convert local path names to and from
Unicode. Unicode is used by default for network path
names if the server supports it. If iocharset is
not specified then the nls_default specified
during the local client kernel build will be used.
If server does not support Unicode, this parameter is
unused.
- ro
mount read-only
- rw
mount read-write
- setuids
If the CIFS Unix extensions are negotiated with the server
the client will attempt to set the effective uid and gid of
the local process on newly created files, directories, and
devices (create, mkdir, mknod). If the CIFS Unix Extensions
are not negotiated, for newly created files and directories
instead of using the default uid and gid specified on the
the mount, cache the new file's uid and gid locally which means
that the uid for the file can change when the inode is
reloaded (or the user remounts the share).
- nosetuids
The client will not attempt to set the uid and gid on
on newly created files, directories, and devices (create,
mkdir, mknod) which will result in the server setting the
uid and gid to the default (usually the server uid of the
user who mounted the share). Letting the server (rather than
the client) set the uid and gid is the default.If the CIFS
Unix Extensions are not negotiated then the uid and gid for
new files will appear to be the uid (gid) of the mounter or the
uid (gid) parameter specified on the mount.
- perm
Client does permission checks (vfs_permission check of uid
and gid of the file against the mode and desired operation),
Note that this is in addition to the normal ACL check on the
target machine done by the server software.
Client permission checking is enabled by default.
- noperm
Client does not do permission checks. This can expose
files on this mount to access by other users on the local
client system. It is typically only needed when the server
supports the CIFS Unix Extensions but the UIDs/GIDs on the
client and server system do not match closely enough to allow
access by the user doing the mount.
Note that this does not affect the normal ACL check on the
target machine done by the server software (of the server
ACL against the user name provided at mount time).
- directio
Do not do inode data caching on files opened on this mount.
This precludes mmaping files on this mount. In some cases
with fast networks and little or no caching benefits on the
client (e.g. when the application is doing large sequential
reads bigger than page size without rereading the same data)
this can provide better performance than the default
behavior which caches reads (readahead) and writes
(writebehind) through the local Linux client pagecache
if oplock (caching token) is granted and held. Note that
direct allows write operations larger than page size
to be sent to the server. On some kernels this requires the cifs.ko module
to be built with the CIFS_EXPERIMENTAL configure option.
- mapchars
Translate six of the seven reserved characters (not backslash, but including the colon, question mark, pipe, asterik, greater than and less than characters)
to the remap range (above 0xF000), which also
allows the CIFS client to recognize files created with
such characters by Windows's POSIX emulation. This can
also be useful when mounting to most versions of Samba
(which also forbids creating and opening files
whose names contain any of these seven characters).
This has no effect if the server does not support
Unicode on the wire.
- nomapchars
Do not translate any of these seven characters (default)
- intr
currently unimplemented
- nointr
(default) currently unimplemented
- hard
The program accessing a file on the cifs mounted file system will hang when the
server crashes.
- soft
(default) The program accessing a file on the cifs mounted file system will not hang when the server crashes and will return errors to the user application.
- noacl
Do not allow POSIX ACL operations even if server would support them.
The CIFS client can get and set POSIX ACLs (getfacl, setfacl) to Samba servers
version 3.10 and later. Setting POSIX ACLs requires enabling both XATTR and
then POSIX support in the CIFS configuration options when building the cifs
module. POSIX ACL support can be disabled on a per mount basic by specifying
"noacl" on mount.
- nocase
Request case insensitive path name matching (case
sensitive is the default if the server suports it).
- sec=
Security mode. Allowed values are:
none attempt to connection as a null user (no name)
krb5 Use Kerberos version 5 authentication
krb5i Use Kerberos authentication and packet signing
ntlm Use NTLM password hashing (default)
ntlmi Use NTLM password hashing with signing (if
/proc/fs/cifs/PacketSigningEnabled on or if
server requires signing also can be the default)
ntlmv2 Use NTLMv2 password hashing
ntlmv2i Use NTLMv2 password hashing with packet signing
[NB This [sec parameter] is under development and expected to be available in cifs kernel module 1.40 and later]
- nobrl
Do not send byte range lock requests to the server.
This is necessary for certain applications that break
with cifs style mandatory byte range locks (and most
cifs servers do not yet support requesting advisory
byte range locks).
- sfu
When the CIFS Unix Extensions are not negotiated, attempt to
create device files and fifos in a format compatible with
Services for Unix (SFU). In addition retrieve bits 10-12
of the mode via the SETFILEBITS extended attribute (as
SFU does). In the future the bottom 9 bits of the mode
mode also will be emulated using queries of the security
descriptor (ACL). [NB: requires version 1.39 or later
of the CIFS VFS. To recognize symlinks and be able
to create symlinks in an SFU interoperable form
requires version 1.40 or later of the CIFS VFS kernel module.
- serverino
Use inode numbers (unique persistent file identifiers)
returned by the server instead of automatically generating
temporary inode numbers on the client. Although server inode numbers
make it easier to spot hardlinked files (as they will have
the same inode numbers) and inode numbers may be persistent (which is
userful for some sofware),
the server does not guarantee that the inode numbers
are unique if multiple server side mounts are exported under a
single share (since inode numbers on the servers might not
be unique if multiple filesystems are mounted under the same
shared higher level directory). Note that not all
servers support returning server inode numbers, although
those that support the CIFS Unix Extensions, and Windows 2000 and
later servers typically do support this (although not necessarily
on every local server filesystem). Parameter has no effect if
the server lacks support for returning inode numbers or equivalent.
- noserverino
client generates inode numbers (rather than using the actual one
from the server) by default.
- nouser_xattr
(default) Do not allow getfattr/setfattr to get/set xattrs, even if server would support it otherwise.
- rsize=
arg default network read size
- wsize=
arg default network write size
- --verbose
Print additional debugging information for the mount. Note that this parameter must be specified before the -o. For example:
mount -t cifs //server/share /mnt --verbose -o user=username