mount_smbfs(1M) System Administration Commands mount_smbfs(1M)NAME
mount_smbfs, umount_smbfs - mount and unmount a shared resource from a
CIFS file server
SYNOPSIS
/sbin/mount [-F smbfs] [generic-options] [-o name=value] [-O] resource
/sbin/mount [-F smbfs] [generic-options] [-o name=value] [-O] mount-point
/sbin/mount [-F smbfs] [generic-options] [-o name=value]
[-O] resource mount-point
/sbin/umount [-F smbfs] [generic-options] mount-point
DESCRIPTION
The mount utility attaches a named resource, resource, to the file sys‐
tem hierarchy at the path name location, mount-point, which must
already exist.
If mount-point has any contents prior to the mount operation, those
contents remain hidden until the resource is unmounted. An authorized
user with the SYS_MOUNT privilege can perform a mount operation. Also,
a user can perform SMBFS mount operations on a directory the user owns.
If the resource is listed in the /etc/vfstab file, you can specify
either resource or mount-point as the mount command will consult the
/etc/vfstab file for more information. If the -F option is omitted,
mount takes the file system type from the entry in the /etc/vfstab
file.
If the resource is not listed in the /etc/vfstab file, the command line
must specify both resource and mount-point.
The umount utility detaches a mounted file system from the file system
hierarchy. An authorized user with the SYS_MOUNT privilege can perform
a umount operation. Also, a user can perform SMBFS unmount operations
on a directory the user owns.
The network/smb/client service must be enabled to successfully mount a
CIFS share. This service is enabled, by default.
To enable the service, enter the following svcadm(1M) command:
# svcadm enable network/smb/client
Operands
The mount command supports the following operands:
resource //[workgroup;][user[:password]@]server/share
The name of the resource to be mounted. In addition to its name,
you can specify the following information about the resource:
o password is the password associated with user. If pass‐
word is not specified, the mount first attempts to use
the password stored by the smbutil login command (if
any). If that password fails to authenticate, the
mount_smbfs prompts you for a password.
o server is the DNS or NetBIOS name of the remote com‐
puter.
o share is the resource name on the remote server.
o user is the remote user name. If user is omitted, the
logged in user ID is used.
o workgroup is the name of the workgroup or the Windows
domain in which the user name is defined.
If the resource includes a workgroup, you must escape
the semicolon that appears after the workgroup name to
prevent it from being interpreted by the command shell.
For instance, surround the entire resource name with
double quotes: mount -F smbfs "//SALES;george@RSERVER"
/mnt.
mount-point
The path to the location where the file system is to be mounted or
unmounted. The mount command maintains a table of mounted file sys‐
tems in the /etc/mnttab file. See the mnttab(4) man page.
OPTIONS
See the mount(1M) man page for the list of supported generic-options.
-o name=value or
-o name
Sets the file system-specific properties. You can specify more than
one name-value pair as a list of comma-separated pairs. No spaces
are permitted in the list. The properties are as follows:
acdirmax=n
Hold cached attributes for no more than n seconds after direc‐
tory update. The default value is 60.
acdirmin=n
Hold cached attributes for at least n seconds after directory
update. The default value is 30.
acregmax=n
Hold cached attributes for no more than n seconds after file
modification. The default value is 60.
acregmin=n
Hold cached attributes for at least n seconds after file modi‐
fication. The default value is 3.
actimeo=n
Set minimum and maximum times for regular files and directories
to n seconds. See "File Attributes," below, for a description
of the effect of setting this option to 0.
See "Specifying Values for Attribute Cache Duration Options,"
below, for a description of how acdirmax, acdirmin, acregmax,
acregmin, and actimeo are parsed on a mount command line.
dirperms=octaltriplet
Specifies the permissions to be assigned to directories. The
value must be specified as an octal triplet, such as 755. The
default value for the directory mode is taken from the
fileperms setting, with execute permission added where
fileperms has read permission.
Note that these permissions have no relation to the rights
granted by the CIFS server.
fileperms=octaltriplet
Specifies the permissions to be assigned to files. The value
must be specified as an octal triplet, such as 644. The default
value is 700.
Note that these permissions have no relation to the rights
granted by the CIFS server.
gid=groupid
Assigns the specified group ID to files. The default value is
the group ID of the directory where the volume is mounted.
intr|nointr
Enable (or disable) cancellation of smbfs(7FS) I/O operations
when the user interrupts the calling thread (for example, by
hitting Ctrl-C while an operation is underway). The default is
intr (interruption enabled), so cancellation is normally
allowed.
noac
Suppress attribute caching. Local stat(2) calls always request
attributes from the CIFS server.
noprompt
Suppresses the prompting for a password when mounting a share.
This property enables you to permit anonymous access to a
share. Anonymous access does not require a password.
The mount operation fails if a password is required, the
noprompt property is set, and no password is stored by the
smbutil login command.
retry_count=number
Specifies the number of SMBFS retries to attempt before the
connection is marked as broken. By default, 4 attempts are
made.
The retry_count property value set by the mount command over‐
rides the global value set in SMF or the value set in your
.nsmbrc file.
timeout=seconds
Specifies the CIFS request timeout. By default, the timeout is
15 seconds.
The timeout property value set by the mount command overrides
the global value set in SMF or the value set in your .nsmbrc
file.
uid=userid
Assigns the specified user ID files. The default value is the
owner ID of the directory where the volume is mounted.
xattr|noxattr
Enable (or disable) Solaris Extended Attributes in this mount
point. This option defaults to xattr (enabled Extended
Attributes), but note: if the CIFS server does not support CIFS
"named streams", smbfs(7FS) forces this option to noxattr. When
a mount has the noxattr option, attempts to use Solaris
Extended attributes fail with EINVAL.
-O
Overlays mount. Allow the file system to be mounted over an exist‐
ing mount point, making the underlying file system inaccessible. If
a mount is attempted on a pre-existing mount point without setting
this flag, the mount fails, producing the error "device busy."
FILE ATTRIBUTES
To improve smbfs performance, file attributes are cached. File modifi‐
cation times get updated whenever any local modifications occur. How‐
ever, file access times can be temporarily out-of-date until the cache
gets refreshed.
The attribute cache retains file attributes on the client. Attributes
for a file are assigned a time to be flushed. If the file is modified
before the flush time, then the flush time is extended by the time
since the last modification (under the assumption that files that
changed recently are likely to change soon). There is a minimum and
maximum flush time extension for regular files and for directories.
Setting actimeo=n sets flush time to n seconds for both regular files
and directories.
Setting actimeo=n disables attribute caching on the client. This means
that every reference to attributes is satisfied directly from the
server. While this guarantees that the client always has the latest
file attributes from the server, it has an adverse effect on perfor‐
mance through additional latency, network load, and server load.
Setting the noac option also disables attribute caching. When smbfs is
enhanced to support write caching, this option will have the further
effect of disabling that write caching.
SPECIFYING VALUES FOR ATTRIBUTE CACHE DURATION OPTIONS
The attribute cache duration options are acdirmax, acdirmin, acregmax,
acregmin, and actimeo, as described under OPTIONS, above. A value spec‐
ified for actimeo sets the values of all attribute cache duration
options except for any of these options specified following actimeo on
a mount command line. For example, consider the following command:
# mount -F smbfs -o acdirmax=10,actimeo=1000 \
//server/share /mountpoint
Because actimeo is the last duration option in the command line, its
value (1000) becomes the setting for all of the duration options,
including acdirmax. Now consider:
# mount -F smbfs -o actimeo=1000,acdirmax=10 \
//server/share /mountpoint
Because the acdirmax option follows actimeo on the command line, it is
assigned the value specified (10). The remaining duration options are
set to the value of actimeo (1000).
EXAMPLES
Example 1 Mounting an SMBFS Share
The following example shows how to mount the /tmp share from the nano
server in the SALES workgroup on the local /mnt mount point. You must
supply the password for the root user to successfully perform the mount
operation.
# mount -F smbfs "//SALES;root@nano.sfbay/tmp" /mnt
Password:
Example 2 Verifying That an SMBFS File System Is Mounted
The following example shows how to mount the /tmp share from the nano
server on the local /mnt mount point. You must supply the password for
the root user to successfully perform the mount operation.
# mount -F smbfs //root@nano.sfbay/tmp /mnt
Password:
You can verify that the share is mounted in the following ways:
o View the file system entry in the /etc/mnttab file.
# grep root /etc/mnttab
//root@nano.sfbay/tmp /mnt smbfs dev=4900000 1177097833
o View the output of the mount command.
# mount | grep root
/mnt on //root@nano.sfbay/tmp read/write/setuid/devices/dev=4900000 on
Fri Apr 20 13:37:13 2007
o View the output of the df /mnt command.
# df /mnt
/mnt (//root@nano.sfbay/tmp): 3635872 blocks -1 files
Obtain information about the mounted share by viewing the output of the
df -k /mnt command.
# df -k /mnt
Filesystem kbytes used avail capacity Mounted on
//root@nano.sfbay/tmp
1882384 64448 1817936 4% /mnt
Example 3 Unmounting a CIFS Share
This example assumes that a CIFS share has been mounted on the /mnt
mount point. The following command line unmounts the share from the
mount point.
# umount /mnt
FILES
/etc/mnttab
Table of mounted file systems.
/etc/dfs/fstypes
Default distributed file system type.
/etc/vfstab
Table of automatically mounted resources.
$HOME/.nsmbrc
User-settable mount point configuration file to store the descrip‐
tion for each connection.
ATTRIBUTES
See the attributes(5) man page for descriptions of the following
attributes:
┌─────────────────────────────┬─────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│Availability │SUNWsmbfscu │
├─────────────────────────────┼─────────────────────────────┤
│Interface Stability │Committed │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOsmbutil(1), mount(1M), mountall(1M), svcadm(1M), acl(2), fcntl(2),
link(2), mknod(2), mount(2), stat(2), symlink(2), umount(2), mnttab(4),
nsmbrc(4), vfstab(4), attributes(5), pcfs(7FS), smbfs(7FS)AUTHORS
This manual page contains material originally authored by Boris Popov,
bpATbutya.kz, bpATFreeBSD.org.
NOTES
The Solaris CIFS client always attempts to use gethostbyname() to
resolve host names. If the host name cannot be resolved, the CIFS
client uses NetBIOS name resolution (NBNS). By default, the Solaris
CIFS client permits the use of NBNS to enable Solaris CIFS clients in
Windows environments to work without additional configuration.
Since NBNS has been exploited in the past, you might want to disable
it. To disable NBNS, set the nbns-enabled service management facility
property to false. By default, nbns-enabled is set to true.
If the directory on which a file system is to be mounted is a symbolic
link, the file system is mounted on the directory to which the symbolic
link refers, rather than being mounted on top of the symbolic link
itself.
SunOS 5.11 17 Dec 2009 mount_smbfs(1M)
