.TH KSMBD.CONF "5" "" "ksmbd-tools 3.5.2" "File Formats and Conventions"
.SH NAME
ksmbd.conf \- the configuration file for ksmbd.mountd
.SH DESCRIPTION
\fBksmbd.conf\fR is the configuration file for \fBksmbd.mountd\fP(8) user mode daemon.
\fBksmbd.addshare\fP(8) can be used for configuring shares for \fBksmbd.conf\fR.
\fBksmbd.addshare\fR modifies \fBksmbd.conf\fR such that its existing formatting is not retained.
\fBksmbd.addshare\fR notifies \fBksmbd.mountd\fR of changes, if it had made any, by sending the \fBSIGHUP\fR signal to \fBksmbd.mountd\fR.
Changes made with \fBksmbd.addshare\fR will never require restarting \fBksmbd.mountd\fR and \fBksmbd\fR to take effect.
\fBksmbd.control --reload\fR can be used for notifying \fBksmbd.mountd\fR of changes when not using \fBksmbd.addshare\fR.
\fBksmbd.conf\fR is expected to be at \fB/etc/ksmbd/ksmbd.conf\fR by default. \" PATH_SMBCONF
A configuration file that may serve as an example can be found at \fB/etc/ksmbd/ksmbd.conf.example\fR.
.SH "FILE FORMAT"
\fBksmbd.conf\fR consists of sections (i.e. groups) with each section marking the end of the previous one.
A section begins with the section name enclosed in brackets (\fB[]\fR) followed by a newline.
A section may contain parameters separated by newlines.
A parameter consists of a name (i.e. a key) and a value, in that order, separated by an equal sign (\fB=\fR).
A name may contain leading and trailing tabs and spaces.
A value, which begins immediately after the equal sign, may contain leading tabs and spaces or be empty.
A value may be a list of multiple values separated by commas, tabs, and spaces.
For a list of users, all users in a system group are given by giving the group name prefixed with an at (\fB@\fR).
A value may have a number suffix, which is either \fBK\R, \fBM\R, \fBG\R, \fBT\R, \fBP\R, or \fBE\R.
A semicolon (\fB;\fR) or a hash (\fB#\fR) marks the beginning of a comment which continues until the end of the line.
.SH SHARES
Each section name, except that of the \fBglobal\fR section, defines a shared resource, commonly referred to as a share.
A section name, which is the share name, must be UTF-8, [1, 64) bytes, and is case-insensitive. \" KSMBD_REQ_MAX_SHARE_NAME
Users that may be allowed to connect to a share are those that are present in \fBksmbdpwd.db\fP(5) user database.
A share may limit which users are allowed to connect to a particular share.
When connected to a share, the user is mapped to a system user and underlying filesystem permissions are enforced.
By default, this mapping is done by name, but it may also be done by mapping all users connected to the share to a single system user and group.
When connecting as a user not in the user database, only guest sessions may work.
.SH PARAMETERS
Share parameters, marked below with \fB(S)\fR, can be given in any section.
When a share parameter is given in a section other than \fBglobal\fR, it is specific to that particular share.
Under the \fBglobal\fR section, a share parameter sets its default value for all shares.
Global parameters, marked below with \fB(G)\fR, can only be given in the \fBglobal\fR section and control functionality that applies to the server.
Changes to global parameters apply only after restarting \fBksmbd.mountd\fR and \fBksmbd\fR.
\" .TP
\" \fBadmin users\fR (S)
\" 
\" Default: \fBadmin users = \fR
.TP
\fBbind interfaces only\fR (G)
Only bind to interfaces given with \fBinterfaces\fR.

Default: \fBbind interfaces only = no\fR
.TP
\fBbrowseable\fR (S)
Share is seen in a net view and in the browse list.

Default: \fBbrowseable = yes\fR
.TP
\fBcomment\fR (S)
Description of the share as seen in a net view and and in the browse list.

Default: \fBcomment = \fR
.TP
\fBcreate mask\fR (S)
Octal bitmask that gets bitwise ANDed with DOS-to-UNIX-mapped permissions when creating a file.

Default: \fBcreate mask = 0744\fR
.TP
\fBcrossmnt\fR (S)
Allow path lookup to cross a mountpoint to the root of a different filesystem.

Default: \fBcrossmnt = yes\fR
.TP
\fBdeadtime\fR (G)
Number of minutes of inactivity before a connection is considered dead and is then terminated.
The connection is not terminated if it has any open files.
With \fBdeadtime = 0\fR, no connection is considered dead due to inactivity.

Default: \fBdeadtime = 0\fR
.TP
\fBdirectory mask\fR (S)
Octal bitmask that gets bitwise ANDed with DOS-to-UNIX-mapped permissions when creating a directory.

Default: \fBdirectory mask = 0755\fR
.TP
\fBdurable handles\fR (G)
Can grant SMB2 durable file handles on a share.

Default: \fBdurable handles = no\fR
\" .TP
\" \fBfollow symlinks\fR (S)
\" 
\" Default: \fBfollow symlinks = no\fR
.TP
\fBforce create mode\fR (S)
Octal bitmask that gets bitwise ORed after the bitmask given with \fBcreate mask\fR is applied.

Default: \fBforce create mode = 0000\fR
.TP
\fBforce directory mode\fR (S)
Octal bitmask that gets bitwise ORed after the bitmask given with \fBdirectory mask\fR is applied.

Default: \fBforce directory mode = 0000\fR
.TP
\fBforce group\fR (S)
System group that all users connected to the share are mapped to.

Default: \fBforce group = \fR
.TP
\fBforce user\fR (S)
System user that all users connected to the share are mapped to.
With \fBforce group = \fR, primary group of the system user is the respective system group.

Default: \fBforce user = \fR
.TP
\fBguest account\fR (G)
User that does not require a password when connecting to any share with \fBguest ok = yes\fR.
When connecting to such a share with the user left empty, the parameter determines what system user to map to.

Default: \fBguest account = nobody\fR
.TP
\fBguest account\fR (S)
User that does not require a password when connecting to the share with \fBguest ok = yes\fR given.

Default: \fBguest account = \fR
.TP
\fBguest ok\fR (S)
Allow passwordless connections to the share as the user given with \fBguest account\fR and with the user left empty.

Default: \fBguest ok = no\fR
.TP
\fBhide dot files\fR (S)
Files starting with a dot appear as hidden files.

Default: \fBhide dot files = yes\fR
\" .TP
\" \fBhosts allow\fR (S)
\" 
\" Default: \fBhosts allow = \fR
\" .TP
\" \fBhosts deny\fR (S)
\" 
\" Default: \fBhosts deny = \fR
.TP
\fBinherit owner\fR (S)
Ownership for new files and directories is controlled by the ownership of the parent directory.

Default: \fBinherit owner = no\fR
.TP
\fBinterfaces\fR (G)
List of the interfaces that are listened to with \fBbind interfaces only = yes\fR given.

Default: \fBinterfaces = \fR
.TP
\fBinvalid users\fR (S)
List of the users that are disallowed to connect to the share.
A user being in the list has precedence over it being in \fBvalid users\fR.
With \fBinvalid users = \fR, no user is disallowed.

Default: \fBinvalid users = \fR
.TP
\fBipc timeout\fR (G)
Number of seconds user space has time to reply to a heartbeat frame.
If exceeded, all sessions and TCP connections will be closed.
With \fBipc timeout = 0\fR, user space can reply whenever.

Default: \fBipc timeout = 0\fR
.TP
\fBkerberos keytab file (G)
Path of the keytab file for the service principal.
If no value is given, it is the default keytab resolved with \fBkrb5_kt_default\fP(3).

Default: \fBkerberos keytab file = 
.TP
\fBkerberos service name (G)
Service principal name.
If no value is given, it is \fBcifs/\fR followed by the FQDN resolved with \fBgetaddrinfo\fP(3).

Default: \fBkerberos service name = 
.TP
\fBmap to guest\fR (G)
When to map a user to the user given with \fBguest account\fR.
With \fBmap to guest = bad user\fR, map when the user does not exist.
\" With \fBmap to guest = bad password\fR, 
\" With \fBmap to guest = bad uid\fR, 

Default: \fBmap to guest = never\fR
.TP
\fBmax active sessions\fR (G)
Maximum number of simultaneous sessions to all shares.

Default: \fBmax active sessions = 1024\fR \" KSMBD_CONF_DEFAULT_SESS_CAP
.TP
\fBmax connections\fR (G)
Maximum number of simultaneous connections to the server.
With \fBmax connections = 0\fR, the value will be set to the maximum allowed number of 65536. \" KSMBD_CONF_MAX_CONNECTIONS
Number suffixes are allowed.

Default: \fBmax connections = 128\fR
.TP
\fBmax connections\fR (S)
Maximum number of simultaneous connections to the share.
With \fBmax connections = 0\fR, the value will be set to the maximum allowed number of 65536. \" KSMBD_CONF_MAX_CONNECTIONS
Number suffixes are allowed.

Default: \fBmax connections = 128\fR
.TP
\fBmax open files\fR (G)
Maximum number of simultaneous open files for a client.

Default: \fBmax open files = 10000\fR
.TP
\fBnetbios name\fR (G)
NetBIOS name.

Default: \fBnetbios name = KSMBD SERVER\fR
.TP
\fBoplocks\fR (S)
Issue oplocks to file open requests on the share.

Default: \fBoplocks = yes\fR
.TP
\fBpath\fR (S)
Path of the directory users connected to the share are given access to.

Default: \fBpath = \fR
.TP
\fBread list\fR (S)
List of the users that are allowed read-only access to the share.
A user being in the list has precedence over \fBread only = no\fR or it being in \fBwrite list\fR.

Default: \fBread list = \fR
.TP
\fBread only\fR (S)
Users are allowed read-only access to the share.
With \fBread only = no\fR, the effect is the same as with \fBwriteable = yes\fR.

Default: \fBread only = ; yes\fR
.TP
\fBrestrict anonymous\fR (G)
How to restrict connections to any share as the user given with \fBguest account\fR.
With \fBrestrict anonymous = 1\fR or \fBrestrict anonymous = 2\fR, disallow connections to the \fBIPC$\fR share and any share that gives \fBguest ok = no\fR.

Default: \fBrestrict anonymous = 0\fR
.TP
\fBroot directory\fR (G)
Path of the directory prepended to \fBpath\fR of every share.
Somewhat similar to \fBchroot\fP(2).

Default: \fBroot directory = \fR
.TP
\fBserver max protocol\fR (G)
Maximum protocol version supported.

Default: \fBserver max protocol = SMB3_11\fR
.TP
\fBserver min protocol\fR (G)
Minimum protocol version supported.

Default: \fBserver min protocol = SMB2_10\fR
.TP
\fBserver multi channel support\fR (G)
Use of SMB3 multi-channel is supported.
SMB3 multi-channel support is experimental and may corrupt data under race conditions.

Default: \fBserver multi channel support = no\fR
.TP
\fBserver signing\fR (G)
Client is allowed or required to use SMB2 signing.
With \fBserver signing = disabled\fR or \fBserver signing = auto\fR, SMB2 signing is allowed if it is requested by the client.
With \fBserver signing = mandatory\fR, SMB2 signing is required.

Default: \fBserver signing = disabled\fR
.TP
\fBserver string\fR (G)
String that will appear in browse lists next to the machine name.

Default: \fBserver string = SMB SERVER\fR
.TP
\fBshare:fake_fscaps\fR (G)
Decimal bitmask that gets bitwise ORed with the filesystem capability flags so as to fake them.
With \fBshare:fake_fscaps = 64\fR, the FILE_SUPPORTS_SPARSE_FILES flag is set.

Default: \fBshare:fake_fscaps = 64\fR \" FILE_SUPPORTS_SPARSE_FILES
.TP
\fBsmb2 leases\fR (G)
Negotiate SMB2 leases on file open requests.

Default: \fBsmb2 leases = no\fR
.TP
\fBsmb2 max credits\fR (G)
Maximum number of outstanding simultaneous SMB2 operations.
Number suffixes are allowed.

Default: \fBsmb2 max credits = 8192\fR \" SMB2_MAX_CREDITS
.TP
\fBsmb2 max read\fR (G)
Maximum length that may be used in a SMB2 READ request sent by a client.
Number suffixes are allowed.

Default: \fBsmb2 max read = 4MB\fR \" SMB3_DEFAULT_IOSIZE
.TP
\fBsmb2 max trans\fR (G)
Maximum buffer size that may be used by a client in a sent SET_INFO request or a received QUERY_INFO, QUERY_DIRECTORY, or CHANGE_NOTIFY response.
Number suffixes are allowed.

Default: \fBsmb2 max trans = 1MB\fR \" SMB3_DEFAULT_TRANS_SIZE
.TP
\fBsmb2 max write\fR (G)
Maximum length that may be used in a SMB2 WRITE request sent by a client.
Number suffixes are allowed.

Default: \fBsmb2 max write = 4MB\fR \" SMB3_DEFAULT_IOSIZE
.TP
\fBsmb3 encryption\fR (G)
Client is disallowed, allowed, or required to use SMB3 encryption.
With \fBsmb3 encryption = disabled\fR, SMB3 encryption is disallowed even if it is requested by the client.
With \fBsmb3 encryption = auto\fR, SMB3 encryption is allowed if it is requested by the client.
With \fBsmb3 encryption = mandatory\fR, SMB3 encryption is required, i.e. clients that do not support encryption will be denied access to all shares.

Default: \fBsmb3 encryption = auto\fR
.TP
\fBsmbd max io size\fR (G)
Maximum read/write size of SMB-Direct.
Number suffixes are allowed.

Default: \fBsmbd max io size = 8MB\fR \" SMBD_DEFAULT_IOSIZE
.TP
\fBstore dos attributes\fR (S)
Store DOS attributes using xattr and then use them in the DOS-to-UNIX-mapping of permissions.

Default: \fBstore dos attributes = yes\fR
.TP
\fBtcp port\fR (G)
TCP port that is listened to.

Default: \fBtcp port = 445\fR
.TP
\fBvalid users\fR (S)
List of the users that are allowed to connect to the share.
With \fBvalid users = \fR, all users are allowed.

Default: \fBvalid users = \fR
.TP
\fBveto files\fR (S)
Names of files and directories that are made invisible and inaccessible.
Names are given between forward slashes (\fB/\fR), e.g. \fBveto files = /foo/bar/\fR to make files and directories named \fBfoo\fR and \fBbar\fR invisible and inaccessible.
An asterisk (\fB*\fR) and a question mark (\fB?\fR) are used for matching any number of characters and a character, respectively.

Default: \fBveto files = \fR
.TP
\fBvfs objects\fR (S)
List of the VFS modules to overload I/O operations with.
Available VFS modules are \fBacl_xattr\fR and \fBstreams_xattr\fR.

Default: \fBvfs objects = \fR
.TP
\fBworkgroup\fR (G)
Workgroup the server will appear to be in when queried by clients.

Default: \fBworkgroup = WORKGROUP\fR
.TP
\fBwritable\fR (S)
Users are allowed read-write access to the share.
With \fBwritable = yes\fR, the effect is the same as with \fBread only = no\fR.

Default: \fBwritable = \fR
.TP
\fBwriteable\fR (S)
Synonym for \fBwritable\fP.
.TP
\fBwrite list\fR (S)
List of the users that are allowed read-write access to the share.
A user being in the list has precedence over \fBread only = yes\fR.

Default: \fBwrite list = \fR
.TP
\fBwrite ok\fR (S)
Synonym for \fBwritable\fP.
.SH COPYRIGHT
Copyright \(co 2015-2022 ksmbd-tools contributors.
License GPLv2: GNU GPL version 2 <https://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html>.
.br
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
.SH "REPORTING BUGS"
For bug reports, use the issue tracker at https://github.com/cifsd-team/ksmbd-tools/issues.
.SH "SEE ALSO"
.TP
\fBUtilities\fR
\fBksmbd.addshare\fP(8),
\fBksmbd.adduser\fP(8),
\fBksmbd.mountd\fP(8)