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[CIFS] enable parsing for transport encryption mount parm 

Samba now supports transport encryption on particular exports
(mounted tree ids can be encrypted for servers which support the
unix extensions).  This adds parsing support to cifs mount
option parsing for this.

Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Steve French 2008-05-15 16:44:38 +00:00
parent c2cf07d591
commit 95b1cb90b7
3 changed files with 23 additions and 8 deletions
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5
fs/cifs/README
View File

@ -483,6 +483,11 @@ A partial list of the supported mount options follows:
sign Must use packet signing (helps avoid unwanted data modification
by intermediate systems in the route). Note that signing
does not work with lanman or plaintext authentication.
seal Must seal (encrypt) all data on this mounted share before
sending on the network. Requires support for Unix Extensions.
Note that this differs from the sign mount option in that it
causes encryption of data sent over this mounted share but other
shares mounted to the same server are unaffected.
sec Security mode. Allowed values are:
none attempt to connection as a null user (no name)
krb5 Use Kerberos version 5 authentication

1
fs/cifs/cifsglob.h
View File

@ -281,6 +281,7 @@ struct cifsTconInfo {
bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
bool retry:1;
bool nocase:1;
bool seal:1; /* transport encryption for this mounted share */
bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
for this mount even if server would support */
/* BB add field for back pointer to sb struct(s)? */

17
fs/cifs/connect.c
View File

@ -87,8 +87,9 @@ struct smb_vol {
bool no_linux_ext:1;
bool sfu_emul:1;
bool nullauth:1; /* attempt to authenticate with null user */
unsigned nocase; /* request case insensitive filenames */
unsigned nobrl; /* disable sending byte range locks to srv */
bool nocase:1; /* request case insensitive filenames */
bool nobrl:1; /* disable sending byte range locks to srv */
bool seal:1; /* request transport encryption on share */
unsigned int rsize;
unsigned int wsize;
unsigned int sockopt;
@ -1273,8 +1274,12 @@ cifs_parse_mount_options(char *options, const char *devname,
vol->no_psx_acl = 1;
} else if (strnicmp(data, "sign", 4) == 0) {
vol->secFlg |= CIFSSEC_MUST_SIGN;
/* } else if (strnicmp(data, "seal",4) == 0) {
vol->secFlg |= CIFSSEC_MUST_SEAL; */
} else if (strnicmp(data, "seal", 4) == 0) {
/* we do not do the following in secFlags because seal
is a per tree connection (mount) not a per socket
or per-smb connection option in the protocol */
/* vol->secFlg |= CIFSSEC_MUST_SEAL; */
vol->seal = 1;
} else if (strnicmp(data, "direct", 6) == 0) {
vol->direct_io = 1;
} else if (strnicmp(data, "forcedirectio", 13) == 0) {
@ -2126,6 +2131,9 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
for the retry flag is used */
tcon->retry = volume_info.retry;
tcon->nocase = volume_info.nocase;
if (tcon->seal != volume_info.seal)
cERROR(1, ("transport encryption setting "
"conflicts with existing tid"));
} else {
tcon = tconInfoAlloc();
if (tcon == NULL)
@ -2159,6 +2167,7 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
atomic_inc(&pSesInfo->inUse);
tcon->retry = volume_info.retry;
tcon->nocase = volume_info.nocase;
tcon->seal = volume_info.seal;
}
}
}