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cifs.upcall: bump SPNEGO msg version number and don't reject old versions

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When we added the ability for the kernel to send sec=mskrb5 to the
upcall, we subtly broke old cifs.upcall versions that don't understand
it. Bump the spnego message version to 2 to make this clear. Also,
change cifs.upcall to not reject requests with a version that's lower
than the current one, and to send the reply with the same version that
the request sent. The idea is to try and keep cifs.upcall backward
compatible with old kernels.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
(This used to be commit b868463015dedc684eb13d12118a98ccca71250a)
This commit is contained in:
Jeff Layton 2008-08-22 13:29:16 -04:00
parent 2f02c33982
commit 2ed60a4f6a
2 changed files with 3 additions and 3 deletions
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4
source3/client/cifs.upcall.c
View File

@ -284,7 +284,7 @@ int main(const int argc, char *const argv[])
}
SAFE_FREE(buf);
if (kernel_upcall_version != CIFS_SPNEGO_UPCALL_VERSION) {
if (kernel_upcall_version > CIFS_SPNEGO_UPCALL_VERSION) {
syslog(LOG_WARNING,
"incompatible kernel upcall version: 0x%x",
kernel_upcall_version);
@ -353,7 +353,7 @@ int main(const int argc, char *const argv[])
rc = 1;
goto out;
}
keydata->version = CIFS_SPNEGO_UPCALL_VERSION;
keydata->version = kernel_upcall_version;
keydata->flags = 0;
keydata->sesskey_len = sess_key.length;
keydata->secblob_len = secblob.length;

2
source3/client/cifs_spnego.h
View File

@ -23,7 +23,7 @@
#ifndef _CIFS_SPNEGO_H
#define _CIFS_SPNEGO_H
#define CIFS_SPNEGO_UPCALL_VERSION 1
#define CIFS_SPNEGO_UPCALL_VERSION 2
/*
* The version field should always be set to CIFS_SPNEGO_UPCALL_VERSION.