Re: [PATCH 06/11] nfs-utils: mount: AUTH_NONE mounts

[Peter Staubach <staubach@redhat.com>]

Neil Brown wrote:
> On Monday February 26, SteveD@redhat.com wrote:
>   
>> commit 0ffd74c990aca3761b79316d47e1b1778273681c
>> Author: Steve Dickson <steved@redhat.com>
>> Date:   Sat Feb 24 15:27:46 2007 -0500
>>
>>     Added support to specify the AUTH_NONE security flavor (i.e. -o sec=none)
>>     
>
> If you specify "-o sec=none" then data.pseudoflavor will == AUTH_NONE,
> but
>
>   

This support is being added so that the client can mount a file system
which was exported with sec=none.

>>     
>>     Signed-off-by: Steve Dickson <steved@redhat.com>
>>
>> diff --git a/utils/mount/nfsmount.c b/utils/mount/nfsmount.c
>> index d437036..7759260 100644
>> --- a/utils/mount/nfsmount.c
>> +++ b/utils/mount/nfsmount.c
>> @@ -1093,12 +1093,14 @@ nfsmount(const char *spec, const char *node, int *flags,
>>  
>>  		flavor = mountres->auth_flavors.auth_flavors_val;
>>  		while (--i >= 0) {
>> -			if (flavor[i] == data.pseudoflavor)
>> -				yum = 1;
>>  #ifdef NFS_MOUNT_DEBUG
>> -			printf("auth flavor %d: %d\n",
>> -				i, flavor[i]);
>> +			printf("auth flavor[%d] %d\n", i, flavor[i]);
>>  #endif
>> +			if (flavor[i] == data.pseudoflavor ||
>> +				flavor[i] == AUTH_NONE) {
>> +				yum = 1;
>> +				break;
>> +			}
>>     
>
> You are testing if flavor[i] == AUTH_NONE, which doesn't make sense to
> me....

This loop is looking for AUTH_NONE in the list of authentication
flavors that the server supports and was returned through the MOUNT
protocol during mounting.

Basically, if the server file system is exported with AUTH_NONE, then
it doesn't matter what flavor that the client chooses, the server will
always map it to AUTH_NONE and all requests will be processed with the
anonymous uid and gid.

       ps

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