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nfsd: New counter for generating client confirm verifier

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If using clientid_counter, it seems possible that gen_confirm could
generate the same verifier for the same client in some situations.

Add a new counter for client confirm verifier to make sure gen_confirm
generates a different verifier on each call for the same clientid.

Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Reviewed-by: Jeff Layton <jlayton@poochiereds.net>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Kinglong Mee 2015-07-18 07:33:31 +08:00 committed by J. Bruce Fields
parent d50ffded79
commit 19311aa835
2 changed files with 2 additions and 1 deletions
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1
fs/nfsd/netns.h
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@ -110,6 +110,7 @@ struct nfsd_net {
unsigned int max_connections;
u32 clientid_counter;
u32 clverifier_counter;
struct svc_serv *nfsd_serv;
};

2
fs/nfsd/nfs4state.c
View File

@ -1899,7 +1899,7 @@ static void gen_confirm(struct nfs4_client *clp, struct nfsd_net *nn)
* __force to keep sparse happy
*/
verf[0] = (__force __be32)get_seconds();
verf[1] = (__force __be32)nn->clientid_counter;
verf[1] = (__force __be32)nn->clverifier_counter++;
memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data));
}