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nfsd4: probe callback channel only once 

Our callback code doesn't actually handle concurrent attempts to probe
the callback channel.  Some rethinking of the locking may be required.
However, we can also just move the callback probing to this case.  Since
this is the only time a client is "confirmed" (and since that can only
happen once in the lifetime of a client), this ensures we only probe
once.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
This commit is contained in:
J. Bruce Fields 2007-11-22 13:54:18 -05:00
parent 24e1c13c93
commit 46f8a64bae
2 changed files with 2 additions and 4 deletions
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3
fs/nfsd/nfs4callback.c
View File

@ -395,8 +395,7 @@ nfsd4_probe_callback(struct nfs4_client *clp)
};
struct task_struct *t;
if (atomic_read(&cb->cb_set))
return;
BUG_ON(atomic_read(&clp->cl_callback.cb_set));
/* Initialize address */
memset(&addr, 0, sizeof(addr));

3
fs/nfsd/nfs4state.c
View File

@ -948,6 +948,7 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
}
move_to_confirmed(unconf);
conf = unconf;
nfsd4_probe_callback(conf);
status = nfs_ok;
}
} else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm)))
@ -965,8 +966,6 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
status = nfserr_clid_inuse;
}
out:
if (!status)
nfsd4_probe_callback(conf);
nfs4_unlock_state();
return status;
}