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NFSD add nfs4 inter ssc to nfsd4_copy

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Given a universal address, mount the source server from the destination
server.  Use an internal mount. Call the NFS client nfs42_ssc_open to
obtain the NFS struct file suitable for nfsd_copy_range.

Ability to do "inter" server-to-server depends on the an nfsd kernel
parameter "inter_copy_offload_enable".

Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
This commit is contained in:
Olga Kornievskaia
2019-10-09 11:50:48 -04:00
committed by J. Bruce Fields
parent b9e8638e3d
commit ce0887ac96
5 changed files with 296 additions and 28 deletions
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15
fs/nfsd/nfs4state.c
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@@ -5681,8 +5681,9 @@ _free_cpntf_state_locked(struct nfsd_net *nn, struct nfs4_cpntf_state *cps)
* copy stateid. Look up the copy notify stateid from the
* idr structure and take a reference on it.
*/
static __be32 _find_cpntf_state(struct nfsd_net *nn, stateid_t *st,
struct nfs4_cpntf_state **cps)
__be32 manage_cpntf_state(struct nfsd_net *nn, stateid_t *st,
struct nfs4_client *clp,
struct nfs4_cpntf_state **cps)
{
copy_stateid_t *cps_t;
struct nfs4_cpntf_state *state = NULL;
@@ -5696,12 +5697,16 @@ static __be32 _find_cpntf_state(struct nfsd_net *nn, stateid_t *st,
cp_stateid);
if (state->cp_stateid.sc_type != NFS4_COPYNOTIFY_STID)
return nfserr_bad_stateid;
refcount_inc(&state->cp_stateid.sc_count);
if (!clp)
refcount_inc(&state->cp_stateid.sc_count);
else
_free_cpntf_state_locked(nn, state);
}
spin_unlock(&nn->s2s_cp_lock);
if (!state)
return nfserr_bad_stateid;
*cps = state;
if (!clp && state)
*cps = state;
return 0;
}
@@ -5712,7 +5717,7 @@ static __be32 find_cpntf_state(struct nfsd_net *nn, stateid_t *st,
struct nfs4_cpntf_state *cps = NULL;
struct nfsd4_compound_state cstate;
status = _find_cpntf_state(nn, st, &cps);
status = manage_cpntf_state(nn, st, NULL, &cps);
if (status)
return status;