diff options
| author | Andy Adamson <andros@netapp.com> | 2010-01-20 22:06:27 +0100 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2010-02-10 14:30:59 +0100 |
| commit | b9efa1b27e25b1286504973c0a6bf0f24106faa8 (patch) | |
| tree | e2cff0c8c7a33869123ea3e340d3b9ac3eefcef2 /fs/nfs/nfs4state.c | |
| parent | nfs41: back channel drc minimal implementation (diff) | |
| download | linux-b9efa1b27e25b1286504973c0a6bf0f24106faa8.tar.xz linux-b9efa1b27e25b1286504973c0a6bf0f24106faa8.zip | |
nfs41: implement cb_recall_slot
Drain the fore channel and reset the max_slots to the new value.
Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/nfs4state.c')
| -rw-r--r-- | fs/nfs/nfs4state.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c index 8406cacd3240..9164758c1ace 100644 --- a/fs/nfs/nfs4state.c +++ b/fs/nfs/nfs4state.c @@ -1249,6 +1249,12 @@ static int nfs4_reclaim_lease(struct nfs_client *clp) } #ifdef CONFIG_NFS_V4_1 +void nfs41_handle_recall_slot(struct nfs_client *clp) +{ + set_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state); + nfs4_schedule_state_recovery(clp); +} + void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags) { if (!flags) @@ -1299,9 +1305,38 @@ out: return status; } +static int nfs4_recall_slot(struct nfs_client *clp) +{ + struct nfs4_slot_table *fc_tbl = &clp->cl_session->fc_slot_table; + struct nfs4_channel_attrs *fc_attrs = &clp->cl_session->fc_attrs; + struct nfs4_slot *new, *old; + int i; + + nfs4_begin_drain_session(clp); + new = kmalloc(fc_tbl->target_max_slots * sizeof(struct nfs4_slot), + GFP_KERNEL); + if (!new) + return -ENOMEM; + + spin_lock(&fc_tbl->slot_tbl_lock); + for (i = 0; i < fc_tbl->target_max_slots; i++) + new[i].seq_nr = fc_tbl->slots[i].seq_nr; + old = fc_tbl->slots; + fc_tbl->slots = new; + fc_tbl->max_slots = fc_tbl->target_max_slots; + fc_tbl->target_max_slots = 0; + fc_attrs->max_reqs = fc_tbl->max_slots; + spin_unlock(&fc_tbl->slot_tbl_lock); + + kfree(old); + nfs4_end_drain_session(clp); + return 0; +} + #else /* CONFIG_NFS_V4_1 */ static int nfs4_reset_session(struct nfs_client *clp) { return 0; } static int nfs4_end_drain_session(struct nfs_client *clp) { return 0; } +static int nfs4_recall_slot(struct nfs_client *clp) { return 0; } #endif /* CONFIG_NFS_V4_1 */ /* Set NFS4CLNT_LEASE_EXPIRED for all v4.0 errors and for recoverable errors @@ -1398,6 +1433,15 @@ static void nfs4_state_manager(struct nfs_client *clp) nfs_client_return_marked_delegations(clp); continue; } + /* Recall session slots */ + if (test_and_clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state) + && nfs4_has_session(clp)) { + status = nfs4_recall_slot(clp); + if (status < 0) + goto out_error; + continue; + } + nfs4_clear_state_manager_bit(clp); /* Did we race with an attempt to give us more work? */ |