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| 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/callback_proc.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/callback_proc.c')
| -rw-r--r-- | fs/nfs/callback_proc.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/fs/nfs/callback_proc.c b/fs/nfs/callback_proc.c index 4062f7690a33..e5155d9df595 100644 --- a/fs/nfs/callback_proc.c +++ b/fs/nfs/callback_proc.c @@ -361,4 +361,36 @@ out: dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); return status; } + +/* Reduce the fore channel's max_slots to the target value */ +unsigned nfs4_callback_recallslot(struct cb_recallslotargs *args, void *dummy) +{ + struct nfs_client *clp; + struct nfs4_slot_table *fc_tbl; + int status; + + status = htonl(NFS4ERR_OP_NOT_IN_SESSION); + clp = nfs_find_client(args->crsa_addr, 4); + if (clp == NULL) + goto out; + + dprintk("NFS: CB_RECALL_SLOT request from %s target max slots %d\n", + rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR), + args->crsa_target_max_slots); + + fc_tbl = &clp->cl_session->fc_slot_table; + + status = htonl(NFS4ERR_BAD_HIGH_SLOT); + if (args->crsa_target_max_slots >= fc_tbl->max_slots || + args->crsa_target_max_slots < 1) + goto out; + + fc_tbl->target_max_slots = args->crsa_target_max_slots; + nfs41_handle_recall_slot(clp); + status = htonl(NFS4_OK); + nfs_put_client(clp); /* balance nfs_find_client */ +out: + dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); + return status; +} #endif /* CONFIG_NFS_V4_1 */ |