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author | Weston Andros Adamson <dros@netapp.com> | 2011-05-31 19:05:47 -0400 |
---|---|---|
committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2011-07-12 13:40:27 -0400 |
commit | 78fe0f41d9937ee62817912ac8d627e06243c269 (patch) | |
tree | 7ae4ac3f9675ecbddb5ec0c4615313ae899c10da /fs | |
parent | 7e574f0d3911c5cc60d4d2b57fee975c462d6cd0 (diff) | |
download | op-kernel-dev-78fe0f41d9937ee62817912ac8d627e06243c269.zip op-kernel-dev-78fe0f41d9937ee62817912ac8d627e06243c269.tar.gz |
NFS: use scope from exchange_id to skip reclaim
can be skipped if the "eir_server_scope" from the exchange_id proc differs from
previous calls.
Also, in the future server_scope will be useful for determining whether client
trunking is available
Signed-off-by: Weston Andros Adamson <dros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs')
-rw-r--r-- | fs/nfs/client.c | 1 | ||||
-rw-r--r-- | fs/nfs/nfs4_fs.h | 3 | ||||
-rw-r--r-- | fs/nfs/nfs4proc.c | 32 | ||||
-rw-r--r-- | fs/nfs/nfs4state.c | 9 | ||||
-rw-r--r-- | fs/nfs/nfs4xdr.c | 8 |
5 files changed, 51 insertions, 2 deletions
diff --git a/fs/nfs/client.c b/fs/nfs/client.c index b3dc2b8..006f8ff 100644 --- a/fs/nfs/client.c +++ b/fs/nfs/client.c @@ -293,6 +293,7 @@ static void nfs_free_client(struct nfs_client *clp) nfs4_deviceid_purge_client(clp); kfree(clp->cl_hostname); + kfree(clp->server_scope); kfree(clp); dprintk("<-- nfs_free_client()\n"); diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h index c4a6983..b47f0d4 100644 --- a/fs/nfs/nfs4_fs.h +++ b/fs/nfs/nfs4_fs.h @@ -48,6 +48,7 @@ enum nfs4_client_state { NFS4CLNT_SESSION_RESET, NFS4CLNT_RECALL_SLOT, NFS4CLNT_LEASE_CONFIRM, + NFS4CLNT_SERVER_SCOPE_MISMATCH, }; enum nfs4_session_state { @@ -349,6 +350,8 @@ extern void nfs4_schedule_state_manager(struct nfs_client *); extern void nfs4_schedule_stateid_recovery(const struct nfs_server *, struct nfs4_state *); extern void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags); extern void nfs41_handle_recall_slot(struct nfs_client *clp); +extern void nfs41_handle_server_scope(struct nfs_client *, + struct server_scope **); extern void nfs4_put_lock_state(struct nfs4_lock_state *lsp); extern int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl); extern void nfs4_copy_stateid(nfs4_stateid *, struct nfs4_state *, fl_owner_t, pid_t); diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 5879b23..5f4912f 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -4781,6 +4781,16 @@ out_inval: return -NFS4ERR_INVAL; } +static bool +nfs41_same_server_scope(struct server_scope *a, struct server_scope *b) +{ + if (a->server_scope_sz == b->server_scope_sz && + memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0) + return true; + + return false; +} + /* * nfs4_proc_exchange_id() * @@ -4823,9 +4833,31 @@ int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred) init_utsname()->domainname, clp->cl_rpcclient->cl_auth->au_flavor); + res.server_scope = kzalloc(sizeof(struct server_scope), GFP_KERNEL); + if (unlikely(!res.server_scope)) + return -ENOMEM; + status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); if (!status) status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags); + + if (!status) { + if (clp->server_scope && + !nfs41_same_server_scope(clp->server_scope, + res.server_scope)) { + dprintk("%s: server_scope mismatch detected\n", + __func__); + set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state); + kfree(clp->server_scope); + clp->server_scope = NULL; + } + + if (!clp->server_scope) + clp->server_scope = res.server_scope; + else + kfree(res.server_scope); + } + dprintk("<-- %s status= %d\n", __func__, status); return status; } diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c index e97dd21..5d744a5 100644 --- a/fs/nfs/nfs4state.c +++ b/fs/nfs/nfs4state.c @@ -1643,7 +1643,14 @@ static void nfs4_state_manager(struct nfs_client *clp) goto out_error; } clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); - set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); + + if (test_and_clear_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, + &clp->cl_state)) + nfs4_state_start_reclaim_nograce(clp); + else + set_bit(NFS4CLNT_RECLAIM_REBOOT, + &clp->cl_state); + pnfs_destroy_all_layouts(clp); } diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c index e6e8f3b..1555c74 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c @@ -4977,11 +4977,17 @@ static int decode_exchange_id(struct xdr_stream *xdr, if (unlikely(status)) return status; - /* Throw away server_scope */ + /* Save server_scope */ status = decode_opaque_inline(xdr, &dummy, &dummy_str); if (unlikely(status)) return status; + if (unlikely(dummy > NFS4_OPAQUE_LIMIT)) + return -EIO; + + memcpy(res->server_scope->server_scope, dummy_str, dummy); + res->server_scope->server_scope_sz = dummy; + /* Throw away Implementation id array */ status = decode_opaque_inline(xdr, &dummy, &dummy_str); if (unlikely(status)) |