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| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2012-11-26 16:16:54 -0500 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2012-12-06 00:30:47 +0100 |
| commit | c10e449827e6008ef5a4a71c0247c7eb73948e1b (patch) | |
| tree | 7512d993fc182b24655d91ea930706451c0591e6 | |
| parent | 0ca3f4825ac92a10aa8f6534f765c44f22778dd3 (diff) | |
| download | linux-c10e449827e6008ef5a4a71c0247c7eb73948e1b.tar.gz linux-c10e449827e6008ef5a4a71c0247c7eb73948e1b.tar.bz2 linux-c10e449827e6008ef5a4a71c0247c7eb73948e1b.zip | |
NFSv4.1: Ping server when our session table limits are too high
If the server requests a lower target_highest_slotid, then ensure
that we ping it with at least one RPC call containing an
appropriate SEQUENCE op. This ensures that the server won't need to
send a recall callback in order to shrink the slot table.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| -rw-r--r-- | fs/nfs/nfs4_fs.h | 1 | ||||
| -rw-r--r-- | fs/nfs/nfs4proc.c | 20 | ||||
| -rw-r--r-- | fs/nfs/nfs4state.c | 5 |
3 files changed, 23 insertions, 3 deletions
diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h index 322bd0168ebf..8fe155ba16d1 100644 --- a/fs/nfs/nfs4_fs.h +++ b/fs/nfs/nfs4_fs.h @@ -321,6 +321,7 @@ int nfs41_discover_server_trunking(struct nfs_client *clp, struct nfs_client **, struct rpc_cred *); extern void nfs4_schedule_session_recovery(struct nfs4_session *, int); extern void nfs41_server_notify_target_slotid_update(struct nfs_client *clp); +extern void nfs41_server_notify_highest_slotid_update(struct nfs_client *clp); #else static inline void nfs4_schedule_session_recovery(struct nfs4_session *session, int err) diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index a0c35ab12a6b..ecd4ed3a4f65 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -389,6 +389,7 @@ static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) { struct nfs4_session *session; struct nfs4_slot_table *tbl; + bool send_new_highest_used_slotid = false; if (!res->sr_slot) { /* just wake up the next guy waiting since @@ -400,12 +401,25 @@ static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) session = tbl->session; spin_lock(&tbl->slot_tbl_lock); + /* Be nice to the server: try to ensure that the last transmitted + * value for highest_user_slotid <= target_highest_slotid + */ + if (tbl->highest_used_slotid > tbl->target_highest_slotid) + send_new_highest_used_slotid = true; + nfs4_free_slot(tbl, res->sr_slot); - if (!nfs4_session_draining(session)) - rpc_wake_up_first(&tbl->slot_tbl_waitq, - nfs4_set_task_privileged, NULL); + + if (tbl->highest_used_slotid != NFS4_NO_SLOT) + send_new_highest_used_slotid = false; + if (!nfs4_session_draining(session)) { + if (rpc_wake_up_first(&tbl->slot_tbl_waitq, + nfs4_set_task_privileged, NULL) != NULL) + send_new_highest_used_slotid = false; + } spin_unlock(&tbl->slot_tbl_lock); res->sr_slot = NULL; + if (send_new_highest_used_slotid) + nfs41_server_notify_highest_slotid_update(session->clp); } static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c index 1402283d152d..c137421f2123 100644 --- a/fs/nfs/nfs4state.c +++ b/fs/nfs/nfs4state.c @@ -1961,6 +1961,11 @@ void nfs41_server_notify_target_slotid_update(struct nfs_client *clp) nfs41_ping_server(clp); } +void nfs41_server_notify_highest_slotid_update(struct nfs_client *clp) +{ + nfs41_ping_server(clp); +} + static void nfs4_reset_all_state(struct nfs_client *clp) { if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { |