diff options
| -rw-r--r-- | fs/nfs/callback.h | 3 | ||||
| -rw-r--r-- | fs/nfs/callback_proc.c | 7 | ||||
| -rw-r--r-- | fs/nfs/callback_xdr.c | 35 | ||||
| -rw-r--r-- | fs/nfs/nfs4proc.c | 26 | ||||
| -rw-r--r-- | fs/nfs/nfs4state.c | 29 | ||||
| -rw-r--r-- | include/linux/nfs_fs_sb.h | 2 |
6 files changed, 86 insertions, 16 deletions
diff --git a/fs/nfs/callback.h b/fs/nfs/callback.h index 25e8802..b678e3e 100644 --- a/fs/nfs/callback.h +++ b/fs/nfs/callback.h @@ -138,6 +138,8 @@ extern __be32 nfs4_callback_recallslot(struct cb_recallslotargs *args, void *dummy, struct cb_process_state *cps); +extern void nfs4_check_drain_bc_complete(struct nfs4_session *ses); +extern void nfs4_cb_take_slot(struct nfs_client *clp); #endif /* CONFIG_NFS_V4_1 */ extern __be32 nfs4_callback_getattr(struct cb_getattrargs *args, @@ -145,7 +147,6 @@ extern __be32 nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_process_state *cps); extern __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy, struct cb_process_state *cps); - #ifdef CONFIG_NFS_V4 extern int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt); extern void nfs_callback_down(int minorversion); diff --git a/fs/nfs/callback_proc.c b/fs/nfs/callback_proc.c index b70e46d..c1bead2 100644 --- a/fs/nfs/callback_proc.c +++ b/fs/nfs/callback_proc.c @@ -253,6 +253,12 @@ __be32 nfs4_callback_sequence(struct cb_sequenceargs *args, if (clp == NULL) goto out; + /* state manager is resetting the session */ + if (test_bit(NFS4_SESSION_DRAINING, &clp->cl_session->session_state)) { + status = NFS4ERR_DELAY; + goto out; + } + status = validate_seqid(&clp->cl_session->bc_slot_table, args); if (status) goto out; @@ -273,6 +279,7 @@ __be32 nfs4_callback_sequence(struct cb_sequenceargs *args, res->csr_slotid = args->csa_slotid; res->csr_highestslotid = NFS41_BC_MAX_CALLBACKS - 1; res->csr_target_highestslotid = NFS41_BC_MAX_CALLBACKS - 1; + nfs4_cb_take_slot(clp); cps->clp = clp; /* put in nfs4_callback_compound */ out: diff --git a/fs/nfs/callback_xdr.c b/fs/nfs/callback_xdr.c index dbd0d64..7a2d6c5 100644 --- a/fs/nfs/callback_xdr.c +++ b/fs/nfs/callback_xdr.c @@ -596,6 +596,37 @@ preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op) return htonl(NFS_OK); } +static void nfs4_callback_free_slot(struct nfs4_session *session) +{ + struct nfs4_slot_table *tbl = &session->bc_slot_table; + + spin_lock(&tbl->slot_tbl_lock); + /* + * Let the state manager know callback processing done. + * A single slot, so highest used slotid is either 0 or -1 + */ + tbl->highest_used_slotid--; + nfs4_check_drain_bc_complete(session); + spin_unlock(&tbl->slot_tbl_lock); +} + +static void nfs4_cb_free_slot(struct nfs_client *clp) +{ + if (clp && clp->cl_session) + nfs4_callback_free_slot(clp->cl_session); +} + +/* A single slot, so highest used slotid is either 0 or -1 */ +void nfs4_cb_take_slot(struct nfs_client *clp) +{ + struct nfs4_slot_table *tbl = &clp->cl_session->bc_slot_table; + + spin_lock(&tbl->slot_tbl_lock); + tbl->highest_used_slotid++; + BUG_ON(tbl->highest_used_slotid != 0); + spin_unlock(&tbl->slot_tbl_lock); +} + #else /* CONFIG_NFS_V4_1 */ static __be32 @@ -604,6 +635,9 @@ preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op) return htonl(NFS4ERR_MINOR_VERS_MISMATCH); } +static void nfs4_cb_free_slot(struct nfs_client *clp) +{ +} #endif /* CONFIG_NFS_V4_1 */ static __be32 @@ -724,6 +758,7 @@ static __be32 nfs4_callback_compound(struct svc_rqst *rqstp, void *argp, void *r *hdr_res.status = status; *hdr_res.nops = htonl(nops); + nfs4_cb_free_slot(cps.clp); nfs_put_client(cps.clp); dprintk("%s: done, status = %u\n", __func__, ntohl(status)); return rpc_success; diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index e165c53..18a4d5a 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -356,9 +356,9 @@ nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *free_slot) } /* - * Signal state manager thread if session is drained + * Signal state manager thread if session fore channel is drained */ -static void nfs41_check_drain_session_complete(struct nfs4_session *ses) +static void nfs4_check_drain_fc_complete(struct nfs4_session *ses) { struct rpc_task *task; @@ -372,8 +372,20 @@ static void nfs41_check_drain_session_complete(struct nfs4_session *ses) if (ses->fc_slot_table.highest_used_slotid != -1) return; - dprintk("%s COMPLETE: Session Drained\n", __func__); - complete(&ses->complete); + dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__); + complete(&ses->fc_slot_table.complete); +} + +/* + * Signal state manager thread if session back channel is drained + */ +void nfs4_check_drain_bc_complete(struct nfs4_session *ses) +{ + if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) || + ses->bc_slot_table.highest_used_slotid != -1) + return; + dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__); + complete(&ses->bc_slot_table.complete); } static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) @@ -390,7 +402,7 @@ static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) spin_lock(&tbl->slot_tbl_lock); nfs4_free_slot(tbl, res->sr_slot); - nfs41_check_drain_session_complete(res->sr_session); + nfs4_check_drain_fc_complete(res->sr_session); spin_unlock(&tbl->slot_tbl_lock); res->sr_slot = NULL; } @@ -4777,17 +4789,17 @@ struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp) if (!session) return NULL; - init_completion(&session->complete); - tbl = &session->fc_slot_table; tbl->highest_used_slotid = -1; spin_lock_init(&tbl->slot_tbl_lock); rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table"); + init_completion(&tbl->complete); tbl = &session->bc_slot_table; tbl->highest_used_slotid = -1; spin_lock_init(&tbl->slot_tbl_lock); rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table"); + init_completion(&tbl->complete); session->session_state = 1<<NFS4_SESSION_INITING; diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c index 485e95e..6891ded 100644 --- a/fs/nfs/nfs4state.c +++ b/fs/nfs/nfs4state.c @@ -142,6 +142,11 @@ static int nfs41_setup_state_renewal(struct nfs_client *clp) return status; } +/* + * Back channel returns NFS4ERR_DELAY for new requests when + * NFS4_SESSION_DRAINING is set so there is no work to be done when draining + * is ended. + */ static void nfs4_end_drain_session(struct nfs_client *clp) { struct nfs4_session *ses = clp->cl_session; @@ -165,22 +170,32 @@ static void nfs4_end_drain_session(struct nfs_client *clp) } } -static int nfs4_begin_drain_session(struct nfs_client *clp) +static int nfs4_wait_on_slot_tbl(struct nfs4_slot_table *tbl) { - struct nfs4_session *ses = clp->cl_session; - struct nfs4_slot_table *tbl = &ses->fc_slot_table; - spin_lock(&tbl->slot_tbl_lock); - set_bit(NFS4_SESSION_DRAINING, &ses->session_state); if (tbl->highest_used_slotid != -1) { - INIT_COMPLETION(ses->complete); + INIT_COMPLETION(tbl->complete); spin_unlock(&tbl->slot_tbl_lock); - return wait_for_completion_interruptible(&ses->complete); + return wait_for_completion_interruptible(&tbl->complete); } spin_unlock(&tbl->slot_tbl_lock); return 0; } +static int nfs4_begin_drain_session(struct nfs_client *clp) +{ + struct nfs4_session *ses = clp->cl_session; + int ret = 0; + + set_bit(NFS4_SESSION_DRAINING, &ses->session_state); + /* back channel */ + ret = nfs4_wait_on_slot_tbl(&ses->bc_slot_table); + if (ret) + return ret; + /* fore channel */ + return nfs4_wait_on_slot_tbl(&ses->fc_slot_table); +} + int nfs41_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) { int status; diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h index 1eaa054..e93ada0 100644 --- a/include/linux/nfs_fs_sb.h +++ b/include/linux/nfs_fs_sb.h @@ -197,6 +197,7 @@ struct nfs4_slot_table { * op for dynamic resizing */ int target_max_slots; /* Set by CB_RECALL_SLOT as * the new max_slots */ + struct completion complete; }; static inline int slot_idx(struct nfs4_slot_table *tbl, struct nfs4_slot *sp) @@ -213,7 +214,6 @@ struct nfs4_session { unsigned long session_state; u32 hash_alg; u32 ssv_len; - struct completion complete; /* The fore and back channel */ struct nfs4_channel_attrs fc_attrs; |
