diff options
Diffstat (limited to 'nfs')
| -rw-r--r-- | nfs/ChangeLog | 6 | ||||
| -rw-r--r-- | nfs/rpc.c | 35 |
2 files changed, 19 insertions, 22 deletions
diff --git a/nfs/ChangeLog b/nfs/ChangeLog index 945a1d61..fb95b7cc 100644 --- a/nfs/ChangeLog +++ b/nfs/ChangeLog @@ -1,3 +1,9 @@ +Mon Nov 4 21:23:58 1996 Thomas Bushnell, n/BSG <thomas@gnu.ai.mit.edu> + + * rpc.c (rpc_list_lock): Delete variable. Omit all mention of it + throughout this file. Expand the use of outstanding_lock to cover + what rpc_list_lock used to handle. + Fri Nov 1 18:12:21 1996 Miles Bader <miles@gnu.ai.mit.edu> * rpc.c (conduct_rpc): Unlock OUTSTANDING_LOCK if write fails. @@ -46,16 +46,11 @@ struct rpc_list /* A list of all the pending RPCs. */ static struct rpc_list *outstanding_rpcs; -/* This lock must be held around any modifications to the list - structure of outstanding_rpcs. */ -static spin_lock_t rpc_list_lock = SPIN_LOCK_INITIALIZER; - /* Wake up this condition when an outstanding RPC has received a reply or we should check for timeouts. */ static struct condition rpc_wakeup = CONDITION_INITIALIZER; -/* This lock must be held around modifications of the REPLY members of - records on outstanding_rpcs and around uses of rpc_wakeup. */ +/* Lock the global data and the REPLY fields of outstanding RPC's. */ static struct mutex outstanding_lock = MUTEX_INITIALIZER; @@ -135,15 +130,14 @@ initialize_rpc (int program, int version, int rpc_proc, return p; } -/* Remove HDR from the list of pending RPC's. */ +/* Remove HDR from the list of pending RPC's. rpc_list_lock must be + held */ static void unlink_rpc (struct rpc_list *hdr) { - spin_lock (&rpc_list_lock); *hdr->prevp = hdr->next; if (hdr->next) hdr->next->prevp = hdr->prevp; - spin_unlock (&rpc_list_lock); } /* Send the specified RPC message. *RPCBUF is the initialized buffer @@ -166,14 +160,14 @@ conduct_rpc (void **rpcbuf, int **pp) int n; int cancel; + mutex_lock (&outstanding_lock); + /* Link it in */ - spin_lock (&rpc_list_lock); hdr->next = outstanding_rpcs; if (hdr->next) hdr->next->prevp = &hdr->next; hdr->prevp = &outstanding_rpcs; outstanding_rpcs = hdr; - spin_unlock (&rpc_list_lock); xid = * (int *) (*rpcbuf + sizeof (struct rpc_list)); @@ -183,19 +177,19 @@ conduct_rpc (void **rpcbuf, int **pp) if (mounted_soft && ntransmit == soft_retries) { unlink_rpc (hdr); + mutex_unlock (&outstanding_lock); return ETIMEDOUT; } /* Issue the RPC */ - mutex_lock (&outstanding_lock); lasttrans = mapped_time->seconds; ntransmit++; nc = (void *) *pp - *rpcbuf - sizeof (struct rpc_list); cc = write (main_udp_socket, *rpcbuf + sizeof (struct rpc_list), nc); if (cc == -1) { - mutex_unlock (&outstanding_lock); unlink_rpc (hdr); + mutex_unlock (&outstanding_lock); return errno; } else @@ -207,11 +201,11 @@ conduct_rpc (void **rpcbuf, int **pp) && (mapped_time->seconds - lasttrans < timeout) && !cancel) cancel = hurd_condition_wait (&rpc_wakeup, &outstanding_lock); - mutex_unlock (&outstanding_lock); if (cancel) { unlink_rpc (hdr); + mutex_unlock (&outstanding_lock); return EINTR; } @@ -224,6 +218,8 @@ conduct_rpc (void **rpcbuf, int **pp) } while (!hdr->reply); + mutex_unlock (&outstanding_lock); + /* Switch to the reply buffer. */ *rpcbuf = hdr->reply; free (hdr); @@ -357,7 +353,7 @@ rpc_receive_thread () else { xid = *(int *)buf; - spin_lock (&rpc_list_lock); + mutex_lock (&outstanding_lock); for (r = outstanding_rpcs; r; r = r->next) { if (* (int *) &r[1] == xid) @@ -366,20 +362,15 @@ rpc_receive_thread () *r->prevp = r->next; if (r->next) r->next->prevp = r->prevp; - spin_unlock (&rpc_list_lock); - mutex_lock (&outstanding_lock); r->reply = buf; condition_broadcast (&rpc_wakeup); - mutex_unlock (&outstanding_lock); break; } } if (!r) - { - spin_unlock (&rpc_list_lock); - fprintf (stderr, "NFS dropping reply xid %d\n", xid); - } + fprintf (stderr, "NFS dropping reply xid %d\n", xid); + mutex_unlock (&outstanding_lock); } } while (!r); |