netfs: Remove global reference count lock.

* libnetfs/drop-node.c: Remove use of netfs_node_refcnt_lock.
* libnetfs/init-init.c: Remove netfs_node_refcnt_lock.
* libnetfs/make-node.c: Initialize refcounts in refcounts_init.
* libnetfs/netfs.h: Use refcounts_t for tracking node references. Remove
netfs_node_refcnt_lock. Add netfs_nref_light, netfs_nrele_light and
handler netfs_try_dropping_softrefs. Adjust comments.
* libnetfs/nput.c: Use refcounts_t. Call netfs_try_dropping_softrefs to
remove any soft reference that the translator might have acquired
during the lifetime of the node. Implement empty
netfs_try_dropping_softrefs.
* libnetfs/nref.c: Implement netfs_nref_light.
* libnetfs/nrele.c: Use refcounts_t and netfs_try_dropping_softrefs.
Implement netfs_nrele_light.
* ftpfs/dir.c: Use netfs_nref without locking the old
netfs_node_refcnt_lock.
* ftpfs/node.c: Likewise.
* usermux/mux.c: Use netfs_nref to increase hard references of the node.
* hostmux/mux.c: Use netfs_nref to increase hard references of the node.
* trans/fakeroot.c (new_node): Use a light reference when storing a node in the
hash table.
* trans/fakeroot.c (netfs_try_dropping_softrefs): Implement
netfs_try_dropping_softrefs to remove the node from the hash table.
* trans/fakeroot.c (netfs_node_norefs): Remove code to remove the node
from the hash table.
* trans/fakeroot.c (netfs_S_dir_lookup): Simplify lookup code since we
don't need to lock netfs_node_refcnt_lock anymore.
* procfs/netfs.c: Remove use of netfs_node_refcnt_lock.
* nfs/cache.c: Add mutex to handle exclusive access to nodehash. This
replaces the use of netfs_node_refcnt_lock.
* nfs/cache.c (lookup_handle): Use nodehash_ihash_lock when accessing
nodehash. Use netfs_nref_light to add one soft reference to the node
just added to nodehash.
* nfs/cache.c (netfs_node_norefs): Use netfs_nref. Don't use
netfs_node_refcnt_lock and don't remove the node from nodehash here.
* nfs/cache.c (netfs_try_dropping_softrefs): Drop the light reference
when the node has no more hard references.
* nfs/cache.c (recache_handle): Use nodehash_ihash_lock instead.
* nfs/ops.c (netds_attempt_unlink): Use refcounts_references.
* console/console.c (netfs_node_norefs): Use a soft reference to store
a node in dir_node, cons_node, disp_node, inp_node.
* console/console.c (netfs_try_dropping_softrefs): When dropping all
soft references remove node pointer from the fields above.

1 files changed, 0 insertions, 4 deletions

diff --git a/procfs/netfs.c b/procfs/netfs.c
index 276c57cc..0b3d31aa 100644
--- a/procfs/netfs.c
+++ b/procfs/netfs.c
@@ -222,12 +222,8 @@ error_t netfs_attempt_lookup (struct iouser *user, struct node *dir,
    free all its associated storage. */
 void netfs_node_norefs (struct node *np)
 {
-  pthread_spin_unlock (&netfs_node_refcnt_lock);
-
   procfs_cleanup (np);
   free (np);
-
-  pthread_spin_lock (&netfs_node_refcnt_lock);
 }
 
 /* The user may define this function (but should define it together