NFSv4: Remove nfs_client->cl_sem
Now that we're using the flags to indicate state that needs to be
recovered, as well as having implemented proper refcounting and spinlocking
on the state and open_owners, we can get rid of nfs_client->cl_sem. The
only remaining case that was dubious was the file locking, and that case is
now covered by the nfsi->rwsem.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index aec4e47..26dcd77 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -207,12 +207,8 @@
might_sleep();
- rwsem_acquire(&clp->cl_sem.dep_map, 0, 0, _RET_IP_);
-
res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
nfs4_wait_bit_killable, TASK_KILLABLE);
-
- rwsem_release(&clp->cl_sem.dep_map, 1, _RET_IP_);
return res;
}
@@ -1135,7 +1131,6 @@
struct nfs4_state_owner *sp;
struct nfs4_state *state = NULL;
struct nfs_server *server = NFS_SERVER(dir);
- struct nfs_client *clp = server->nfs_client;
struct nfs4_opendata *opendata;
int status;
@@ -1150,11 +1145,10 @@
goto err_put_state_owner;
if (path->dentry->d_inode != NULL)
nfs4_return_incompatible_delegation(path->dentry->d_inode, flags & (FMODE_READ|FMODE_WRITE));
- down_read(&clp->cl_sem);
status = -ENOMEM;
opendata = nfs4_opendata_alloc(path, sp, flags, sattr);
if (opendata == NULL)
- goto err_release_rwsem;
+ goto err_put_state_owner;
if (path->dentry->d_inode != NULL)
opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
@@ -1172,13 +1166,10 @@
goto err_opendata_put;
nfs4_opendata_put(opendata);
nfs4_put_state_owner(sp);
- up_read(&clp->cl_sem);
*res = state;
return 0;
err_opendata_put:
nfs4_opendata_put(opendata);
-err_release_rwsem:
- up_read(&clp->cl_sem);
err_put_state_owner:
nfs4_put_state_owner(sp);
out_err:
@@ -3099,7 +3090,6 @@
struct nfs4_lock_state *lsp;
int status;
- down_read(&clp->cl_sem);
arg.lock_owner.clientid = clp->cl_clientid;
status = nfs4_set_lock_state(state, request);
if (status != 0)
@@ -3116,7 +3106,6 @@
}
request->fl_ops->fl_release_private(request);
out:
- up_read(&clp->cl_sem);
return status;
}
@@ -3273,7 +3262,6 @@
static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
{
- struct nfs_client *clp = state->owner->so_client;
struct nfs_inode *nfsi = NFS_I(state->inode);
struct nfs_seqid *seqid;
struct nfs4_lock_state *lsp;
@@ -3284,15 +3272,12 @@
status = nfs4_set_lock_state(state, request);
/* Unlock _before_ we do the RPC call */
request->fl_flags |= FL_EXISTS;
- down_read(&clp->cl_sem);
down_read(&nfsi->rwsem);
if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
up_read(&nfsi->rwsem);
- up_read(&clp->cl_sem);
goto out;
}
up_read(&nfsi->rwsem);
- up_read(&clp->cl_sem);
if (status != 0)
goto out;
/* Is this a delegated lock? */
@@ -3518,7 +3503,6 @@
static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
{
- struct nfs_client *clp = state->owner->so_client;
struct nfs_inode *nfsi = NFS_I(state->inode);
unsigned char fl_flags = request->fl_flags;
int status;
@@ -3531,7 +3515,6 @@
status = do_vfs_lock(request->fl_file, request);
if (status < 0)
goto out;
- down_read(&clp->cl_sem);
down_read(&nfsi->rwsem);
if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
/* Yes: cache locks! */
@@ -3549,7 +3532,6 @@
printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
out_unlock:
up_read(&nfsi->rwsem);
- up_read(&clp->cl_sem);
out:
request->fl_flags = fl_flags;
return status;