linux-kernel - [PATCH 22/24] afs: Eliminate the address pointer from the address list cursor

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Date:   Sat, 20 Oct 2018 02:13:17 +0100
From:   David Howells <dhowells@...hat.com>
To:     viro@...iv.linux.org.uk
Cc:     dhowells@...hat.com, linux-afs@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 22/24] afs: Eliminate the address pointer from the address
 list cursor

Eliminate the address pointer from the address list cursor as it's
redundant (ac->addrs[ac->index] can be used to find the same address) and
address lists must be replaced rather than being rearranged, so is of
limited value.

Signed-off-by: David Howells <dhowells@...hat.com>
---

 fs/afs/addr_list.c |    2 --
 fs/afs/internal.h  |    1 -
 fs/afs/rxrpc.c     |    2 +-
 fs/afs/server.c    |    2 --
 fs/afs/vl_rotate.c |    2 +-
 fs/afs/volume.c    |    6 +++---
 6 files changed, 5 insertions(+), 10 deletions(-)

diff --git a/fs/afs/addr_list.c b/fs/afs/addr_list.c
index bc5ce31a4ae4..1536d1d21c33 100644
--- a/fs/afs/addr_list.c
+++ b/fs/afs/addr_list.c
@@ -371,7 +371,6 @@ bool afs_iterate_addresses(struct afs_addr_cursor *ac)
 
 	ac->begun = true;
 	ac->responded = false;
-	ac->addr = &ac->alist->addrs[ac->index];
 	return true;
 }
 
@@ -389,7 +388,6 @@ int afs_end_cursor(struct afs_addr_cursor *ac)
 		afs_put_addrlist(alist);
 	}
 
-	ac->addr = NULL;
 	ac->alist = NULL;
 	ac->begun = false;
 	return ac->error;
diff --git a/fs/afs/internal.h b/fs/afs/internal.h
index ac9da1e4050e..e5b596bd8acf 100644
--- a/fs/afs/internal.h
+++ b/fs/afs/internal.h
@@ -653,7 +653,6 @@ struct afs_interface {
  */
 struct afs_addr_cursor {
 	struct afs_addr_list	*alist;		/* Current address list (pins ref) */
-	struct sockaddr_rxrpc	*addr;
 	u32			abort_code;
 	unsigned short		start;		/* Starting point in alist->addrs[] */
 	unsigned short		index;		/* Wrapping offset from start to current addr */
diff --git a/fs/afs/rxrpc.c b/fs/afs/rxrpc.c
index 444ba0d511ef..42e1ea7372e9 100644
--- a/fs/afs/rxrpc.c
+++ b/fs/afs/rxrpc.c
@@ -359,7 +359,7 @@ static int afs_send_pages(struct afs_call *call, struct msghdr *msg)
 long afs_make_call(struct afs_addr_cursor *ac, struct afs_call *call,
 		   gfp_t gfp, bool async)
 {
-	struct sockaddr_rxrpc *srx = ac->addr;
+	struct sockaddr_rxrpc *srx = &ac->alist->addrs[ac->index];
 	struct rxrpc_call *rxcall;
 	struct msghdr msg;
 	struct kvec iov[1];
diff --git a/fs/afs/server.c b/fs/afs/server.c
index aa35cfae5440..7c1be8b4dc9a 100644
--- a/fs/afs/server.c
+++ b/fs/afs/server.c
@@ -367,7 +367,6 @@ static void afs_destroy_server(struct afs_net *net, struct afs_server *server)
 		.alist	= alist,
 		.start	= alist->index,
 		.index	= 0,
-		.addr	= &alist->addrs[alist->index],
 		.error	= 0,
 	};
 	_enter("%p", server);
@@ -518,7 +517,6 @@ static bool afs_do_probe_fileserver(struct afs_fs_cursor *fc)
 
 	_enter("");
 
-	fc->ac.addr = NULL;
 	fc->ac.start = READ_ONCE(fc->ac.alist->index);
 	fc->ac.index = fc->ac.start;
 	fc->ac.error = 0;
diff --git a/fs/afs/vl_rotate.c b/fs/afs/vl_rotate.c
index 5b99ea7be194..ead6dedbb561 100644
--- a/fs/afs/vl_rotate.c
+++ b/fs/afs/vl_rotate.c
@@ -209,7 +209,7 @@ bool afs_select_vlserver(struct afs_vl_cursor *vc)
 	if (!afs_iterate_addresses(&vc->ac))
 		goto next_server;
 
-	_leave(" = t %pISpc", &vc->ac.addr->transport);
+	_leave(" = t %pISpc", &vc->ac.alist->addrs[vc->ac.index].transport);
 	return true;
 
 next_server:
diff --git a/fs/afs/volume.c b/fs/afs/volume.c
index f0020e35bf6f..7527c081726e 100644
--- a/fs/afs/volume.c
+++ b/fs/afs/volume.c
@@ -88,16 +88,16 @@ static struct afs_vldb_entry *afs_vl_lookup_vldb(struct afs_cell *cell,
 			case VL_SERVICE:
 				clear_bit(vc.ac.index, &vc.ac.alist->yfs);
 				set_bit(vc.ac.index, &vc.ac.alist->probed);
-				vc.ac.addr->srx_service = ret;
+				vc.ac.alist->addrs[vc.ac.index].srx_service = ret;
 				break;
 			case YFS_VL_SERVICE:
 				set_bit(vc.ac.index, &vc.ac.alist->yfs);
 				set_bit(vc.ac.index, &vc.ac.alist->probed);
-				vc.ac.addr->srx_service = ret;
+				vc.ac.alist->addrs[vc.ac.index].srx_service = ret;
 				break;
 			}
 		}
-		
+
 		vldb = afs_vl_get_entry_by_name_u(&vc, volname, volnamesz);
 	}