linux-kernel - [PATCH 16/27] afs: Retain more of the VLDB record for alias detection

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Date:   Fri, 29 May 2020 23:02:01 +0100
From:   David Howells <dhowells@...hat.com>
To:     linux-afs@...ts.infradead.org
Cc:     dhowells@...hat.com, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 16/27] afs: Retain more of the VLDB record for alias detection

Save more bits from the volume location database record obtained for a
server so that we can use this information in cell alias detection.

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

 fs/afs/internal.h    |    3 ++-
 fs/afs/server_list.c |    3 +++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/fs/afs/internal.h b/fs/afs/internal.h
index 9f024c1bd650..dce03e068cab 100644
--- a/fs/afs/internal.h
+++ b/fs/afs/internal.h
@@ -546,7 +546,7 @@ struct afs_cb_interest {
 };
 
 /*
- * Replaceable server list.
+ * Replaceable volume server list.
  */
 struct afs_server_entry {
 	struct afs_server	*server;
@@ -554,6 +554,7 @@ struct afs_server_entry {
 };
 
 struct afs_server_list {
+	afs_volid_t		vids[AFS_MAXTYPES]; /* Volume IDs */
 	refcount_t		usage;
 	unsigned char		nr_servers;
 	unsigned char		preferred;	/* Preferred server */
diff --git a/fs/afs/server_list.c b/fs/afs/server_list.c
index b77e50f62459..a35f6951a74a 100644
--- a/fs/afs/server_list.c
+++ b/fs/afs/server_list.c
@@ -46,6 +46,9 @@ struct afs_server_list *afs_alloc_server_list(struct afs_cell *cell,
 	refcount_set(&slist->usage, 1);
 	rwlock_init(&slist->lock);
 
+	for (i = 0; i < AFS_MAXTYPES; i++)
+		slist->vids[i] = vldb->vid[i];
+
 	/* Make sure a records exists for each server in the list. */
 	for (i = 0; i < vldb->nr_servers; i++) {
 		if (!(vldb->fs_mask[i] & type_mask))