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authorDavid Howells <dhowells@redhat.com>2020-04-30 01:03:49 +0100
committerDavid Howells <dhowells@redhat.com>2020-06-04 15:37:57 +0100
commit20325960f8750165964a6891a733e4cc15d19076 (patch)
treed372bb21037626d2fac40b9a1e6e6bea21786b8e /fs/afs/server.c
parentcca37d45d547434144409ae648a19b7eb6db5eb4 (diff)
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afs: Reorganise volume and server trees to be rooted on the cell
Reorganise afs_volume objects such that they're in a tree keyed on volume ID, rooted at on an afs_cell object rather than being in multiple trees, each of which is rooted on an afs_server object. afs_server structs become per-cell and acquire a pointer to the cell. The process of breaking a callback then starts with finding the server by its network address, following that to the cell and then looking up each volume ID in the volume tree. This is simpler than the afs_vol_interest/afs_cb_interest N:M mapping web and allows those structs and the code for maintaining them to be simplified or removed. It does make a couple of things a bit more tricky, though: (1) Operations now start with a volume, not a server, so there can be more than one answer as to whether or not the server we'll end up using supports the FS.InlineBulkStatus RPC. (2) CB RPC operations that specify the server UUID. There's still a tree of servers by UUID on the afs_net struct, but the UUIDs in it aren't guaranteed unique. Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'fs/afs/server.c')
-rw-r--r--fs/afs/server.c13
1 files changed, 7 insertions, 6 deletions
diff --git a/fs/afs/server.c b/fs/afs/server.c
index 1c1e315094ae..c51039a077cd 100644
--- a/fs/afs/server.c
+++ b/fs/afs/server.c
@@ -132,11 +132,12 @@ struct afs_server *afs_find_server_by_uuid(struct afs_net *net, const uuid_t *uu
/*
* Install a server record in the namespace tree
*/
-static struct afs_server *afs_install_server(struct afs_net *net,
+static struct afs_server *afs_install_server(struct afs_cell *cell,
struct afs_server *candidate)
{
const struct afs_addr_list *alist;
struct afs_server *server;
+ struct afs_net *net = cell->net;
struct rb_node **pp, *p;
int diff;
@@ -193,11 +194,12 @@ exists:
/*
* Allocate a new server record and mark it active.
*/
-static struct afs_server *afs_alloc_server(struct afs_net *net,
+static struct afs_server *afs_alloc_server(struct afs_cell *cell,
const uuid_t *uuid,
struct afs_addr_list *alist)
{
struct afs_server *server;
+ struct afs_net *net = cell->net;
_enter("");
@@ -212,11 +214,10 @@ static struct afs_server *afs_alloc_server(struct afs_net *net,
server->addr_version = alist->version;
server->uuid = *uuid;
rwlock_init(&server->fs_lock);
- server->cb_volumes = RB_ROOT;
- seqlock_init(&server->cb_break_lock);
init_waitqueue_head(&server->probe_wq);
INIT_LIST_HEAD(&server->probe_link);
spin_lock_init(&server->probe_lock);
+ server->cell = cell;
afs_inc_servers_outstanding(net);
trace_afs_server(server, 1, 1, afs_server_trace_alloc);
@@ -275,13 +276,13 @@ struct afs_server *afs_lookup_server(struct afs_cell *cell, struct key *key,
if (IS_ERR(alist))
return ERR_CAST(alist);
- candidate = afs_alloc_server(cell->net, uuid, alist);
+ candidate = afs_alloc_server(cell, uuid, alist);
if (!candidate) {
afs_put_addrlist(alist);
return ERR_PTR(-ENOMEM);
}
- server = afs_install_server(cell->net, candidate);
+ server = afs_install_server(cell, candidate);
if (server != candidate) {
afs_put_addrlist(alist);
kfree(candidate);