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| author |   David Howells <dhowells@redhat.com> | 2020-04-16 17:05:28 +0100 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2020-05-31 15:19:51 +0100 |
| commit | 810068059234551b6973b46ca572e654f0c5e665 (patch) | |
| tree | ed26ef4ccce3b30d5b20c731234e763dea699eba /fs/afs/internal.h | |
| parent | afs: Always include dir in bulk status fetch from afs_do_lookup() (diff) | |
| download | linux-dev-810068059234551b6973b46ca572e654f0c5e665.tar.xz linux-dev-810068059234551b6973b46ca572e654f0c5e665.zip | |
afs: Use the serverUnique field in the UVLDB record to reduce rpc ops
The U-version VLDB volume record retrieved by the VL.GetEntryByNameU rpc op
carries a change counter (the serverUnique field) for each fileserver
listed in the record as backing that volume. This is incremented whenever
the registration details for a fileserver change (such as its address
list). Note that the same value will be seen in all UVLDB records that
refer to that fileserver.
This should be checked before calling the VL server to re-query the address
list for a fileserver. If it's the same, there's no point doing the query.
Reported-by: Jeffrey Altman <jaltman@auristor.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'fs/afs/internal.h')
| -rw-r--r-- | fs/afs/internal.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/afs/internal.h b/fs/afs/internal.h index 80255513e230..ee17c868ad2c 100644 --- a/fs/afs/internal.h +++ b/fs/afs/internal.h @@ -471,6 +471,7 @@ struct afs_vldb_entry { #define AFS_VLDB_QUERY_ERROR 4 /* - VL server returned error */ uuid_t fs_server[AFS_NMAXNSERVERS]; + u32 addr_version[AFS_NMAXNSERVERS]; /* Registration change counters */ u8 fs_mask[AFS_NMAXNSERVERS]; #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */ #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */ @@ -498,7 +499,6 @@ struct afs_server { struct hlist_node proc_link; /* Link in net->fs_proc */ struct afs_server *gc_next; /* Next server in manager's list */ time64_t put_time; /* Time at which last put */ - time64_t update_at; /* Time at which to next update the record */ unsigned long flags; #define AFS_SERVER_FL_NOT_READY 1 /* The record is not ready for use */ #define AFS_SERVER_FL_NOT_FOUND 2 /* VL server says no such server */ @@ -511,6 +511,7 @@ struct afs_server { #define AFS_SERVER_FL_IS_YFS 9 /* Server is YFS not AFS */ #define AFS_SERVER_FL_NO_RM2 10 /* Fileserver doesn't support YFS.RemoveFile2 */ #define AFS_SERVER_FL_HAVE_EPOCH 11 /* ->epoch is valid */ +#define AFS_SERVER_FL_NEEDS_UPDATE 12 /* Fileserver address list is out of date */ atomic_t usage; u32 addr_version; /* Address list version */ u32 cm_epoch; /* Server RxRPC epoch */ @@ -1241,7 +1242,7 @@ extern spinlock_t afs_server_peer_lock; extern struct afs_server *afs_find_server(struct afs_net *, const struct sockaddr_rxrpc *); extern struct afs_server *afs_find_server_by_uuid(struct afs_net *, const uuid_t *); -extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *); +extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *, u32); extern struct afs_server *afs_get_server(struct afs_server *, enum afs_server_trace); extern void afs_put_server(struct afs_net *, struct afs_server *, enum afs_server_trace); extern void afs_manage_servers(struct work_struct *); |