#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) */
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 */
#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+#define AFS_SERVER_FL_NEEDS_UPDATE 12 /* Fileserver address list is out of date */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 */
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 *);
#include "protocol_yfs.h"
static unsigned afs_server_gc_delay = 10; /* Server record timeout in seconds */
-static unsigned afs_server_update_delay = 30; /* Time till VLDB recheck in secs */
static atomic_t afs_server_debug_id;
static void afs_inc_servers_outstanding(struct afs_net *net)
RCU_INIT_POINTER(server->addresses, alist);
server->addr_version = alist->version;
server->uuid = *uuid;
- server->update_at = ktime_get_real_seconds() + afs_server_update_delay;
rwlock_init(&server->fs_lock);
INIT_HLIST_HEAD(&server->cb_volumes);
rwlock_init(&server->cb_break_lock);
* Get or create a fileserver record.
*/
struct afs_server *afs_lookup_server(struct afs_cell *cell, struct key *key,
- const uuid_t *uuid)
+ const uuid_t *uuid, u32 addr_version)
{
struct afs_addr_list *alist;
struct afs_server *server, *candidate;
_enter("%p,%pU", cell->net, uuid);
server = afs_find_server_by_uuid(cell->net, uuid);
- if (server)
+ if (server) {
+ if (server->addr_version != addr_version)
+ set_bit(AFS_SERVER_FL_NEEDS_UPDATE, &server->flags);
return server;
+ }
alist = afs_vl_lookup_addrs(cell, key, uuid);
if (IS_ERR(alist))
write_unlock(&server->fs_lock);
}
- server->update_at = ktime_get_real_seconds() + afs_server_update_delay;
afs_put_addrlist(discard);
_leave(" = t");
return true;
*/
bool afs_check_server_record(struct afs_fs_cursor *fc, struct afs_server *server)
{
- time64_t now = ktime_get_real_seconds();
- long diff;
bool success;
int ret, retries = 0;
ASSERT(server);
retry:
- diff = READ_ONCE(server->update_at) - now;
- if (diff > 0) {
- _leave(" = t [not now %ld]", diff);
- return true;
- }
+ if (test_bit(AFS_SERVER_FL_UPDATING, &server->flags))
+ goto wait;
+ if (test_bit(AFS_SERVER_FL_NEEDS_UPDATE, &server->flags))
+ goto update;
+ _leave(" = t [good]");
+ return true;
+update:
if (!test_and_set_bit_lock(AFS_SERVER_FL_UPDATING, &server->flags)) {
+ clear_bit(AFS_SERVER_FL_NEEDS_UPDATE, &server->flags);
success = afs_update_server_record(fc, server);
clear_bit_unlock(AFS_SERVER_FL_UPDATING, &server->flags);
wake_up_bit(&server->flags, AFS_SERVER_FL_UPDATING);
return success;
}
+wait:
ret = wait_on_bit(&server->flags, AFS_SERVER_FL_UPDATING,
(fc->flags & AFS_FS_CURSOR_INTR) ?
TASK_INTERRUPTIBLE : TASK_UNINTERRUPTIBLE);