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NFSv4.1: do not use deviceids after MDS clientid invalidation

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Mark all deviceids established under an expired MDS clientid as invalid.
Stop all new i/o through DS and send through the MDS.
Don't use any new LAYOUTGETs that use the invalid deviceid. Purge all layouts
established under the expired MDS clientid.
Remove the MDS clientid deviceid and data servers reference

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Andy Adamson 2011-06-15 17:52:40 -04:00 • committed by Trond Myklebust
parent a56aaa02b1
commit c47abcf8ff
5 changed files with 47 additions and 0 deletions
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20
fs/nfs/pnfs_dev.c
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@ -156,6 +156,7 @@ nfs4_init_deviceid_node(struct nfs4_deviceid_node *d,
INIT_HLIST_NODE(&d->tmpnode);
d->ld = ld;
d->nfs_client = nfs_client;
d->flags = 0;
d->deviceid = *id;
atomic_set(&d->ref, 1);
}
@ -253,3 +254,22 @@ nfs4_deviceid_purge_client(const struct nfs_client *clp)
for (h = 0; h < NFS4_DEVICE_ID_HASH_SIZE; h++)
_deviceid_purge_client(clp, h);
}
/*
* Stop use of all deviceids associated with an nfs_client
*/
void
nfs4_deviceid_mark_client_invalid(struct nfs_client *clp)
{
struct nfs4_deviceid_node *d;
struct hlist_node *n;
int i;
rcu_read_lock();
for (i = 0; i < NFS4_DEVICE_ID_HASH_SIZE; i ++){
hlist_for_each_entry_rcu(d, n, &nfs4_deviceid_cache[i], node)
if (d->nfs_client == clp)
set_bit(NFS_DEVICEID_INVALID, &d->flags);
}
rcu_read_unlock();
}