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NFS: test and free stateids during recovery

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When recovering open files and locks, the stateid should be tested
against the server and freed if it is invalid.  This patch adds new
recovery functions for NFS v4.1.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Bryan Schumaker 2011-06-02 14:59:10 -04:00 committed by Trond Myklebust
parent 9aeda35fd6
commit f062eb6ced
1 changed files with 34 additions and 3 deletions
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37
fs/nfs/nfs4proc.c
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@ -80,7 +80,10 @@ static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
struct nfs_fattr *fattr, struct iattr *sattr,
struct nfs4_state *state);
#ifdef CONFIG_NFS_V4_1
static int nfs41_test_stateid(struct nfs_server *, struct nfs4_state *);
static int nfs41_free_stateid(struct nfs_server *, struct nfs4_state *);
#endif
/* Prevent leaks of NFSv4 errors into userland */
static int nfs4_map_errors(int err)
{
@ -1687,6 +1690,20 @@ static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *sta
return ret;
}
#if defined(CONFIG_NFS_V4_1)
static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
{
int status;
struct nfs_server *server = NFS_SERVER(state->inode);
status = nfs41_test_stateid(server, state);
if (status == NFS_OK)
return 0;
nfs41_free_stateid(server, state);
return nfs4_open_expired(sp, state);
}
#endif
/*
* on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
* fields corresponding to attributes that were used to store the verifier.
@ -4444,6 +4461,20 @@ static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request
return err;
}
#if defined(CONFIG_NFS_V4_1)
static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
{
int status;
struct nfs_server *server = NFS_SERVER(state->inode);
status = nfs41_test_stateid(server, state);
if (status == NFS_OK)
return 0;
nfs41_free_stateid(server, state);
return nfs4_lock_expired(state, request);
}
#endif
static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
{
struct nfs_inode *nfsi = NFS_I(state->inode);
@ -6109,8 +6140,8 @@ struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
.owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
.state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
.recover_open = nfs4_open_expired,
.recover_lock = nfs4_lock_expired,
.recover_open = nfs41_open_expired,
.recover_lock = nfs41_lock_expired,
.establish_clid = nfs41_init_clientid,
.get_clid_cred = nfs4_get_exchange_id_cred,
};