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Diffstat (limited to 'fs/nfs/nfs4state.c')
-rw-r--r--fs/nfs/nfs4state.c94
1 files changed, 30 insertions, 64 deletions
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index 2d5a6a2b9dec..0675f3215e0a 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -69,10 +69,8 @@ init_nfsv4_state(struct nfs_server *server)
void
destroy_nfsv4_state(struct nfs_server *server)
{
- if (server->mnt_path) {
- kfree(server->mnt_path);
- server->mnt_path = NULL;
- }
+ kfree(server->mnt_path);
+ server->mnt_path = NULL;
if (server->nfs4_state) {
nfs4_put_client(server->nfs4_state);
server->nfs4_state = NULL;
@@ -311,8 +309,7 @@ struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, struct
new = NULL;
}
spin_unlock(&clp->cl_lock);
- if (new)
- kfree(new);
+ kfree(new);
if (sp != NULL)
return sp;
put_rpccred(cred);
@@ -366,30 +363,21 @@ nfs4_alloc_open_state(void)
return state;
}
-static struct nfs4_state *
-__nfs4_find_state(struct inode *inode, struct rpc_cred *cred, mode_t mode)
+void
+nfs4_state_set_mode_locked(struct nfs4_state *state, mode_t mode)
{
- struct nfs_inode *nfsi = NFS_I(inode);
- struct nfs4_state *state;
-
- mode &= (FMODE_READ|FMODE_WRITE);
- list_for_each_entry(state, &nfsi->open_states, inode_states) {
- if (state->owner->so_cred != cred)
- continue;
- if ((mode & FMODE_READ) != 0 && state->nreaders == 0)
- continue;
- if ((mode & FMODE_WRITE) != 0 && state->nwriters == 0)
- continue;
- if ((state->state & mode) != mode)
- continue;
- atomic_inc(&state->count);
- if (mode & FMODE_READ)
- state->nreaders++;
+ if (state->state == mode)
+ return;
+ /* NB! List reordering - see the reclaim code for why. */
+ if ((mode & FMODE_WRITE) != (state->state & FMODE_WRITE)) {
if (mode & FMODE_WRITE)
- state->nwriters++;
- return state;
+ list_move(&state->open_states, &state->owner->so_states);
+ else
+ list_move_tail(&state->open_states, &state->owner->so_states);
}
- return NULL;
+ if (mode == 0)
+ list_del_init(&state->inode_states);
+ state->state = mode;
}
static struct nfs4_state *
@@ -400,7 +388,7 @@ __nfs4_find_state_byowner(struct inode *inode, struct nfs4_state_owner *owner)
list_for_each_entry(state, &nfsi->open_states, inode_states) {
/* Is this in the process of being freed? */
- if (state->nreaders == 0 && state->nwriters == 0)
+ if (state->state == 0)
continue;
if (state->owner == owner) {
atomic_inc(&state->count);
@@ -410,17 +398,6 @@ __nfs4_find_state_byowner(struct inode *inode, struct nfs4_state_owner *owner)
return NULL;
}
-struct nfs4_state *
-nfs4_find_state(struct inode *inode, struct rpc_cred *cred, mode_t mode)
-{
- struct nfs4_state *state;
-
- spin_lock(&inode->i_lock);
- state = __nfs4_find_state(inode, cred, mode);
- spin_unlock(&inode->i_lock);
- return state;
-}
-
static void
nfs4_free_open_state(struct nfs4_state *state)
{
@@ -481,7 +458,6 @@ void nfs4_put_open_state(struct nfs4_state *state)
spin_unlock(&inode->i_lock);
spin_unlock(&owner->so_lock);
iput(inode);
- BUG_ON (state->state != 0);
nfs4_free_open_state(state);
nfs4_put_state_owner(owner);
}
@@ -493,7 +469,7 @@ void nfs4_close_state(struct nfs4_state *state, mode_t mode)
{
struct inode *inode = state->inode;
struct nfs4_state_owner *owner = state->owner;
- int newstate;
+ int oldstate, newstate = 0;
atomic_inc(&owner->so_count);
/* Protect against nfs4_find_state() */
@@ -503,30 +479,20 @@ void nfs4_close_state(struct nfs4_state *state, mode_t mode)
state->nreaders--;
if (mode & FMODE_WRITE)
state->nwriters--;
- if (state->nwriters == 0) {
- if (state->nreaders == 0)
- list_del_init(&state->inode_states);
- /* See reclaim code */
- list_move_tail(&state->open_states, &owner->so_states);
+ oldstate = newstate = state->state;
+ if (state->nreaders == 0)
+ newstate &= ~FMODE_READ;
+ if (state->nwriters == 0)
+ newstate &= ~FMODE_WRITE;
+ if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
+ nfs4_state_set_mode_locked(state, newstate);
+ oldstate = newstate;
}
spin_unlock(&inode->i_lock);
spin_unlock(&owner->so_lock);
- newstate = 0;
- if (state->state != 0) {
- if (state->nreaders)
- newstate |= FMODE_READ;
- if (state->nwriters)
- newstate |= FMODE_WRITE;
- if (state->state == newstate)
- goto out;
- if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
- state->state = newstate;
- goto out;
- }
- if (nfs4_do_close(inode, state, newstate) == 0)
- return;
- }
-out:
+
+ if (oldstate != newstate && nfs4_do_close(inode, state) == 0)
+ return;
nfs4_put_open_state(state);
nfs4_put_state_owner(owner);
}
@@ -815,7 +781,7 @@ static int nfs4_reclaim_locks(struct nfs4_state_recovery_ops *ops, struct nfs4_s
int status = 0;
for (fl = inode->i_flock; fl != 0; fl = fl->fl_next) {
- if (!(fl->fl_flags & FL_POSIX))
+ if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK)))
continue;
if (((struct nfs_open_context *)fl->fl_file->private_data)->state != state)
continue;
@@ -830,7 +796,7 @@ static int nfs4_reclaim_locks(struct nfs4_state_recovery_ops *ops, struct nfs4_s
case -NFS4ERR_NO_GRACE:
case -NFS4ERR_RECLAIM_BAD:
case -NFS4ERR_RECLAIM_CONFLICT:
- /* kill_proc(fl->fl_owner, SIGLOST, 1); */
+ /* kill_proc(fl->fl_pid, SIGLOST, 1); */
break;
case -NFS4ERR_STALE_CLIENTID:
goto out_err;