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-rw-r--r--fs/nfs/nfs4proc.c110
-rw-r--r--fs/nfs/nfs4state.c6
-rw-r--r--fs/nfs/nfs4xdr.c14
3 files changed, 86 insertions, 44 deletions
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 9ba89e7cdd2..5154ddf6d9a 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -189,6 +189,21 @@ static void update_changeattr(struct inode *inode, struct nfs4_change_info *cinf
nfsi->change_attr = cinfo->after;
}
+/* Helper for asynchronous RPC calls */
+static int nfs4_call_async(struct rpc_clnt *clnt, rpc_action tk_begin,
+ rpc_action tk_exit, void *calldata)
+{
+ struct rpc_task *task;
+
+ if (!(task = rpc_new_task(clnt, tk_exit, RPC_TASK_ASYNC)))
+ return -ENOMEM;
+
+ task->tk_calldata = calldata;
+ task->tk_action = tk_begin;
+ rpc_execute(task);
+ return 0;
+}
+
static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
{
struct inode *inode = state->inode;
@@ -810,11 +825,24 @@ struct nfs4_closedata {
struct nfs_closeres res;
};
+static void nfs4_free_closedata(struct nfs4_closedata *calldata)
+{
+ struct nfs4_state *state = calldata->state;
+ struct nfs4_state_owner *sp = state->owner;
+ struct nfs_server *server = NFS_SERVER(calldata->inode);
+
+ nfs4_put_open_state(calldata->state);
+ nfs_free_seqid(calldata->arg.seqid);
+ up(&sp->so_sema);
+ nfs4_put_state_owner(sp);
+ up_read(&server->nfs4_state->cl_sem);
+ kfree(calldata);
+}
+
static void nfs4_close_done(struct rpc_task *task)
{
struct nfs4_closedata *calldata = (struct nfs4_closedata *)task->tk_calldata;
struct nfs4_state *state = calldata->state;
- struct nfs4_state_owner *sp = state->owner;
struct nfs_server *server = NFS_SERVER(calldata->inode);
/* hmm. we are done with the inode, and in the process of freeing
@@ -838,25 +866,46 @@ static void nfs4_close_done(struct rpc_task *task)
}
}
state->state = calldata->arg.open_flags;
- nfs4_put_open_state(state);
- nfs_free_seqid(calldata->arg.seqid);
- up(&sp->so_sema);
- nfs4_put_state_owner(sp);
- up_read(&server->nfs4_state->cl_sem);
- kfree(calldata);
+ nfs4_free_closedata(calldata);
}
-static inline int nfs4_close_call(struct rpc_clnt *clnt, struct nfs4_closedata *calldata)
+static void nfs4_close_begin(struct rpc_task *task)
{
+ struct nfs4_closedata *calldata = (struct nfs4_closedata *)task->tk_calldata;
+ struct nfs4_state *state = calldata->state;
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
.rpc_argp = &calldata->arg,
.rpc_resp = &calldata->res,
- .rpc_cred = calldata->state->owner->so_cred,
+ .rpc_cred = state->owner->so_cred,
};
- if (calldata->arg.open_flags != 0)
+ int mode = 0;
+ int status;
+
+ status = nfs_wait_on_sequence(calldata->arg.seqid, task);
+ if (status != 0)
+ return;
+ /* Don't reorder reads */
+ smp_rmb();
+ /* Recalculate the new open mode in case someone reopened the file
+ * while we were waiting in line to be scheduled.
+ */
+ if (state->nreaders != 0)
+ mode |= FMODE_READ;
+ if (state->nwriters != 0)
+ mode |= FMODE_WRITE;
+ if (test_bit(NFS_DELEGATED_STATE, &state->flags))
+ state->state = mode;
+ if (mode == state->state) {
+ nfs4_free_closedata(calldata);
+ task->tk_exit = NULL;
+ rpc_exit(task, 0);
+ return;
+ }
+ if (mode != 0)
msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
- return rpc_call_async(clnt, &msg, 0, nfs4_close_done, calldata);
+ calldata->arg.open_flags = mode;
+ rpc_call_setup(task, &msg, 0);
}
/*
@@ -873,35 +922,30 @@ static inline int nfs4_close_call(struct rpc_clnt *clnt, struct nfs4_closedata *
int nfs4_do_close(struct inode *inode, struct nfs4_state *state, mode_t mode)
{
struct nfs4_closedata *calldata;
- int status;
+ int status = -ENOMEM;
- /* Tell caller we're done */
- if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
- state->state = mode;
- return 0;
- }
- calldata = (struct nfs4_closedata *)kmalloc(sizeof(*calldata), GFP_KERNEL);
+ calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
if (calldata == NULL)
- return -ENOMEM;
+ goto out;
calldata->inode = inode;
calldata->state = state;
calldata->arg.fh = NFS_FH(inode);
+ calldata->arg.stateid = &state->stateid;
/* Serialization for the sequence id */
calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
- if (calldata->arg.seqid == NULL) {
- kfree(calldata);
- return -ENOMEM;
- }
- calldata->arg.open_flags = mode;
- memcpy(&calldata->arg.stateid, &state->stateid,
- sizeof(calldata->arg.stateid));
- status = nfs4_close_call(NFS_SERVER(inode)->client, calldata);
- /*
- * Return -EINPROGRESS on success in order to indicate to the
- * caller that an asynchronous RPC call has been launched, and
- * that it will release the semaphores on completion.
- */
- return (status == 0) ? -EINPROGRESS : status;
+ if (calldata->arg.seqid == NULL)
+ goto out_free_calldata;
+
+ status = nfs4_call_async(NFS_SERVER(inode)->client, nfs4_close_begin,
+ nfs4_close_done, calldata);
+ if (status == 0)
+ goto out;
+
+ nfs_free_seqid(calldata->arg.seqid);
+out_free_calldata:
+ kfree(calldata);
+out:
+ return status;
}
struct inode *
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index f535c219cf3..59c93f37e1b 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -518,7 +518,11 @@ void nfs4_close_state(struct nfs4_state *state, mode_t mode)
newstate |= FMODE_WRITE;
if (state->state == newstate)
goto out;
- if (nfs4_do_close(inode, state, newstate) == -EINPROGRESS)
+ if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
+ state->state = newstate;
+ goto out;
+ }
+ if (nfs4_do_close(inode, state, newstate) == 0)
return;
}
out:
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index fcd28a29a2f..934ec50ea6b 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -602,10 +602,10 @@ static int encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
{
uint32_t *p;
- RESERVE_SPACE(8+sizeof(arg->stateid.data));
+ RESERVE_SPACE(8+sizeof(arg->stateid->data));
WRITE32(OP_CLOSE);
WRITE32(arg->seqid->sequence->counter);
- WRITEMEM(arg->stateid.data, sizeof(arg->stateid.data));
+ WRITEMEM(arg->stateid->data, sizeof(arg->stateid->data));
return 0;
}
@@ -950,9 +950,9 @@ static int encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closea
{
uint32_t *p;
- RESERVE_SPACE(8+sizeof(arg->stateid.data));
+ RESERVE_SPACE(8+sizeof(arg->stateid->data));
WRITE32(OP_OPEN_DOWNGRADE);
- WRITEMEM(arg->stateid.data, sizeof(arg->stateid.data));
+ WRITEMEM(arg->stateid->data, sizeof(arg->stateid->data));
WRITE32(arg->seqid->sequence->counter);
encode_share_access(xdr, arg->open_flags);
return 0;
@@ -1416,9 +1416,6 @@ static int nfs4_xdr_enc_close(struct rpc_rqst *req, uint32_t *p, struct nfs_clos
};
int status;
- status = nfs_wait_on_sequence(args->seqid, req->rq_task);
- if (status != 0)
- goto out;
xdr_init_encode(&xdr, &req->rq_snd_buf, p);
encode_compound_hdr(&xdr, &hdr);
status = encode_putfh(&xdr, args->fh);
@@ -1518,9 +1515,6 @@ static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, uint32_t *p, struct
};
int status;
- status = nfs_wait_on_sequence(args->seqid, req->rq_task);
- if (status != 0)
- goto out;
xdr_init_encode(&xdr, &req->rq_snd_buf, p);
encode_compound_hdr(&xdr, &hdr);
status = encode_putfh(&xdr, args->fh);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-17 21:41:32 +0000