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9p: consolidate mux_rpc and request structure 

Currently, trans_fd has two structures (p9_req and p9_mux-rpc)
which contain mostly duplicate data.

This patch consolidates these two structures and removes p9_mux_rpc.

Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
This commit is contained in:
Eric Van Hensbergen 2008-10-13 18:45:24 -05:00
parent 5503ac5659
commit 21c003687e
1 changed files with 22 additions and 46 deletions
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68
net/9p/trans_fd.c
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@ -119,6 +119,8 @@ typedef void (*p9_conn_req_callback)(struct p9_req *req, void *a);
* @cba: argument to pass to callback
* @flush: flag to indicate RPC has been flushed
* @req_list: list link for higher level objects to chain requests
* @m: connection this request was issued on
* @wqueue: wait queue that client is blocked on for this rpc
*
*/
@ -132,6 +134,8 @@ struct p9_req {
void *cba;
int flush;
struct list_head req_list;
struct p9_conn *m;
wait_queue_head_t wqueue;
};
struct p9_poll_wait {
@ -186,25 +190,6 @@ struct p9_conn {
unsigned long wsched;
};
/**
* struct p9_mux_rpc - fd mux rpc accounting structure
* @m: connection this request was issued on
* @err: error state
* @tcall: request &p9_fcall
* @rcall: response &p9_fcall
* @wqueue: wait queue that client is blocked on for this rpc
*
* Bug: isn't this information duplicated elsewhere like &p9_req
*/
struct p9_mux_rpc {
struct p9_conn *m;
int err;
struct p9_fcall *tcall;
struct p9_fcall *rcall;
wait_queue_head_t wqueue;
};
static DEFINE_SPINLOCK(p9_poll_lock);
static LIST_HEAD(p9_poll_pending_list);
static struct workqueue_struct *p9_mux_wq;
@ -844,6 +829,8 @@ static struct p9_req *p9_send_request(struct p9_conn *m,
#endif
spin_lock_init(&req->lock);
req->m = m;
init_waitqueue_head(&req->wqueue);
req->tag = n;
req->tcall = tc;
req->rcall = NULL;
@ -954,20 +941,14 @@ p9_mux_flush_request(struct p9_conn *m, struct p9_req *req)
return 1;
}
static void
p9_conn_rpc_cb(struct p9_req *req, void *a)
static void p9_conn_rpc_cb(struct p9_req *req, void *a)
{
struct p9_mux_rpc *r;
P9_DPRINTK(P9_DEBUG_MUX, "req %p r %p\n", req, a);
r = a;
r->rcall = req->rcall;
r->err = req->err;
P9_DPRINTK(P9_DEBUG_MUX, "req %p arg %p\n", req, a);
if (req->flush != None && !req->err)
r->err = -ERESTARTSYS;
req->err = -ERESTARTSYS;
wake_up(&r->wqueue);
wake_up(&req->wqueue);
}
/**
@ -987,13 +968,6 @@ p9_fd_rpc(struct p9_client *client, struct p9_fcall *tc, struct p9_fcall **rc)
int err, sigpending;
unsigned long flags;
struct p9_req *req;
struct p9_mux_rpc r;
r.err = 0;
r.tcall = tc;
r.rcall = NULL;
r.m = m;
init_waitqueue_head(&r.wqueue);
if (rc)
*rc = NULL;
@ -1004,16 +978,17 @@ p9_fd_rpc(struct p9_client *client, struct p9_fcall *tc, struct p9_fcall **rc)
clear_thread_flag(TIF_SIGPENDING);
}
req = p9_send_request(m, tc, p9_conn_rpc_cb, &r);
req = p9_send_request(m, tc, p9_conn_rpc_cb, NULL);
if (IS_ERR(req)) {
err = PTR_ERR(req);
P9_DPRINTK(P9_DEBUG_MUX, "error %d\n", err);
return err;
}
err = wait_event_interruptible(r.wqueue, r.rcall != NULL || r.err < 0);
if (r.err < 0)
err = r.err;
err = wait_event_interruptible(req->wqueue, req->rcall != NULL ||
req->err < 0);
if (req->err < 0)
err = req->err;
if (err == -ERESTARTSYS && client->status == Connected
&& m->err == 0) {
@ -1021,10 +996,11 @@ p9_fd_rpc(struct p9_client *client, struct p9_fcall *tc, struct p9_fcall **rc)
/* wait until we get response of the flush message */
do {
clear_thread_flag(TIF_SIGPENDING);
err = wait_event_interruptible(r.wqueue,
r.rcall || r.err);
} while (!r.rcall && !r.err && err == -ERESTARTSYS &&
client->status == Connected && !m->err);
err = wait_event_interruptible(req->wqueue,
req->rcall || req->err);
} while (!req->rcall && !req->err &&
err == -ERESTARTSYS &&
client->status == Connected && !m->err);
err = -ERESTARTSYS;
}
@ -1038,9 +1014,9 @@ p9_fd_rpc(struct p9_client *client, struct p9_fcall *tc, struct p9_fcall **rc)
}
if (rc)
*rc = r.rcall;
*rc = req->rcall;
else
kfree(r.rcall);
kfree(req->rcall);
p9_mux_free_request(m, req);
if (err > 0)