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[PATCH] fuse: introduce unified request state 

The state of request was made up of 2 bitfields (->sent and ->finished) and of
the fact that the request was on a list or not.

Unify this into a single state field.

Signed-off-by: Miklos Szeredi <miklos@szeredi.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Miklos Szeredi 2006-01-16 22:14:31 -08:00 committed by Linus Torvalds
parent 6383bdaa2e
commit 83cfd49351
2 changed files with 19 additions and 11 deletions
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14
fs/fuse/dev.c
View File

@ -181,7 +181,7 @@ static void process_init_reply(struct fuse_conn *fc, struct fuse_req *req)
*/
static void request_end(struct fuse_conn *fc, struct fuse_req *req)
{
req->finished = 1;
req->state = FUSE_REQ_FINISHED;
spin_unlock(&fuse_lock);
if (req->background) {
down_read(&fc->sbput_sem);
@ -250,10 +250,10 @@ static void request_wait_answer(struct fuse_conn *fc, struct fuse_req *req)
spin_unlock(&fuse_lock);
block_sigs(&oldset);
wait_event_interruptible(req->waitq, req->finished);
wait_event_interruptible(req->waitq, req->state == FUSE_REQ_FINISHED);
restore_sigs(&oldset);
spin_lock(&fuse_lock);
if (req->finished)
if (req->state == FUSE_REQ_FINISHED)
return;
req->out.h.error = -EINTR;
@ -268,10 +268,10 @@ static void request_wait_answer(struct fuse_conn *fc, struct fuse_req *req)
wait_event(req->waitq, !req->locked);
spin_lock(&fuse_lock);
}
if (!req->sent && !list_empty(&req->list)) {
if (req->state == FUSE_REQ_PENDING) {
list_del(&req->list);
__fuse_put_request(req);
} else if (!req->finished && req->sent)
} else if (req->state == FUSE_REQ_SENT)
background_request(fc, req);
}
@ -306,6 +306,7 @@ static void queue_request(struct fuse_conn *fc, struct fuse_req *req)
fc->outstanding_debt++;
}
list_add_tail(&req->list, &fc->pending);
req->state = FUSE_REQ_PENDING;
wake_up(&fc->waitq);
}
@ -639,6 +640,7 @@ static ssize_t fuse_dev_readv(struct file *file, const struct iovec *iov,
goto err_unlock;
req = list_entry(fc->pending.next, struct fuse_req, list);
req->state = FUSE_REQ_READING;
list_del_init(&req->list);
in = &req->in;
@ -672,7 +674,7 @@ static ssize_t fuse_dev_readv(struct file *file, const struct iovec *iov,
if (!req->isreply)
request_end(fc, req);
else {
req->sent = 1;
req->state = FUSE_REQ_SENT;
list_add_tail(&req->list, &fc->processing);
spin_unlock(&fuse_lock);
}

16
fs/fuse/fuse_i.h
View File

@ -111,6 +111,15 @@ struct fuse_out {
struct fuse_arg args[3];
};
/** The request state */
enum fuse_req_state {
FUSE_REQ_INIT = 0,
FUSE_REQ_PENDING,
FUSE_REQ_READING,
FUSE_REQ_SENT,
FUSE_REQ_FINISHED
};
/**
* A request to the client
*/
@ -140,11 +149,8 @@ struct fuse_req {
/** Data is being copied to/from the request */
unsigned locked:1;
/** Request has been sent to userspace */
unsigned sent:1;
/** The request is finished */
unsigned finished:1;
/** State of the request */
enum fuse_req_state state;
/** The request input */
struct fuse_in in;