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fuse: Do some refactoring in fuse_dev_do_write()

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This is needed for next patch.

Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
This commit is contained in:
Kirill Tkhai 2018-11-08 12:05:36 +03:00 committed by Miklos Szeredi
parent 5e0fed717a
commit 7407a10de5
1 changed files with 23 additions and 25 deletions
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48
fs/fuse/dev.c
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@ -1915,16 +1915,17 @@ static ssize_t fuse_dev_do_write(struct fuse_dev *fud,
struct fuse_req *req;
struct fuse_out_header oh;
err = -EINVAL;
if (nbytes < sizeof(struct fuse_out_header))
return -EINVAL;
goto out;
err = fuse_copy_one(cs, &oh, sizeof(oh));
if (err)
goto err_finish;
goto copy_finish;
err = -EINVAL;
if (oh.len != nbytes)
goto err_finish;
goto copy_finish;
/*
* Zero oh.unique indicates unsolicited notification message
@ -1932,41 +1933,40 @@ static ssize_t fuse_dev_do_write(struct fuse_dev *fud,
*/
if (!oh.unique) {
err = fuse_notify(fc, oh.error, nbytes - sizeof(oh), cs);
return err ? err : nbytes;
goto out;
}
err = -EINVAL;
if (oh.error <= -1000 || oh.error > 0)
goto err_finish;
goto copy_finish;
spin_lock(&fpq->lock);
err = -ENOENT;
if (!fpq->connected)
goto err_unlock_pq;
req = NULL;
if (fpq->connected)
req = request_find(fpq, oh.unique & ~FUSE_INT_REQ_BIT);
req = request_find(fpq, oh.unique & ~FUSE_INT_REQ_BIT);
if (!req)
goto err_unlock_pq;
err = -ENOENT;
if (!req) {
spin_unlock(&fpq->lock);
goto copy_finish;
}
/* Is it an interrupt reply ID? */
if (oh.unique & FUSE_INT_REQ_BIT) {
__fuse_get_request(req);
spin_unlock(&fpq->lock);
err = -EINVAL;
if (nbytes != sizeof(struct fuse_out_header)) {
fuse_put_request(fc, req);
goto err_finish;
}
if (oh.error == -ENOSYS)
err = 0;
if (nbytes != sizeof(struct fuse_out_header))
err = -EINVAL;
else if (oh.error == -ENOSYS)
fc->no_interrupt = 1;
else if (oh.error == -EAGAIN)
queue_interrupt(&fc->iq, req);
fuse_put_request(fc, req);
fuse_copy_finish(cs);
return nbytes;
goto copy_finish;
}
clear_bit(FR_SENT, &req->flags);
@ -1992,14 +1992,12 @@ static ssize_t fuse_dev_do_write(struct fuse_dev *fud,
spin_unlock(&fpq->lock);
request_end(fc, req);
out:
return err ? err : nbytes;
err_unlock_pq:
spin_unlock(&fpq->lock);
err_finish:
copy_finish:
fuse_copy_finish(cs);
return err;
goto out;
}
static ssize_t fuse_dev_write(struct kiocb *iocb, struct iov_iter *from)