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fuse: allocate for_background dio requests based on io->async state 

Commit 8b41e671 introduced explicit background checking for fuse_req
structures with BUG_ON() checks for the appropriate type of request in
in the associated send functions. Commit bcba24cc introduced the ability
to send dio requests as background requests but does not update the
request allocation based on the type of I/O request. As a result, a
BUG_ON() triggers in the fuse_request_send_background() background path if
an async I/O is sent.

Allocate a request based on the async state of the fuse_io_priv to avoid
the BUG.

Signed-off-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
This commit is contained in:
Brian Foster 2013-05-14 11:25:39 -04:00 committed by Miklos Szeredi
parent f722406faa
commit de82b92301
1 changed files with 9 additions and 2 deletions
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11
fs/fuse/file.c
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@ -1278,7 +1278,10 @@ ssize_t fuse_direct_io(struct fuse_io_priv *io, const struct iovec *iov,
iov_iter_init(&ii, iov, nr_segs, count, 0);
req = fuse_get_req(fc, fuse_iter_npages(&ii));
if (io->async)
req = fuse_get_req_for_background(fc, fuse_iter_npages(&ii));
else
req = fuse_get_req(fc, fuse_iter_npages(&ii));
if (IS_ERR(req))
return PTR_ERR(req);
@ -1314,7 +1317,11 @@ ssize_t fuse_direct_io(struct fuse_io_priv *io, const struct iovec *iov,
break;
if (count) {
fuse_put_request(fc, req);
req = fuse_get_req(fc, fuse_iter_npages(&ii));
if (io->async)
req = fuse_get_req_for_background(fc,
fuse_iter_npages(&ii));
else
req = fuse_get_req(fc, fuse_iter_npages(&ii));
if (IS_ERR(req))
break;
}