xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

fuse: make request allocations for background processing explicit

Browse Source 
There are two types of processing requests in FUSE: synchronous (via
fuse_request_send()) and asynchronous (via adding to fc->bg_queue).

Fortunately, the type of processing is always known in advance, at the time
of request allocation. This preparatory patch utilizes this fact making
fuse_get_req() aware about the type. Next patches will use it.

Signed-off-by: Maxim Patlasov <mpatlasov@parallels.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
This commit is contained in:
Maxim Patlasov
2013-03-21 18:02:04 +04:00
committed by Miklos Szeredi
parent 4c82456eeb
commit 8b41e6715e
5 changed files with 37 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
fs/fuse/dev.c
View File

@@ -130,7 +130,8 @@ static void fuse_req_init_context(struct fuse_req *req)
req->in.h.pid = current->pid;
}
struct fuse_req *fuse_get_req(struct fuse_conn *fc, unsigned npages)
static struct fuse_req *__fuse_get_req(struct fuse_conn *fc, unsigned npages,
bool for_background)
{
struct fuse_req *req;
sigset_t oldset;
@@ -156,14 +157,27 @@ struct fuse_req *fuse_get_req(struct fuse_conn *fc, unsigned npages)
fuse_req_init_context(req);
req->waiting = 1;
req->background = for_background;
return req;
out:
atomic_dec(&fc->num_waiting);
return ERR_PTR(err);
}
struct fuse_req *fuse_get_req(struct fuse_conn *fc, unsigned npages)
{
return __fuse_get_req(fc, npages, false);
}
EXPORT_SYMBOL_GPL(fuse_get_req);
struct fuse_req *fuse_get_req_for_background(struct fuse_conn *fc,
unsigned npages)
{
return __fuse_get_req(fc, npages, true);
}
EXPORT_SYMBOL_GPL(fuse_get_req_for_background);
/*
* Return request in fuse_file->reserved_req. However that may
* currently be in use. If that is the case, wait for it to become
@@ -232,6 +246,7 @@ struct fuse_req *fuse_get_req_nofail_nopages(struct fuse_conn *fc,
fuse_req_init_context(req);
req->waiting = 1;
req->background = 0;
return req;
}
@@ -442,6 +457,7 @@ __acquires(fc->lock)
static void __fuse_request_send(struct fuse_conn *fc, struct fuse_req *req)
{
BUG_ON(req->background);
spin_lock(&fc->lock);
if (!fc->connected)
req->out.h.error = -ENOTCONN;
@@ -469,7 +485,7 @@ EXPORT_SYMBOL_GPL(fuse_request_send);
static void fuse_request_send_nowait_locked(struct fuse_conn *fc,
struct fuse_req *req)
{
req->background = 1;
BUG_ON(!req->background);
fc->num_background++;
if (fc->num_background == fc->max_background)
fc->blocked = 1;