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fuse: separate out processing queue 

This is just two fields: fc->io and fc->processing.

This patch just rearranges the fields, no functional change.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Reviewed-by: Ashish Samant <ashish.samant@oracle.com>
This commit is contained in:
Miklos Szeredi 2015-07-01 16:26:04 +02:00
parent 5250921bb0
commit 3a2b5b9cd9
3 changed files with 30 additions and 16 deletions
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21
fs/fuse/dev.c
View File

@ -1240,6 +1240,7 @@ static ssize_t fuse_dev_do_read(struct fuse_conn *fc, struct file *file,
{
int err;
struct fuse_iqueue *fiq = &fc->iq;
struct fuse_pqueue *fpq = &fc->pq;
struct fuse_req *req;
struct fuse_in *in;
unsigned reqsize;
@ -1280,7 +1281,7 @@ static ssize_t fuse_dev_do_read(struct fuse_conn *fc, struct file *file,
spin_unlock(&fiq->waitq.lock);
spin_lock(&fc->lock);
list_add(&req->list, &fc->io);
list_add(&req->list, &fpq->io);
in = &req->in;
reqsize = in->h.len;
@ -1314,7 +1315,7 @@ static ssize_t fuse_dev_do_read(struct fuse_conn *fc, struct file *file,
if (!test_bit(FR_ISREPLY, &req->flags)) {
request_end(fc, req);
} else {
list_move_tail(&req->list, &fc->processing);
list_move_tail(&req->list, &fpq->processing);
set_bit(FR_SENT, &req->flags);
/* matches barrier in request_wait_answer() */
smp_mb__after_atomic();
@ -1815,11 +1816,11 @@ static int fuse_notify(struct fuse_conn *fc, enum fuse_notify_code code,
}
/* Look up request on processing list by unique ID */
static struct fuse_req *request_find(struct fuse_conn *fc, u64 unique)
static struct fuse_req *request_find(struct fuse_pqueue *fpq, u64 unique)
{
struct fuse_req *req;
list_for_each_entry(req, &fc->processing, list) {
list_for_each_entry(req, &fpq->processing, list) {
if (req->in.h.unique == unique || req->intr_unique == unique)
return req;
}
@ -1860,6 +1861,7 @@ static ssize_t fuse_dev_do_write(struct fuse_conn *fc,
struct fuse_copy_state *cs, size_t nbytes)
{
int err;
struct fuse_pqueue *fpq = &fc->pq;
struct fuse_req *req;
struct fuse_out_header oh;
@ -1892,7 +1894,7 @@ static ssize_t fuse_dev_do_write(struct fuse_conn *fc,
if (!fc->connected)
goto err_unlock;
req = request_find(fc, oh.unique);
req = request_find(fpq, oh.unique);
if (!req)
goto err_unlock;
@ -1913,7 +1915,7 @@ static ssize_t fuse_dev_do_write(struct fuse_conn *fc,
}
clear_bit(FR_SENT, &req->flags);
list_move(&req->list, &fc->io);
list_move(&req->list, &fpq->io);
req->out.h = oh;
set_bit(FR_LOCKED, &req->flags);
cs->req = req;
@ -2112,6 +2114,7 @@ static void end_polls(struct fuse_conn *fc)
void fuse_abort_conn(struct fuse_conn *fc)
{
struct fuse_iqueue *fiq = &fc->iq;
struct fuse_pqueue *fpq = &fc->pq;
spin_lock(&fc->lock);
if (fc->connected) {
@ -2122,7 +2125,7 @@ void fuse_abort_conn(struct fuse_conn *fc)
fc->connected = 0;
fc->blocked = 0;
fuse_set_initialized(fc);
list_for_each_entry_safe(req, next, &fc->io, list) {
list_for_each_entry_safe(req, next, &fpq->io, list) {
req->out.h.error = -ECONNABORTED;
spin_lock(&req->waitq.lock);
set_bit(FR_ABORTED, &req->flags);
@ -2142,7 +2145,7 @@ void fuse_abort_conn(struct fuse_conn *fc)
spin_unlock(&fiq->waitq.lock);
kill_fasync(&fiq->fasync, SIGIO, POLL_IN);
list_splice_init(&fc->processing, &to_end2);
list_splice_init(&fpq->processing, &to_end2);
while (!list_empty(&to_end1)) {
req = list_first_entry(&to_end1, struct fuse_req, list);
__fuse_get_request(req);
@ -2161,7 +2164,7 @@ int fuse_dev_release(struct inode *inode, struct file *file)
{
struct fuse_conn *fc = fuse_get_conn(file);
if (fc) {
WARN_ON(!list_empty(&fc->io));
WARN_ON(!list_empty(&fc->pq.io));
WARN_ON(fc->iq.fasync != NULL);
fuse_abort_conn(fc);
fuse_conn_put(fc);

15
fs/fuse/fuse_i.h
View File

@ -401,6 +401,14 @@ struct fuse_iqueue {
struct fasync_struct *fasync;
};
struct fuse_pqueue {
/** The list of requests being processed */
struct list_head processing;
/** The list of requests under I/O */
struct list_head io;
};
/**
* A Fuse connection.
*
@ -435,11 +443,8 @@ struct fuse_conn {
/** Input queue */
struct fuse_iqueue iq;
/** The list of requests being processed */
struct list_head processing;
/** The list of requests under I/O */
struct list_head io;
/** Processing queue */
struct fuse_pqueue pq;
/** The next unique kernel file handle */
u64 khctr;

10
fs/fuse/inode.c
View File

@ -577,6 +577,13 @@ static void fuse_iqueue_init(struct fuse_iqueue *fiq)
fiq->connected = 1;
}
static void fuse_pqueue_init(struct fuse_pqueue *fpq)
{
memset(fpq, 0, sizeof(struct fuse_pqueue));
INIT_LIST_HEAD(&fpq->processing);
INIT_LIST_HEAD(&fpq->io);
}
void fuse_conn_init(struct fuse_conn *fc)
{
memset(fc, 0, sizeof(*fc));
@ -586,8 +593,7 @@ void fuse_conn_init(struct fuse_conn *fc)
init_waitqueue_head(&fc->blocked_waitq);
init_waitqueue_head(&fc->reserved_req_waitq);
fuse_iqueue_init(&fc->iq);
INIT_LIST_HEAD(&fc->processing);
INIT_LIST_HEAD(&fc->io);
fuse_pqueue_init(&fc->pq);
INIT_LIST_HEAD(&fc->bg_queue);
INIT_LIST_HEAD(&fc->entry);
atomic_set(&fc->num_waiting, 0);