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>

3 files changed, 30 insertions, 16 deletions

diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index b6f901a0dbdd..0fae2a7ded77 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -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);
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index e8be4611fb8e..3620eec018a4 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -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;
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index caf77d5a6e8d..7b146bb68dd5 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -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);