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Subject[PATCH v4 08/16] fuse: export fuse_dequeue_forget() function
Date
From: Vivek Goyal <vgoyal@redhat.com>

File systems like virtio-fs need to do not have to play directly with
forget list data structures. There is a helper function use that instead.

Rename dequeue_forget() to fuse_dequeue_forget() and export it so that
stacked filesystems can use it.

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
---
fs/fuse/dev.c | 13 +++++++------
fs/fuse/fuse_i.h | 4 ++++
2 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index 167f476fbe16..c0c30a225e78 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -1185,9 +1185,9 @@ __releases(fiq->waitq.lock)
return err ? err : reqsize;
}

-static struct fuse_forget_link *dequeue_forget(struct fuse_iqueue *fiq,
- unsigned max,
- unsigned *countp)
+struct fuse_forget_link *fuse_dequeue_forget(struct fuse_iqueue *fiq,
+ unsigned int max,
+ unsigned int *countp)
{
struct fuse_forget_link *head = fiq->forget_list_head.next;
struct fuse_forget_link **newhead = &head;
@@ -1206,6 +1206,7 @@ static struct fuse_forget_link *dequeue_forget(struct fuse_iqueue *fiq,

return head;
}
+EXPORT_SYMBOL(fuse_dequeue_forget);

static int fuse_read_single_forget(struct fuse_iqueue *fiq,
struct fuse_copy_state *cs,
@@ -1213,7 +1214,7 @@ static int fuse_read_single_forget(struct fuse_iqueue *fiq,
__releases(fiq->waitq.lock)
{
int err;
- struct fuse_forget_link *forget = dequeue_forget(fiq, 1, NULL);
+ struct fuse_forget_link *forget = fuse_dequeue_forget(fiq, 1, NULL);
struct fuse_forget_in arg = {
.nlookup = forget->forget_one.nlookup,
};
@@ -1261,7 +1262,7 @@ __releases(fiq->waitq.lock)
}

max_forgets = (nbytes - ih.len) / sizeof(struct fuse_forget_one);
- head = dequeue_forget(fiq, max_forgets, &count);
+ head = fuse_dequeue_forget(fiq, max_forgets, &count);
spin_unlock(&fiq->waitq.lock);

arg.count = count;
@@ -2249,7 +2250,7 @@ void fuse_abort_conn(struct fuse_conn *fc)
clear_bit(FR_PENDING, &req->flags);
list_splice_tail_init(&fiq->pending, &to_end);
while (forget_pending(fiq))
- kfree(dequeue_forget(fiq, 1, NULL));
+ kfree(fuse_dequeue_forget(fiq, 1, NULL));
wake_up_all_locked(&fiq->waitq);
spin_unlock(&fiq->waitq.lock);
kill_fasync(&fiq->fasync, SIGIO, POLL_IN);
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index 7e19c936ece8..6533be37873f 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -820,6 +820,10 @@ void fuse_queue_forget(struct fuse_conn *fc, struct fuse_forget_link *forget,

struct fuse_forget_link *fuse_alloc_forget(void);

+struct fuse_forget_link *fuse_dequeue_forget(struct fuse_iqueue *fiq,
+ unsigned int max,
+ unsigned int *countp);
+
/* Used by READDIRPLUS */
void fuse_force_forget(struct file *file, u64 nodeid);

--
2.21.0
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