From 9a261ca3a0ec6554b73eb23a299661832d4038c4 Mon Sep 17 00:00:00 2001
From: Antonio SJ Musumeci <trapexit@spawn.link>
Date: Fri, 13 Feb 2026 19:45:39 -0600
Subject: [PATCH] Remove fuse_ll_pipe dead code

---
 libfuse/lib/fuse_i.h          |  2 --
 libfuse/lib/fuse_lowlevel.cpp | 52 ++---------------------------------
 2 files changed, 2 insertions(+), 52 deletions(-)

diff --git a/libfuse/lib/fuse_i.h b/libfuse/lib/fuse_i.h
index 53d6896d..64e4bc19 100644
--- a/libfuse/lib/fuse_i.h
+++ b/libfuse/lib/fuse_i.h
@@ -52,8 +52,6 @@ struct fuse_ll
   pthread_mutex_t lock;
   int got_init;
   int got_destroy;
-  pthread_key_t pipe_key;
-  int broken_splice_nonblock;
   uint64_t notify_ctr;
   struct fuse_notify_req notify_list;
 };
diff --git a/libfuse/lib/fuse_lowlevel.cpp b/libfuse/lib/fuse_lowlevel.cpp
index f8a1d8f3..37a4a638 100644
--- a/libfuse/lib/fuse_lowlevel.cpp
+++ b/libfuse/lib/fuse_lowlevel.cpp
@@ -33,14 +33,6 @@
 #include <assert.h>
 #include <sys/file.h>
 
-#ifndef F_LINUX_SPECIFIC_BASE
-#define F_LINUX_SPECIFIC_BASE       1024
-#endif
-#ifndef F_SETPIPE_SZ
-#define F_SETPIPE_SZ	(F_LINUX_SPECIFIC_BASE + 7)
-#endif
-
-
 #define PARAM(inarg) (((char*)(inarg)) + sizeof(*(inarg)))
 #define OFFSET_MAX 0x7fffffffffffffffLL
 
@@ -436,22 +428,6 @@ fuse_reply_buf(fuse_req_t *req,
   return send_reply_ok(req, buf, size);
 }
 
-struct fuse_ll_pipe
-{
-  size_t size;
-  int can_grow;
-  int pipe[2];
-};
-
-static
-void
-fuse_ll_pipe_free(struct fuse_ll_pipe *llp)
-{
-  close(llp->pipe[0]);
-  close(llp->pipe[1]);
-  free(llp);
-}
-
 int
 fuse_reply_data(fuse_req_t   *req,
                 char         *buf_,
@@ -1748,7 +1724,6 @@ void
 fuse_ll_destroy(void *data)
 {
   struct fuse_ll *f = (struct fuse_ll *)data;
-  struct fuse_ll_pipe *llp;
 
   if(f->got_init && !f->got_destroy)
     {
@@ -1756,24 +1731,12 @@ fuse_ll_destroy(void *data)
         f->op.destroy(f->userdata);
     }
 
-  llp = (fuse_ll_pipe*)pthread_getspecific(f->pipe_key);
-  if(llp != NULL)
-    fuse_ll_pipe_free(llp);
-  pthread_key_delete(f->pipe_key);
   mutex_destroy(&f->lock);
   free(f);
 
   lfmp_clear(&g_FMP_fuse_req);
 }
 
-static
-void
-fuse_ll_pipe_destructor(void *data)
-{
-  struct fuse_ll_pipe *llp = (fuse_ll_pipe*)data;
-  fuse_ll_pipe_free(llp);
-}
-
 static
 void
 fuse_send_errno(struct fuse_ll   *f_,
@@ -1950,7 +1913,6 @@ fuse_lowlevel_new_common(struct fuse_args               *args,
                          size_t                          op_size,
                          void                           *userdata)
 {
-  int err;
   struct fuse_ll *f;
   struct fuse_session *se;
 
@@ -1971,16 +1933,8 @@ fuse_lowlevel_new_common(struct fuse_args               *args,
   f->notify_ctr = 1;
   mutex_init(&f->lock);
 
-  err = pthread_key_create(&f->pipe_key, fuse_ll_pipe_destructor);
-  if(err)
-    {
-      fprintf(stderr, "fuse: failed to create thread specific key: %s\n",
-              strerror(err));
-      goto out_free;
-    }
-
   if(fuse_opt_parse(args,NULL,fuse_ll_opts,fuse_ll_opt_proc) == -1)
-    goto out_key_destroy;
+    goto out_free;
 
   memcpy(&f->op, op, op_size);
   f->owner = getuid();
@@ -1992,12 +1946,10 @@ fuse_lowlevel_new_common(struct fuse_args               *args,
                         (void*)fuse_ll_destroy);
 
   if(!se)
-    goto out_key_destroy;
+    goto out_free;
 
   return se;
 
- out_key_destroy:
-  pthread_key_delete(f->pipe_key);
  out_free:
   mutex_destroy(&f->lock);
   free(f);