[fuse-devel] fusermount: mount failed: Invalid argument

[Frank M. <fr...@me...>]

Hello,

i'm trying to run fuse on an arm-based embedded system. When i
try to mount a filesystem i get this error message:

# ./fusexmp  /mnt/net/
fusermount: mount failed: Invalid argument

# insmod /lib/modules/fuse.ko
fuse init (API version 7.5)
fuse distribution version: 2.5.3
# ls -al /dev/fuse
crw-rw-rw-    1 root     root      10, 229 Dec 31  1969 /dev/fuse

To me it looks like the problem discussed in these postings:
http://sourceforge.net/mailarchive/forum.php?thread_id=10145055&forum_id=42692
(3 weeks ago)

I tried to apply the patch posted by Miklos Szeredi against fuse-2.5.3
and fuse-2.6.0-pre2 but couldn't compile the result in both cases.

diff -urN fuse-2.5.3/kernel/dev.c fuse-2.5.3_mod/kernel/dev.c
--- fuse-2.5.3/kernel/dev.c     2006-02-02 18:04:52.000000000 +0100
+++ fuse-2.5.3_mod/kernel/dev.c 2006-05-04 12:17:10.000000000 +0200
@@ -511,6 +511,7 @@
 static int fuse_copy_fill(struct fuse_copy_state *cs)
 {
        unsigned long offset;
+       struct vm_area_struct *vma;
        int err;

        unlock_request(cs->req);
@@ -524,13 +525,14 @@
        }
        down_read(&current->mm->mmap_sem);
        err = get_user_pages(current, current->mm, cs->addr, 1, cs->write, 0,
-                            &cs->pg, NULL);
+                            &cs->pg, &vma);
        up_read(&current->mm->mmap_sem);
        if (err < 0)
                return err;
        BUG_ON(err != 1);
        offset = cs->addr % PAGE_SIZE;
        cs->mapaddr = kmap_atomic(cs->pg, KM_USER0);
+       flush_cache_page(vma, cs->addr, page_to_pfn(cs->pg));
        cs->buf = cs->mapaddr + offset;
        cs->len = min(PAGE_SIZE - offset, cs->seglen);
        cs->seglen -= cs->len;


/build_arm_nofpu/fuse-2.6.0-pre2/kernel/dev.c: In function `fuse_copy_fill':
/build_arm_nofpu/fuse-2.6.0-pre2/kernel/dev.c:513: error: too many arguments to
function `flush_cache_page'
make[4]: *** [/build_arm_nofpu/fuse-2.6.0-pre2/kernel/dev.o] Error 1

The system i'm using is running linux-2.6.10.
The function signature on my system looks like this:
flush_cache_page(struct vm_area_struct *vma, unsigned long user_addr);

What do i have to pass to flush_cache_page()?

Thanks.

Regards,
   Frank