From: "edison.jiang" <jiangzhipeng@yulong.com> Android-R /sdcard mount FUSE filesystem type, use "dd" command to filli up /sdcard dir, Android will not boot normal, becase this system need at least 128M userspace. Test: open adb port, adb shell "dd if=dev/zero of=sdcard/ae bs=1024000 count=xxx" Result: if not limit size,Android system can not boot normal. Signed-off-by: edison.jiang <jiangzhipeng@yulong.com> --- fs/fuse/inode.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c index b0e18b4..f4e54505 100644 --- a/fs/fuse/inode.c +++ b/fs/fuse/inode.c @@ -477,6 +477,21 @@ static void convert_fuse_statfs(struct kstatfs *stbuf, struct fuse_kstatfs *attr stbuf->f_files = attr->files; stbuf->f_ffree = attr->ffree; stbuf->f_namelen = attr->namelen; +#ifdef LIMIT_SDCARD_SIZE + u32 data_free_size_th = 128*1024*1024; + + stbuf->f_blocks -= (u32)data_free_size_th/attr->bsize; + + if (stbuf->f_bfree < ((u32)data_free_size_th/attr->bsize)) + stbuf->f_bfree = 0; + else + stbuf->f_bfree -= (u32)data_free_size_th/attr->bsize; + + if (stbuf->f_bavail < ((u32)data_free_size_th/attr->bsize)) + stbuf->f_bavail = 0; + else + stbuf->f_bavail -= (u32)data_free_size_th/attr->bsize; +#endif /* fsid is left zero */ } -- 1.9.1
On Tue, 15 Jun 2021 at 08:41, jzp0409 <jzp0409@163.com> wrote:
>
> From: "edison.jiang" <jiangzhipeng@yulong.com>
>
> Android-R /sdcard mount FUSE filesystem type,
> use "dd" command to filli up /sdcard dir,
> Android will not boot normal,
> becase this system need at least 128M userspace.
>
> Test: open adb port,
> adb shell "dd if=dev/zero of=sdcard/ae bs=1024000 count=xxx"
>
> Result: if not limit size,Android system can not boot normal.
Without understanding the specifics, this does not look like a kernel
issue at all.
Why can't the fuse server do the limiting?
Thanks,
Miklos
On Fri, 18 Jun 2021 at 11:51, 蒋志鹏 <jzp0409@163.com> wrote:
>
> At 2021-06-18 15:10:27, "Miklos Szeredi" <miklos@szeredi.hu> wrote:
>
> >On Tue, 15 Jun 2021 at 08:41, jzp0409 <jzp0409@163.com> wrote:
> >>
> >> From: "edison.jiang" <jiangzhipeng@yulong.com>
> >>
> >> Android-R /sdcard mount FUSE filesystem type,
> >> use "dd" command to filli up /sdcard dir,
> >> Android will not boot normal,
> >> becase this system need at least 128M userspace.
> >>
> >> Test: open adb port,
> >> adb shell "dd if=dev/zero of=sdcard/ae bs=1024000 count=xxx"
> >>
> >> Result: if not limit size,Android system can not boot normal.
> >
> >Without understanding the specifics, this does not look like a kernel
> >issue at all.
> >
> >Why can't the fuse server do the limiting?
> >
> >Thanks,
> >Miklos
>
> Upstream nevert do the limiting,This leads to the problems I mentioned above。
> That's why I want to solve it from kernel.
Upstream of what?
Thanks,
Miklos