On 1 September 2015 at 21:27, Laurent Vivier <laur...@vivier.eu> wrote: > This patch allows to run example given by open_by_handle_at(2): > > The following shell session demonstrates the use of these two programs: > > $ echo 'Can you please think about it?' > cecilia.txt > $ ./t_name_to_handle_at cecilia.txt > fh > $ ./t_open_by_handle_at < fh > open_by_handle_at: Operation not permitted > $ sudo ./t_open_by_handle_at < fh # Need CAP_SYS_ADMIN > Read 31 bytes > $ rm cecilia.txt > > Now we delete and (quickly) re-create the file so that it has the same > content and (by chance) the same inode.[...] > > $ stat --printf="%i\n" cecilia.txt # Display inode number > 4072121 > $ rm cecilia.txt > $ echo 'Can you please think about it?' > cecilia.txt > $ stat --printf="%i\n" cecilia.txt # Check inode number > 4072121 > $ sudo ./t_open_by_handle_at < fh > open_by_handle_at: Stale NFS file handle > > See the man page for source code. > > Signed-off-by: Laurent Vivier <laur...@vivier.eu> > --- > v2: Rename function parameters, swap fh->handle_type in both functions, > When I have re-tested the patch I have found a bug in the size of > the data, so I fix this too (handle_bytes is the size of f_handle[] > only, not of the whole structure)
Reviewed-by: Peter Maydell <peter.mayd...@linaro.org> (I guess the signalfd patch needs to be rebased on top of this, since this adds another syscall that returns an fd...) thanks -- PMM
