Hello, I am now able to read "/var/lib/lxcfs/sys/power/state" correctly through the FUSE file system. However, when I am trying to do a $echo "mem" > /var/lib/lxcfs/sys/power/state, I am getting "Operation not permitted" error.
I have ensured that /var/lib/lxcfs/sys/power/state mode is 644 through sys_getattr(...). My objective here is to capture the writing to file /sys/power/state and then start a thread to call "lxc-freeze" of the container OS. When I issue as root - $echo "mem" > /var/lib/lxcfs/sys/power/state, following is the sequence of function calls printed on the console using using lxcfs_info(...):- do_sys_getattr and path=/sys do_sys_getattr and path=/sys/power do_sys_getattr and path=/sys/power/state do_sys_open and path=/sys/power/state Inside funcion get_sysfile_size: Inside sys_open - length of buflen is:528 do_sys_release and path=/sys/power/state lxcfs_write(...) is never getting called. Can you please give me some pointers - what could be wrong? Thanks and Regards, Souvik On 6/3/20, Souvik Datta <sd.souvikda...@gmail.com> wrote: > Hello, > I am trying to understand the source code of LXCFS. My final objective > is to add /sys/power/state file as an entry. I understand the changes > that need to be done in sysfs_fuse.c/h to support this. > > To do this, first I am first trying to understand, how the sys entry - > "/sys/devices/system/cpu/online" has been added in the "target > directory - /var/lib/lxcfs" but I am not able to figure that out. > > Can you please give me some pointers so that I can understand how this > is achieved? > > > Regards, > _______________________________________________ lxc-devel mailing list lxc-devel@lists.linuxcontainers.org http://lists.linuxcontainers.org/listinfo/lxc-devel
