On 13/07/2019 01.17, Ulli Horlacher wrote: > I need to find (all) subvolume directories. > I know, btrfs subvolumes root directories have inode #256, but a > "find / -inum 256" is horrible slow!
Having all required frameworks for this in btrbk, implementing a "list all subvolumes below <path>" command was quite easy to implement: https://github.com/digint/btrbk/commit/e12d980502 - get mounted filesystems from /proc/self/mountinfo - fetch subvolumes using "btrfs subvolume list" (fast, needs root) - filter and print subvolumes below mount point Note that this approach needs root, as "btrfs subvolume list" requires "cap_sys_admin" and "cap_dac_read_search". Try it: Download btrbk from "action-ls" feature branch (no dependencies needed): # cd /tmp # wget https://raw.githubusercontent.com/digint/btrbk/action-ls/btrbk # chmod +x /tmp/btrbk List subvolumes below /home: # ./btrbk ls /home # ./btrbk ls /home -t Comprehensive list of all accessible subvolumes: # ./btrbk ls / --format=long Show commands run by btrbk: # ./btrbk ls / -l debug If you need to run this as a regular user (and if you are brave), you can install setcap enabled btrfs binaries from: https://github.com/digint/btrfs-progs-btrbk Hope this helps, - Axel
