semanage-fcontext
Manage persistent SELinux security context rules on files/directories.
TLDR
List all file labelling rules
$ sudo semanage fcontext --list
List all user-defined file labelling rules without headings
$ sudo semanage fcontext --list --locallist --noheading
Add a user-defined rule that labels any path which matches a PCRE regex
$ sudo semanage fcontext --add --type [samba_share_t] ['/mnt/share(/.*)?']
Delete a user-defined rule using its PCRE regex
$ sudo semanage fcontext --delete ['/mnt/share(/.*)?']
Relabel a directory recursively by applying the new rules
$ restorecon -R -v [path/to/directory]