On Wed, Jun 01, 2016 at 10:52:57AM +0300, Nikolay Borisov wrote: > This patch adds the necessary members to user_struct. The idea behind > the solution is really simple - user the userns pointers as keys into > a hash table which holds the inotify instances/watches counts. This > allows to account the limits per userns rather than per real user, > which makes certain scenarios such as a single mapped user in a > container deplete the inotify resources for all other users, which > map to the exact same real user. > > Signed-off-by: Nikolay Borisov <ker...@kyup.com> ... > +static inline unsigned long inotify_dec_return_dev(struct user_struct *user, > + void *key) > +{ > + struct inotify_state *state; > + unsigned long ret; > + > + spin_lock(&user->inotify_lock); > + state = __find_inotify_state(user, key); > + ret = --state->inotify_devs; > + spin_unlock(&user->inotify_lock); > + > + return ret; > +}
Hi Nikolay! Could you please explain why this new function is not used anywhere in other patches or I miss something obvious?