1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 28703e8a4SIngo Molnar #ifndef _LINUX_SCHED_USER_H 38703e8a4SIngo Molnar #define _LINUX_SCHED_USER_H 48703e8a4SIngo Molnar 5de8deb0aSIngo Molnar #include <linux/uidgid.h> 6de8deb0aSIngo Molnar #include <linux/atomic.h> 71e1c1583SNicholas Piggin #include <linux/percpu_counter.h> 8fc371912SSebastian Andrzej Siewior #include <linux/refcount.h> 9bef3efbeSLuck, Tony #include <linux/ratelimit.h> 108703e8a4SIngo Molnar 11bcbb6a5bSIngo Molnar /* 12bcbb6a5bSIngo Molnar * Some day this will be a full-fledged user tracking system.. 13bcbb6a5bSIngo Molnar */ 14bcbb6a5bSIngo Molnar struct user_struct { 15fc371912SSebastian Andrzej Siewior refcount_t __count; /* reference count */ 16bcbb6a5bSIngo Molnar #ifdef CONFIG_EPOLL 171e1c1583SNicholas Piggin struct percpu_counter epoll_watches; /* The number of file descriptors currently watched */ 18bcbb6a5bSIngo Molnar #endif 19bcbb6a5bSIngo Molnar unsigned long unix_inflight; /* How many files in flight in unix sockets */ 20bcbb6a5bSIngo Molnar atomic_long_t pipe_bufs; /* how many pages are allocated in pipe buffers */ 21bcbb6a5bSIngo Molnar 22bcbb6a5bSIngo Molnar /* Hash table maintenance information */ 23bcbb6a5bSIngo Molnar struct hlist_node uidhash_node; 24bcbb6a5bSIngo Molnar kuid_t uid; 25bcbb6a5bSIngo Molnar 26a91dbff5SWillem de Bruijn #if defined(CONFIG_PERF_EVENTS) || defined(CONFIG_BPF_SYSCALL) || \ 273c5a1b6fSMatthew Rosato defined(CONFIG_NET) || defined(CONFIG_IO_URING) || \ 28*ce5a23c8SJason Gunthorpe defined(CONFIG_VFIO_PCI_ZDEV_KVM) || IS_ENABLED(CONFIG_IOMMUFD) 29bcbb6a5bSIngo Molnar atomic_long_t locked_vm; 30bcbb6a5bSIngo Molnar #endif 3129e44f45SDavid Howells #ifdef CONFIG_WATCH_QUEUE 3229e44f45SDavid Howells atomic_t nr_watches; /* The number of watches this user currently has */ 3329e44f45SDavid Howells #endif 34bef3efbeSLuck, Tony 35bef3efbeSLuck, Tony /* Miscellaneous per-user rate limit */ 36bef3efbeSLuck, Tony struct ratelimit_state ratelimit; 37bcbb6a5bSIngo Molnar }; 38bcbb6a5bSIngo Molnar 39bcbb6a5bSIngo Molnar extern int uids_sysfs_init(void); 40bcbb6a5bSIngo Molnar 41bcbb6a5bSIngo Molnar extern struct user_struct *find_user(kuid_t); 42bcbb6a5bSIngo Molnar 43bcbb6a5bSIngo Molnar extern struct user_struct root_user; 44bcbb6a5bSIngo Molnar #define INIT_USER (&root_user) 45bcbb6a5bSIngo Molnar 46bcbb6a5bSIngo Molnar 47bcbb6a5bSIngo Molnar /* per-UID process charging. */ 48bcbb6a5bSIngo Molnar extern struct user_struct * alloc_uid(kuid_t); get_uid(struct user_struct * u)49bcbb6a5bSIngo Molnarstatic inline struct user_struct *get_uid(struct user_struct *u) 50bcbb6a5bSIngo Molnar { 51fc371912SSebastian Andrzej Siewior refcount_inc(&u->__count); 52bcbb6a5bSIngo Molnar return u; 53bcbb6a5bSIngo Molnar } 54bcbb6a5bSIngo Molnar extern void free_uid(struct user_struct *); 55bcbb6a5bSIngo Molnar 568703e8a4SIngo Molnar #endif /* _LINUX_SCHED_USER_H */ 57